/*
THIS IS A GENERATED/BUNDLED FILE BY ROLLUP
if you want to view the source visit the plugins github repository
*/

'use strict';

var fs = require('fs');
var path$1 = require('path');
var obsidian = require('obsidian');
var child_process = require('child_process');
var cnst = require('constants');
var os = require('os');
var assert = require('assert');
var require$$0 = require('util');
var require$$0$1 = require('events');

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

function _interopNamespace(e) {
    if (e && e.__esModule) return e;
    var n = Object.create(null);
    if (e) {
        Object.keys(e).forEach(function (k) {
            if (k !== 'default') {
                var d = Object.getOwnPropertyDescriptor(e, k);
                Object.defineProperty(n, k, d.get ? d : {
                    enumerable: true,
                    get: function () {
                        return e[k];
                    }
                });
            }
        });
    }
    n['default'] = e;
    return Object.freeze(n);
}

var fs__default = /*#__PURE__*/_interopDefaultLegacy(fs);
var fs__namespace = /*#__PURE__*/_interopNamespace(fs);
var path__default = /*#__PURE__*/_interopDefaultLegacy(path$1);
var path__namespace = /*#__PURE__*/_interopNamespace(path$1);
var cnst__default = /*#__PURE__*/_interopDefaultLegacy(cnst);
var os__default = /*#__PURE__*/_interopDefaultLegacy(os);
var assert__default = /*#__PURE__*/_interopDefaultLegacy(assert);
var require$$0__default = /*#__PURE__*/_interopDefaultLegacy(require$$0);
var require$$0__default$1 = /*#__PURE__*/_interopDefaultLegacy(require$$0$1);

/*! *****************************************************************************
Copyright (c) Microsoft Corporation.

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
***************************************************************************** */

function __awaiter(thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
}

var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

function createCommonjsModule(fn, basedir, module) {
	return module = {
		path: basedir,
		exports: {},
		require: function (path, base) {
			return commonjsRequire(path, (base === undefined || base === null) ? module.path : base);
		}
	}, fn(module, module.exports), module.exports;
}

function commonjsRequire () {
	throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');
}

var lib = createCommonjsModule(function (module, exports) {
var __createBinding = (commonjsGlobal && commonjsGlobal.__createBinding) || (Object.create ? (function(o, m, k, k2) {
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    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (commonjsGlobal && commonjsGlobal.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (commonjsGlobal && commonjsGlobal.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
var __awaiter = (commonjsGlobal && commonjsGlobal.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (commonjsGlobal && commonjsGlobal.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
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            if (y = 0, t) op = [op[0] & 2, t.value];
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};
Object.defineProperty(exports, "__esModule", { value: true });
exports.lookpath = void 0;
var fs = __importStar(fs__default['default']);
var path = __importStar(path__default['default']);
var isWindows = /^win/i.test(process.platform);
/**
 * Sometimes, people want to look for local executable files
 * which are specified with either relative or absolute file path.
 * @private
 * @param cmd
 * @return {string} An absolute path of given command, or undefined.
 */
var isFilepath = function (cmd) {
    return cmd.includes(path.sep) ? path.resolve(cmd) : undefined;
};
/**
 * Just promisifies "fs.access"
 * @private
 * @param {string} fpath An absolute file path with an applicable extension appended.
 * @return {Promise<string>} Resolves absolute path or empty string.
 */
var access = function (fpath) {
    return new Promise(function (resolve) { return fs.access(fpath, fs.constants.X_OK, function (err) { return resolve(err ? undefined : fpath); }); });
};
/**
 * Resolves if the given file is executable or not, regarding "PATHEXT" to be applied.
 * @private
 * @param {string} abspath A file path to be checked.
 * @return {Promise<string>} Resolves the absolute file path just checked, or undefined.
 */
var isExecutable = function (abspath) { return __awaiter(void 0, void 0, void 0, function () {
    var exts, bins;
    return __generator(this, function (_a) {
        switch (_a.label) {
            case 0:
                exts = (process.env.PATHEXT || '').split(path.delimiter).concat('');
                return [4 /*yield*/, Promise.all(exts.map(function (ext) { return access(abspath + ext); }))];
            case 1:
                bins = _a.sent();
                return [2 /*return*/, bins.find(function (bin) { return !!bin; })];
        }
    });
}); };
/**
 * Returns a list of directories on which the target command should be looked for.
 * @private
 * @param {string[]} opt.include Will be added to "PATH" env.
 * @param {string[]} opt.exclude Will be filtered from "PATH" env.
 * @return {string[]} Directories to dig into.
 */
var getDirsToWalkThrough = function (opt) {
    var envname = isWindows ? 'Path' : 'PATH';
    return (process.env[envname] || '').split(path.delimiter).concat(opt.include || []).filter(function (p) { return !(opt.exclude || []).includes(p); });
};
/**
 * Returns async promise with absolute file path of given command,
 * and resolves with undefined if the command not found.
 * @param {string} command Command name to look for.
 * @param {LookPathOption} opt Options for lookpath.
 * @return {Promise<string|undefined>} Resolves absolute file path, or undefined if not found.
 */
function lookpath(command, opt) {
    if (opt === void 0) { opt = {}; }
    return __awaiter(this, void 0, void 0, function () {
        var directpath, dirs, bins;
        return __generator(this, function (_a) {
            switch (_a.label) {
                case 0:
                    directpath = isFilepath(command);
                    if (directpath)
                        return [2 /*return*/, isExecutable(directpath)];
                    dirs = getDirsToWalkThrough(opt);
                    return [4 /*yield*/, Promise.all(dirs.map(function (dir) { return isExecutable(path.join(dir, command)); }))];
                case 1:
                    bins = _a.sent();
                    return [2 /*return*/, bins.find(function (bin) { return !!bin; })];
            }
        });
    });
}
exports.lookpath = lookpath;
});

/*
 * pandoc.ts
 *
 * This module handles spawning Pandoc, passing it arguments, and streaming
 * to/from STDIN/STDOUT buffers if desired.
 *
 * Loosely based on https://github.com/eshinn/node-pandoc (MIT licensed)
 *
 */
const inputExtensions = ['md', 'docx', 'csv', 'html', 'tex', 'odt'];
// List of [pretty name, pandoc format name, file extension, shortened pretty name]
const outputFormats = [
    ['AsciiDoc (adoc)', 'asciidoc', 'adoc', 'AsciiDoc'],
    ['Word Document (docx)', 'docx', 'docx', 'Word'],
    ['Pandoc Markdown', 'markdown', 'pandoc.md', 'markdown'],
    ['HTML (without Pandoc)', 'html', 'html', 'HTML'],
    ['LaTeX', 'latex', 'tex', 'LaTeX'],
    ['OpenDocument (odt)', 'odt', 'odt', 'OpenDocument'],
    ['PowerPoint (pptx)', 'pptx', 'pptx', 'PowerPoint'],
    ['ePub', 'epub', 'epub', 'ePub'],
    ['PDF (via LaTeX)', 'pdf', 'pdf', 'PDF'],
    ['Reveal.js Slides', 'revealjs', 'reveal.html', 'Reveal.js'],
    ['Beamer Slides', 'beamer', 'beamer.tex', 'Beamer'],
    ['reStructured Text (RST)', 'rst', 'rst', 'RST'],
    ['DokuWiki', 'dokuwiki', 'txt', 'DokuWiki'],
    ['MediaWiki', 'mediawiki', 'mediawiki', 'MediaWiki'],
];
function needsLaTeX(format) {
    return format === 'pdf';
}
function needsPandoc(format) {
    return format !== 'html';
}
function needsStandaloneFlag(output) {
    return output.file.endsWith('html')
        || output.format === 'html'
        || output.format === 'revealjs'
        || output.format === 'latex'
        || output.format === 'beamer';
}
// Note: extraParams is a list of strings like ['-o', 'file.md']
// This rejects if the file doesn't get created
const pandoc = (input, output, extraParams) => __awaiter(void 0, void 0, void 0, function* () {
    return new Promise((resolve, reject) => __awaiter(void 0, void 0, void 0, function* () {
        const stdin = input.file === 'STDIN';
        const stdout = output.file === 'STDOUT';
        let pandoc;
        let result = '';
        let error = '';
        // Construct the Pandoc arguments list
        let args = [];
        if (input.format) {
            args.push('--from');
            args.push(input.format);
        }
        if (output.format) {
            args.push('--to');
            args.push(output.format);
        }
        if (needsStandaloneFlag(output))
            args.push('-s');
        if (!stdout) {
            args.push('-o');
            args.push(output.file);
        }
        else {
            args.push('-o');
            args.push('-');
        }
        // // Support Unicode in the PDF output if XeLaTeX is installed
        if (output.format === 'pdf' && (yield lib.lookpath('xelatex')))
            args.push('--pdf-engine=xelatex');
        if (!stdin) {
            args.push(input.file);
        }
        // The metadata title is needed for ePub and standalone HTML formats
        // We use a metadata file to avoid being vulnerable to command injection
        if (input.metadataFile)
            args.push('--metadata-file', input.metadataFile);
        // Extra parameters
        if (extraParams) {
            extraParams = extraParams.flatMap(x => x.split(' ')).filter(x => x.length);
            args.push(...extraParams);
        }
        function start() {
            // Spawn a Pandoc child process
            // Assumes Pandoc is installed and that the arguments are valid
            // The arguments aren't sanitised, so be careful!
            const env = Object.assign(process.env);
            if (input.pdflatex) {
                // Workaround for Windows having different PATH delimiters
                // to *every other operating system in existence*
                // *sigh*
                if (process.platform === 'win32')
                    env.PATH += ";";
                else
                    env.PATH += ":";
                env.PATH += path__namespace.dirname(input.pdflatex);
            }
            pandoc = child_process.spawn(input.pandoc || 'pandoc', args, { env: process.env });
            if (stdin) {
                // TODO: strip some unicode characters but not others
                // Currently we're stripping footnote back arrows but no
                // other characters to avoid localisation issues
                const contents = input.contents.replace(/[\u21a9\ufe0e]/g, '');
                pandoc.stdin.write(contents);
                pandoc.stdin.end();
            }
            // Handlers
            pandoc.stdout.on('data', (data) => {
                result += data;
            });
            pandoc.stderr.on('data', (err) => {
                error += err;
            });
            pandoc.stdout.on('end', () => {
                const value = {
                    result, error,
                    command: 'pandoc ' + args.join(' ')
                };
                if (output.file !== 'STDOUT') {
                    fs__namespace.stat(output.file, (err, stats) => {
                        // Call resolve if the file exists, reject otherwise
                        if (stats && stats.isFile()) {
                            resolve(value);
                        }
                        else {
                            reject(error);
                        }
                    });
                }
                else {
                    // Call resolve iff there is a nonempty result
                    (result.length ? resolve : reject)(value);
                    if (result.length) {
                        resolve(value);
                    }
                    else {
                        reject(error);
                    }
                }
            });
        }
        if (input.file === 'STDIN') {
            start();
        }
        else {
            // Check if the input file exists, and then start
            fs.stat(input.file, (err, stats) => {
                if (stats.isFile())
                    start();
                else
                    reject(new Error('Input file does not exist'));
            });
        }
    }));
});

const ALIAS = Symbol.for('yaml.alias');
const DOC = Symbol.for('yaml.document');
const MAP = Symbol.for('yaml.map');
const PAIR = Symbol.for('yaml.pair');
const SCALAR$1 = Symbol.for('yaml.scalar');
const SEQ = Symbol.for('yaml.seq');
const NODE_TYPE = Symbol.for('yaml.node.type');
const isAlias = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === ALIAS;
const isDocument = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === DOC;
const isMap = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === MAP;
const isPair = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === PAIR;
const isScalar = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === SCALAR$1;
const isSeq = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === SEQ;
function isCollection(node) {
    if (node && typeof node === 'object')
        switch (node[NODE_TYPE]) {
            case MAP:
            case SEQ:
                return true;
        }
    return false;
}
function isNode(node) {
    if (node && typeof node === 'object')
        switch (node[NODE_TYPE]) {
            case ALIAS:
            case MAP:
            case SCALAR$1:
            case SEQ:
                return true;
        }
    return false;
}
class NodeBase {
    constructor(type) {
        Object.defineProperty(this, NODE_TYPE, { value: type });
    }
}

const BREAK = Symbol('break visit');
const SKIP = Symbol('skip children');
const REMOVE = Symbol('remove node');
/**
 * Apply a visitor to an AST node or document.
 *
 * Walks through the tree (depth-first) starting from `node`, calling a
 * `visitor` function with three arguments:
 *   - `key`: For sequence values and map `Pair`, the node's index in the
 *     collection. Within a `Pair`, `'key'` or `'value'`, correspondingly.
 *     `null` for the root node.
 *   - `node`: The current node.
 *   - `path`: The ancestry of the current node.
 *
 * The return value of the visitor may be used to control the traversal:
 *   - `undefined` (default): Do nothing and continue
 *   - `visit.SKIP`: Do not visit the children of this node, continue with next
 *     sibling
 *   - `visit.BREAK`: Terminate traversal completely
 *   - `visit.REMOVE`: Remove the current node, then continue with the next one
 *   - `Node`: Replace the current node, then continue by visiting it
 *   - `number`: While iterating the items of a sequence or map, set the index
 *     of the next step. This is useful especially if the index of the current
 *     node has changed.
 *
 * If `visitor` is a single function, it will be called with all values
 * encountered in the tree, including e.g. `null` values. Alternatively,
 * separate visitor functions may be defined for each `Map`, `Pair`, `Seq`,
 * `Alias` and `Scalar` node.
 */
function visit(node, visitor) {
    if (isDocument(node)) {
        const cd = _visit(null, node.contents, visitor, Object.freeze([node]));
        if (cd === REMOVE)
            node.contents = null;
    }
    else
        _visit(null, node, visitor, Object.freeze([]));
}
// Without the `as symbol` casts, TS declares these in the `visit`
// namespace using `var`, but then complains about that because
// `unique symbol` must be `const`.
/** Terminate visit traversal completely */
visit.BREAK = BREAK;
/** Do not visit the children of the current node */
visit.SKIP = SKIP;
/** Remove the current node */
visit.REMOVE = REMOVE;
function _visit(key, node, visitor, path) {
    let ctrl = undefined;
    if (typeof visitor === 'function')
        ctrl = visitor(key, node, path);
    else if (isMap(node)) {
        if (visitor.Map)
            ctrl = visitor.Map(key, node, path);
    }
    else if (isSeq(node)) {
        if (visitor.Seq)
            ctrl = visitor.Seq(key, node, path);
    }
    else if (isPair(node)) {
        if (visitor.Pair)
            ctrl = visitor.Pair(key, node, path);
    }
    else if (isScalar(node)) {
        if (visitor.Scalar)
            ctrl = visitor.Scalar(key, node, path);
    }
    else if (isAlias(node)) {
        if (visitor.Alias)
            ctrl = visitor.Alias(key, node, path);
    }
    if (isNode(ctrl) || isPair(ctrl)) {
        const parent = path[path.length - 1];
        if (isCollection(parent)) {
            parent.items[key] = ctrl;
        }
        else if (isPair(parent)) {
            if (key === 'key')
                parent.key = ctrl;
            else
                parent.value = ctrl;
        }
        else if (isDocument(parent)) {
            parent.contents = ctrl;
        }
        else {
            const pt = isAlias(parent) ? 'alias' : 'scalar';
            throw new Error(`Cannot replace node with ${pt} parent`);
        }
        return _visit(key, ctrl, visitor, path);
    }
    if (typeof ctrl !== 'symbol') {
        if (isCollection(node)) {
            path = Object.freeze(path.concat(node));
            for (let i = 0; i < node.items.length; ++i) {
                const ci = _visit(i, node.items[i], visitor, path);
                if (typeof ci === 'number')
                    i = ci - 1;
                else if (ci === BREAK)
                    return BREAK;
                else if (ci === REMOVE) {
                    node.items.splice(i, 1);
                    i -= 1;
                }
            }
        }
        else if (isPair(node)) {
            path = Object.freeze(path.concat(node));
            const ck = _visit('key', node.key, visitor, path);
            if (ck === BREAK)
                return BREAK;
            else if (ck === REMOVE)
                node.key = null;
            const cv = _visit('value', node.value, visitor, path);
            if (cv === BREAK)
                return BREAK;
            else if (cv === REMOVE)
                node.value = null;
        }
    }
    return ctrl;
}

const escapeChars = {
    '!': '%21',
    ',': '%2C',
    '[': '%5B',
    ']': '%5D',
    '{': '%7B',
    '}': '%7D'
};
const escapeTagName = (tn) => tn.replace(/[!,[\]{}]/g, ch => escapeChars[ch]);
class Directives {
    constructor(yaml, tags) {
        /**
         * The directives-end/doc-start marker `---`. If `null`, a marker may still be
         * included in the document's stringified representation.
         */
        this.marker = null;
        this.yaml = Object.assign({}, Directives.defaultYaml, yaml);
        this.tags = Object.assign({}, Directives.defaultTags, tags);
    }
    /**
     * During parsing, get a Directives instance for the current document and
     * update the stream state according to the current version's spec.
     */
    atDocument() {
        const res = new Directives(this.yaml, this.tags);
        switch (this.yaml.version) {
            case '1.1':
                this.atNextDocument = true;
                break;
            case '1.2':
                this.atNextDocument = false;
                this.yaml = {
                    explicit: Directives.defaultYaml.explicit,
                    version: '1.2'
                };
                this.tags = Object.assign({}, Directives.defaultTags);
                break;
        }
        return res;
    }
    /**
     * @param onError - May be called even if the action was successful
     * @returns `true` on success
     */
    add(line, onError) {
        if (this.atNextDocument) {
            this.yaml = { explicit: Directives.defaultYaml.explicit, version: '1.1' };
            this.tags = Object.assign({}, Directives.defaultTags);
            this.atNextDocument = false;
        }
        const parts = line.trim().split(/[ \t]+/);
        const name = parts.shift();
        switch (name) {
            case '%TAG': {
                if (parts.length !== 2) {
                    onError(0, '%TAG directive should contain exactly two parts');
                    if (parts.length < 2)
                        return false;
                }
                const [handle, prefix] = parts;
                this.tags[handle] = prefix;
                return true;
            }
            case '%YAML': {
                this.yaml.explicit = true;
                if (parts.length < 1) {
                    onError(0, '%YAML directive should contain exactly one part');
                    return false;
                }
                const [version] = parts;
                if (version === '1.1' || version === '1.2') {
                    this.yaml.version = version;
                    return true;
                }
                else {
                    onError(6, `Unsupported YAML version ${version}`, true);
                    return false;
                }
            }
            default:
                onError(0, `Unknown directive ${name}`, true);
                return false;
        }
    }
    /**
     * Resolves a tag, matching handles to those defined in %TAG directives.
     *
     * @returns Resolved tag, which may also be the non-specific tag `'!'` or a
     *   `'!local'` tag, or `null` if unresolvable.
     */
    tagName(source, onError) {
        if (source === '!')
            return '!'; // non-specific tag
        if (source[0] !== '!') {
            onError(`Not a valid tag: ${source}`);
            return null;
        }
        if (source[1] === '<') {
            const verbatim = source.slice(2, -1);
            if (verbatim === '!' || verbatim === '!!') {
                onError(`Verbatim tags aren't resolved, so ${source} is invalid.`);
                return null;
            }
            if (source[source.length - 1] !== '>')
                onError('Verbatim tags must end with a >');
            return verbatim;
        }
        const [, handle, suffix] = source.match(/^(.*!)([^!]*)$/);
        if (!suffix)
            onError(`The ${source} tag has no suffix`);
        const prefix = this.tags[handle];
        if (prefix)
            return prefix + decodeURIComponent(suffix);
        if (handle === '!')
            return source; // local tag
        onError(`Could not resolve tag: ${source}`);
        return null;
    }
    /**
     * Given a fully resolved tag, returns its printable string form,
     * taking into account current tag prefixes and defaults.
     */
    tagString(tag) {
        for (const [handle, prefix] of Object.entries(this.tags)) {
            if (tag.startsWith(prefix))
                return handle + escapeTagName(tag.substring(prefix.length));
        }
        return tag[0] === '!' ? tag : `!<${tag}>`;
    }
    toString(doc) {
        const lines = this.yaml.explicit
            ? [`%YAML ${this.yaml.version || '1.2'}`]
            : [];
        const tagEntries = Object.entries(this.tags);
        let tagNames;
        if (doc && tagEntries.length > 0 && isNode(doc.contents)) {
            const tags = {};
            visit(doc.contents, (_key, node) => {
                if (isNode(node) && node.tag)
                    tags[node.tag] = true;
            });
            tagNames = Object.keys(tags);
        }
        else
            tagNames = [];
        for (const [handle, prefix] of tagEntries) {
            if (handle === '!!' && prefix === 'tag:yaml.org,2002:')
                continue;
            if (!doc || tagNames.some(tn => tn.startsWith(prefix)))
                lines.push(`%TAG ${handle} ${prefix}`);
        }
        return lines.join('\n');
    }
}
Directives.defaultYaml = { explicit: false, version: '1.2' };
Directives.defaultTags = { '!!': 'tag:yaml.org,2002:' };

/**
 * Recursively convert any node or its contents to native JavaScript
 *
 * @param value - The input value
 * @param arg - If `value` defines a `toJSON()` method, use this
 *   as its first argument
 * @param ctx - Conversion context, originally set in Document#toJS(). If
 *   `{ keep: true }` is not set, output should be suitable for JSON
 *   stringification.
 */
function toJS(value, arg, ctx) {
    if (Array.isArray(value))
        return value.map((v, i) => toJS(v, String(i), ctx));
    if (value && typeof value.toJSON === 'function') {
        if (!ctx)
            return value.toJSON(arg);
        const anchor = ctx.anchors && ctx.anchors.get(value);
        if (anchor)
            ctx.onCreate = res => {
                anchor.res = res;
                delete ctx.onCreate;
            };
        const res = value.toJSON(arg, ctx);
        if (anchor && ctx.onCreate)
            ctx.onCreate(res);
        return res;
    }
    if (!(ctx && ctx.keep) && typeof value === 'bigint')
        return Number(value);
    return value;
}

class Alias extends NodeBase {
    constructor(source) {
        super(ALIAS);
        this.source = source;
        Object.defineProperty(this, 'tag', {
            set() {
                throw new Error('Alias nodes cannot have tags');
            }
        });
    }
    toJSON(arg, ctx) {
        if (!ctx)
            return toJS(this.source, typeof arg === 'string' ? arg : null, ctx);
        const { anchors, maxAliasCount } = ctx;
        const anchor = anchors && anchors.get(this.source);
        /* istanbul ignore if */
        if (!anchor || anchor.res === undefined) {
            const msg = 'This should not happen: Alias anchor was not resolved?';
            throw new ReferenceError(msg);
        }
        if (maxAliasCount >= 0) {
            anchor.count += 1;
            if (anchor.aliasCount === 0)
                anchor.aliasCount = getAliasCount(this.source, anchors);
            if (anchor.count * anchor.aliasCount > maxAliasCount) {
                const msg = 'Excessive alias count indicates a resource exhaustion attack';
                throw new ReferenceError(msg);
            }
        }
        return anchor.res;
    }
    // Only called when stringifying an alias mapping key while constructing
    // Object output.
    toString({ anchors, doc, implicitKey, inStringifyKey }, _onComment, _onChompKeep) {
        let anchor = Object.keys(anchors).find(a => anchors[a] === this.source);
        if (!anchor && inStringifyKey)
            anchor = doc.anchors.getName(this.source) || doc.anchors.newName();
        if (anchor)
            return `*${anchor}${implicitKey ? ' ' : ''}`;
        const msg = doc.anchors.getName(this.source)
            ? 'Alias node must be after source node'
            : 'Source node not found for alias node';
        throw new Error(`${msg} [${this.range}]`);
    }
}
function getAliasCount(node, anchors) {
    if (isAlias(node)) {
        const anchor = anchors && anchors.get(node.source);
        return anchor ? anchor.count * anchor.aliasCount : 0;
    }
    else if (isCollection(node)) {
        let count = 0;
        for (const item of node.items) {
            const c = getAliasCount(item, anchors);
            if (c > count)
                count = c;
        }
        return count;
    }
    else if (isPair(node)) {
        const kc = getAliasCount(node.key, anchors);
        const vc = getAliasCount(node.value, anchors);
        return Math.max(kc, vc);
    }
    return 1;
}

const isScalarValue = (value) => !value || (typeof value !== 'function' && typeof value !== 'object');
class Scalar extends NodeBase {
    constructor(value) {
        super(SCALAR$1);
        this.value = value;
    }
    toJSON(arg, ctx) {
        return ctx && ctx.keep ? this.value : toJS(this.value, arg, ctx);
    }
    toString() {
        return String(this.value);
    }
}
Scalar.BLOCK_FOLDED = 'BLOCK_FOLDED';
Scalar.BLOCK_LITERAL = 'BLOCK_LITERAL';
Scalar.PLAIN = 'PLAIN';
Scalar.QUOTE_DOUBLE = 'QUOTE_DOUBLE';
Scalar.QUOTE_SINGLE = 'QUOTE_SINGLE';

const defaultTagPrefix = 'tag:yaml.org,2002:';
function findTagObject(value, tagName, tags) {
    if (tagName) {
        const match = tags.filter(t => t.tag === tagName);
        const tagObj = match.find(t => !t.format) || match[0];
        if (!tagObj)
            throw new Error(`Tag ${tagName} not found`);
        return tagObj;
    }
    return tags.find(t => t.identify && t.identify(value) && !t.format);
}
function createNode(value, tagName, ctx) {
    var _a, _b;
    if (isNode(value))
        return value;
    if (isPair(value)) {
        const map = (_b = (_a = ctx.schema.map).createNode) === null || _b === void 0 ? void 0 : _b.call(_a, ctx.schema, null, ctx);
        map.items.push(value);
        return map;
    }
    if (value instanceof String ||
        value instanceof Number ||
        value instanceof Boolean ||
        (typeof BigInt === 'function' && value instanceof BigInt) // not supported everywhere
    ) {
        // https://tc39.es/ecma262/#sec-serializejsonproperty
        value = value.valueOf();
    }
    const { onAlias, onTagObj, prevObjects } = ctx;
    const { map, seq, tags } = ctx.schema;
    if (tagName && tagName.startsWith('!!'))
        tagName = defaultTagPrefix + tagName.slice(2);
    let tagObj = findTagObject(value, tagName, tags);
    if (!tagObj) {
        if (value && typeof value.toJSON === 'function')
            value = value.toJSON();
        if (!value || typeof value !== 'object')
            return new Scalar(value);
        tagObj =
            value instanceof Map ? map : Symbol.iterator in Object(value) ? seq : map;
    }
    if (onTagObj) {
        onTagObj(tagObj);
        delete ctx.onTagObj;
    }
    // Detect duplicate references to the same object & use Alias nodes for all
    // after first. The `ref` wrapper allows for circular references to resolve.
    const ref = { value: undefined, node: undefined };
    if (value && typeof value === 'object') {
        const prev = prevObjects.get(value);
        if (prev)
            return onAlias(prev);
        ref.value = value;
        prevObjects.set(value, ref);
    }
    const node = (tagObj === null || tagObj === void 0 ? void 0 : tagObj.createNode)
        ? tagObj.createNode(ctx.schema, value, ctx)
        : new Scalar(value);
    if (tagName)
        node.tag = tagName;
    ref.node = node;
    return node;
}

function addCommentBefore(str, indent, comment) {
    if (!comment)
        return str;
    const cc = comment.replace(/[\s\S]^/gm, `$&${indent}#`);
    return `#${cc}\n${indent}${str}`;
}
function addComment(str, indent, comment) {
    return !comment
        ? str
        : comment.includes('\n')
            ? `${str}\n` + comment.replace(/^/gm, `${indent || ''}#`)
            : str.endsWith(' ')
                ? `${str}#${comment}`
                : `${str} #${comment}`;
}

const FOLD_FLOW = 'flow';
const FOLD_BLOCK = 'block';
const FOLD_QUOTED = 'quoted';
/**
 * Tries to keep input at up to `lineWidth` characters, splitting only on spaces
 * not followed by newlines or spaces unless `mode` is `'quoted'`. Lines are
 * terminated with `\n` and started with `indent`.
 */
function foldFlowLines(text, indent, mode = 'flow', { indentAtStart, lineWidth = 80, minContentWidth = 20, onFold, onOverflow } = {}) {
    if (!lineWidth || lineWidth < 0)
        return text;
    const endStep = Math.max(1 + minContentWidth, 1 + lineWidth - indent.length);
    if (text.length <= endStep)
        return text;
    const folds = [];
    const escapedFolds = {};
    let end = lineWidth - indent.length;
    if (typeof indentAtStart === 'number') {
        if (indentAtStart > lineWidth - Math.max(2, minContentWidth))
            folds.push(0);
        else
            end = lineWidth - indentAtStart;
    }
    let split = undefined;
    let prev = undefined;
    let overflow = false;
    let i = -1;
    let escStart = -1;
    let escEnd = -1;
    if (mode === FOLD_BLOCK) {
        i = consumeMoreIndentedLines(text, i);
        if (i !== -1)
            end = i + endStep;
    }
    for (let ch; (ch = text[(i += 1)]);) {
        if (mode === FOLD_QUOTED && ch === '\\') {
            escStart = i;
            switch (text[i + 1]) {
                case 'x':
                    i += 3;
                    break;
                case 'u':
                    i += 5;
                    break;
                case 'U':
                    i += 9;
                    break;
                default:
                    i += 1;
            }
            escEnd = i;
        }
        if (ch === '\n') {
            if (mode === FOLD_BLOCK)
                i = consumeMoreIndentedLines(text, i);
            end = i + endStep;
            split = undefined;
        }
        else {
            if (ch === ' ' &&
                prev &&
                prev !== ' ' &&
                prev !== '\n' &&
                prev !== '\t') {
                // space surrounded by non-space can be replaced with newline + indent
                const next = text[i + 1];
                if (next && next !== ' ' && next !== '\n' && next !== '\t')
                    split = i;
            }
            if (i >= end) {
                if (split) {
                    folds.push(split);
                    end = split + endStep;
                    split = undefined;
                }
                else if (mode === FOLD_QUOTED) {
                    // white-space collected at end may stretch past lineWidth
                    while (prev === ' ' || prev === '\t') {
                        prev = ch;
                        ch = text[(i += 1)];
                        overflow = true;
                    }
                    // Account for newline escape, but don't break preceding escape
                    const j = i > escEnd + 1 ? i - 2 : escStart - 1;
                    // Bail out if lineWidth & minContentWidth are shorter than an escape string
                    if (escapedFolds[j])
                        return text;
                    folds.push(j);
                    escapedFolds[j] = true;
                    end = j + endStep;
                    split = undefined;
                }
                else {
                    overflow = true;
                }
            }
        }
        prev = ch;
    }
    if (overflow && onOverflow)
        onOverflow();
    if (folds.length === 0)
        return text;
    if (onFold)
        onFold();
    let res = text.slice(0, folds[0]);
    for (let i = 0; i < folds.length; ++i) {
        const fold = folds[i];
        const end = folds[i + 1] || text.length;
        if (fold === 0)
            res = `\n${indent}${text.slice(0, end)}`;
        else {
            if (mode === FOLD_QUOTED && escapedFolds[fold])
                res += `${text[fold]}\\`;
            res += `\n${indent}${text.slice(fold + 1, end)}`;
        }
    }
    return res;
}
/**
 * Presumes `i + 1` is at the start of a line
 * @returns index of last newline in more-indented block
 */
function consumeMoreIndentedLines(text, i) {
    let ch = text[i + 1];
    while (ch === ' ' || ch === '\t') {
        do {
            ch = text[(i += 1)];
        } while (ch && ch !== '\n');
        ch = text[i + 1];
    }
    return i;
}

const getFoldOptions = (ctx) => ({
    indentAtStart: ctx.indentAtStart,
    lineWidth: ctx.options.lineWidth,
    minContentWidth: ctx.options.minContentWidth
});
// Also checks for lines starting with %, as parsing the output as YAML 1.1 will
// presume that's starting a new document.
const containsDocumentMarker = (str) => /^(%|---|\.\.\.)/m.test(str);
function lineLengthOverLimit(str, lineWidth, indentLength) {
    if (!lineWidth || lineWidth < 0)
        return false;
    const limit = lineWidth - indentLength;
    const strLen = str.length;
    if (strLen <= limit)
        return false;
    for (let i = 0, start = 0; i < strLen; ++i) {
        if (str[i] === '\n') {
            if (i - start > limit)
                return true;
            start = i + 1;
            if (strLen - start <= limit)
                return false;
        }
    }
    return true;
}
function doubleQuotedString(value, ctx) {
    const json = JSON.stringify(value);
    if (ctx.options.doubleQuotedAsJSON)
        return json;
    const { implicitKey } = ctx;
    const minMultiLineLength = ctx.options.doubleQuotedMinMultiLineLength;
    const indent = ctx.indent || (containsDocumentMarker(value) ? '  ' : '');
    let str = '';
    let start = 0;
    for (let i = 0, ch = json[i]; ch; ch = json[++i]) {
        if (ch === ' ' && json[i + 1] === '\\' && json[i + 2] === 'n') {
            // space before newline needs to be escaped to not be folded
            str += json.slice(start, i) + '\\ ';
            i += 1;
            start = i;
            ch = '\\';
        }
        if (ch === '\\')
            switch (json[i + 1]) {
                case 'u':
                    {
                        str += json.slice(start, i);
                        const code = json.substr(i + 2, 4);
                        switch (code) {
                            case '0000':
                                str += '\\0';
                                break;
                            case '0007':
                                str += '\\a';
                                break;
                            case '000b':
                                str += '\\v';
                                break;
                            case '001b':
                                str += '\\e';
                                break;
                            case '0085':
                                str += '\\N';
                                break;
                            case '00a0':
                                str += '\\_';
                                break;
                            case '2028':
                                str += '\\L';
                                break;
                            case '2029':
                                str += '\\P';
                                break;
                            default:
                                if (code.substr(0, 2) === '00')
                                    str += '\\x' + code.substr(2);
                                else
                                    str += json.substr(i, 6);
                        }
                        i += 5;
                        start = i + 1;
                    }
                    break;
                case 'n':
                    if (implicitKey ||
                        json[i + 2] === '"' ||
                        json.length < minMultiLineLength) {
                        i += 1;
                    }
                    else {
                        // folding will eat first newline
                        str += json.slice(start, i) + '\n\n';
                        while (json[i + 2] === '\\' &&
                            json[i + 3] === 'n' &&
                            json[i + 4] !== '"') {
                            str += '\n';
                            i += 2;
                        }
                        str += indent;
                        // space after newline needs to be escaped to not be folded
                        if (json[i + 2] === ' ')
                            str += '\\';
                        i += 1;
                        start = i + 1;
                    }
                    break;
                default:
                    i += 1;
            }
    }
    str = start ? str + json.slice(start) : json;
    return implicitKey
        ? str
        : foldFlowLines(str, indent, FOLD_QUOTED, getFoldOptions(ctx));
}
function singleQuotedString(value, ctx) {
    if (ctx.implicitKey) {
        if (/\n/.test(value))
            return doubleQuotedString(value, ctx);
    }
    else {
        // single quoted string can't have leading or trailing whitespace around newline
        if (/[ \t]\n|\n[ \t]/.test(value))
            return doubleQuotedString(value, ctx);
    }
    const indent = ctx.indent || (containsDocumentMarker(value) ? '  ' : '');
    const res = "'" + value.replace(/'/g, "''").replace(/\n+/g, `$&\n${indent}`) + "'";
    return ctx.implicitKey
        ? res
        : foldFlowLines(res, indent, FOLD_FLOW, getFoldOptions(ctx));
}
function blockString({ comment, type, value }, ctx, onComment, onChompKeep) {
    // 1. Block can't end in whitespace unless the last line is non-empty.
    // 2. Strings consisting of only whitespace are best rendered explicitly.
    if (/\n[\t ]+$/.test(value) || /^\s*$/.test(value)) {
        return doubleQuotedString(value, ctx);
    }
    const indent = ctx.indent ||
        (ctx.forceBlockIndent || containsDocumentMarker(value) ? '  ' : '');
    const indentSize = indent ? '2' : '1'; // root is at -1
    const literal = type === Scalar.BLOCK_FOLDED
        ? false
        : type === Scalar.BLOCK_LITERAL
            ? true
            : !lineLengthOverLimit(value, ctx.options.lineWidth, indent.length);
    let header = literal ? '|' : '>';
    if (!value)
        return header + '\n';
    let wsStart = '';
    let wsEnd = '';
    value = value
        .replace(/[\n\t ]*$/, ws => {
        const n = ws.indexOf('\n');
        if (n === -1) {
            header += '-'; // strip
        }
        else if (value === ws || n !== ws.length - 1) {
            header += '+'; // keep
            if (onChompKeep)
                onChompKeep();
        }
        wsEnd = ws.replace(/\n$/, '');
        return '';
    })
        .replace(/^[\n ]*/, ws => {
        if (ws.indexOf(' ') !== -1)
            header += indentSize;
        const m = ws.match(/ +$/);
        if (m) {
            wsStart = ws.slice(0, -m[0].length);
            return m[0];
        }
        else {
            wsStart = ws;
            return '';
        }
    });
    if (wsEnd)
        wsEnd = wsEnd.replace(/\n+(?!\n|$)/g, `$&${indent}`);
    if (wsStart)
        wsStart = wsStart.replace(/\n+/g, `$&${indent}`);
    if (comment) {
        header += ' #' + comment.replace(/ ?[\r\n]+/g, ' ');
        if (onComment)
            onComment();
    }
    if (!value)
        return `${header}${indentSize}\n${indent}${wsEnd}`;
    if (literal) {
        value = value.replace(/\n+/g, `$&${indent}`);
        return `${header}\n${indent}${wsStart}${value}${wsEnd}`;
    }
    value = value
        .replace(/\n+/g, '\n$&')
        .replace(/(?:^|\n)([\t ].*)(?:([\n\t ]*)\n(?![\n\t ]))?/g, '$1$2') // more-indented lines aren't folded
        //         ^ ind.line  ^ empty     ^ capture next empty lines only at end of indent
        .replace(/\n+/g, `$&${indent}`);
    const body = foldFlowLines(`${wsStart}${value}${wsEnd}`, indent, FOLD_BLOCK, getFoldOptions(ctx));
    return `${header}\n${indent}${body}`;
}
function plainString(item, ctx, onComment, onChompKeep) {
    var _a;
    const { comment, type, value } = item;
    const { actualString, implicitKey, indent, inFlow } = ctx;
    if ((implicitKey && /[\n[\]{},]/.test(value)) ||
        (inFlow && /[[\]{},]/.test(value))) {
        return doubleQuotedString(value, ctx);
    }
    if (!value ||
        /^[\n\t ,[\]{}#&*!|>'"%@`]|^[?-]$|^[?-][ \t]|[\n:][ \t]|[ \t]\n|[\n\t ]#|[\n\t :]$/.test(value)) {
        const hasDouble = value.indexOf('"') !== -1;
        const hasSingle = value.indexOf("'") !== -1;
        let quotedString;
        if (hasDouble && !hasSingle) {
            quotedString = singleQuotedString;
        }
        else if (hasSingle && !hasDouble) {
            quotedString = doubleQuotedString;
        }
        else if (ctx.options.singleQuote) {
            quotedString = singleQuotedString;
        }
        else {
            quotedString = doubleQuotedString;
        }
        // not allowed:
        // - empty string, '-' or '?'
        // - start with an indicator character (except [?:-]) or /[?-] /
        // - '\n ', ': ' or ' \n' anywhere
        // - '#' not preceded by a non-space char
        // - end with ' ' or ':'
        return implicitKey || inFlow || value.indexOf('\n') === -1
            ? quotedString(value, ctx)
            : blockString(item, ctx, onComment, onChompKeep);
    }
    if (!implicitKey &&
        !inFlow &&
        type !== Scalar.PLAIN &&
        value.indexOf('\n') !== -1) {
        // Where allowed & type not set explicitly, prefer block style for multiline strings
        return blockString(item, ctx, onComment, onChompKeep);
    }
    if (indent === '' && containsDocumentMarker(value)) {
        ctx.forceBlockIndent = true;
        return blockString(item, ctx, onComment, onChompKeep);
    }
    const str = value.replace(/\n+/g, `$&\n${indent}`);
    // Verify that output will be parsed as a string, as e.g. plain numbers and
    // booleans get parsed with those types in v1.2 (e.g. '42', 'true' & '0.9e-3'),
    // and others in v1.1.
    if (actualString) {
        for (const tag of ctx.doc.schema.tags) {
            if (tag.default &&
                tag.tag !== 'tag:yaml.org,2002:str' &&
                ((_a = tag.test) === null || _a === void 0 ? void 0 : _a.test(str)))
                return doubleQuotedString(value, ctx);
        }
    }
    const body = implicitKey
        ? str
        : foldFlowLines(str, indent, FOLD_FLOW, getFoldOptions(ctx));
    if (comment &&
        !inFlow &&
        (body.indexOf('\n') !== -1 || comment.indexOf('\n') !== -1)) {
        if (onComment)
            onComment();
        return addCommentBefore(body, indent, comment);
    }
    return body;
}
function stringifyString(item, ctx, onComment, onChompKeep) {
    const { implicitKey, inFlow } = ctx;
    const ss = typeof item.value === 'string'
        ? item
        : Object.assign({}, item, { value: String(item.value) });
    let { type } = item;
    if (type !== Scalar.QUOTE_DOUBLE) {
        // force double quotes on control characters & unpaired surrogates
        if (/[\x00-\x08\x0b-\x1f\x7f-\x9f\u{D800}-\u{DFFF}]/u.test(ss.value))
            type = Scalar.QUOTE_DOUBLE;
    }
    const _stringify = (_type) => {
        switch (_type) {
            case Scalar.BLOCK_FOLDED:
            case Scalar.BLOCK_LITERAL:
                return implicitKey || inFlow
                    ? doubleQuotedString(ss.value, ctx) // blocks are not valid inside flow containers
                    : blockString(ss, ctx, onComment, onChompKeep);
            case Scalar.QUOTE_DOUBLE:
                return doubleQuotedString(ss.value, ctx);
            case Scalar.QUOTE_SINGLE:
                return singleQuotedString(ss.value, ctx);
            case Scalar.PLAIN:
                return plainString(ss, ctx, onComment, onChompKeep);
            default:
                return null;
        }
    };
    let res = _stringify(type);
    if (res === null) {
        const { defaultKeyType, defaultStringType } = ctx.options;
        const t = (implicitKey && defaultKeyType) || defaultStringType;
        res = _stringify(t);
        if (res === null)
            throw new Error(`Unsupported default string type ${t}`);
    }
    return res;
}

const createStringifyContext = (doc, options) => ({
    anchors: Object.create(null),
    doc,
    indent: '',
    indentStep: typeof options.indent === 'number' ? ' '.repeat(options.indent) : '  ',
    options: Object.assign({
        defaultKeyType: null,
        defaultStringType: 'PLAIN',
        directives: null,
        doubleQuotedAsJSON: false,
        doubleQuotedMinMultiLineLength: 40,
        falseStr: 'false',
        indentSeq: true,
        lineWidth: 80,
        minContentWidth: 20,
        nullStr: 'null',
        simpleKeys: false,
        singleQuote: false,
        trueStr: 'true'
    }, options)
});
function getTagObject(tags, item) {
    if (item.tag) {
        const match = tags.filter(t => t.tag === item.tag);
        if (match.length > 0)
            return match.find(t => t.format === item.format) || match[0];
    }
    let tagObj = undefined;
    let obj;
    if (isScalar(item)) {
        obj = item.value;
        const match = tags.filter(t => t.identify && t.identify(obj));
        tagObj =
            match.find(t => t.format === item.format) || match.find(t => !t.format);
    }
    else {
        obj = item;
        tagObj = tags.find(t => t.nodeClass && obj instanceof t.nodeClass);
    }
    if (!tagObj) {
        // @ts-ignore
        const name = obj && obj.constructor ? obj.constructor.name : typeof obj;
        throw new Error(`Tag not resolved for ${name} value`);
    }
    return tagObj;
}
// needs to be called before value stringifier to allow for circular anchor refs
function stringifyProps(node, tagObj, { anchors, doc }) {
    const props = [];
    const anchor = doc.anchors.getName(node);
    if (anchor) {
        anchors[anchor] = node;
        props.push(`&${anchor}`);
    }
    if (node.tag) {
        props.push(doc.directives.tagString(node.tag));
    }
    else if (!tagObj.default) {
        props.push(doc.directives.tagString(tagObj.tag));
    }
    return props.join(' ');
}
function stringify$1(item, ctx, onComment, onChompKeep) {
    if (isPair(item))
        return item.toString(ctx, onComment, onChompKeep);
    if (isAlias(item))
        return item.toString(ctx);
    let tagObj = undefined;
    const node = isNode(item)
        ? item
        : ctx.doc.createNode(item, { onTagObj: o => (tagObj = o) });
    if (!tagObj)
        tagObj = getTagObject(ctx.doc.schema.tags, node);
    const props = stringifyProps(node, tagObj, ctx);
    if (props.length > 0)
        ctx.indentAtStart = (ctx.indentAtStart || 0) + props.length + 1;
    const str = typeof tagObj.stringify === 'function'
        ? tagObj.stringify(node, ctx, onComment, onChompKeep)
        : isScalar(node)
            ? stringifyString(node, ctx, onComment, onChompKeep)
            : node.toString(ctx, onComment, onChompKeep);
    if (!props)
        return str;
    return isScalar(node) || str[0] === '{' || str[0] === '['
        ? `${props} ${str}`
        : `${props}\n${ctx.indent}${str}`;
}

function collectionFromPath(schema, path, value) {
    let v = value;
    for (let i = path.length - 1; i >= 0; --i) {
        const k = path[i];
        if (typeof k === 'number' && Number.isInteger(k) && k >= 0) {
            const a = [];
            a[k] = v;
            v = a;
        }
        else {
            const o = {};
            Object.defineProperty(o, typeof k === 'symbol' ? k : String(k), {
                value: v,
                writable: true,
                enumerable: true,
                configurable: true
            });
            v = o;
        }
    }
    return createNode(v, undefined, {
        onAlias() {
            throw new Error('Repeated objects are not supported here');
        },
        prevObjects: new Map(),
        schema
    });
}
// null, undefined, or an empty non-string iterable (e.g. [])
const isEmptyPath = (path) => path == null ||
    (typeof path === 'object' && !!path[Symbol.iterator]().next().done);
class Collection extends NodeBase {
    constructor(type, schema) {
        super(type);
        Object.defineProperty(this, 'schema', {
            value: schema,
            configurable: true,
            enumerable: false,
            writable: true
        });
    }
    /**
     * Adds a value to the collection. For `!!map` and `!!omap` the value must
     * be a Pair instance or a `{ key, value }` object, which may not have a key
     * that already exists in the map.
     */
    addIn(path, value) {
        if (isEmptyPath(path))
            this.add(value);
        else {
            const [key, ...rest] = path;
            const node = this.get(key, true);
            if (isCollection(node))
                node.addIn(rest, value);
            else if (node === undefined && this.schema)
                this.set(key, collectionFromPath(this.schema, rest, value));
            else
                throw new Error(`Expected YAML collection at ${key}. Remaining path: ${rest}`);
        }
    }
    /**
     * Removes a value from the collection.
     * @returns `true` if the item was found and removed.
     */
    deleteIn([key, ...rest]) {
        if (rest.length === 0)
            return this.delete(key);
        const node = this.get(key, true);
        if (isCollection(node))
            return node.deleteIn(rest);
        else
            throw new Error(`Expected YAML collection at ${key}. Remaining path: ${rest}`);
    }
    /**
     * Returns item at `key`, or `undefined` if not found. By default unwraps
     * scalar values from their surrounding node; to disable set `keepScalar` to
     * `true` (collections are always returned intact).
     */
    getIn([key, ...rest], keepScalar) {
        const node = this.get(key, true);
        if (rest.length === 0)
            return !keepScalar && isScalar(node) ? node.value : node;
        else
            return isCollection(node) ? node.getIn(rest, keepScalar) : undefined;
    }
    hasAllNullValues(allowScalar) {
        return this.items.every(node => {
            if (!node || isNode(node))
                return false;
            const n = node.value;
            return (n == null ||
                (allowScalar &&
                    isScalar(n) &&
                    n.value == null &&
                    !n.commentBefore &&
                    !n.comment &&
                    !n.tag));
        });
    }
    /**
     * Checks if the collection includes a value with the key `key`.
     */
    hasIn([key, ...rest]) {
        if (rest.length === 0)
            return this.has(key);
        const node = this.get(key, true);
        return isCollection(node) ? node.hasIn(rest) : false;
    }
    /**
     * Sets a value in this collection. For `!!set`, `value` needs to be a
     * boolean to add/remove the item from the set.
     */
    setIn([key, ...rest], value) {
        if (rest.length === 0) {
            this.set(key, value);
        }
        else {
            const node = this.get(key, true);
            if (isCollection(node))
                node.setIn(rest, value);
            else if (node === undefined && this.schema)
                this.set(key, collectionFromPath(this.schema, rest, value));
            else
                throw new Error(`Expected YAML collection at ${key}. Remaining path: ${rest}`);
        }
    }
    _toString(ctx, { blockItem, flowChars, itemIndent }, onComment, onChompKeep) {
        const { indent, indentStep } = ctx;
        const inFlow = this.flow || ctx.inFlow;
        if (inFlow)
            itemIndent += indentStep;
        ctx = Object.assign({}, ctx, { indent: itemIndent, inFlow, type: null });
        let chompKeep = false;
        let hasItemWithNewLine = false;
        const nodes = this.items.reduce((nodes, item, i) => {
            let comment = null;
            if (isNode(item) || isPair(item)) {
                if (!chompKeep && item.spaceBefore)
                    nodes.push({ type: 'comment', str: '' });
                if (item.commentBefore) {
                    // This match will always succeed on a non-empty string
                    for (const line of item.commentBefore.match(/^.*$/gm))
                        nodes.push({ type: 'comment', str: `#${line}` });
                }
                if (item.comment)
                    comment = item.comment;
                const pair = item; // Apply guards manually in the following
                if (inFlow &&
                    ((!chompKeep && item.spaceBefore) ||
                        item.commentBefore ||
                        item.comment ||
                        (pair.key && (pair.key.commentBefore || pair.key.comment)) ||
                        (pair.value && (pair.value.commentBefore || pair.value.comment))))
                    hasItemWithNewLine = true;
            }
            chompKeep = false;
            let str = stringify$1(item, ctx, () => (comment = null), () => (chompKeep = true));
            if (inFlow && !hasItemWithNewLine && str.includes('\n'))
                hasItemWithNewLine = true;
            if (inFlow && i < this.items.length - 1)
                str += ',';
            str = addComment(str, itemIndent, comment);
            if (chompKeep && (comment || inFlow))
                chompKeep = false;
            nodes.push({ type: 'item', str });
            return nodes;
        }, []);
        let str;
        if (nodes.length === 0) {
            str = flowChars.start + flowChars.end;
        }
        else if (inFlow) {
            const { start, end } = flowChars;
            const strings = nodes.map(n => n.str);
            if (hasItemWithNewLine ||
                strings.reduce((sum, str) => sum + str.length + 2, 2) >
                    Collection.maxFlowStringSingleLineLength) {
                str = start;
                for (const s of strings) {
                    str += s ? `\n${indentStep}${indent}${s}` : '\n';
                }
                str += `\n${indent}${end}`;
            }
            else {
                str = `${start} ${strings.join(' ')} ${end}`;
            }
        }
        else {
            const strings = nodes.map(blockItem);
            str = strings.shift() || '';
            for (const s of strings)
                str += s ? `\n${indent}${s}` : '\n';
        }
        if (this.comment) {
            str += '\n' + this.comment.replace(/^/gm, `${indent}#`);
            if (onComment)
                onComment();
        }
        else if (chompKeep && onChompKeep)
            onChompKeep();
        return str;
    }
}
Collection.maxFlowStringSingleLineLength = 60;

function warn(logLevel, warning) {
    if (logLevel === 'debug' || logLevel === 'warn') {
        if (typeof process !== 'undefined' && process.emitWarning)
            process.emitWarning(warning);
        else
            console.warn(warning);
    }
}

function createPair(key, value, ctx) {
    const k = createNode(key, undefined, ctx);
    const v = createNode(value, undefined, ctx);
    return new Pair(k, v);
}
const isMergeKey = (key) => key === Pair.MERGE_KEY ||
    (isScalar(key) &&
        key.value === Pair.MERGE_KEY &&
        (!key.type || key.type === Scalar.PLAIN));
// If the value associated with a merge key is a single mapping node, each of
// its key/value pairs is inserted into the current mapping, unless the key
// already exists in it. If the value associated with the merge key is a
// sequence, then this sequence is expected to contain mapping nodes and each
// of these nodes is merged in turn according to its order in the sequence.
// Keys in mapping nodes earlier in the sequence override keys specified in
// later mapping nodes. -- http://yaml.org/type/merge.html
function mergeToJSMap(ctx, map, value) {
    if (!isAlias(value) || !isMap(value.source))
        throw new Error('Merge sources must be map aliases');
    const srcMap = value.source.toJSON(null, ctx, Map);
    for (const [key, value] of srcMap) {
        if (map instanceof Map) {
            if (!map.has(key))
                map.set(key, value);
        }
        else if (map instanceof Set) {
            map.add(key);
        }
        else if (!Object.prototype.hasOwnProperty.call(map, key)) {
            Object.defineProperty(map, key, {
                value,
                writable: true,
                enumerable: true,
                configurable: true
            });
        }
    }
    return map;
}
class Pair extends NodeBase {
    constructor(key, value = null) {
        super(PAIR);
        this.key = key;
        this.value = value;
    }
    // @ts-ignore This is fine.
    get commentBefore() {
        return isNode(this.key) ? this.key.commentBefore : undefined;
    }
    set commentBefore(cb) {
        if (this.key == null)
            this.key = new Scalar(null); // FIXME
        if (isNode(this.key))
            this.key.commentBefore = cb;
        else {
            const msg = 'Pair.commentBefore is an alias for Pair.key.commentBefore. To set it, the key must be a Node.';
            throw new Error(msg);
        }
    }
    // @ts-ignore This is fine.
    get spaceBefore() {
        return isNode(this.key) ? this.key.spaceBefore : undefined;
    }
    set spaceBefore(sb) {
        if (this.key == null)
            this.key = new Scalar(null); // FIXME
        if (isNode(this.key))
            this.key.spaceBefore = sb;
        else {
            const msg = 'Pair.spaceBefore is an alias for Pair.key.spaceBefore. To set it, the key must be a Node.';
            throw new Error(msg);
        }
    }
    addToJSMap(ctx, map) {
        if (ctx && ctx.doc.schema.merge && isMergeKey(this.key)) {
            if (isSeq(this.value))
                for (const it of this.value.items)
                    mergeToJSMap(ctx, map, it);
            else if (Array.isArray(this.value))
                for (const it of this.value)
                    mergeToJSMap(ctx, map, it);
            else
                mergeToJSMap(ctx, map, this.value);
        }
        else {
            const key = toJS(this.key, '', ctx);
            if (map instanceof Map) {
                const value = toJS(this.value, key, ctx);
                map.set(key, value);
            }
            else if (map instanceof Set) {
                map.add(key);
            }
            else {
                const stringKey = stringifyKey(this.key, key, ctx);
                const value = toJS(this.value, stringKey, ctx);
                if (stringKey in map)
                    Object.defineProperty(map, stringKey, {
                        value,
                        writable: true,
                        enumerable: true,
                        configurable: true
                    });
                else
                    map[stringKey] = value;
            }
        }
        return map;
    }
    toJSON(_, ctx) {
        const pair = ctx && ctx.mapAsMap ? new Map() : {};
        return this.addToJSMap(ctx, pair);
    }
    toString(ctx, onComment, onChompKeep) {
        if (!ctx || !ctx.doc)
            return JSON.stringify(this);
        const { allNullValues, doc, indent, indentStep, options: { indentSeq, simpleKeys } } = ctx;
        let { key, value } = this;
        let keyComment = (isNode(key) && key.comment) || null;
        if (simpleKeys) {
            if (keyComment) {
                throw new Error('With simple keys, key nodes cannot have comments');
            }
            if (isCollection(key)) {
                const msg = 'With simple keys, collection cannot be used as a key value';
                throw new Error(msg);
            }
        }
        let explicitKey = !simpleKeys &&
            (!key ||
                (keyComment && value == null) ||
                isCollection(key) ||
                (isScalar(key)
                    ? key.type === Scalar.BLOCK_FOLDED || key.type === Scalar.BLOCK_LITERAL
                    : typeof key === 'object'));
        ctx = Object.assign({}, ctx, {
            allNullValues: false,
            implicitKey: !explicitKey && (simpleKeys || !allNullValues),
            indent: indent + indentStep
        });
        let chompKeep = false;
        let str = stringify$1(key, ctx, () => (keyComment = null), () => (chompKeep = true));
        if (!explicitKey && !ctx.inFlow && str.length > 1024) {
            if (simpleKeys)
                throw new Error('With simple keys, single line scalar must not span more than 1024 characters');
            explicitKey = true;
        }
        if ((allNullValues && (!simpleKeys || ctx.inFlow)) ||
            (value == null && (explicitKey || ctx.inFlow))) {
            str = addComment(str, ctx.indent, keyComment);
            if (this.comment) {
                if (keyComment && !this.comment.includes('\n'))
                    str += `\n${ctx.indent || ''}#${this.comment}`;
                else
                    str = addComment(str, ctx.indent, this.comment);
                if (onComment)
                    onComment();
            }
            else if (chompKeep && !keyComment && onChompKeep)
                onChompKeep();
            return ctx.inFlow && !explicitKey ? str : `? ${str}`;
        }
        str = explicitKey
            ? `? ${addComment(str, ctx.indent, keyComment)}\n${indent}:`
            : addComment(`${str}:`, ctx.indent, keyComment);
        if (this.comment) {
            if (keyComment && !explicitKey && !this.comment.includes('\n'))
                str += `\n${ctx.indent || ''}#${this.comment}`;
            else
                str = addComment(str, ctx.indent, this.comment);
            if (onComment)
                onComment();
        }
        let vcb = '';
        let valueComment = null;
        if (isNode(value)) {
            if (value.spaceBefore)
                vcb = '\n';
            if (value.commentBefore) {
                const cs = value.commentBefore.replace(/^/gm, `${ctx.indent}#`);
                vcb += `\n${cs}`;
            }
            valueComment = value.comment;
        }
        else if (value && typeof value === 'object') {
            value = doc.createNode(value);
        }
        ctx.implicitKey = false;
        if (!explicitKey && !keyComment && !this.comment && isScalar(value))
            ctx.indentAtStart = str.length + 1;
        chompKeep = false;
        if (!indentSeq &&
            indentStep.length >= 2 &&
            !ctx.inFlow &&
            !explicitKey &&
            isSeq(value) &&
            !value.flow &&
            !value.tag &&
            !doc.anchors.getName(value)) {
            // If indentSeq === false, consider '- ' as part of indentation where possible
            ctx.indent = ctx.indent.substr(2);
        }
        const valueStr = stringify$1(value, ctx, () => (valueComment = null), () => (chompKeep = true));
        let ws = ' ';
        if (vcb || keyComment || this.comment) {
            ws = `${vcb}\n${ctx.indent}`;
        }
        else if (!explicitKey && isCollection(value)) {
            const flow = valueStr[0] === '[' || valueStr[0] === '{';
            if (!flow || valueStr.includes('\n'))
                ws = `\n${ctx.indent}`;
        }
        else if (valueStr[0] === '\n')
            ws = '';
        if (chompKeep && !valueComment && onChompKeep)
            onChompKeep();
        return addComment(str + ws + valueStr, ctx.indent, valueComment);
    }
}
Pair.MERGE_KEY = '<<';
function stringifyKey(key, jsKey, ctx) {
    if (jsKey === null)
        return '';
    if (typeof jsKey !== 'object')
        return String(jsKey);
    if (isNode(key) && ctx && ctx.doc) {
        const strCtx = createStringifyContext(ctx.doc, {});
        strCtx.inFlow = true;
        strCtx.inStringifyKey = true;
        const strKey = key.toString(strCtx);
        if (!ctx.mapKeyWarned) {
            let jsonStr = JSON.stringify(strKey);
            if (jsonStr.length > 40)
                jsonStr = jsonStr.substring(0, 36) + '..."';
            warn(ctx.doc.options.logLevel, `Keys with collection values will be stringified due to JS Object restrictions: ${jsonStr}. Set mapAsMap: true to use object keys.`);
            ctx.mapKeyWarned = true;
        }
        return strKey;
    }
    return JSON.stringify(jsKey);
}

/**
 * `yaml` defines document-specific options in three places: as an argument of
 * parse, create and stringify calls, in the values of `YAML.defaultOptions`,
 * and in the version-dependent `YAML.Document.defaults` object. Values set in
 * `YAML.defaultOptions` override version-dependent defaults, and argument
 * options override both.
 */
const defaultOptions = {
    anchorPrefix: 'a',
    intAsBigInt: false,
    keepUndefined: false,
    logLevel: 'warn',
    prettyErrors: true,
    strict: true,
    version: '1.2'
};

class YAMLSeq extends Collection {
    constructor(schema) {
        super(SEQ, schema);
        this.items = [];
    }
    static get tagName() {
        return 'tag:yaml.org,2002:seq';
    }
    add(value) {
        this.items.push(value);
    }
    /**
     * Removes a value from the collection.
     *
     * `key` must contain a representation of an integer for this to succeed.
     * It may be wrapped in a `Scalar`.
     *
     * @returns `true` if the item was found and removed.
     */
    delete(key) {
        const idx = asItemIndex(key);
        if (typeof idx !== 'number')
            return false;
        const del = this.items.splice(idx, 1);
        return del.length > 0;
    }
    /**
     * Returns item at `key`, or `undefined` if not found. By default unwraps
     * scalar values from their surrounding node; to disable set `keepScalar` to
     * `true` (collections are always returned intact).
     *
     * `key` must contain a representation of an integer for this to succeed.
     * It may be wrapped in a `Scalar`.
     */
    get(key, keepScalar) {
        const idx = asItemIndex(key);
        if (typeof idx !== 'number')
            return undefined;
        const it = this.items[idx];
        return !keepScalar && isScalar(it) ? it.value : it;
    }
    /**
     * Checks if the collection includes a value with the key `key`.
     *
     * `key` must contain a representation of an integer for this to succeed.
     * It may be wrapped in a `Scalar`.
     */
    has(key) {
        const idx = asItemIndex(key);
        return typeof idx === 'number' && idx < this.items.length;
    }
    /**
     * Sets a value in this collection. For `!!set`, `value` needs to be a
     * boolean to add/remove the item from the set.
     *
     * If `key` does not contain a representation of an integer, this will throw.
     * It may be wrapped in a `Scalar`.
     */
    set(key, value) {
        const idx = asItemIndex(key);
        if (typeof idx !== 'number')
            throw new Error(`Expected a valid index, not ${key}.`);
        const prev = this.items[idx];
        if (isScalar(prev) && isScalarValue(value))
            prev.value = value;
        else
            this.items[idx] = value;
    }
    toJSON(_, ctx) {
        const seq = [];
        if (ctx && ctx.onCreate)
            ctx.onCreate(seq);
        let i = 0;
        for (const item of this.items)
            seq.push(toJS(item, String(i++), ctx));
        return seq;
    }
    toString(ctx, onComment, onChompKeep) {
        if (!ctx)
            return JSON.stringify(this);
        return super._toString(ctx, {
            blockItem: n => (n.type === 'comment' ? n.str : `- ${n.str}`),
            flowChars: { start: '[', end: ']' },
            itemIndent: (ctx.indent || '') + '  '
        }, onComment, onChompKeep);
    }
}
function asItemIndex(key) {
    let idx = isScalar(key) ? key.value : key;
    if (idx && typeof idx === 'string')
        idx = Number(idx);
    return typeof idx === 'number' && Number.isInteger(idx) && idx >= 0
        ? idx
        : null;
}

class Anchors {
    constructor(prefix) {
        this.map = Object.create(null);
        this.prefix = prefix;
    }
    /**
     * Create a new `Alias` node, adding the required anchor for `node`.
     * If `name` is empty, a new anchor name will be generated.
     */
    createAlias(node, name) {
        this.setAnchor(node, name);
        return new Alias(node);
    }
    /**
     * Create a new merge `Pair` with the given source nodes.
     * Non-`Alias` sources will be automatically wrapped.
     */
    createMergePair(...sources) {
        const key = new Scalar(Pair.MERGE_KEY);
        const items = sources.map(s => {
            if (isAlias(s)) {
                if (isMap(s.source))
                    return s;
            }
            else if (isMap(s)) {
                return this.createAlias(s);
            }
            throw new Error('Merge sources must be Map nodes or their Aliases');
        });
        if (items.length === 1)
            return new Pair(key, items[0]);
        const seq = new YAMLSeq();
        seq.items = items;
        return new Pair(key, seq);
    }
    /** The anchor name associated with `node`, if set. */
    getName(node) {
        return Object.keys(this.map).find(a => this.map[a] === node);
    }
    /** List of all defined anchor names. */
    getNames() {
        return Object.keys(this.map);
    }
    /** The node associated with the anchor `name`, if set. */
    getNode(name) {
        return this.map[name];
    }
    /**
     * Find an available anchor name with the given `prefix` and a
     * numerical suffix.
     */
    newName(prefix) {
        if (!prefix)
            prefix = this.prefix;
        const names = Object.keys(this.map);
        for (let i = 1; true; ++i) {
            const name = `${prefix}${i}`;
            if (!names.includes(name))
                return name;
        }
    }
    /**
     * Associate an anchor with `node`. If `name` is empty, a new name will be generated.
     * To remove an anchor, use `setAnchor(null, name)`.
     */
    setAnchor(node, name) {
        const { map } = this;
        if (!node) {
            if (!name)
                return null;
            delete map[name];
            return name;
        }
        if (!isScalar(node) && !isCollection(node))
            throw new Error('Anchors may only be set for Scalar, Seq and Map nodes');
        if (name) {
            if (/[\x00-\x19\s,[\]{}]/.test(name))
                throw new Error('Anchor names must not contain whitespace or control characters');
            const prevNode = map[name];
            if (prevNode && prevNode !== node)
                map[this.newName(name)] = prevNode;
        }
        const prevName = Object.keys(map).find(a => map[a] === node);
        if (prevName) {
            if (!name || prevName === name)
                return prevName;
            delete map[prevName];
        }
        else if (!name)
            name = this.newName();
        map[name] = node;
        return name;
    }
}

function stringifyNumber({ format, minFractionDigits, tag, value }) {
    if (typeof value === 'bigint')
        return String(value);
    const num = typeof value === 'number' ? value : Number(value);
    if (!isFinite(num))
        return isNaN(num) ? '.nan' : num < 0 ? '-.inf' : '.inf';
    let n = JSON.stringify(value);
    if (!format &&
        minFractionDigits &&
        (!tag || tag === 'tag:yaml.org,2002:float') &&
        /^\d/.test(n)) {
        let i = n.indexOf('.');
        if (i < 0) {
            i = n.length;
            n += '.';
        }
        let d = minFractionDigits - (n.length - i - 1);
        while (d-- > 0)
            n += '0';
    }
    return n;
}

function findPair(items, key) {
    const k = isScalar(key) ? key.value : key;
    for (const it of items) {
        if (isPair(it)) {
            if (it.key === key || it.key === k)
                return it;
            if (isScalar(it.key) && it.key.value === k)
                return it;
        }
    }
    return undefined;
}
class YAMLMap extends Collection {
    constructor(schema) {
        super(MAP, schema);
        this.items = [];
    }
    static get tagName() {
        return 'tag:yaml.org,2002:map';
    }
    /**
     * Adds a value to the collection.
     *
     * @param overwrite - If not set `true`, using a key that is already in the
     *   collection will throw. Otherwise, overwrites the previous value.
     */
    add(pair, overwrite) {
        let _pair;
        if (isPair(pair))
            _pair = pair;
        else if (!pair || typeof pair !== 'object' || !('key' in pair)) {
            // In TypeScript, this never happens.
            _pair = new Pair(pair, pair.value);
        }
        else
            _pair = new Pair(pair.key, pair.value);
        const prev = findPair(this.items, _pair.key);
        const sortEntries = this.schema && this.schema.sortMapEntries;
        if (prev) {
            if (!overwrite)
                throw new Error(`Key ${_pair.key} already set`);
            // For scalars, keep the old node & its comments and anchors
            if (isScalar(prev.value) && isScalarValue(_pair.value))
                prev.value.value = _pair.value;
            else
                prev.value = _pair.value;
        }
        else if (sortEntries) {
            const i = this.items.findIndex(item => sortEntries(_pair, item) < 0);
            if (i === -1)
                this.items.push(_pair);
            else
                this.items.splice(i, 0, _pair);
        }
        else {
            this.items.push(_pair);
        }
    }
    delete(key) {
        const it = findPair(this.items, key);
        if (!it)
            return false;
        const del = this.items.splice(this.items.indexOf(it), 1);
        return del.length > 0;
    }
    get(key, keepScalar) {
        const it = findPair(this.items, key);
        const node = it && it.value;
        return !keepScalar && isScalar(node) ? node.value : node;
    }
    has(key) {
        return !!findPair(this.items, key);
    }
    set(key, value) {
        this.add(new Pair(key, value), true);
    }
    /**
     * @param ctx - Conversion context, originally set in Document#toJS()
     * @param {Class} Type - If set, forces the returned collection type
     * @returns Instance of Type, Map, or Object
     */
    toJSON(_, ctx, Type) {
        const map = Type ? new Type() : ctx && ctx.mapAsMap ? new Map() : {};
        if (ctx && ctx.onCreate)
            ctx.onCreate(map);
        for (const item of this.items)
            item.addToJSMap(ctx, map);
        return map;
    }
    toString(ctx, onComment, onChompKeep) {
        if (!ctx)
            return JSON.stringify(this);
        for (const item of this.items) {
            if (!isPair(item))
                throw new Error(`Map items must all be pairs; found ${JSON.stringify(item)} instead`);
        }
        if (!ctx.allNullValues && this.hasAllNullValues(false))
            ctx = Object.assign({}, ctx, { allNullValues: true });
        return super._toString(ctx, {
            blockItem: n => n.str,
            flowChars: { start: '{', end: '}' },
            itemIndent: ctx.indent || ''
        }, onComment, onChompKeep);
    }
}

function createMap(schema, obj, ctx) {
    const { keepUndefined, replacer } = ctx;
    const map = new YAMLMap(schema);
    const add = (key, value) => {
        if (typeof replacer === 'function')
            value = replacer.call(obj, key, value);
        else if (Array.isArray(replacer) && !replacer.includes(key))
            return;
        if (value !== undefined || keepUndefined)
            map.items.push(createPair(key, value, ctx));
    };
    if (obj instanceof Map) {
        for (const [key, value] of obj)
            add(key, value);
    }
    else if (obj && typeof obj === 'object') {
        for (const key of Object.keys(obj))
            add(key, obj[key]);
    }
    if (typeof schema.sortMapEntries === 'function') {
        map.items.sort(schema.sortMapEntries);
    }
    return map;
}
const map = {
    collection: 'map',
    createNode: createMap,
    default: true,
    nodeClass: YAMLMap,
    tag: 'tag:yaml.org,2002:map',
    resolve(map, onError) {
        if (!isMap(map))
            onError('Expected a mapping for this tag');
        return map;
    }
};

function createSeq(schema, obj, ctx) {
    const { replacer } = ctx;
    const seq = new YAMLSeq(schema);
    if (obj && Symbol.iterator in Object(obj)) {
        let i = 0;
        for (let it of obj) {
            if (typeof replacer === 'function') {
                const key = obj instanceof Set ? it : String(i++);
                it = replacer.call(obj, key, it);
            }
            seq.items.push(createNode(it, undefined, ctx));
        }
    }
    return seq;
}
const seq = {
    collection: 'seq',
    createNode: createSeq,
    default: true,
    nodeClass: YAMLSeq,
    tag: 'tag:yaml.org,2002:seq',
    resolve(seq, onError) {
        if (!isSeq(seq))
            onError('Expected a sequence for this tag');
        return seq;
    }
};

const string = {
    identify: value => typeof value === 'string',
    default: true,
    tag: 'tag:yaml.org,2002:str',
    resolve: str => str,
    stringify(item, ctx, onComment, onChompKeep) {
        ctx = Object.assign({ actualString: true }, ctx);
        return stringifyString(item, ctx, onComment, onChompKeep);
    }
};

const failsafe = [map, seq, string];

const intIdentify$2 = (value) => typeof value === 'bigint' || Number.isInteger(value);
const intResolve$1 = (str, offset, radix, { intAsBigInt }) => (intAsBigInt ? BigInt(str) : parseInt(str.substring(offset), radix));
function intStringify$1(node, radix, prefix) {
    const { value } = node;
    if (intIdentify$2(value) && value >= 0)
        return prefix + value.toString(radix);
    return stringifyNumber(node);
}
const nullObj$1 = {
    identify: value => value == null,
    createNode: () => new Scalar(null),
    default: true,
    tag: 'tag:yaml.org,2002:null',
    test: /^(?:~|[Nn]ull|NULL)?$/,
    resolve: () => new Scalar(null),
    stringify: ({ source }, ctx) => source && nullObj$1.test.test(source) ? source : ctx.options.nullStr
};
const boolObj = {
    identify: value => typeof value === 'boolean',
    default: true,
    tag: 'tag:yaml.org,2002:bool',
    test: /^(?:[Tt]rue|TRUE|[Ff]alse|FALSE)$/,
    resolve: str => new Scalar(str[0] === 't' || str[0] === 'T'),
    stringify({ source, value }, ctx) {
        if (source && boolObj.test.test(source)) {
            const sv = source[0] === 't' || source[0] === 'T';
            if (value === sv)
                return source;
        }
        return value ? ctx.options.trueStr : ctx.options.falseStr;
    }
};
const octObj = {
    identify: value => intIdentify$2(value) && value >= 0,
    default: true,
    tag: 'tag:yaml.org,2002:int',
    format: 'OCT',
    test: /^0o[0-7]+$/,
    resolve: (str, _onError, opt) => intResolve$1(str, 2, 8, opt),
    stringify: node => intStringify$1(node, 8, '0o')
};
const intObj = {
    identify: intIdentify$2,
    default: true,
    tag: 'tag:yaml.org,2002:int',
    test: /^[-+]?[0-9]+$/,
    resolve: (str, _onError, opt) => intResolve$1(str, 0, 10, opt),
    stringify: stringifyNumber
};
const hexObj = {
    identify: value => intIdentify$2(value) && value >= 0,
    default: true,
    tag: 'tag:yaml.org,2002:int',
    format: 'HEX',
    test: /^0x[0-9a-fA-F]+$/,
    resolve: (str, _onError, opt) => intResolve$1(str, 2, 16, opt),
    stringify: node => intStringify$1(node, 16, '0x')
};
const nanObj = {
    identify: value => typeof value === 'number',
    default: true,
    tag: 'tag:yaml.org,2002:float',
    test: /^(?:[-+]?\.(?:inf|Inf|INF|nan|NaN|NAN))$/,
    resolve: str => str.slice(-3).toLowerCase() === 'nan'
        ? NaN
        : str[0] === '-'
            ? Number.NEGATIVE_INFINITY
            : Number.POSITIVE_INFINITY,
    stringify: stringifyNumber
};
const expObj = {
    identify: value => typeof value === 'number',
    default: true,
    tag: 'tag:yaml.org,2002:float',
    format: 'EXP',
    test: /^[-+]?(?:\.[0-9]+|[0-9]+(?:\.[0-9]*)?)[eE][-+]?[0-9]+$/,
    resolve: str => parseFloat(str),
    stringify: ({ value }) => Number(value).toExponential()
};
const floatObj = {
    identify: value => typeof value === 'number',
    default: true,
    tag: 'tag:yaml.org,2002:float',
    test: /^[-+]?(?:\.[0-9]+|[0-9]+\.[0-9]*)$/,
    resolve(str) {
        const node = new Scalar(parseFloat(str));
        const dot = str.indexOf('.');
        if (dot !== -1 && str[str.length - 1] === '0')
            node.minFractionDigits = str.length - dot - 1;
        return node;
    },
    stringify: stringifyNumber
};
const core = failsafe.concat([
    nullObj$1,
    boolObj,
    octObj,
    intObj,
    hexObj,
    nanObj,
    expObj,
    floatObj
]);

/* global BigInt */
function intIdentify$1(value) {
    return typeof value === 'bigint' || Number.isInteger(value);
}
const stringifyJSON = ({ value }) => JSON.stringify(value);
const jsonScalars = [
    {
        identify: value => typeof value === 'string',
        default: true,
        tag: 'tag:yaml.org,2002:str',
        resolve: str => str,
        stringify: stringifyJSON
    },
    {
        identify: value => value == null,
        createNode: () => new Scalar(null),
        default: true,
        tag: 'tag:yaml.org,2002:null',
        test: /^null$/,
        resolve: () => null,
        stringify: stringifyJSON
    },
    {
        identify: value => typeof value === 'boolean',
        default: true,
        tag: 'tag:yaml.org,2002:bool',
        test: /^true|false$/,
        resolve: str => str === 'true',
        stringify: stringifyJSON
    },
    {
        identify: intIdentify$1,
        default: true,
        tag: 'tag:yaml.org,2002:int',
        test: /^-?(?:0|[1-9][0-9]*)$/,
        resolve: (str, _onError, { intAsBigInt }) => intAsBigInt ? BigInt(str) : parseInt(str, 10),
        stringify: ({ value }) => intIdentify$1(value) ? value.toString() : JSON.stringify(value)
    },
    {
        identify: value => typeof value === 'number',
        default: true,
        tag: 'tag:yaml.org,2002:float',
        test: /^-?(?:0|[1-9][0-9]*)(?:\.[0-9]*)?(?:[eE][-+]?[0-9]+)?$/,
        resolve: str => parseFloat(str),
        stringify: stringifyJSON
    }
];
const jsonError = {
    default: true,
    tag: '',
    test: /^/,
    resolve(str, onError) {
        onError(`Unresolved plain scalar ${JSON.stringify(str)}`);
        return str;
    }
};
const json = [map, seq].concat(jsonScalars, jsonError);

const binary = {
    identify: value => value instanceof Uint8Array,
    default: false,
    tag: 'tag:yaml.org,2002:binary',
    /**
     * Returns a Buffer in node and an Uint8Array in browsers
     *
     * To use the resulting buffer as an image, you'll want to do something like:
     *
     *   const blob = new Blob([buffer], { type: 'image/jpeg' })
     *   document.querySelector('#photo').src = URL.createObjectURL(blob)
     */
    resolve(src, onError) {
        if (typeof Buffer === 'function') {
            return Buffer.from(src, 'base64');
        }
        else if (typeof atob === 'function') {
            // On IE 11, atob() can't handle newlines
            const str = atob(src.replace(/[\n\r]/g, ''));
            const buffer = new Uint8Array(str.length);
            for (let i = 0; i < str.length; ++i)
                buffer[i] = str.charCodeAt(i);
            return buffer;
        }
        else {
            onError('This environment does not support reading binary tags; either Buffer or atob is required');
            return src;
        }
    },
    stringify({ comment, type, value }, ctx, onComment, onChompKeep) {
        const buf = value; // checked earlier by binary.identify()
        let str;
        if (typeof Buffer === 'function') {
            str =
                buf instanceof Buffer
                    ? buf.toString('base64')
                    : Buffer.from(buf.buffer).toString('base64');
        }
        else if (typeof btoa === 'function') {
            let s = '';
            for (let i = 0; i < buf.length; ++i)
                s += String.fromCharCode(buf[i]);
            str = btoa(s);
        }
        else {
            throw new Error('This environment does not support writing binary tags; either Buffer or btoa is required');
        }
        if (!type)
            type = Scalar.BLOCK_LITERAL;
        if (type !== Scalar.QUOTE_DOUBLE) {
            const lineWidth = Math.max(ctx.options.lineWidth - ctx.indent.length, ctx.options.minContentWidth);
            const n = Math.ceil(str.length / lineWidth);
            const lines = new Array(n);
            for (let i = 0, o = 0; i < n; ++i, o += lineWidth) {
                lines[i] = str.substr(o, lineWidth);
            }
            str = lines.join(type === Scalar.BLOCK_LITERAL ? '\n' : ' ');
        }
        return stringifyString({ comment, type, value: str }, ctx, onComment, onChompKeep);
    }
};

function resolvePairs(seq, onError) {
    if (isSeq(seq)) {
        for (let i = 0; i < seq.items.length; ++i) {
            let item = seq.items[i];
            if (isPair(item))
                continue;
            else if (isMap(item)) {
                if (item.items.length > 1)
                    onError('Each pair must have its own sequence indicator');
                const pair = item.items[0] || new Pair(null);
                if (item.commentBefore)
                    pair.commentBefore = pair.commentBefore
                        ? `${item.commentBefore}\n${pair.commentBefore}`
                        : item.commentBefore;
                if (item.comment)
                    pair.comment = pair.comment
                        ? `${item.comment}\n${pair.comment}`
                        : item.comment;
                item = pair;
            }
            seq.items[i] = isPair(item) ? item : new Pair(item);
        }
    }
    else
        onError('Expected a sequence for this tag');
    return seq;
}
function createPairs(schema, iterable, ctx) {
    const { replacer } = ctx;
    const pairs = new YAMLSeq(schema);
    pairs.tag = 'tag:yaml.org,2002:pairs';
    let i = 0;
    if (iterable && Symbol.iterator in Object(iterable))
        for (let it of iterable) {
            if (typeof replacer === 'function')
                it = replacer.call(iterable, String(i++), it);
            let key, value;
            if (Array.isArray(it)) {
                if (it.length === 2) {
                    key = it[0];
                    value = it[1];
                }
                else
                    throw new TypeError(`Expected [key, value] tuple: ${it}`);
            }
            else if (it && it instanceof Object) {
                const keys = Object.keys(it);
                if (keys.length === 1) {
                    key = keys[0];
                    value = it[key];
                }
                else
                    throw new TypeError(`Expected { key: value } tuple: ${it}`);
            }
            else {
                key = it;
            }
            pairs.items.push(createPair(key, value, ctx));
        }
    return pairs;
}
const pairs = {
    collection: 'seq',
    default: false,
    tag: 'tag:yaml.org,2002:pairs',
    resolve: resolvePairs,
    createNode: createPairs
};

class YAMLOMap extends YAMLSeq {
    constructor() {
        super();
        this.add = YAMLMap.prototype.add.bind(this);
        this.delete = YAMLMap.prototype.delete.bind(this);
        this.get = YAMLMap.prototype.get.bind(this);
        this.has = YAMLMap.prototype.has.bind(this);
        this.set = YAMLMap.prototype.set.bind(this);
        this.tag = YAMLOMap.tag;
    }
    /**
     * If `ctx` is given, the return type is actually `Map<unknown, unknown>`,
     * but TypeScript won't allow widening the signature of a child method.
     */
    toJSON(_, ctx) {
        if (!ctx)
            return super.toJSON(_);
        const map = new Map();
        if (ctx && ctx.onCreate)
            ctx.onCreate(map);
        for (const pair of this.items) {
            let key, value;
            if (isPair(pair)) {
                key = toJS(pair.key, '', ctx);
                value = toJS(pair.value, key, ctx);
            }
            else {
                key = toJS(pair, '', ctx);
            }
            if (map.has(key))
                throw new Error('Ordered maps must not include duplicate keys');
            map.set(key, value);
        }
        return map;
    }
}
YAMLOMap.tag = 'tag:yaml.org,2002:omap';
const omap = {
    collection: 'seq',
    identify: value => value instanceof Map,
    nodeClass: YAMLOMap,
    default: false,
    tag: 'tag:yaml.org,2002:omap',
    resolve(seq, onError) {
        const pairs = resolvePairs(seq, onError);
        const seenKeys = [];
        for (const { key } of pairs.items) {
            if (isScalar(key)) {
                if (seenKeys.includes(key.value)) {
                    onError(`Ordered maps must not include duplicate keys: ${key.value}`);
                }
                else {
                    seenKeys.push(key.value);
                }
            }
        }
        return Object.assign(new YAMLOMap(), pairs);
    },
    createNode(schema, iterable, ctx) {
        const pairs = createPairs(schema, iterable, ctx);
        const omap = new YAMLOMap();
        omap.items = pairs.items;
        return omap;
    }
};

class YAMLSet extends YAMLMap {
    constructor(schema) {
        super(schema);
        this.tag = YAMLSet.tag;
    }
    add(key) {
        let pair;
        if (isPair(key))
            pair = key;
        else if (typeof key === 'object' &&
            'key' in key &&
            'value' in key &&
            key.value === null)
            pair = new Pair(key.key, null);
        else
            pair = new Pair(key, null);
        const prev = findPair(this.items, pair.key);
        if (!prev)
            this.items.push(pair);
    }
    get(key, keepPair) {
        const pair = findPair(this.items, key);
        return !keepPair && isPair(pair)
            ? isScalar(pair.key)
                ? pair.key.value
                : pair.key
            : pair;
    }
    set(key, value) {
        if (typeof value !== 'boolean')
            throw new Error(`Expected boolean value for set(key, value) in a YAML set, not ${typeof value}`);
        const prev = findPair(this.items, key);
        if (prev && !value) {
            this.items.splice(this.items.indexOf(prev), 1);
        }
        else if (!prev && value) {
            this.items.push(new Pair(key));
        }
    }
    toJSON(_, ctx) {
        return super.toJSON(_, ctx, Set);
    }
    toString(ctx, onComment, onChompKeep) {
        if (!ctx)
            return JSON.stringify(this);
        if (this.hasAllNullValues(true))
            return super.toString(Object.assign({}, ctx, { allNullValues: true }), onComment, onChompKeep);
        else
            throw new Error('Set items must all have null values');
    }
}
YAMLSet.tag = 'tag:yaml.org,2002:set';
const set = {
    collection: 'map',
    identify: value => value instanceof Set,
    nodeClass: YAMLSet,
    default: false,
    tag: 'tag:yaml.org,2002:set',
    resolve(map, onError) {
        if (isMap(map)) {
            if (map.hasAllNullValues(true))
                return Object.assign(new YAMLSet(), map);
            else
                onError('Set items must all have null values');
        }
        else
            onError('Expected a mapping for this tag');
        return map;
    },
    createNode(schema, iterable, ctx) {
        const { replacer } = ctx;
        const set = new YAMLSet(schema);
        if (iterable && Symbol.iterator in Object(iterable))
            for (let value of iterable) {
                if (typeof replacer === 'function')
                    value = replacer.call(iterable, value, value);
                set.items.push(createPair(value, null, ctx));
            }
        return set;
    }
};

/** Internal types handle bigint as number, because TS can't figure it out. */
function parseSexagesimal(str, asBigInt) {
    const sign = str[0];
    const parts = sign === '-' || sign === '+' ? str.substring(1) : str;
    const num = (n) => asBigInt ? BigInt(n) : Number(n);
    const res = parts
        .replace(/_/g, '')
        .split(':')
        .reduce((res, p) => res * num(60) + num(p), num(0));
    return (sign === '-' ? num(-1) * res : res);
}
/**
 * hhhh:mm:ss.sss
 *
 * Internal types handle bigint as number, because TS can't figure it out.
 */
function stringifySexagesimal(node) {
    let { value } = node;
    let num = (n) => n;
    if (typeof value === 'bigint')
        num = n => BigInt(n);
    else if (isNaN(value) || !isFinite(value))
        return stringifyNumber(node);
    let sign = '';
    if (value < 0) {
        sign = '-';
        value *= num(-1);
    }
    const _60 = num(60);
    const parts = [value % _60]; // seconds, including ms
    if (value < 60) {
        parts.unshift(0); // at least one : is required
    }
    else {
        value = (value - parts[0]) / _60;
        parts.unshift(value % _60); // minutes
        if (value >= 60) {
            value = (value - parts[0]) / _60;
            parts.unshift(value); // hours
        }
    }
    return (sign +
        parts
            .map(n => (n < 10 ? '0' + String(n) : String(n)))
            .join(':')
            .replace(/000000\d*$/, '') // % 60 may introduce error
    );
}
const intTime = {
    identify: value => typeof value === 'bigint' || Number.isInteger(value),
    default: true,
    tag: 'tag:yaml.org,2002:int',
    format: 'TIME',
    test: /^[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+$/,
    resolve: (str, _onError, { intAsBigInt }) => parseSexagesimal(str, intAsBigInt),
    stringify: stringifySexagesimal
};
const floatTime = {
    identify: value => typeof value === 'number',
    default: true,
    tag: 'tag:yaml.org,2002:float',
    format: 'TIME',
    test: /^[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\.[0-9_]*$/,
    resolve: str => parseSexagesimal(str, false),
    stringify: stringifySexagesimal
};
const timestamp = {
    identify: value => value instanceof Date,
    default: true,
    tag: 'tag:yaml.org,2002:timestamp',
    // If the time zone is omitted, the timestamp is assumed to be specified in UTC. The time part
    // may be omitted altogether, resulting in a date format. In such a case, the time part is
    // assumed to be 00:00:00Z (start of day, UTC).
    test: RegExp('^([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})' + // YYYY-Mm-Dd
        '(?:' + // time is optional
        '(?:t|T|[ \\t]+)' + // t | T | whitespace
        '([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2}(\\.[0-9]+)?)' + // Hh:Mm:Ss(.ss)?
        '(?:[ \\t]*(Z|[-+][012]?[0-9](?::[0-9]{2})?))?' + // Z | +5 | -03:30
        ')?$'),
    resolve(str) {
        const match = str.match(timestamp.test);
        if (!match)
            throw new Error('!!timestamp expects a date, starting with yyyy-mm-dd');
        const [, year, month, day, hour, minute, second] = match.map(Number);
        const millisec = match[7] ? Number((match[7] + '00').substr(1, 3)) : 0;
        let date = Date.UTC(year, month - 1, day, hour || 0, minute || 0, second || 0, millisec);
        const tz = match[8];
        if (tz && tz !== 'Z') {
            let d = parseSexagesimal(tz, false);
            if (Math.abs(d) < 30)
                d *= 60;
            date -= 60000 * d;
        }
        return new Date(date);
    },
    stringify: ({ value }) => value.toISOString().replace(/((T00:00)?:00)?\.000Z$/, '')
};

const nullObj = {
    identify: value => value == null,
    createNode: () => new Scalar(null),
    default: true,
    tag: 'tag:yaml.org,2002:null',
    test: /^(?:~|[Nn]ull|NULL)?$/,
    resolve: () => new Scalar(null),
    stringify: ({ source }, ctx) => source && nullObj.test.test(source) ? source : ctx.options.nullStr
};
function boolStringify({ value, source }, ctx) {
    const boolObj = value ? trueObj : falseObj;
    if (source && boolObj.test.test(source))
        return source;
    return value ? ctx.options.trueStr : ctx.options.falseStr;
}
const trueObj = {
    identify: value => value === true,
    default: true,
    tag: 'tag:yaml.org,2002:bool',
    test: /^(?:Y|y|[Yy]es|YES|[Tt]rue|TRUE|[Oo]n|ON)$/,
    resolve: () => new Scalar(true),
    stringify: boolStringify
};
const falseObj = {
    identify: value => value === false,
    default: true,
    tag: 'tag:yaml.org,2002:bool',
    test: /^(?:N|n|[Nn]o|NO|[Ff]alse|FALSE|[Oo]ff|OFF)$/i,
    resolve: () => new Scalar(false),
    stringify: boolStringify
};
const intIdentify = (value) => typeof value === 'bigint' || Number.isInteger(value);
function intResolve(str, offset, radix, { intAsBigInt }) {
    const sign = str[0];
    if (sign === '-' || sign === '+')
        offset += 1;
    str = str.substring(offset).replace(/_/g, '');
    if (intAsBigInt) {
        switch (radix) {
            case 2:
                str = `0b${str}`;
                break;
            case 8:
                str = `0o${str}`;
                break;
            case 16:
                str = `0x${str}`;
                break;
        }
        const n = BigInt(str);
        return sign === '-' ? BigInt(-1) * n : n;
    }
    const n = parseInt(str, radix);
    return sign === '-' ? -1 * n : n;
}
function intStringify(node, radix, prefix) {
    const { value } = node;
    if (intIdentify(value)) {
        const str = value.toString(radix);
        return value < 0 ? '-' + prefix + str.substr(1) : prefix + str;
    }
    return stringifyNumber(node);
}
const yaml11 = failsafe.concat([
    nullObj,
    trueObj,
    falseObj,
    {
        identify: intIdentify,
        default: true,
        tag: 'tag:yaml.org,2002:int',
        format: 'BIN',
        test: /^[-+]?0b[0-1_]+$/,
        resolve: (str, _onError, opt) => intResolve(str, 2, 2, opt),
        stringify: node => intStringify(node, 2, '0b')
    },
    {
        identify: intIdentify,
        default: true,
        tag: 'tag:yaml.org,2002:int',
        format: 'OCT',
        test: /^[-+]?0[0-7_]+$/,
        resolve: (str, _onError, opt) => intResolve(str, 1, 8, opt),
        stringify: node => intStringify(node, 8, '0')
    },
    {
        identify: intIdentify,
        default: true,
        tag: 'tag:yaml.org,2002:int',
        test: /^[-+]?[0-9][0-9_]*$/,
        resolve: (str, _onError, opt) => intResolve(str, 0, 10, opt),
        stringify: stringifyNumber
    },
    {
        identify: intIdentify,
        default: true,
        tag: 'tag:yaml.org,2002:int',
        format: 'HEX',
        test: /^[-+]?0x[0-9a-fA-F_]+$/,
        resolve: (str, _onError, opt) => intResolve(str, 2, 16, opt),
        stringify: node => intStringify(node, 16, '0x')
    },
    {
        identify: value => typeof value === 'number',
        default: true,
        tag: 'tag:yaml.org,2002:float',
        test: /^[-+]?\.(?:inf|Inf|INF|nan|NaN|NAN)$/,
        resolve: (str) => str.slice(-3).toLowerCase() === 'nan'
            ? NaN
            : str[0] === '-'
                ? Number.NEGATIVE_INFINITY
                : Number.POSITIVE_INFINITY,
        stringify: stringifyNumber
    },
    {
        identify: value => typeof value === 'number',
        default: true,
        tag: 'tag:yaml.org,2002:float',
        format: 'EXP',
        test: /^[-+]?(?:[0-9][0-9_]*)?(?:\.[0-9_]*)?[eE][-+]?[0-9]+$/,
        resolve: (str) => parseFloat(str.replace(/_/g, '')),
        stringify: ({ value }) => Number(value).toExponential()
    },
    {
        identify: value => typeof value === 'number',
        default: true,
        tag: 'tag:yaml.org,2002:float',
        test: /^[-+]?(?:[0-9][0-9_]*)?\.[0-9_]*$/,
        resolve(str) {
            const node = new Scalar(parseFloat(str.replace(/_/g, '')));
            const dot = str.indexOf('.');
            if (dot !== -1) {
                const f = str.substring(dot + 1).replace(/_/g, '');
                if (f[f.length - 1] === '0')
                    node.minFractionDigits = f.length;
            }
            return node;
        },
        stringify: stringifyNumber
    }
], binary, omap, pairs, set, intTime, floatTime, timestamp);

const schemas = { core, failsafe, json, yaml11 };
const tags = {
    binary,
    bool: boolObj,
    float: floatObj,
    floatExp: expObj,
    floatNaN: nanObj,
    floatTime,
    int: intObj,
    intHex: hexObj,
    intOct: octObj,
    intTime,
    map,
    null: nullObj$1,
    omap,
    pairs,
    seq,
    set,
    timestamp
};

function getSchemaTags(schemas, knownTags, customTags, schemaName) {
    const schemaId = schemaName.replace(/\W/g, ''); // 'yaml-1.1' -> 'yaml11'
    let tags = schemas[schemaId];
    if (!tags) {
        const keys = Object.keys(schemas)
            .map(key => JSON.stringify(key))
            .join(', ');
        throw new Error(`Unknown schema "${schemaName}"; use one of ${keys}`);
    }
    if (Array.isArray(customTags)) {
        for (const tag of customTags)
            tags = tags.concat(tag);
    }
    else if (typeof customTags === 'function') {
        tags = customTags(tags.slice());
    }
    return tags.map(tag => {
        if (typeof tag !== 'string')
            return tag;
        const tagObj = knownTags[tag];
        if (tagObj)
            return tagObj;
        const keys = Object.keys(knownTags)
            .map(key => JSON.stringify(key))
            .join(', ');
        throw new Error(`Unknown custom tag "${tag}"; use one of ${keys}`);
    });
}

const sortMapEntriesByKey = (a, b) => a.key < b.key ? -1 : a.key > b.key ? 1 : 0;
const coreKnownTags = {
    'tag:yaml.org,2002:binary': tags.binary,
    'tag:yaml.org,2002:omap': tags.omap,
    'tag:yaml.org,2002:pairs': tags.pairs,
    'tag:yaml.org,2002:set': tags.set,
    'tag:yaml.org,2002:timestamp': tags.timestamp
};
class Schema {
    constructor({ customTags, merge, resolveKnownTags, schema, sortMapEntries }) {
        // Used by createNode(), to avoid circular dependencies
        this.map = tags.map;
        this.seq = tags.seq;
        this.merge = !!merge;
        this.name = schema || 'core';
        this.knownTags = resolveKnownTags ? coreKnownTags : {};
        this.tags = getSchemaTags(schemas, tags, customTags, this.name);
        // Used by createMap()
        this.sortMapEntries =
            sortMapEntries === true ? sortMapEntriesByKey : sortMapEntries || null;
    }
}

/**
 * Applies the JSON.parse reviver algorithm as defined in the ECMA-262 spec,
 * in section 24.5.1.1 "Runtime Semantics: InternalizeJSONProperty" of the
 * 2021 edition: https://tc39.es/ecma262/#sec-json.parse
 *
 * Includes extensions for handling Map and Set objects.
 */
function applyReviver(reviver, obj, key, val) {
    if (val && typeof val === 'object') {
        if (Array.isArray(val)) {
            for (let i = 0, len = val.length; i < len; ++i) {
                const v0 = val[i];
                const v1 = applyReviver(reviver, val, String(i), v0);
                if (v1 === undefined)
                    delete val[i];
                else if (v1 !== v0)
                    val[i] = v1;
            }
        }
        else if (val instanceof Map) {
            for (const k of Array.from(val.keys())) {
                const v0 = val.get(k);
                const v1 = applyReviver(reviver, val, k, v0);
                if (v1 === undefined)
                    val.delete(k);
                else if (v1 !== v0)
                    val.set(k, v1);
            }
        }
        else if (val instanceof Set) {
            for (const v0 of Array.from(val)) {
                const v1 = applyReviver(reviver, val, v0, v0);
                if (v1 === undefined)
                    val.delete(v0);
                else if (v1 !== v0) {
                    val.delete(v0);
                    val.add(v1);
                }
            }
        }
        else {
            for (const [k, v0] of Object.entries(val)) {
                const v1 = applyReviver(reviver, val, k, v0);
                if (v1 === undefined)
                    delete val[k];
                else if (v1 !== v0)
                    val[k] = v1;
            }
        }
    }
    return reviver.call(obj, key, val);
}

class Document {
    constructor(value, replacer, options) {
        /** A comment before this Document */
        this.commentBefore = null;
        /** A comment immediately after this Document */
        this.comment = null;
        /** Errors encountered during parsing. */
        this.errors = [];
        /** Warnings encountered during parsing. */
        this.warnings = [];
        Object.defineProperty(this, NODE_TYPE, { value: DOC });
        let _replacer = undefined;
        if (typeof replacer === 'function' || Array.isArray(replacer)) {
            _replacer = replacer;
        }
        else if (options === undefined && replacer) {
            options = replacer;
            replacer = undefined;
        }
        const opt = Object.assign({}, defaultOptions, options);
        this.options = opt;
        this.anchors = new Anchors(this.options.anchorPrefix);
        let { version } = opt;
        if (options === null || options === void 0 ? void 0 : options.directives) {
            this.directives = options.directives.atDocument();
            if (this.directives.yaml.explicit)
                version = this.directives.yaml.version;
        }
        else
            this.directives = new Directives({ version });
        this.setSchema(version, options);
        this.contents =
            value === undefined
                ? null
                : this.createNode(value, { replacer: _replacer });
    }
    /** Adds a value to the document. */
    add(value) {
        if (assertCollection(this.contents))
            this.contents.add(value);
    }
    /** Adds a value to the document. */
    addIn(path, value) {
        if (assertCollection(this.contents))
            this.contents.addIn(path, value);
    }
    /**
     * Convert any value into a `Node` using the current schema, recursively
     * turning objects into collections.
     */
    createNode(value, { flow, keepUndefined, onTagObj, replacer, tag } = {}) {
        if (typeof replacer === 'function')
            value = replacer.call({ '': value }, '', value);
        else if (Array.isArray(replacer)) {
            const keyToStr = (v) => typeof v === 'number' || v instanceof String || v instanceof Number;
            const asStr = replacer.filter(keyToStr).map(String);
            if (asStr.length > 0)
                replacer = replacer.concat(asStr);
        }
        if (typeof keepUndefined !== 'boolean')
            keepUndefined = !!this.options.keepUndefined;
        const aliasNodes = [];
        const ctx = {
            keepUndefined,
            onAlias(source) {
                // These get fixed later in createNode()
                const alias = new Alias(source);
                aliasNodes.push(alias);
                return alias;
            },
            onTagObj,
            prevObjects: new Map(),
            replacer,
            schema: this.schema
        };
        const node = createNode(value, tag, ctx);
        for (const alias of aliasNodes) {
            // With circular references, the source node is only resolved after all of
            // its child nodes are. This is why anchors are set only after all of the
            // nodes have been created.
            alias.source = alias.source.node;
            let name = this.anchors.getName(alias.source);
            if (!name) {
                name = this.anchors.newName();
                this.anchors.map[name] = alias.source;
            }
        }
        if (flow && isCollection(node))
            node.flow = true;
        return node;
    }
    /**
     * Convert a key and a value into a `Pair` using the current schema,
     * recursively wrapping all values as `Scalar` or `Collection` nodes.
     */
    createPair(key, value, options = {}) {
        const k = this.createNode(key, options);
        const v = this.createNode(value, options);
        return new Pair(k, v);
    }
    /**
     * Removes a value from the document.
     * @returns `true` if the item was found and removed.
     */
    delete(key) {
        return assertCollection(this.contents) ? this.contents.delete(key) : false;
    }
    /**
     * Removes a value from the document.
     * @returns `true` if the item was found and removed.
     */
    deleteIn(path) {
        if (isEmptyPath(path)) {
            if (this.contents == null)
                return false;
            this.contents = null;
            return true;
        }
        return assertCollection(this.contents)
            ? this.contents.deleteIn(path)
            : false;
    }
    /**
     * Returns item at `key`, or `undefined` if not found. By default unwraps
     * scalar values from their surrounding node; to disable set `keepScalar` to
     * `true` (collections are always returned intact).
     */
    get(key, keepScalar) {
        return isCollection(this.contents)
            ? this.contents.get(key, keepScalar)
            : undefined;
    }
    /**
     * Returns item at `path`, or `undefined` if not found. By default unwraps
     * scalar values from their surrounding node; to disable set `keepScalar` to
     * `true` (collections are always returned intact).
     */
    getIn(path, keepScalar) {
        if (isEmptyPath(path))
            return !keepScalar && isScalar(this.contents)
                ? this.contents.value
                : this.contents;
        return isCollection(this.contents)
            ? this.contents.getIn(path, keepScalar)
            : undefined;
    }
    /**
     * Checks if the document includes a value with the key `key`.
     */
    has(key) {
        return isCollection(this.contents) ? this.contents.has(key) : false;
    }
    /**
     * Checks if the document includes a value at `path`.
     */
    hasIn(path) {
        if (isEmptyPath(path))
            return this.contents !== undefined;
        return isCollection(this.contents) ? this.contents.hasIn(path) : false;
    }
    /**
     * Sets a value in this document. For `!!set`, `value` needs to be a
     * boolean to add/remove the item from the set.
     */
    set(key, value) {
        if (this.contents == null) {
            this.contents = collectionFromPath(this.schema, [key], value);
        }
        else if (assertCollection(this.contents)) {
            this.contents.set(key, value);
        }
    }
    /**
     * Sets a value in this document. For `!!set`, `value` needs to be a
     * boolean to add/remove the item from the set.
     */
    setIn(path, value) {
        if (isEmptyPath(path))
            this.contents = value;
        else if (this.contents == null) {
            this.contents = collectionFromPath(this.schema, Array.from(path), value);
        }
        else if (assertCollection(this.contents)) {
            this.contents.setIn(path, value);
        }
    }
    /**
     * Change the YAML version and schema used by the document.
     *
     * Overrides all previously set schema options
     */
    setSchema(version, options) {
        let _options;
        switch (String(version)) {
            case '1.1':
                this.directives.yaml.version = '1.1';
                _options = Object.assign({ merge: true, resolveKnownTags: false, schema: 'yaml-1.1' }, options);
                break;
            case '1.2':
                this.directives.yaml.version = '1.2';
                _options = Object.assign({ merge: false, resolveKnownTags: true, schema: 'core' }, options);
                break;
            default: {
                const sv = JSON.stringify(version);
                throw new Error(`Expected '1.1' or '1.2' as version, but found: ${sv}`);
            }
        }
        this.schema = new Schema(_options);
    }
    // json & jsonArg are only used from toJSON()
    toJS({ json, jsonArg, mapAsMap, maxAliasCount, onAnchor, reviver } = {}) {
        const anchorNodes = Object.values(this.anchors.map).map(node => [node, { alias: [], aliasCount: 0, count: 1 }]);
        const anchors = anchorNodes.length > 0 ? new Map(anchorNodes) : null;
        const ctx = {
            anchors,
            doc: this,
            keep: !json,
            mapAsMap: mapAsMap === true,
            mapKeyWarned: false,
            maxAliasCount: typeof maxAliasCount === 'number' ? maxAliasCount : 100,
            stringify: stringify$1
        };
        const res = toJS(this.contents, jsonArg || '', ctx);
        if (typeof onAnchor === 'function' && anchors)
            for (const { count, res } of anchors.values())
                onAnchor(res, count);
        return typeof reviver === 'function'
            ? applyReviver(reviver, { '': res }, '', res)
            : res;
    }
    /**
     * A JSON representation of the document `contents`.
     *
     * @param jsonArg Used by `JSON.stringify` to indicate the array index or
     *   property name.
     */
    toJSON(jsonArg, onAnchor) {
        return this.toJS({ json: true, jsonArg, mapAsMap: false, onAnchor });
    }
    /** A YAML representation of the document. */
    toString(options = {}) {
        if (this.errors.length > 0)
            throw new Error('Document with errors cannot be stringified');
        if ('indent' in options &&
            (!Number.isInteger(options.indent) || Number(options.indent) <= 0)) {
            const s = JSON.stringify(options.indent);
            throw new Error(`"indent" option must be a positive integer, not ${s}`);
        }
        const lines = [];
        let hasDirectives = options.directives === true;
        if (options.directives !== false) {
            const dir = this.directives.toString(this);
            if (dir) {
                lines.push(dir);
                hasDirectives = true;
            }
            else if (this.directives.marker)
                hasDirectives = true;
        }
        if (hasDirectives)
            lines.push('---');
        if (this.commentBefore) {
            if (lines.length !== 1)
                lines.unshift('');
            lines.unshift(this.commentBefore.replace(/^/gm, '#'));
        }
        const ctx = createStringifyContext(this, options);
        let chompKeep = false;
        let contentComment = null;
        if (this.contents) {
            if (isNode(this.contents)) {
                if (this.contents.spaceBefore && hasDirectives)
                    lines.push('');
                if (this.contents.commentBefore)
                    lines.push(this.contents.commentBefore.replace(/^/gm, '#'));
                // top-level block scalars need to be indented if followed by a comment
                ctx.forceBlockIndent = !!this.comment;
                contentComment = this.contents.comment;
            }
            const onChompKeep = contentComment ? undefined : () => (chompKeep = true);
            let body = stringify$1(this.contents, ctx, () => (contentComment = null), onChompKeep);
            if (contentComment)
                body = addComment(body, '', contentComment);
            if ((body[0] === '|' || body[0] === '>') &&
                lines[lines.length - 1] === '---') {
                // Top-level block scalars with a preceding doc marker ought to use the
                // same line for their header.
                lines[lines.length - 1] = `--- ${body}`;
            }
            else
                lines.push(body);
        }
        else {
            lines.push(stringify$1(this.contents, ctx));
        }
        if (this.comment) {
            if ((!chompKeep || contentComment) && lines[lines.length - 1] !== '')
                lines.push('');
            lines.push(this.comment.replace(/^/gm, '#'));
        }
        return lines.join('\n') + '\n';
    }
}
function assertCollection(contents) {
    if (isCollection(contents))
        return true;
    throw new Error('Expected a YAML collection as document contents');
}

class YAMLError extends Error {
    constructor(name, offset, message) {
        if (!message)
            throw new Error(`Invalid arguments for new ${name}`);
        super();
        this.name = name;
        this.message = message;
        this.offset = offset;
    }
}
class YAMLParseError extends YAMLError {
    constructor(offset, message) {
        super('YAMLParseError', offset, message);
    }
}
class YAMLWarning extends YAMLError {
    constructor(offset, message) {
        super('YAMLWarning', offset, message);
    }
}
const prettifyError = (src, lc) => (error) => {
    if (error.offset === -1)
        return;
    error.linePos = lc.linePos(error.offset);
    const { line, col } = error.linePos;
    error.message += ` at line ${line}, column ${col}`;
    let ci = col - 1;
    let lineStr = src
        .substring(lc.lineStarts[line - 1], lc.lineStarts[line])
        .replace(/[\n\r]+$/, '');
    // Trim to max 80 chars, keeping col position near the middle
    if (ci >= 60 && lineStr.length > 80) {
        const trimStart = Math.min(ci - 39, lineStr.length - 79);
        lineStr = '…' + lineStr.substring(trimStart);
        ci -= trimStart - 1;
    }
    if (lineStr.length > 80)
        lineStr = lineStr.substring(0, 79) + '…';
    // Include previous line in context if pointing at line start
    if (line > 1 && /^ *$/.test(lineStr.substring(0, ci))) {
        // Regexp won't match if start is trimmed
        let prev = src.substring(lc.lineStarts[line - 2], lc.lineStarts[line - 1]);
        if (prev.length > 80)
            prev = prev.substring(0, 79) + '…\n';
        lineStr = prev + lineStr;
    }
    if (/[^ ]/.test(lineStr)) {
        const pointer = ' '.repeat(ci) + '^';
        error.message += `:\n\n${lineStr}\n${pointer}\n`;
    }
};

function resolveProps(doc, tokens, startOnNewline, indicator, offset, onError) {
    let length = 0;
    let spaceBefore = false;
    let atNewline = startOnNewline;
    let hasSpace = startOnNewline;
    let comment = '';
    let hasComment = false;
    let hasNewline = false;
    let sep = '';
    let anchor = '';
    let tagName = '';
    let found = null;
    let start = null;
    for (const token of tokens) {
        switch (token.type) {
            case 'space':
                // At the doc level, tabs at line start may be parsed as leading
                // white space rather than indentation.
                if (atNewline && indicator !== 'doc-start' && token.source[0] === '\t')
                    onError(offset + length, 'Tabs are not allowed as indentation');
                hasSpace = true;
                break;
            case 'comment': {
                if (doc.options.strict && !hasSpace)
                    onError(offset + length, 'Comments must be separated from other tokens by white space characters');
                const cb = token.source.substring(1);
                if (!hasComment)
                    comment = cb;
                else
                    comment += sep + cb;
                hasComment = true;
                sep = '';
                break;
            }
            case 'newline':
                if (atNewline && !hasComment)
                    spaceBefore = true;
                atNewline = true;
                hasNewline = true;
                hasSpace = true;
                sep += token.source;
                break;
            case 'anchor':
                if (anchor)
                    onError(offset + length, 'A node can have at most one anchor');
                anchor = token.source.substring(1);
                if (start === null)
                    start = offset + length;
                atNewline = false;
                hasSpace = false;
                break;
            case 'tag': {
                if (tagName)
                    onError(offset + length, 'A node can have at most one tag');
                const tn = doc.directives.tagName(token.source, msg => onError(offset, msg));
                if (tn)
                    tagName = tn;
                if (start === null)
                    start = offset + length;
                atNewline = false;
                hasSpace = false;
                break;
            }
            case indicator:
                // Could here handle preceding comments differently
                found = { indent: token.indent, offset: offset + length };
                atNewline = false;
                hasSpace = false;
                break;
            default:
                onError(offset + length, `Unexpected ${token.type} token`);
                atNewline = false;
                hasSpace = false;
        }
        /* istanbul ignore else should not happen */
        if (token.source)
            length += token.source.length;
    }
    return {
        found,
        spaceBefore,
        comment,
        hasNewline,
        anchor,
        tagName,
        length,
        start: start !== null && start !== void 0 ? start : offset + length
    };
}

function containsNewline(key) {
    if (!key)
        return null;
    switch (key.type) {
        case 'alias':
        case 'scalar':
        case 'double-quoted-scalar':
        case 'single-quoted-scalar':
            return key.source.includes('\n');
        case 'flow-collection':
            for (const token of key.items) {
                switch (token.type) {
                    case 'newline':
                        return true;
                    case 'alias':
                    case 'scalar':
                    case 'double-quoted-scalar':
                    case 'single-quoted-scalar':
                    case 'flow-collection':
                        if (containsNewline(token))
                            return true;
                        break;
                }
            }
            return false;
        default:
            return true;
    }
}

const startColMsg = 'All mapping items must start at the same column';
function resolveBlockMap({ composeNode, composeEmptyNode }, doc, { indent, items, offset }, anchor, onError) {
    var _a;
    const start = offset;
    const map = new YAMLMap(doc.schema);
    if (anchor)
        doc.anchors.setAnchor(map, anchor);
    for (const { start, key, sep, value } of items) {
        // key properties
        const keyProps = resolveProps(doc, start, true, 'explicit-key-ind', offset, onError);
        const implicitKey = !keyProps.found;
        if (implicitKey) {
            if (key) {
                if (key.type === 'block-seq')
                    onError(offset, 'A block sequence may not be used as an implicit map key');
                else if ('indent' in key && key.indent !== indent)
                    onError(offset, startColMsg);
            }
            if (!keyProps.anchor && !keyProps.tagName && !sep) {
                // TODO: assert being at last item?
                if (keyProps.comment) {
                    if (map.comment)
                        map.comment += '\n' + keyProps.comment;
                    else
                        map.comment = keyProps.comment;
                }
                continue;
            }
        }
        else if (((_a = keyProps.found) === null || _a === void 0 ? void 0 : _a.indent) !== indent)
            onError(offset, startColMsg);
        offset += keyProps.length;
        if (implicitKey && containsNewline(key))
            onError(offset, 'Implicit keys need to be on a single line');
        // key value
        const keyStart = offset;
        const keyNode = key
            ? composeNode(doc, key, keyProps, onError)
            : composeEmptyNode(doc, offset, start, null, keyProps, onError);
        offset = keyNode.range[1];
        // value properties
        const valueProps = resolveProps(doc, sep || [], !key || key.type === 'block-scalar', 'map-value-ind', offset, onError);
        offset += valueProps.length;
        if (valueProps.found) {
            if (implicitKey) {
                if ((value === null || value === void 0 ? void 0 : value.type) === 'block-map' && !valueProps.hasNewline)
                    onError(offset, 'Nested mappings are not allowed in compact mappings');
                if (doc.options.strict &&
                    keyProps.start < valueProps.found.offset - 1024)
                    onError(offset, 'The : indicator must be at most 1024 chars after the start of an implicit block mapping key');
            }
            // value value
            const valueNode = value
                ? composeNode(doc, value, valueProps, onError)
                : composeEmptyNode(doc, offset, sep, null, valueProps, onError);
            offset = valueNode.range[1];
            map.items.push(new Pair(keyNode, valueNode));
        }
        else {
            // key with no value
            if (implicitKey)
                onError(keyStart, 'Implicit map keys need to be followed by map values');
            if (valueProps.comment) {
                if (keyNode.comment)
                    keyNode.comment += '\n' + valueProps.comment;
                else
                    keyNode.comment = valueProps.comment;
            }
            map.items.push(new Pair(keyNode));
        }
    }
    map.range = [start, offset];
    return map;
}

function resolveBlockSeq({ composeNode, composeEmptyNode }, doc, { items, offset }, anchor, onError) {
    const start = offset;
    const seq = new YAMLSeq(doc.schema);
    if (anchor)
        doc.anchors.setAnchor(seq, anchor);
    for (const { start, value } of items) {
        const props = resolveProps(doc, start, true, 'seq-item-ind', offset, onError);
        offset += props.length;
        if (!props.found) {
            if (props.anchor || props.tagName || value) {
                const msg = value && value.type === 'block-seq'
                    ? 'All sequence items must start at the same column'
                    : 'Sequence item without - indicator';
                onError(offset, msg);
            }
            else {
                // TODO: assert being at last item?
                if (props.comment)
                    seq.comment = props.comment;
                continue;
            }
        }
        const node = value
            ? composeNode(doc, value, props, onError)
            : composeEmptyNode(doc, offset, start, null, props, onError);
        offset = node.range[1];
        seq.items.push(node);
    }
    seq.range = [start, offset];
    return seq;
}

function resolveEnd(end, offset, reqSpace, onError) {
    let comment = '';
    if (end) {
        let hasSpace = false;
        let hasComment = false;
        let sep = '';
        for (const { source, type } of end) {
            switch (type) {
                case 'space':
                    hasSpace = true;
                    break;
                case 'comment': {
                    if (reqSpace && !hasSpace)
                        onError(offset, 'Comments must be separated from other tokens by white space characters');
                    const cb = source.substring(1);
                    if (!hasComment)
                        comment = cb;
                    else
                        comment += sep + cb;
                    hasComment = true;
                    sep = '';
                    break;
                }
                case 'newline':
                    if (hasComment)
                        sep += source;
                    hasSpace = true;
                    break;
                default:
                    onError(offset, `Unexpected ${type} at node end`);
            }
            offset += source.length;
        }
    }
    return { comment, offset };
}

function resolveFlowCollection({ composeNode, composeEmptyNode }, doc, fc, _anchor, onError) {
    const isMap = fc.start.source === '{';
    const coll = isMap ? new YAMLMap(doc.schema) : new YAMLSeq(doc.schema);
    coll.flow = true;
    if (_anchor)
        doc.anchors.setAnchor(coll, _anchor);
    let key = null;
    let value = null;
    let spaceBefore = false;
    let comment = '';
    let hasSpace = false;
    let hasComment = false;
    let newlines = '';
    let anchor = '';
    let tagName = '';
    let offset = fc.offset + 1;
    let atLineStart = false;
    let atExplicitKey = false;
    let atValueEnd = false;
    let nlAfterValueInSeq = false;
    let seqKeyToken = null;
    function getProps() {
        const props = { spaceBefore, comment, anchor, tagName };
        spaceBefore = false;
        comment = '';
        hasComment = false;
        newlines = '';
        anchor = '';
        tagName = '';
        return props;
    }
    function addItem(pos) {
        if (value) {
            if (hasComment)
                value.comment = comment;
        }
        else {
            value = composeEmptyNode(doc, offset, fc.items, pos, getProps(), onError);
        }
        if (isMap || atExplicitKey) {
            coll.items.push(key ? new Pair(key, value) : new Pair(value));
        }
        else {
            const seq = coll;
            if (key) {
                const map = new YAMLMap(doc.schema);
                map.flow = true;
                map.items.push(new Pair(key, value));
                seq.items.push(map);
            }
            else
                seq.items.push(value);
        }
    }
    for (let i = 0; i < fc.items.length; ++i) {
        const token = fc.items[i];
        let isSourceToken = true;
        switch (token.type) {
            case 'space':
                hasSpace = true;
                break;
            case 'comment': {
                if (doc.options.strict && !hasSpace)
                    onError(offset, 'Comments must be separated from other tokens by white space characters');
                const cb = token.source.substring(1);
                if (!hasComment)
                    comment = cb;
                else
                    comment += newlines + cb;
                atLineStart = false;
                hasComment = true;
                newlines = '';
                break;
            }
            case 'newline':
                if (atLineStart && !hasComment)
                    spaceBefore = true;
                if (atValueEnd) {
                    if (hasComment) {
                        let node = coll.items[coll.items.length - 1];
                        if (isPair(node))
                            node = node.value || node.key;
                        /* istanbul ignore else should not happen */
                        if (isNode(node))
                            node.comment = comment;
                        else
                            onError(offset, 'Error adding trailing comment to node');
                        comment = '';
                        hasComment = false;
                    }
                    atValueEnd = false;
                }
                else {
                    newlines += token.source;
                    if (!isMap && !key && value)
                        nlAfterValueInSeq = true;
                }
                atLineStart = true;
                hasSpace = true;
                break;
            case 'anchor':
                if (anchor)
                    onError(offset, 'A node can have at most one anchor');
                anchor = token.source.substring(1);
                atLineStart = false;
                atValueEnd = false;
                hasSpace = false;
                break;
            case 'tag': {
                if (tagName)
                    onError(offset, 'A node can have at most one tag');
                const tn = doc.directives.tagName(token.source, m => onError(offset, m));
                if (tn)
                    tagName = tn;
                atLineStart = false;
                atValueEnd = false;
                hasSpace = false;
                break;
            }
            case 'explicit-key-ind':
                if (anchor || tagName)
                    onError(offset, 'Anchors and tags must be after the ? indicator');
                atExplicitKey = true;
                atLineStart = false;
                atValueEnd = false;
                hasSpace = false;
                break;
            case 'map-value-ind': {
                if (key) {
                    if (value) {
                        onError(offset, 'Missing {} around pair used as mapping key');
                        const map = new YAMLMap(doc.schema);
                        map.flow = true;
                        map.items.push(new Pair(key, value));
                        map.range = [key.range[0], value.range[1]];
                        key = map;
                        value = null;
                    } // else explicit key
                }
                else if (value) {
                    if (doc.options.strict) {
                        const slMsg = 'Implicit keys of flow sequence pairs need to be on a single line';
                        if (nlAfterValueInSeq)
                            onError(offset, slMsg);
                        else if (seqKeyToken) {
                            if (containsNewline(seqKeyToken))
                                onError(offset, slMsg);
                            const start = 'offset' in seqKeyToken && seqKeyToken.offset;
                            if (typeof start === 'number' && start < offset - 1024)
                                onError(offset, 'The : indicator must be at most 1024 chars after the start of an implicit flow sequence key');
                            seqKeyToken = null;
                        }
                    }
                    key = value;
                    value = null;
                }
                else {
                    key = composeEmptyNode(doc, offset, fc.items, i, getProps(), onError);
                }
                if (hasComment) {
                    key.comment = comment;
                    comment = '';
                    hasComment = false;
                }
                atExplicitKey = false;
                atValueEnd = false;
                hasSpace = false;
                break;
            }
            case 'comma':
                if (key || value || anchor || tagName || atExplicitKey)
                    addItem(i);
                else
                    onError(offset, `Unexpected , in flow ${isMap ? 'map' : 'sequence'}`);
                key = null;
                value = null;
                atExplicitKey = false;
                atValueEnd = true;
                hasSpace = false;
                nlAfterValueInSeq = false;
                seqKeyToken = null;
                break;
            case 'block-map':
            case 'block-seq':
                onError(offset, 'Block collections are not allowed within flow collections');
            // fallthrough
            default: {
                if (value)
                    onError(offset, 'Missing , between flow collection items');
                if (!isMap && !key && !atExplicitKey)
                    seqKeyToken = token;
                value = composeNode(doc, token, getProps(), onError);
                offset = value.range[1];
                atLineStart = false;
                isSourceToken = false;
                atValueEnd = false;
                hasSpace = false;
            }
        }
        if (isSourceToken)
            offset += token.source.length;
    }
    if (key || value || anchor || tagName || atExplicitKey)
        addItem(fc.items.length);
    const expectedEnd = isMap ? '}' : ']';
    const [ce, ...ee] = fc.end;
    if (!ce || ce.source !== expectedEnd) {
        const cs = isMap ? 'map' : 'sequence';
        onError(offset, `Expected flow ${cs} to end with ${expectedEnd}`);
    }
    if (ce)
        offset += ce.source.length;
    if (ee.length > 0) {
        const end = resolveEnd(ee, offset, doc.options.strict, onError);
        if (end.comment)
            coll.comment = comment;
        offset = end.offset;
    }
    coll.range = [fc.offset, offset];
    return coll;
}

function composeCollection(CN, doc, token, anchor, tagName, onError) {
    let coll;
    switch (token.type) {
        case 'block-map': {
            coll = resolveBlockMap(CN, doc, token, anchor, onError);
            break;
        }
        case 'block-seq': {
            coll = resolveBlockSeq(CN, doc, token, anchor, onError);
            break;
        }
        case 'flow-collection': {
            coll = resolveFlowCollection(CN, doc, token, anchor, onError);
            break;
        }
    }
    if (!tagName)
        return coll;
    // Cast needed due to: https://github.com/Microsoft/TypeScript/issues/3841
    const Coll = coll.constructor;
    if (tagName === '!' || tagName === Coll.tagName) {
        coll.tag = Coll.tagName;
        return coll;
    }
    const expType = isMap(coll) ? 'map' : 'seq';
    let tag = doc.schema.tags.find(t => t.collection === expType && t.tag === tagName);
    if (!tag) {
        const kt = doc.schema.knownTags[tagName];
        if (kt && kt.collection === expType) {
            doc.schema.tags.push(Object.assign({}, kt, { default: false }));
            tag = kt;
        }
        else {
            onError(coll.range[0], `Unresolved tag: ${tagName}`, true);
            coll.tag = tagName;
            return coll;
        }
    }
    const res = tag.resolve(coll, msg => onError(coll.range[0], msg), doc.options);
    const node = isNode(res)
        ? res
        : new Scalar(res);
    node.range = coll.range;
    node.tag = tagName;
    if (tag === null || tag === void 0 ? void 0 : tag.format)
        node.format = tag.format;
    return node;
}

function resolveBlockScalar(scalar, strict, onError) {
    const header = parseBlockScalarHeader(scalar, strict, onError);
    if (!header)
        return { value: '', type: null, comment: '', length: 0 };
    const type = header.mode === '>' ? Scalar.BLOCK_FOLDED : Scalar.BLOCK_LITERAL;
    const lines = scalar.source ? splitLines(scalar.source) : [];
    // determine the end of content & start of chomping
    let chompStart = lines.length;
    for (let i = lines.length - 1; i >= 0; --i) {
        const content = lines[i][1];
        if (content === '' || content === '\r')
            chompStart = i;
        else
            break;
    }
    // shortcut for empty contents
    if (!scalar.source || chompStart === 0) {
        const value = header.chomp === '+' ? lines.map(line => line[0]).join('\n') : '';
        let length = header.length;
        if (scalar.source)
            length += scalar.source.length;
        return { value, type, comment: header.comment, length };
    }
    // find the indentation level to trim from start
    let trimIndent = scalar.indent + header.indent;
    let offset = scalar.offset + header.length;
    let contentStart = 0;
    for (let i = 0; i < chompStart; ++i) {
        const [indent, content] = lines[i];
        if (content === '' || content === '\r') {
            if (header.indent === 0 && indent.length > trimIndent)
                trimIndent = indent.length;
        }
        else {
            if (indent.length < trimIndent) {
                const message = 'Block scalars with more-indented leading empty lines must use an explicit indentation indicator';
                onError(offset + indent.length, message);
            }
            if (header.indent === 0)
                trimIndent = indent.length;
            contentStart = i;
            break;
        }
        offset += indent.length + content.length + 1;
    }
    let value = '';
    let sep = '';
    let prevMoreIndented = false;
    // leading whitespace is kept intact
    for (let i = 0; i < contentStart; ++i)
        value += lines[i][0].slice(trimIndent) + '\n';
    for (let i = contentStart; i < chompStart; ++i) {
        let [indent, content] = lines[i];
        offset += indent.length + content.length + 1;
        const crlf = content[content.length - 1] === '\r';
        if (crlf)
            content = content.slice(0, -1);
        /* istanbul ignore if already caught in lexer */
        if (content && indent.length < trimIndent) {
            const src = header.indent
                ? 'explicit indentation indicator'
                : 'first line';
            const message = `Block scalar lines must not be less indented than their ${src}`;
            onError(offset - content.length - (crlf ? 2 : 1), message);
            indent = '';
        }
        if (type === Scalar.BLOCK_LITERAL) {
            value += sep + indent.slice(trimIndent) + content;
            sep = '\n';
        }
        else if (indent.length > trimIndent || content[0] === '\t') {
            // more-indented content within a folded block
            if (sep === ' ')
                sep = '\n';
            else if (!prevMoreIndented && sep === '\n')
                sep = '\n\n';
            value += sep + indent.slice(trimIndent) + content;
            sep = '\n';
            prevMoreIndented = true;
        }
        else if (content === '') {
            // empty line
            if (sep === '\n')
                value += '\n';
            else
                sep = '\n';
        }
        else {
            value += sep + content;
            sep = ' ';
            prevMoreIndented = false;
        }
    }
    switch (header.chomp) {
        case '-':
            break;
        case '+':
            for (let i = chompStart; i < lines.length; ++i)
                value += '\n' + lines[i][0].slice(trimIndent);
            if (value[value.length - 1] !== '\n')
                value += '\n';
            break;
        default:
            value += '\n';
    }
    return {
        value,
        type,
        comment: header.comment,
        length: header.length + scalar.source.length
    };
}
function parseBlockScalarHeader({ offset, props }, strict, onError) {
    /* istanbul ignore if should not happen */
    if (props[0].type !== 'block-scalar-header') {
        onError(offset, 'Block scalar header not found');
        return null;
    }
    const { source } = props[0];
    const mode = source[0];
    let indent = 0;
    let chomp = '';
    let error = -1;
    for (let i = 1; i < source.length; ++i) {
        const ch = source[i];
        if (!chomp && (ch === '-' || ch === '+'))
            chomp = ch;
        else {
            const n = Number(ch);
            if (!indent && n)
                indent = n;
            else if (error === -1)
                error = offset + i;
        }
    }
    if (error !== -1)
        onError(error, `Block scalar header includes extra characters: ${source}`);
    let hasSpace = false;
    let comment = '';
    let length = source.length;
    for (let i = 1; i < props.length; ++i) {
        const token = props[i];
        switch (token.type) {
            case 'space':
                hasSpace = true;
            // fallthrough
            case 'newline':
                length += token.source.length;
                break;
            case 'comment':
                if (strict && !hasSpace) {
                    const message = 'Comments must be separated from other tokens by white space characters';
                    onError(offset + length, message);
                }
                length += token.source.length;
                comment = token.source.substring(1);
                break;
            case 'error':
                onError(offset + length, token.message);
                length += token.source.length;
                break;
            /* istanbul ignore next should not happen */
            default: {
                const message = `Unexpected token in block scalar header: ${token.type}`;
                onError(offset + length, message);
                const ts = token.source;
                if (ts && typeof ts === 'string')
                    length += ts.length;
            }
        }
    }
    return { mode, indent, chomp, comment, length };
}
/** @returns Array of lines split up as `[indent, content]` */
function splitLines(source) {
    const split = source.split(/\n( *)/);
    const first = split[0];
    const m = first.match(/^( *)/);
    const line0 = m && m[1] ? [m[1], first.slice(m[1].length)] : ['', first];
    const lines = [line0];
    for (let i = 1; i < split.length; i += 2)
        lines.push([split[i], split[i + 1]]);
    return lines;
}

function resolveFlowScalar({ offset, type, source, end }, strict, onError) {
    let _type;
    let value;
    const _onError = (rel, msg) => onError(offset + rel, msg);
    switch (type) {
        case 'scalar':
            _type = Scalar.PLAIN;
            value = plainValue(source, _onError);
            break;
        case 'single-quoted-scalar':
            _type = Scalar.QUOTE_SINGLE;
            value = singleQuotedValue(source, _onError);
            break;
        case 'double-quoted-scalar':
            _type = Scalar.QUOTE_DOUBLE;
            value = doubleQuotedValue(source, _onError);
            break;
        /* istanbul ignore next should not happen */
        default:
            onError(offset, `Expected a flow scalar value, but found: ${type}`);
            return {
                value: '',
                type: null,
                comment: '',
                length: source.length
            };
    }
    const re = resolveEnd(end, 0, strict, _onError);
    return {
        value,
        type: _type,
        comment: re.comment,
        length: source.length + re.offset
    };
}
function plainValue(source, onError) {
    switch (source[0]) {
        /* istanbul ignore next should not happen */
        case '\t':
            onError(0, 'Plain value cannot start with a tab character');
            break;
        case '|':
        case '>': {
            const message = `Plain value cannot start with block scalar indicator ${source[0]}`;
            onError(0, message);
            break;
        }
        case '@':
        case '`': {
            const message = `Plain value cannot start with reserved character ${source[0]}`;
            onError(0, message);
            break;
        }
    }
    return foldLines(source.trim());
}
function singleQuotedValue(source, onError) {
    if (source[source.length - 1] !== "'" || source.length === 1)
        onError(source.length, "Missing closing 'quote");
    return foldLines(source.slice(1, -1)).replace(/''/g, "'");
}
function foldLines(source) {
    const lines = source.split(/[ \t]*\r?\n[ \t]*/);
    let res = lines[0];
    let sep = ' ';
    for (let i = 1; i < lines.length - 1; ++i) {
        const line = lines[i];
        if (line === '') {
            if (sep === '\n')
                res += sep;
            else
                sep = '\n';
        }
        else {
            res += sep + line;
            sep = ' ';
        }
    }
    if (lines.length > 1)
        res += sep + lines[lines.length - 1];
    return res;
}
function doubleQuotedValue(source, onError) {
    let res = '';
    for (let i = 1; i < source.length - 1; ++i) {
        const ch = source[i];
        if (ch === '\r' && source[i + 1] === '\n')
            continue;
        if (ch === '\n') {
            const { fold, offset } = foldNewline(source, i);
            res += fold;
            i = offset;
        }
        else if (ch === '\\') {
            let next = source[++i];
            const cc = escapeCodes[next];
            if (cc)
                res += cc;
            else if (next === '\n') {
                // skip escaped newlines, but still trim the following line
                next = source[i + 1];
                while (next === ' ' || next === '\t')
                    next = source[++i + 1];
            }
            else if (next === 'x' || next === 'u' || next === 'U') {
                const length = { x: 2, u: 4, U: 8 }[next];
                res += parseCharCode(source, i + 1, length, onError);
                i += length;
            }
            else {
                const raw = source.substr(i - 1, 2);
                onError(i - 1, `Invalid escape sequence ${raw}`);
                res += raw;
            }
        }
        else if (ch === ' ' || ch === '\t') {
            // trim trailing whitespace
            const wsStart = i;
            let next = source[i + 1];
            while (next === ' ' || next === '\t')
                next = source[++i + 1];
            if (next !== '\n')
                res += i > wsStart ? source.slice(wsStart, i + 1) : ch;
        }
        else {
            res += ch;
        }
    }
    if (source[source.length - 1] !== '"' || source.length === 1)
        onError(source.length, 'Missing closing "quote');
    return res;
}
/**
 * Fold a single newline into a space, multiple newlines to N - 1 newlines.
 * Presumes `source[offset] === '\n'`
 */
function foldNewline(source, offset) {
    let fold = '';
    let ch = source[offset + 1];
    while (ch === ' ' || ch === '\t' || ch === '\n' || ch === '\r') {
        if (ch === '\r' && source[offset + 2] !== '\n')
            break;
        if (ch === '\n')
            fold += '\n';
        offset += 1;
        ch = source[offset + 1];
    }
    if (!fold)
        fold = ' ';
    return { fold, offset };
}
const escapeCodes = {
    '0': '\0',
    a: '\x07',
    b: '\b',
    e: '\x1b',
    f: '\f',
    n: '\n',
    r: '\r',
    t: '\t',
    v: '\v',
    N: '\u0085',
    _: '\u00a0',
    L: '\u2028',
    P: '\u2029',
    ' ': ' ',
    '"': '"',
    '/': '/',
    '\\': '\\',
    '\t': '\t'
};
function parseCharCode(source, offset, length, onError) {
    const cc = source.substr(offset, length);
    const ok = cc.length === length && /^[0-9a-fA-F]+$/.test(cc);
    const code = ok ? parseInt(cc, 16) : NaN;
    if (isNaN(code)) {
        const raw = source.substr(offset - 2, length + 2);
        onError(offset - 2, `Invalid escape sequence ${raw}`);
        return raw;
    }
    return String.fromCodePoint(code);
}

function composeScalar(doc, token, anchor, tagName, onError) {
    const { offset } = token;
    const { value, type, comment, length } = token.type === 'block-scalar'
        ? resolveBlockScalar(token, doc.options.strict, onError)
        : resolveFlowScalar(token, doc.options.strict, onError);
    const tag = tagName
        ? findScalarTagByName(doc.schema, value, tagName, onError)
        : findScalarTagByTest(doc.schema, value, token.type === 'scalar');
    let scalar;
    try {
        const res = tag
            ? tag.resolve(value, msg => onError(offset, msg), doc.options)
            : value;
        scalar = isScalar(res) ? res : new Scalar(res);
    }
    catch (error) {
        onError(offset, error.message);
        scalar = new Scalar(value);
    }
    scalar.range = [offset, offset + length];
    scalar.source = value;
    if (type)
        scalar.type = type;
    if (tagName)
        scalar.tag = tagName;
    if (tag === null || tag === void 0 ? void 0 : tag.format)
        scalar.format = tag.format;
    if (comment)
        scalar.comment = comment;
    if (anchor)
        doc.anchors.setAnchor(scalar, anchor);
    return scalar;
}
const defaultScalarTag = (schema) => schema.tags.find(tag => !tag.collection && tag.tag === 'tag:yaml.org,2002:str');
function findScalarTagByName(schema, value, tagName, onError) {
    var _a;
    if (tagName === '!')
        return defaultScalarTag(schema); // non-specific tag
    const matchWithTest = [];
    for (const tag of schema.tags) {
        if (!tag.collection && tag.tag === tagName) {
            if (tag.default && tag.test)
                matchWithTest.push(tag);
            else
                return tag;
        }
    }
    for (const tag of matchWithTest)
        if ((_a = tag.test) === null || _a === void 0 ? void 0 : _a.test(value))
            return tag;
    const kt = schema.knownTags[tagName];
    if (kt && !kt.collection) {
        // Ensure that the known tag is available for stringifying,
        // but does not get used by default.
        schema.tags.push(Object.assign({}, kt, { default: false, test: undefined }));
        return kt;
    }
    onError(0, `Unresolved tag: ${tagName}`, tagName !== 'tag:yaml.org,2002:str');
    return defaultScalarTag(schema);
}
function findScalarTagByTest(schema, value, apply) {
    var _a;
    if (apply) {
        for (const tag of schema.tags) {
            if (tag.default && ((_a = tag.test) === null || _a === void 0 ? void 0 : _a.test(value)))
                return tag;
        }
    }
    return defaultScalarTag(schema);
}

function emptyScalarPosition(offset, before, pos) {
    if (before) {
        if (pos === null)
            pos = before.length;
        for (let i = pos - 1; i >= 0; --i) {
            let st = before[i];
            switch (st.type) {
                case 'space':
                case 'comment':
                case 'newline':
                    offset -= st.source.length;
                    continue;
            }
            // Technically, an empty scalar is immediately after the last non-empty
            // node, but it's more useful to place it after any whitespace.
            st = before[++i];
            while ((st === null || st === void 0 ? void 0 : st.type) === 'space') {
                offset += st.source.length;
                st = before[++i];
            }
            break;
        }
    }
    return offset;
}

const CN = { composeNode, composeEmptyNode };
function composeNode(doc, token, props, onError) {
    const { spaceBefore, comment, anchor, tagName } = props;
    let node;
    switch (token.type) {
        case 'alias':
            node = composeAlias(doc, token, onError);
            if (anchor || tagName)
                onError(token.offset, 'An alias node must not specify any properties');
            break;
        case 'scalar':
        case 'single-quoted-scalar':
        case 'double-quoted-scalar':
        case 'block-scalar':
            node = composeScalar(doc, token, anchor, tagName, onError);
            break;
        case 'block-map':
        case 'block-seq':
        case 'flow-collection':
            node = composeCollection(CN, doc, token, anchor, tagName, onError);
            break;
        default:
            console.log(token);
            throw new Error(`Unsupporten token type: ${token.type}`);
    }
    if (spaceBefore)
        node.spaceBefore = true;
    if (comment) {
        if (token.type === 'scalar' && token.source === '')
            node.comment = comment;
        else
            node.commentBefore = comment;
    }
    return node;
}
function composeEmptyNode(doc, offset, before, pos, { spaceBefore, comment, anchor, tagName }, onError) {
    const token = {
        type: 'scalar',
        offset: emptyScalarPosition(offset, before, pos),
        indent: -1,
        source: ''
    };
    const node = composeScalar(doc, token, anchor, tagName, onError);
    if (spaceBefore)
        node.spaceBefore = true;
    if (comment)
        node.comment = comment;
    return node;
}
function composeAlias(doc, { offset, source, end }, onError) {
    const name = source.substring(1);
    const src = doc.anchors.getNode(name);
    if (!src)
        onError(offset, `Aliased anchor not found: ${name}`);
    const alias = new Alias(src);
    const re = resolveEnd(end, offset + source.length, doc.options.strict, onError);
    alias.range = [offset, re.offset];
    if (re.comment)
        alias.comment = re.comment;
    return alias;
}

function composeDoc(options, directives, { offset, start, value, end }, onError) {
    const opts = Object.assign({ directives }, options);
    const doc = new Document(undefined, opts);
    const props = resolveProps(doc, start, true, 'doc-start', offset, onError);
    if (props.found)
        doc.directives.marker = true;
    doc.contents = value
        ? composeNode(doc, value, props, onError)
        : composeEmptyNode(doc, offset + props.length, start, null, props, onError);
    const re = resolveEnd(end, doc.contents.range[1], false, onError);
    if (re.comment)
        doc.comment = re.comment;
    doc.range = [offset, re.offset];
    return doc;
}

function parsePrelude(prelude) {
    let comment = '';
    let atComment = false;
    let afterEmptyLine = false;
    for (let i = 0; i < prelude.length; ++i) {
        const source = prelude[i];
        switch (source[0]) {
            case '#':
                comment +=
                    (comment === '' ? '' : afterEmptyLine ? '\n\n' : '\n') +
                        source.substring(1);
                atComment = true;
                afterEmptyLine = false;
                break;
            case '%':
                if (prelude[i + 1][0] !== '#')
                    i += 1;
                atComment = false;
                break;
            default:
                // This may be wrong after doc-end, but in that case it doesn't matter
                if (!atComment)
                    afterEmptyLine = true;
                atComment = false;
        }
    }
    return { comment, afterEmptyLine };
}
/**
 * Compose a stream of CST nodes into a stream of YAML Documents.
 *
 * ```ts
 * const options: Options = { ... }
 * const docs: Document.Parsed[] = []
 * const composer = new Composer(doc => docs.push(doc), options)
 * const parser = new Parser(composer.next)
 * parser.parse(source)
 * composer.end()
 * ```
 */
class Composer {
    constructor(onDocument, options = {}) {
        this.doc = null;
        this.atDirectives = false;
        this.prelude = [];
        this.errors = [];
        this.warnings = [];
        this.onError = (offset, message, warning) => {
            if (warning)
                this.warnings.push(new YAMLWarning(offset, message));
            else
                this.errors.push(new YAMLParseError(offset, message));
        };
        /**
         * Advance the composed by one CST token. Bound to the Composer
         * instance, so may be used directly as a callback function.
         */
        this.next = (token) => {
            switch (token.type) {
                case 'directive':
                    this.directives.add(token.source, this.onError);
                    this.prelude.push(token.source);
                    this.atDirectives = true;
                    break;
                case 'document': {
                    const doc = composeDoc(this.options, this.directives, token, this.onError);
                    this.decorate(doc, false);
                    if (this.doc)
                        this.onDocument(this.doc);
                    this.doc = doc;
                    this.atDirectives = false;
                    break;
                }
                case 'byte-order-mark':
                case 'space':
                    break;
                case 'comment':
                case 'newline':
                    this.prelude.push(token.source);
                    break;
                case 'error': {
                    const msg = token.source
                        ? `${token.message}: ${JSON.stringify(token.source)}`
                        : token.message;
                    const error = new YAMLParseError(-1, msg);
                    if (this.atDirectives || !this.doc)
                        this.errors.push(error);
                    else
                        this.doc.errors.push(error);
                    break;
                }
                case 'doc-end': {
                    if (!this.doc) {
                        const msg = 'Unexpected doc-end without preceding document';
                        this.errors.push(new YAMLParseError(token.offset, msg));
                        break;
                    }
                    const end = resolveEnd(token.end, token.offset + token.source.length, this.doc.options.strict, this.onError);
                    this.decorate(this.doc, true);
                    if (end.comment) {
                        const dc = this.doc.comment;
                        this.doc.comment = dc ? `${dc}\n${end.comment}` : end.comment;
                    }
                    this.doc.range[1] = end.offset;
                    break;
                }
                default:
                    this.errors.push(new YAMLParseError(-1, `Unsupported token ${token.type}`));
            }
        };
        this.directives = new Directives({
            version: (options === null || options === void 0 ? void 0 : options.version) || defaultOptions.version
        });
        this.onDocument = onDocument;
        this.options = options;
    }
    decorate(doc, afterDoc) {
        const { comment, afterEmptyLine } = parsePrelude(this.prelude);
        //console.log({ dc: doc.comment, prelude, comment })
        if (comment) {
            const dc = doc.contents;
            if (afterDoc) {
                doc.comment = doc.comment ? `${doc.comment}\n${comment}` : comment;
            }
            else if (afterEmptyLine || doc.directives.marker || !dc) {
                doc.commentBefore = comment;
            }
            else if (isCollection(dc) && !dc.flow && dc.items.length > 0) {
                const it = dc.items[0];
                const cb = it.commentBefore;
                it.commentBefore = cb ? `${comment}\n${cb}` : comment;
            }
            else {
                const cb = dc.commentBefore;
                dc.commentBefore = cb ? `${comment}\n${cb}` : comment;
            }
        }
        if (afterDoc) {
            Array.prototype.push.apply(doc.errors, this.errors);
            Array.prototype.push.apply(doc.warnings, this.warnings);
        }
        else {
            doc.errors = this.errors;
            doc.warnings = this.warnings;
        }
        this.prelude = [];
        this.errors = [];
        this.warnings = [];
    }
    /**
     * Current stream status information.
     *
     * Mostly useful at the end of input for an empty stream.
     */
    streamInfo() {
        return {
            comment: parsePrelude(this.prelude).comment,
            directives: this.directives,
            errors: this.errors,
            warnings: this.warnings
        };
    }
    end(forceDoc = false, offset = -1) {
        if (this.doc) {
            this.decorate(this.doc, true);
            this.onDocument(this.doc);
            this.doc = null;
        }
        else if (forceDoc) {
            const opts = Object.assign({ directives: this.directives }, this.options);
            const doc = new Document(undefined, opts);
            if (this.atDirectives)
                this.onError(offset, 'Missing directives-end indicator line');
            doc.range = [0, offset];
            this.decorate(doc, false);
            this.onDocument(doc);
        }
    }
}

/** The byte order mark */
const BOM = '\u{FEFF}';
/** Start of doc-mode */
const DOCUMENT = '\x02'; // C0: Start of Text
/** Unexpected end of flow-mode */
const FLOW_END = '\x18'; // C0: Cancel
/** Next token is a scalar value */
const SCALAR = '\x1f'; // C0: Unit Separator
/** Identify the type of a lexer token. May return `null` for unknown tokens. */
function tokenType(source) {
    switch (source) {
        case BOM:
            return 'byte-order-mark';
        case DOCUMENT:
            return 'doc-mode';
        case FLOW_END:
            return 'flow-error-end';
        case SCALAR:
            return 'scalar';
        case '---':
            return 'doc-start';
        case '...':
            return 'doc-end';
        case '':
        case '\n':
        case '\r\n':
            return 'newline';
        case '-':
            return 'seq-item-ind';
        case '?':
            return 'explicit-key-ind';
        case ':':
            return 'map-value-ind';
        case '{':
            return 'flow-map-start';
        case '}':
            return 'flow-map-end';
        case '[':
            return 'flow-seq-start';
        case ']':
            return 'flow-seq-end';
        case ',':
            return 'comma';
    }
    switch (source[0]) {
        case ' ':
        case '\t':
            return 'space';
        case '#':
            return 'comment';
        case '%':
            return 'directive-line';
        case '*':
            return 'alias';
        case '&':
            return 'anchor';
        case '!':
            return 'tag';
        case "'":
            return 'single-quoted-scalar';
        case '"':
            return 'double-quoted-scalar';
        case '|':
        case '>':
            return 'block-scalar-header';
    }
    return null;
}

/*
START -> stream

stream
  directive -> line-end -> stream
  indent + line-end -> stream
  [else] -> line-start

line-end
  comment -> line-end
  newline -> .
  input-end -> END

line-start
  doc-start -> doc
  doc-end -> stream
  [else] -> indent -> block-start

block-start
  seq-item-start -> block-start
  explicit-key-start -> block-start
  map-value-start -> block-start
  [else] -> doc

doc
  line-end -> line-start
  spaces -> doc
  anchor -> doc
  tag -> doc
  flow-start -> flow -> doc
  flow-end -> error -> doc
  seq-item-start -> error -> doc
  explicit-key-start -> error -> doc
  map-value-start -> doc
  alias -> doc
  quote-start -> quoted-scalar -> doc
  block-scalar-header -> line-end -> block-scalar(min) -> line-start
  [else] -> plain-scalar(false, min) -> doc

flow
  line-end -> flow
  spaces -> flow
  anchor -> flow
  tag -> flow
  flow-start -> flow -> flow
  flow-end -> .
  seq-item-start -> error -> flow
  explicit-key-start -> flow
  map-value-start -> flow
  alias -> flow
  quote-start -> quoted-scalar -> flow
  comma -> flow
  [else] -> plain-scalar(true, 0) -> flow

quoted-scalar
  quote-end -> .
  [else] -> quoted-scalar

block-scalar(min)
  newline + peek(indent < min) -> .
  [else] -> block-scalar(min)

plain-scalar(is-flow, min)
  scalar-end(is-flow) -> .
  peek(newline + (indent < min)) -> .
  [else] -> plain-scalar(min)
*/
function isEmpty(ch) {
    switch (ch) {
        case undefined:
        case ' ':
        case '\n':
        case '\r':
        case '\t':
            return true;
        default:
            return false;
    }
}
const invalidFlowScalarChars = [',', '[', ']', '{', '}'];
const invalidIdentifierChars = [' ', ',', '[', ']', '{', '}', '\n', '\r', '\t'];
const isNotIdentifierChar = (ch) => !ch || invalidIdentifierChars.includes(ch);
/**
 * Splits an input string into lexical tokens, i.e. smaller strings that are
 * easily identifiable by `tokens.tokenType()`.
 *
 * Lexing starts always in a "stream" context. Incomplete input may be buffered
 * until a complete token can be emitted.
 *
 * In addition to slices of the original input, the following control characters
 * may also be emitted:
 *
 * - `\x02` (Start of Text): A document starts with the next token
 * - `\x18` (Cancel): Unexpected end of flow-mode (indicates an error)
 * - `\x1f` (Unit Separator): Next token is a scalar value
 * - `\u{FEFF}` (Byte order mark): Emitted separately outside documents
 */
class Lexer {
    /**
     * Define/initialise a YAML lexer. `push` will be called separately with each
     * token when `lex()` is passed an input string.
     *
     * @public
     */
    constructor(push) {
        /**
         * Flag indicating whether the end of the current buffer marks the end of
         * all input
         */
        this.atEnd = false;
        /**
         * Explicit indent set in block scalar header, as an offset from the current
         * minimum indent, so e.g. set to 1 from a header `|2+`. Set to -1 if not
         * explicitly set.
         */
        this.blockScalarIndent = -1;
        /**
         * Block scalars that include a + (keep) chomping indicator in their header
         * include trailing empty lines, which are otherwise excluded from the
         * scalar's contents.
         */
        this.blockScalarKeep = false;
        /** Current input */
        this.buffer = '';
        /**
         * Flag noting whether the map value indicator : can immediately follow this
         * node within a flow context.
         */
        this.flowKey = false;
        /** Count of surrounding flow collection levels. */
        this.flowLevel = 0;
        /**
         * Minimum level of indentation required for next lines to be parsed as a
         * part of the current scalar value.
         */
        this.indentNext = 0;
        /** Indentation level of the current line. */
        this.indentValue = 0;
        /** Stores the state of the lexer if reaching the end of incpomplete input */
        this.next = null;
        /** A pointer to `buffer`; the current position of the lexer. */
        this.pos = 0;
        this.push = push;
    }
    /**
     * Read YAML tokens from the `source` string, calling the callback
     * defined in the constructor for each one. If `incomplete`, a part
     * of the last line may be left as a buffer for the next call.
     *
     * @public
     */
    lex(source, incomplete) {
        if (source)
            this.buffer = this.buffer ? this.buffer + source : source;
        this.atEnd = !incomplete;
        let next = this.next || 'stream';
        while (next && (incomplete || this.hasChars(1)))
            next = this.parseNext(next);
    }
    atLineEnd() {
        let i = this.pos;
        let ch = this.buffer[i];
        while (ch === ' ' || ch === '\t')
            ch = this.buffer[++i];
        if (!ch || ch === '#' || ch === '\n')
            return true;
        if (ch === '\r')
            return this.buffer[i + 1] === '\n';
        return false;
    }
    charAt(n) {
        return this.buffer[this.pos + n];
    }
    continueScalar(offset) {
        let ch = this.buffer[offset];
        if (this.indentNext > 0) {
            let indent = 0;
            while (ch === ' ')
                ch = this.buffer[++indent + offset];
            if (ch === '\r') {
                const next = this.buffer[indent + offset + 1];
                if (next === '\n' || (!next && !this.atEnd))
                    return offset + indent + 1;
            }
            return ch === '\n' || indent >= this.indentNext || (!ch && !this.atEnd)
                ? offset + indent
                : -1;
        }
        if (ch === '-' || ch === '.') {
            const dt = this.buffer.substr(offset, 3);
            if ((dt === '---' || dt === '...') && isEmpty(this.buffer[offset + 3]))
                return -1;
        }
        return offset;
    }
    getLine() {
        let end = this.buffer.indexOf('\n', this.pos);
        if (end === -1)
            return this.atEnd ? this.buffer.substring(this.pos) : null;
        if (this.buffer[end - 1] === '\r')
            end -= 1;
        return this.buffer.substring(this.pos, end);
    }
    hasChars(n) {
        return this.pos + n <= this.buffer.length;
    }
    setNext(state) {
        this.buffer = this.buffer.substring(this.pos);
        this.pos = 0;
        this.next = state;
        return null;
    }
    peek(n) {
        return this.buffer.substr(this.pos, n);
    }
    parseNext(next) {
        switch (next) {
            case 'stream':
                return this.parseStream();
            case 'line-start':
                return this.parseLineStart();
            case 'block-start':
                return this.parseBlockStart();
            case 'doc':
                return this.parseDocument();
            case 'flow':
                return this.parseFlowCollection();
            case 'quoted-scalar':
                return this.parseQuotedScalar();
            case 'block-scalar':
                return this.parseBlockScalar();
            case 'plain-scalar':
                return this.parsePlainScalar();
        }
    }
    parseStream() {
        let line = this.getLine();
        if (line === null)
            return this.setNext('stream');
        if (line[0] === BOM) {
            this.pushCount(1);
            line = line.substring(1);
        }
        if (line[0] === '%') {
            let dirEnd = line.length;
            const cs = line.indexOf('#');
            if (cs !== -1) {
                const ch = line[cs - 1];
                if (ch === ' ' || ch === '\t')
                    dirEnd = cs - 1;
            }
            while (true) {
                const ch = line[dirEnd - 1];
                if (ch === ' ' || ch === '\t')
                    dirEnd -= 1;
                else
                    break;
            }
            const n = this.pushCount(dirEnd) + this.pushSpaces(true);
            this.pushCount(line.length - n); // possible comment
            this.pushNewline();
            return 'stream';
        }
        if (this.atLineEnd()) {
            const sp = this.pushSpaces(true);
            this.pushCount(line.length - sp);
            this.pushNewline();
            return 'stream';
        }
        this.push(DOCUMENT);
        return this.parseLineStart();
    }
    parseLineStart() {
        const ch = this.charAt(0);
        if (!ch && !this.atEnd)
            return this.setNext('line-start');
        if (ch === '-' || ch === '.') {
            if (!this.atEnd && !this.hasChars(4))
                return this.setNext('line-start');
            const s = this.peek(3);
            if (s === '---' && isEmpty(this.charAt(3))) {
                this.pushCount(3);
                this.indentValue = 0;
                this.indentNext = 0;
                return 'doc';
            }
            else if (s === '...' && isEmpty(this.charAt(3))) {
                this.pushCount(3);
                return 'stream';
            }
        }
        this.indentValue = this.pushSpaces(false);
        if (this.indentNext > this.indentValue && !isEmpty(this.charAt(1)))
            this.indentNext = this.indentValue;
        return this.parseBlockStart();
    }
    parseBlockStart() {
        const [ch0, ch1] = this.peek(2);
        if (!ch1 && !this.atEnd)
            return this.setNext('block-start');
        if ((ch0 === '-' || ch0 === '?' || ch0 === ':') && isEmpty(ch1)) {
            const n = this.pushCount(1) + this.pushSpaces(true);
            this.indentNext = this.indentValue + 1;
            this.indentValue += n;
            return this.parseBlockStart();
        }
        return 'doc';
    }
    parseDocument() {
        this.pushSpaces(true);
        const line = this.getLine();
        if (line === null)
            return this.setNext('doc');
        let n = this.pushIndicators();
        switch (line[n]) {
            case '#':
                this.pushCount(line.length - n);
            // fallthrough
            case undefined:
                this.pushNewline();
                return this.parseLineStart();
            case '{':
            case '[':
                this.pushCount(1);
                this.flowKey = false;
                this.flowLevel = 1;
                return 'flow';
            case '}':
            case ']':
                // this is an error
                this.pushCount(1);
                return 'doc';
            case '*':
                this.pushUntil(isNotIdentifierChar);
                return 'doc';
            case '"':
            case "'":
                return this.parseQuotedScalar();
            case '|':
            case '>':
                n += this.parseBlockScalarHeader();
                n += this.pushSpaces(true);
                this.pushCount(line.length - n);
                this.pushNewline();
                return this.parseBlockScalar();
            default:
                return this.parsePlainScalar();
        }
    }
    parseFlowCollection() {
        let nl, sp;
        let indent = -1;
        do {
            nl = this.pushNewline();
            sp = this.pushSpaces(true);
            if (nl > 0)
                this.indentValue = indent = sp;
        } while (nl + sp > 0);
        const line = this.getLine();
        if (line === null)
            return this.setNext('flow');
        if ((indent !== -1 && indent < this.indentNext) ||
            (indent === 0 &&
                (line.startsWith('---') || line.startsWith('...')) &&
                isEmpty(line[3]))) {
            // Allowing for the terminal ] or } at the same (rather than greater)
            // indent level as the initial [ or { is technically invalid, but
            // failing here would be surprising to users.
            const atFlowEndMarker = indent === this.indentNext - 1 &&
                this.flowLevel === 1 &&
                (line[0] === ']' || line[0] === '}');
            if (!atFlowEndMarker) {
                // this is an error
                this.flowLevel = 0;
                this.push(FLOW_END);
                return this.parseLineStart();
            }
        }
        let n = 0;
        while (line[n] === ',')
            n += this.pushCount(1) + this.pushSpaces(true);
        n += this.pushIndicators();
        switch (line[n]) {
            case undefined:
                return 'flow';
            case '#':
                this.pushCount(line.length - n);
                return 'flow';
            case '{':
            case '[':
                this.pushCount(1);
                this.flowKey = false;
                this.flowLevel += 1;
                return 'flow';
            case '}':
            case ']':
                this.pushCount(1);
                this.flowKey = true;
                this.flowLevel -= 1;
                return this.flowLevel ? 'flow' : 'doc';
            case '*':
                this.pushUntil(isNotIdentifierChar);
                return 'flow';
            case '"':
            case "'":
                this.flowKey = true;
                return this.parseQuotedScalar();
            case ':': {
                const next = this.charAt(1);
                if (this.flowKey || isEmpty(next) || next === ',') {
                    this.pushCount(1);
                    this.pushSpaces(true);
                    return 'flow';
                }
            }
            // fallthrough
            default:
                this.flowKey = false;
                return this.parsePlainScalar();
        }
    }
    parseQuotedScalar() {
        const quote = this.charAt(0);
        let end = this.buffer.indexOf(quote, this.pos + 1);
        if (quote === "'") {
            while (end !== -1 && this.buffer[end + 1] === "'")
                end = this.buffer.indexOf("'", end + 2);
        }
        else {
            // double-quote
            while (end !== -1) {
                let n = 0;
                while (this.buffer[end - 1 - n] === '\\')
                    n += 1;
                if (n % 2 === 0)
                    break;
                end = this.buffer.indexOf('"', end + 1);
            }
        }
        let nl = this.buffer.indexOf('\n', this.pos);
        if (nl !== -1 && nl < end) {
            while (nl !== -1 && nl < end) {
                const cs = this.continueScalar(nl + 1);
                if (cs === -1)
                    break;
                nl = this.buffer.indexOf('\n', cs);
            }
            if (nl !== -1 && nl < end) {
                // this is an error caused by an unexpected unindent
                end = nl - 1;
            }
        }
        if (end === -1) {
            if (!this.atEnd)
                return this.setNext('quoted-scalar');
            end = this.buffer.length;
        }
        this.pushToIndex(end + 1, false);
        return this.flowLevel ? 'flow' : 'doc';
    }
    parseBlockScalarHeader() {
        this.blockScalarIndent = -1;
        this.blockScalarKeep = false;
        let i = this.pos;
        while (true) {
            const ch = this.buffer[++i];
            if (ch === '+')
                this.blockScalarKeep = true;
            else if (ch > '0' && ch <= '9')
                this.blockScalarIndent = Number(ch) - 1;
            else if (ch !== '-')
                break;
        }
        return this.pushUntil(ch => isEmpty(ch) || ch === '#');
    }
    parseBlockScalar() {
        let nl = this.pos - 1; // may be -1 if this.pos === 0
        let indent = 0;
        let ch;
        loop: for (let i = this.pos; (ch = this.buffer[i]); ++i) {
            switch (ch) {
                case ' ':
                    indent += 1;
                    break;
                case '\n':
                    nl = i;
                    indent = 0;
                    break;
                case '\r': {
                    const next = this.buffer[i + 1];
                    if (!next && !this.atEnd)
                        return this.setNext('block-scalar');
                    if (next === '\n')
                        break;
                } // fallthrough
                default:
                    break loop;
            }
        }
        if (!ch && !this.atEnd)
            return this.setNext('block-scalar');
        if (indent >= this.indentNext) {
            if (this.blockScalarIndent === -1)
                this.indentNext = indent;
            else
                this.indentNext += this.blockScalarIndent;
            do {
                const cs = this.continueScalar(nl + 1);
                if (cs === -1)
                    break;
                nl = this.buffer.indexOf('\n', cs);
            } while (nl !== -1);
            if (nl === -1) {
                if (!this.atEnd)
                    return this.setNext('block-scalar');
                nl = this.buffer.length;
            }
        }
        if (!this.blockScalarKeep) {
            do {
                let i = nl - 1;
                let ch = this.buffer[i];
                if (ch === '\r')
                    ch = this.buffer[--i];
                while (ch === ' ' || ch === '\t')
                    ch = this.buffer[--i];
                if (ch === '\n' && i >= this.pos)
                    nl = i;
                else
                    break;
            } while (true);
        }
        this.push(SCALAR);
        this.pushToIndex(nl + 1, true);
        return this.parseLineStart();
    }
    parsePlainScalar() {
        const inFlow = this.flowLevel > 0;
        let end = this.pos - 1;
        let i = this.pos - 1;
        let ch;
        while ((ch = this.buffer[++i])) {
            if (ch === ':') {
                const next = this.buffer[i + 1];
                if (isEmpty(next) || (inFlow && next === ','))
                    break;
                end = i;
            }
            else if (isEmpty(ch)) {
                const next = this.buffer[i + 1];
                if (next === '#' || (inFlow && invalidFlowScalarChars.includes(next)))
                    break;
                if (ch === '\r') {
                    if (next === '\n') {
                        i += 1;
                        ch = '\n';
                    }
                    else
                        end = i;
                }
                if (ch === '\n') {
                    const cs = this.continueScalar(i + 1);
                    if (cs === -1)
                        break;
                    i = Math.max(i, cs - 2); // to advance, but still account for ' #'
                }
            }
            else {
                if (inFlow && invalidFlowScalarChars.includes(ch))
                    break;
                end = i;
            }
        }
        if (!ch && !this.atEnd)
            return this.setNext('plain-scalar');
        this.push(SCALAR);
        this.pushToIndex(end + 1, true);
        return inFlow ? 'flow' : 'doc';
    }
    pushCount(n) {
        if (n > 0) {
            this.push(this.buffer.substr(this.pos, n));
            this.pos += n;
            return n;
        }
        return 0;
    }
    pushToIndex(i, allowEmpty) {
        const s = this.buffer.slice(this.pos, i);
        if (s) {
            this.push(s);
            this.pos += s.length;
            return s.length;
        }
        else if (allowEmpty)
            this.push('');
        return 0;
    }
    pushIndicators() {
        switch (this.charAt(0)) {
            case '!':
                if (this.charAt(1) === '<')
                    return (this.pushVerbatimTag() +
                        this.pushSpaces(true) +
                        this.pushIndicators());
            // fallthrough
            case '&':
                return (this.pushUntil(isNotIdentifierChar) +
                    this.pushSpaces(true) +
                    this.pushIndicators());
            case ':':
            case '?': // this is an error outside flow collections
            case '-': // this is an error
                if (isEmpty(this.charAt(1))) {
                    if (this.flowLevel === 0)
                        this.indentNext = this.indentValue + 1;
                    return (this.pushCount(1) + this.pushSpaces(true) + this.pushIndicators());
                }
        }
        return 0;
    }
    pushVerbatimTag() {
        let i = this.pos + 2;
        let ch = this.buffer[i];
        while (!isEmpty(ch) && ch !== '>')
            ch = this.buffer[++i];
        return this.pushToIndex(ch === '>' ? i + 1 : i, false);
    }
    pushNewline() {
        const ch = this.buffer[this.pos];
        if (ch === '\n')
            return this.pushCount(1);
        else if (ch === '\r' && this.charAt(1) === '\n')
            return this.pushCount(2);
        else
            return 0;
    }
    pushSpaces(allowTabs) {
        let i = this.pos - 1;
        let ch;
        do {
            ch = this.buffer[++i];
        } while (ch === ' ' || (allowTabs && ch === '\t'));
        const n = i - this.pos;
        if (n > 0) {
            this.push(this.buffer.substr(this.pos, n));
            this.pos = i;
        }
        return n;
    }
    pushUntil(test) {
        let i = this.pos;
        let ch = this.buffer[i];
        while (!test(ch))
            ch = this.buffer[++i];
        return this.pushToIndex(i, false);
    }
}

/**
 * Tracks newlines during parsing in order to provide an efficient API for
 * determining the one-indexed `{ line, col }` position for any offset
 * within the input.
 */
class LineCounter {
    constructor() {
        this.lineStarts = [];
        /**
         * Should be called in ascending order. Otherwise, call
         * `lineCounter.lineStarts.sort()` before calling `linePos()`.
         */
        this.addNewLine = (offset) => this.lineStarts.push(offset);
        /**
         * Performs a binary search and returns the 1-indexed { line, col }
         * position of `offset`. If `line === 0`, `addNewLine` has never been
         * called or `offset` is before the first known newline.
         */
        this.linePos = (offset) => {
            let low = 0;
            let high = this.lineStarts.length;
            while (low < high) {
                const mid = (low + high) >> 1; // Math.floor((low + high) / 2)
                if (this.lineStarts[mid] < offset)
                    low = mid + 1;
                else
                    high = mid;
            }
            if (this.lineStarts[low] === offset)
                return { line: low + 1, col: 1 };
            if (low === 0)
                return { line: 0, col: offset };
            const start = this.lineStarts[low - 1];
            return { line: low, col: offset - start + 1 };
        };
    }
}

function includesToken(list, type) {
    for (let i = 0; i < list.length; ++i)
        if (list[i].type === type)
            return true;
    return false;
}
function includesNonEmpty(list) {
    for (let i = 0; i < list.length; ++i) {
        switch (list[i].type) {
            case 'space':
            case 'comment':
            case 'newline':
                break;
            default:
                return true;
        }
    }
    return false;
}
function atFirstEmptyLineAfterComments(start) {
    let hasComment = false;
    for (let i = 0; i < start.length; ++i) {
        switch (start[i].type) {
            case 'space':
                break;
            case 'comment':
                hasComment = true;
                break;
            case 'newline':
                if (!hasComment)
                    return false;
                break;
            default:
                return false;
        }
    }
    if (hasComment) {
        for (let i = start.length - 1; i >= 0; --i) {
            switch (start[i].type) {
                /* istanbul ignore next */
                case 'space':
                    break;
                case 'newline':
                    return true;
                default:
                    return false;
            }
        }
    }
    return false;
}
function isFlowToken(token) {
    switch (token === null || token === void 0 ? void 0 : token.type) {
        case 'alias':
        case 'scalar':
        case 'single-quoted-scalar':
        case 'double-quoted-scalar':
        case 'flow-collection':
            return true;
        default:
            return false;
    }
}
function getPrevProps(parent) {
    switch (parent.type) {
        case 'document':
            return parent.start;
        case 'block-map': {
            const it = parent.items[parent.items.length - 1];
            return it.sep || it.start;
        }
        case 'block-seq':
            return parent.items[parent.items.length - 1].start;
        /* istanbul ignore next should not happen */
        default:
            return [];
    }
}
/** Note: May modify input array */
function getFirstKeyStartProps(prev) {
    var _a;
    if (prev.length === 0)
        return [];
    let i = prev.length;
    loop: while (--i >= 0) {
        switch (prev[i].type) {
            case 'explicit-key-ind':
            case 'map-value-ind':
            case 'seq-item-ind':
            case 'newline':
                break loop;
        }
    }
    while (((_a = prev[++i]) === null || _a === void 0 ? void 0 : _a.type) === 'space') {
        /* loop */
    }
    return prev.splice(i, prev.length);
}
/**
 * A YAML concrete syntax tree (CST) parser
 *
 * While the `parse()` method provides an API for parsing a source string
 * directly, the parser may also be used with a user-provided lexer:
 *
 * ```ts
 * const cst: Token[] = []
 * const parser = new Parser(tok => cst.push(tok))
 * const src: string = ...
 *
 * // The following would be equivalent to `parser.parse(src, false)`
 * const lexer = new Lexer(parser.next)
 * lexer.lex(src, false)
 * parser.end()
 * ```
 */
class Parser {
    /**
     * @param push - Called separately with each parsed token
     * @param onNewLine - If defined, called separately with the start position of
     *   each new line (in `parse()`, including the start of input).
     * @public
     */
    constructor(push, onNewLine) {
        /** If true, space and sequence indicators count as indentation */
        this.atNewLine = true;
        /** If true, next token is a scalar value */
        this.atScalar = false;
        /** Current indentation level */
        this.indent = 0;
        /** Current offset since the start of parsing */
        this.offset = 0;
        /** On the same line with a block map key */
        this.onKeyLine = false;
        /** Top indicates the node that's currently being built */
        this.stack = [];
        /** The source of the current token, set in parse() */
        this.source = '';
        /** The type of the current token, set in parse() */
        this.type = '';
        /**
         * Advance the parser by the `source` of one lexical token. Bound to the
         * Parser instance, so may be used directly as a callback function.
         */
        this.next = (source) => {
            this.source = source;
            if (this.atScalar) {
                this.atScalar = false;
                this.step();
                this.offset += source.length;
                return;
            }
            const type = tokenType(source);
            if (!type) {
                const message = `Not a YAML token: ${source}`;
                this.pop({ type: 'error', offset: this.offset, message, source });
                this.offset += source.length;
            }
            else if (type === 'scalar') {
                this.atNewLine = false;
                this.atScalar = true;
                this.type = 'scalar';
            }
            else {
                this.type = type;
                this.step();
                switch (type) {
                    case 'newline':
                        this.atNewLine = true;
                        this.indent = 0;
                        if (this.onNewLine)
                            this.onNewLine(this.offset + source.length);
                        break;
                    case 'space':
                        if (this.atNewLine && source[0] === ' ')
                            this.indent += source.length;
                        break;
                    case 'explicit-key-ind':
                    case 'map-value-ind':
                    case 'seq-item-ind':
                        if (this.atNewLine)
                            this.indent += source.length;
                        break;
                    case 'doc-mode':
                        return;
                    default:
                        this.atNewLine = false;
                }
                this.offset += source.length;
            }
        };
        // Must be defined after `next()`
        this.lexer = new Lexer(this.next);
        this.push = push;
        this.onNewLine = onNewLine;
    }
    /**
     * Parse `source` as a YAML stream, calling `push` with each directive,
     * document and other structure as it is completely parsed. If `incomplete`,
     * a part of the last line may be left as a buffer for the next call.
     *
     * Errors are not thrown, but pushed out as `{ type: 'error', message }` tokens.
     * @public
     */
    parse(source, incomplete = false) {
        if (this.onNewLine && this.offset === 0)
            this.onNewLine(0);
        this.lexer.lex(source, incomplete);
        if (!incomplete)
            this.end();
    }
    /** Call at end of input to push out any remaining constructions */
    end() {
        while (this.stack.length > 0)
            this.pop();
    }
    get sourceToken() {
        return {
            type: this.type,
            indent: this.indent,
            source: this.source
        };
    }
    step() {
        const top = this.peek(1);
        if (this.type === 'doc-end' && (!top || top.type !== 'doc-end')) {
            while (this.stack.length > 0)
                this.pop();
            this.stack.push({
                type: 'doc-end',
                offset: this.offset,
                source: this.source
            });
            return;
        }
        if (!top)
            return this.stream();
        switch (top.type) {
            case 'document':
                return this.document(top);
            case 'alias':
            case 'scalar':
            case 'single-quoted-scalar':
            case 'double-quoted-scalar':
                return this.scalar(top);
            case 'block-scalar':
                return this.blockScalar(top);
            case 'block-map':
                return this.blockMap(top);
            case 'block-seq':
                return this.blockSequence(top);
            case 'flow-collection':
                return this.flowCollection(top);
            case 'doc-end':
                return this.documentEnd(top);
        }
        /* istanbul ignore next should not happen */
        this.pop();
    }
    peek(n) {
        return this.stack[this.stack.length - n];
    }
    pop(error) {
        const token = error || this.stack.pop();
        /* istanbul ignore if should not happen */
        if (!token) {
            const message = 'Tried to pop an empty stack';
            this.push({ type: 'error', source: '', message });
        }
        else if (this.stack.length === 0) {
            this.push(token);
        }
        else {
            const top = this.peek(1);
            // For these, parent indent is needed instead of own
            if (token.type === 'block-scalar' || token.type === 'flow-collection')
                token.indent = 'indent' in top ? top.indent : -1;
            switch (top.type) {
                case 'document':
                    top.value = token;
                    break;
                case 'block-scalar':
                    top.props.push(token); // error
                    break;
                case 'block-map': {
                    const it = top.items[top.items.length - 1];
                    if (it.value) {
                        top.items.push({ start: [], key: token, sep: [] });
                        this.onKeyLine = true;
                        return;
                    }
                    else if (it.sep) {
                        it.value = token;
                    }
                    else {
                        Object.assign(it, { key: token, sep: [] });
                        this.onKeyLine = !includesToken(it.start, 'explicit-key-ind');
                        return;
                    }
                    break;
                }
                case 'block-seq': {
                    const it = top.items[top.items.length - 1];
                    if (it.value)
                        top.items.push({ start: [], value: token });
                    else
                        it.value = token;
                    break;
                }
                case 'flow-collection':
                    top.items.push(token);
                    break;
                /* istanbul ignore next should not happen */
                default:
                    this.pop();
                    this.pop(token);
            }
            if ((top.type === 'document' ||
                top.type === 'block-map' ||
                top.type === 'block-seq') &&
                (token.type === 'block-map' || token.type === 'block-seq')) {
                const last = token.items[token.items.length - 1];
                if (last &&
                    !last.sep &&
                    !last.value &&
                    last.start.length > 0 &&
                    !includesNonEmpty(last.start) &&
                    (token.indent === 0 ||
                        last.start.every(st => st.type !== 'comment' || st.indent < token.indent))) {
                    if (top.type === 'document')
                        top.end = last.start;
                    else
                        top.items.push({ start: last.start });
                    token.items.splice(-1, 1);
                }
            }
        }
    }
    stream() {
        switch (this.type) {
            case 'directive-line':
                this.push({ type: 'directive', source: this.source });
                return;
            case 'byte-order-mark':
            case 'space':
            case 'comment':
            case 'newline':
                this.push(this.sourceToken);
                return;
            case 'doc-mode':
            case 'doc-start': {
                const doc = {
                    type: 'document',
                    offset: this.offset,
                    start: []
                };
                if (this.type === 'doc-start')
                    doc.start.push(this.sourceToken);
                this.stack.push(doc);
                return;
            }
        }
        this.push({
            type: 'error',
            offset: this.offset,
            message: `Unexpected ${this.type} token in YAML stream`,
            source: this.source
        });
    }
    document(doc) {
        if (doc.value)
            return this.lineEnd(doc);
        switch (this.type) {
            case 'doc-start': {
                if (includesNonEmpty(doc.start)) {
                    this.pop();
                    this.step();
                }
                else
                    doc.start.push(this.sourceToken);
                return;
            }
            case 'anchor':
            case 'tag':
            case 'space':
            case 'comment':
            case 'newline':
                doc.start.push(this.sourceToken);
                return;
        }
        const bv = this.startBlockValue(doc);
        if (bv)
            this.stack.push(bv);
        else {
            this.push({
                type: 'error',
                offset: this.offset,
                message: `Unexpected ${this.type} token in YAML document`,
                source: this.source
            });
        }
    }
    scalar(scalar) {
        if (this.type === 'map-value-ind') {
            const prev = getPrevProps(this.peek(2));
            const start = getFirstKeyStartProps(prev);
            let sep;
            if (scalar.end) {
                sep = scalar.end;
                sep.push(this.sourceToken);
                delete scalar.end;
            }
            else
                sep = [this.sourceToken];
            const map = {
                type: 'block-map',
                offset: scalar.offset,
                indent: scalar.indent,
                items: [{ start, key: scalar, sep }]
            };
            this.onKeyLine = true;
            this.stack[this.stack.length - 1] = map;
        }
        else
            this.lineEnd(scalar);
    }
    blockScalar(scalar) {
        switch (this.type) {
            case 'space':
            case 'comment':
            case 'newline':
                scalar.props.push(this.sourceToken);
                return;
            case 'scalar':
                scalar.source = this.source;
                // block-scalar source includes trailing newline
                this.atNewLine = true;
                this.indent = 0;
                if (this.onNewLine) {
                    let nl = this.source.indexOf('\n') + 1;
                    while (nl !== 0) {
                        this.onNewLine(this.offset + nl);
                        nl = this.source.indexOf('\n', nl) + 1;
                    }
                }
                this.pop();
                break;
            /* istanbul ignore next should not happen */
            default:
                this.pop();
                this.step();
        }
    }
    blockMap(map) {
        var _a;
        const it = map.items[map.items.length - 1];
        // it.sep is true-ish if pair already has key or : separator
        switch (this.type) {
            case 'newline':
                this.onKeyLine = false;
                if (!it.sep && atFirstEmptyLineAfterComments(it.start)) {
                    const prev = map.items[map.items.length - 2];
                    const end = (_a = prev === null || prev === void 0 ? void 0 : prev.value) === null || _a === void 0 ? void 0 : _a.end;
                    if (Array.isArray(end)) {
                        Array.prototype.push.apply(end, it.start);
                        it.start = [this.sourceToken];
                        return;
                    }
                }
            // fallthrough
            case 'space':
            case 'comment':
                if (it.value)
                    map.items.push({ start: [this.sourceToken] });
                else if (it.sep)
                    it.sep.push(this.sourceToken);
                else
                    it.start.push(this.sourceToken);
                return;
        }
        if (this.indent >= map.indent) {
            const atNextItem = !this.onKeyLine &&
                this.indent === map.indent &&
                (it.sep || includesNonEmpty(it.start));
            switch (this.type) {
                case 'anchor':
                case 'tag':
                    if (atNextItem || it.value) {
                        map.items.push({ start: [this.sourceToken] });
                        this.onKeyLine = true;
                    }
                    else if (it.sep)
                        it.sep.push(this.sourceToken);
                    else
                        it.start.push(this.sourceToken);
                    return;
                case 'explicit-key-ind':
                    if (!it.sep && !includesToken(it.start, 'explicit-key-ind'))
                        it.start.push(this.sourceToken);
                    else if (atNextItem || it.value)
                        map.items.push({ start: [this.sourceToken] });
                    else
                        this.stack.push({
                            type: 'block-map',
                            offset: this.offset,
                            indent: this.indent,
                            items: [{ start: [this.sourceToken] }]
                        });
                    this.onKeyLine = true;
                    return;
                case 'map-value-ind':
                    if (!it.sep)
                        Object.assign(it, { key: null, sep: [this.sourceToken] });
                    else if (it.value ||
                        (atNextItem && !includesToken(it.start, 'explicit-key-ind')))
                        map.items.push({ start: [], key: null, sep: [this.sourceToken] });
                    else if (includesToken(it.sep, 'map-value-ind'))
                        this.stack.push({
                            type: 'block-map',
                            offset: this.offset,
                            indent: this.indent,
                            items: [{ start: [], key: null, sep: [this.sourceToken] }]
                        });
                    else if (includesToken(it.start, 'explicit-key-ind') &&
                        isFlowToken(it.key) &&
                        !includesToken(it.sep, 'newline')) {
                        const start = getFirstKeyStartProps(it.start);
                        const key = it.key;
                        const sep = it.sep;
                        sep.push(this.sourceToken);
                        // @ts-ignore type guard is wrong here
                        delete it.key, delete it.sep;
                        this.stack.push({
                            type: 'block-map',
                            offset: this.offset,
                            indent: this.indent,
                            items: [{ start, key, sep }]
                        });
                    }
                    else
                        it.sep.push(this.sourceToken);
                    this.onKeyLine = true;
                    return;
                case 'alias':
                case 'scalar':
                case 'single-quoted-scalar':
                case 'double-quoted-scalar': {
                    const fs = this.flowScalar(this.type);
                    if (atNextItem || it.value) {
                        map.items.push({ start: [], key: fs, sep: [] });
                        this.onKeyLine = true;
                    }
                    else if (it.sep) {
                        this.stack.push(fs);
                    }
                    else {
                        Object.assign(it, { key: fs, sep: [] });
                        this.onKeyLine = true;
                    }
                    return;
                }
                default: {
                    const bv = this.startBlockValue(map);
                    if (bv) {
                        if (atNextItem &&
                            bv.type !== 'block-seq' &&
                            includesToken(it.start, 'explicit-key-ind'))
                            map.items.push({ start: [] });
                        this.stack.push(bv);
                        return;
                    }
                }
            }
        }
        this.pop();
        this.step();
    }
    blockSequence(seq) {
        var _a;
        const it = seq.items[seq.items.length - 1];
        switch (this.type) {
            case 'newline':
                if (!it.value && atFirstEmptyLineAfterComments(it.start)) {
                    const prev = seq.items[seq.items.length - 2];
                    const end = (_a = prev === null || prev === void 0 ? void 0 : prev.value) === null || _a === void 0 ? void 0 : _a.end;
                    if (Array.isArray(end)) {
                        Array.prototype.push.apply(end, it.start);
                        it.start = [this.sourceToken];
                        return;
                    }
                }
            // fallthrough
            case 'space':
            case 'comment':
                if (it.value)
                    seq.items.push({ start: [this.sourceToken] });
                else
                    it.start.push(this.sourceToken);
                return;
            case 'anchor':
            case 'tag':
                if (it.value || this.indent <= seq.indent)
                    break;
                it.start.push(this.sourceToken);
                return;
            case 'seq-item-ind':
                if (this.indent !== seq.indent)
                    break;
                if (it.value || includesToken(it.start, 'seq-item-ind'))
                    seq.items.push({ start: [this.sourceToken] });
                else
                    it.start.push(this.sourceToken);
                return;
        }
        if (this.indent > seq.indent) {
            const bv = this.startBlockValue(seq);
            if (bv)
                return this.stack.push(bv);
        }
        this.pop();
        this.step();
    }
    flowCollection(fc) {
        if (this.type === 'flow-error-end') {
            let top;
            do {
                this.pop();
                top = this.peek(1);
            } while (top && top.type === 'flow-collection');
        }
        else if (fc.end.length === 0) {
            switch (this.type) {
                case 'space':
                case 'comment':
                case 'newline':
                case 'comma':
                case 'explicit-key-ind':
                case 'map-value-ind':
                case 'anchor':
                case 'tag':
                    fc.items.push(this.sourceToken);
                    return;
                case 'alias':
                case 'scalar':
                case 'single-quoted-scalar':
                case 'double-quoted-scalar':
                    fc.items.push(this.flowScalar(this.type));
                    return;
                case 'flow-map-end':
                case 'flow-seq-end':
                    fc.end.push(this.sourceToken);
                    return;
            }
            const bv = this.startBlockValue(fc);
            /* istanbul ignore else should not happen */
            if (bv)
                return this.stack.push(bv);
            else {
                this.pop();
                this.step();
            }
        }
        else {
            const parent = this.peek(2);
            if (parent.type === 'block-map' &&
                (this.type === 'map-value-ind' ||
                    (this.type === 'newline' &&
                        !parent.items[parent.items.length - 1].sep))) {
                this.pop();
                this.step();
            }
            else if (this.type === 'map-value-ind' &&
                parent.type !== 'flow-collection') {
                const prev = getPrevProps(parent);
                const start = getFirstKeyStartProps(prev);
                const sep = fc.end.splice(1, fc.end.length);
                sep.push(this.sourceToken);
                const map = {
                    type: 'block-map',
                    offset: fc.offset,
                    indent: fc.indent,
                    items: [{ start, key: fc, sep }]
                };
                this.onKeyLine = true;
                this.stack[this.stack.length - 1] = map;
            }
            else {
                this.lineEnd(fc);
            }
        }
    }
    flowScalar(type) {
        if (this.onNewLine) {
            let nl = this.source.indexOf('\n') + 1;
            while (nl !== 0) {
                this.onNewLine(this.offset + nl);
                nl = this.source.indexOf('\n', nl) + 1;
            }
        }
        return {
            type,
            offset: this.offset,
            indent: this.indent,
            source: this.source
        };
    }
    startBlockValue(parent) {
        switch (this.type) {
            case 'alias':
            case 'scalar':
            case 'single-quoted-scalar':
            case 'double-quoted-scalar':
                return this.flowScalar(this.type);
            case 'block-scalar-header':
                return {
                    type: 'block-scalar',
                    offset: this.offset,
                    indent: this.indent,
                    props: [this.sourceToken]
                };
            case 'flow-map-start':
            case 'flow-seq-start':
                return {
                    type: 'flow-collection',
                    offset: this.offset,
                    indent: this.indent,
                    start: this.sourceToken,
                    items: [],
                    end: []
                };
            case 'seq-item-ind':
                return {
                    type: 'block-seq',
                    offset: this.offset,
                    indent: this.indent,
                    items: [{ start: [this.sourceToken] }]
                };
            case 'explicit-key-ind':
                this.onKeyLine = true;
                return {
                    type: 'block-map',
                    offset: this.offset,
                    indent: this.indent,
                    items: [{ start: [this.sourceToken] }]
                };
            case 'map-value-ind': {
                this.onKeyLine = true;
                const prev = getPrevProps(parent);
                const start = getFirstKeyStartProps(prev);
                return {
                    type: 'block-map',
                    offset: this.offset,
                    indent: this.indent,
                    items: [{ start, key: null, sep: [this.sourceToken] }]
                };
            }
        }
        return null;
    }
    documentEnd(docEnd) {
        if (this.type !== 'doc-mode') {
            if (docEnd.end)
                docEnd.end.push(this.sourceToken);
            else
                docEnd.end = [this.sourceToken];
            if (this.type === 'newline')
                this.pop();
        }
    }
    lineEnd(token) {
        switch (this.type) {
            case 'comma':
            case 'doc-start':
            case 'doc-end':
            case 'flow-seq-end':
            case 'flow-map-end':
            case 'map-value-ind':
                this.pop();
                this.step();
                break;
            case 'newline':
                this.onKeyLine = false;
            // fallthrough
            case 'space':
            case 'comment':
            default:
                // all other values are errors
                if (token.end)
                    token.end.push(this.sourceToken);
                else
                    token.end = [this.sourceToken];
                if (this.type === 'newline')
                    this.pop();
        }
    }
}

function parseOptions(options) {
    const prettyErrors = !options || options.prettyErrors !== false;
    const lineCounter = (options && options.lineCounter) ||
        (prettyErrors && new LineCounter()) ||
        null;
    return { lineCounter, prettyErrors };
}
/** Parse an input string into a single YAML.Document */
function parseDocument(source, options) {
    const { lineCounter, prettyErrors } = parseOptions(options);
    // `doc` is always set by compose.end(true) at the very latest
    let doc = null;
    const composer = new Composer(_doc => {
        if (!doc)
            doc = _doc;
        else if (doc.options.logLevel !== 'silent') {
            const errMsg = 'Source contains multiple documents; please use YAML.parseAllDocuments()';
            doc.errors.push(new YAMLParseError(_doc.range[0], errMsg));
        }
    }, options);
    const parser = new Parser(composer.next, lineCounter === null || lineCounter === void 0 ? void 0 : lineCounter.addNewLine);
    parser.parse(source);
    composer.end(true, source.length);
    if (prettyErrors && lineCounter) {
        doc.errors.forEach(prettifyError(source, lineCounter));
        doc.warnings.forEach(prettifyError(source, lineCounter));
    }
    return doc;
}
function parse$1(src, reviver, options) {
    let _reviver = undefined;
    if (typeof reviver === 'function') {
        _reviver = reviver;
    }
    else if (options === undefined && reviver && typeof reviver === 'object') {
        options = reviver;
    }
    const doc = parseDocument(src, options);
    if (!doc)
        return null;
    doc.warnings.forEach(warning => warn(doc.options.logLevel, warning));
    if (doc.errors.length > 0) {
        if (doc.options.logLevel !== 'silent')
            throw doc.errors[0];
        else
            doc.errors = [];
    }
    return doc.toJS(Object.assign({ reviver: _reviver }, options));
}
function stringify(value, replacer, options) {
    let _replacer = null;
    if (typeof replacer === 'function' || Array.isArray(replacer)) {
        _replacer = replacer;
    }
    else if (options === undefined && replacer) {
        options = replacer;
    }
    if (typeof options === 'string')
        options = options.length;
    if (typeof options === 'number') {
        const indent = Math.round(options);
        options = indent < 1 ? undefined : indent > 8 ? { indent: 8 } : { indent };
    }
    if (value === undefined) {
        const { keepUndefined } = options || replacer || {};
        if (!keepUndefined)
            return undefined;
    }
    return new Document(value, _replacer, options).toString(options);
}

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.


var isWindows$1 = process.platform === 'win32';


// JavaScript implementation of realpath, ported from node pre-v6

var DEBUG = process.env.NODE_DEBUG && /fs/.test(process.env.NODE_DEBUG);

function rethrow() {
  // Only enable in debug mode. A backtrace uses ~1000 bytes of heap space and
  // is fairly slow to generate.
  var callback;
  if (DEBUG) {
    var backtrace = new Error;
    callback = debugCallback;
  } else
    callback = missingCallback;

  return callback;

  function debugCallback(err) {
    if (err) {
      backtrace.message = err.message;
      err = backtrace;
      missingCallback(err);
    }
  }

  function missingCallback(err) {
    if (err) {
      if (process.throwDeprecation)
        throw err;  // Forgot a callback but don't know where? Use NODE_DEBUG=fs
      else if (!process.noDeprecation) {
        var msg = 'fs: missing callback ' + (err.stack || err.message);
        if (process.traceDeprecation)
          console.trace(msg);
        else
          console.error(msg);
      }
    }
  }
}

function maybeCallback(cb) {
  return typeof cb === 'function' ? cb : rethrow();
}

path__default['default'].normalize;

// Regexp that finds the next partion of a (partial) path
// result is [base_with_slash, base], e.g. ['somedir/', 'somedir']
if (isWindows$1) {
  var nextPartRe = /(.*?)(?:[\/\\]+|$)/g;
} else {
  var nextPartRe = /(.*?)(?:[\/]+|$)/g;
}

// Regex to find the device root, including trailing slash. E.g. 'c:\\'.
if (isWindows$1) {
  var splitRootRe = /^(?:[a-zA-Z]:|[\\\/]{2}[^\\\/]+[\\\/][^\\\/]+)?[\\\/]*/;
} else {
  var splitRootRe = /^[\/]*/;
}

var realpathSync$1 = function realpathSync(p, cache) {
  // make p is absolute
  p = path__default['default'].resolve(p);

  if (cache && Object.prototype.hasOwnProperty.call(cache, p)) {
    return cache[p];
  }

  var original = p,
      seenLinks = {},
      knownHard = {};

  // current character position in p
  var pos;
  // the partial path so far, including a trailing slash if any
  var current;
  // the partial path without a trailing slash (except when pointing at a root)
  var base;
  // the partial path scanned in the previous round, with slash
  var previous;

  start();

  function start() {
    // Skip over roots
    var m = splitRootRe.exec(p);
    pos = m[0].length;
    current = m[0];
    base = m[0];
    previous = '';

    // On windows, check that the root exists. On unix there is no need.
    if (isWindows$1 && !knownHard[base]) {
      fs__default['default'].lstatSync(base);
      knownHard[base] = true;
    }
  }

  // walk down the path, swapping out linked pathparts for their real
  // values
  // NB: p.length changes.
  while (pos < p.length) {
    // find the next part
    nextPartRe.lastIndex = pos;
    var result = nextPartRe.exec(p);
    previous = current;
    current += result[0];
    base = previous + result[1];
    pos = nextPartRe.lastIndex;

    // continue if not a symlink
    if (knownHard[base] || (cache && cache[base] === base)) {
      continue;
    }

    var resolvedLink;
    if (cache && Object.prototype.hasOwnProperty.call(cache, base)) {
      // some known symbolic link.  no need to stat again.
      resolvedLink = cache[base];
    } else {
      var stat = fs__default['default'].lstatSync(base);
      if (!stat.isSymbolicLink()) {
        knownHard[base] = true;
        if (cache) cache[base] = base;
        continue;
      }

      // read the link if it wasn't read before
      // dev/ino always return 0 on windows, so skip the check.
      var linkTarget = null;
      if (!isWindows$1) {
        var id = stat.dev.toString(32) + ':' + stat.ino.toString(32);
        if (seenLinks.hasOwnProperty(id)) {
          linkTarget = seenLinks[id];
        }
      }
      if (linkTarget === null) {
        fs__default['default'].statSync(base);
        linkTarget = fs__default['default'].readlinkSync(base);
      }
      resolvedLink = path__default['default'].resolve(previous, linkTarget);
      // track this, if given a cache.
      if (cache) cache[base] = resolvedLink;
      if (!isWindows$1) seenLinks[id] = linkTarget;
    }

    // resolve the link, then start over
    p = path__default['default'].resolve(resolvedLink, p.slice(pos));
    start();
  }

  if (cache) cache[original] = p;

  return p;
};


var realpath$1 = function realpath(p, cache, cb) {
  if (typeof cb !== 'function') {
    cb = maybeCallback(cache);
    cache = null;
  }

  // make p is absolute
  p = path__default['default'].resolve(p);

  if (cache && Object.prototype.hasOwnProperty.call(cache, p)) {
    return process.nextTick(cb.bind(null, null, cache[p]));
  }

  var original = p,
      seenLinks = {},
      knownHard = {};

  // current character position in p
  var pos;
  // the partial path so far, including a trailing slash if any
  var current;
  // the partial path without a trailing slash (except when pointing at a root)
  var base;
  // the partial path scanned in the previous round, with slash
  var previous;

  start();

  function start() {
    // Skip over roots
    var m = splitRootRe.exec(p);
    pos = m[0].length;
    current = m[0];
    base = m[0];
    previous = '';

    // On windows, check that the root exists. On unix there is no need.
    if (isWindows$1 && !knownHard[base]) {
      fs__default['default'].lstat(base, function(err) {
        if (err) return cb(err);
        knownHard[base] = true;
        LOOP();
      });
    } else {
      process.nextTick(LOOP);
    }
  }

  // walk down the path, swapping out linked pathparts for their real
  // values
  function LOOP() {
    // stop if scanned past end of path
    if (pos >= p.length) {
      if (cache) cache[original] = p;
      return cb(null, p);
    }

    // find the next part
    nextPartRe.lastIndex = pos;
    var result = nextPartRe.exec(p);
    previous = current;
    current += result[0];
    base = previous + result[1];
    pos = nextPartRe.lastIndex;

    // continue if not a symlink
    if (knownHard[base] || (cache && cache[base] === base)) {
      return process.nextTick(LOOP);
    }

    if (cache && Object.prototype.hasOwnProperty.call(cache, base)) {
      // known symbolic link.  no need to stat again.
      return gotResolvedLink(cache[base]);
    }

    return fs__default['default'].lstat(base, gotStat);
  }

  function gotStat(err, stat) {
    if (err) return cb(err);

    // if not a symlink, skip to the next path part
    if (!stat.isSymbolicLink()) {
      knownHard[base] = true;
      if (cache) cache[base] = base;
      return process.nextTick(LOOP);
    }

    // stat & read the link if not read before
    // call gotTarget as soon as the link target is known
    // dev/ino always return 0 on windows, so skip the check.
    if (!isWindows$1) {
      var id = stat.dev.toString(32) + ':' + stat.ino.toString(32);
      if (seenLinks.hasOwnProperty(id)) {
        return gotTarget(null, seenLinks[id], base);
      }
    }
    fs__default['default'].stat(base, function(err) {
      if (err) return cb(err);

      fs__default['default'].readlink(base, function(err, target) {
        if (!isWindows$1) seenLinks[id] = target;
        gotTarget(err, target);
      });
    });
  }

  function gotTarget(err, target, base) {
    if (err) return cb(err);

    var resolvedLink = path__default['default'].resolve(previous, target);
    if (cache) cache[base] = resolvedLink;
    gotResolvedLink(resolvedLink);
  }

  function gotResolvedLink(resolvedLink) {
    // resolve the link, then start over
    p = path__default['default'].resolve(resolvedLink, p.slice(pos));
    start();
  }
};

var old = {
	realpathSync: realpathSync$1,
	realpath: realpath$1
};

var fs_realpath = realpath;
realpath.realpath = realpath;
realpath.sync = realpathSync;
realpath.realpathSync = realpathSync;
realpath.monkeypatch = monkeypatch;
realpath.unmonkeypatch = unmonkeypatch;


var origRealpath = fs__default['default'].realpath;
var origRealpathSync = fs__default['default'].realpathSync;

var version = process.version;
var ok = /^v[0-5]\./.test(version);


function newError (er) {
  return er && er.syscall === 'realpath' && (
    er.code === 'ELOOP' ||
    er.code === 'ENOMEM' ||
    er.code === 'ENAMETOOLONG'
  )
}

function realpath (p, cache, cb) {
  if (ok) {
    return origRealpath(p, cache, cb)
  }

  if (typeof cache === 'function') {
    cb = cache;
    cache = null;
  }
  origRealpath(p, cache, function (er, result) {
    if (newError(er)) {
      old.realpath(p, cache, cb);
    } else {
      cb(er, result);
    }
  });
}

function realpathSync (p, cache) {
  if (ok) {
    return origRealpathSync(p, cache)
  }

  try {
    return origRealpathSync(p, cache)
  } catch (er) {
    if (newError(er)) {
      return old.realpathSync(p, cache)
    } else {
      throw er
    }
  }
}

function monkeypatch () {
  fs__default['default'].realpath = realpath;
  fs__default['default'].realpathSync = realpathSync;
}

function unmonkeypatch () {
  fs__default['default'].realpath = origRealpath;
  fs__default['default'].realpathSync = origRealpathSync;
}

var concatMap = function (xs, fn) {
    var res = [];
    for (var i = 0; i < xs.length; i++) {
        var x = fn(xs[i], i);
        if (isArray(x)) res.push.apply(res, x);
        else res.push(x);
    }
    return res;
};

var isArray = Array.isArray || function (xs) {
    return Object.prototype.toString.call(xs) === '[object Array]';
};

var balancedMatch = balanced;
function balanced(a, b, str) {
  if (a instanceof RegExp) a = maybeMatch(a, str);
  if (b instanceof RegExp) b = maybeMatch(b, str);

  var r = range(a, b, str);

  return r && {
    start: r[0],
    end: r[1],
    pre: str.slice(0, r[0]),
    body: str.slice(r[0] + a.length, r[1]),
    post: str.slice(r[1] + b.length)
  };
}

function maybeMatch(reg, str) {
  var m = str.match(reg);
  return m ? m[0] : null;
}

balanced.range = range;
function range(a, b, str) {
  var begs, beg, left, right, result;
  var ai = str.indexOf(a);
  var bi = str.indexOf(b, ai + 1);
  var i = ai;

  if (ai >= 0 && bi > 0) {
    if(a===b) {
      return [ai, bi];
    }
    begs = [];
    left = str.length;

    while (i >= 0 && !result) {
      if (i == ai) {
        begs.push(i);
        ai = str.indexOf(a, i + 1);
      } else if (begs.length == 1) {
        result = [ begs.pop(), bi ];
      } else {
        beg = begs.pop();
        if (beg < left) {
          left = beg;
          right = bi;
        }

        bi = str.indexOf(b, i + 1);
      }

      i = ai < bi && ai >= 0 ? ai : bi;
    }

    if (begs.length) {
      result = [ left, right ];
    }
  }

  return result;
}

var braceExpansion = expandTop;

var escSlash = '\0SLASH'+Math.random()+'\0';
var escOpen = '\0OPEN'+Math.random()+'\0';
var escClose = '\0CLOSE'+Math.random()+'\0';
var escComma = '\0COMMA'+Math.random()+'\0';
var escPeriod = '\0PERIOD'+Math.random()+'\0';

function numeric(str) {
  return parseInt(str, 10) == str
    ? parseInt(str, 10)
    : str.charCodeAt(0);
}

function escapeBraces(str) {
  return str.split('\\\\').join(escSlash)
            .split('\\{').join(escOpen)
            .split('\\}').join(escClose)
            .split('\\,').join(escComma)
            .split('\\.').join(escPeriod);
}

function unescapeBraces(str) {
  return str.split(escSlash).join('\\')
            .split(escOpen).join('{')
            .split(escClose).join('}')
            .split(escComma).join(',')
            .split(escPeriod).join('.');
}


// Basically just str.split(","), but handling cases
// where we have nested braced sections, which should be
// treated as individual members, like {a,{b,c},d}
function parseCommaParts(str) {
  if (!str)
    return [''];

  var parts = [];
  var m = balancedMatch('{', '}', str);

  if (!m)
    return str.split(',');

  var pre = m.pre;
  var body = m.body;
  var post = m.post;
  var p = pre.split(',');

  p[p.length-1] += '{' + body + '}';
  var postParts = parseCommaParts(post);
  if (post.length) {
    p[p.length-1] += postParts.shift();
    p.push.apply(p, postParts);
  }

  parts.push.apply(parts, p);

  return parts;
}

function expandTop(str) {
  if (!str)
    return [];

  // I don't know why Bash 4.3 does this, but it does.
  // Anything starting with {} will have the first two bytes preserved
  // but *only* at the top level, so {},a}b will not expand to anything,
  // but a{},b}c will be expanded to [a}c,abc].
  // One could argue that this is a bug in Bash, but since the goal of
  // this module is to match Bash's rules, we escape a leading {}
  if (str.substr(0, 2) === '{}') {
    str = '\\{\\}' + str.substr(2);
  }

  return expand(escapeBraces(str), true).map(unescapeBraces);
}

function embrace(str) {
  return '{' + str + '}';
}
function isPadded(el) {
  return /^-?0\d/.test(el);
}

function lte(i, y) {
  return i <= y;
}
function gte(i, y) {
  return i >= y;
}

function expand(str, isTop) {
  var expansions = [];

  var m = balancedMatch('{', '}', str);
  if (!m || /\$$/.test(m.pre)) return [str];

  var isNumericSequence = /^-?\d+\.\.-?\d+(?:\.\.-?\d+)?$/.test(m.body);
  var isAlphaSequence = /^[a-zA-Z]\.\.[a-zA-Z](?:\.\.-?\d+)?$/.test(m.body);
  var isSequence = isNumericSequence || isAlphaSequence;
  var isOptions = m.body.indexOf(',') >= 0;
  if (!isSequence && !isOptions) {
    // {a},b}
    if (m.post.match(/,.*\}/)) {
      str = m.pre + '{' + m.body + escClose + m.post;
      return expand(str);
    }
    return [str];
  }

  var n;
  if (isSequence) {
    n = m.body.split(/\.\./);
  } else {
    n = parseCommaParts(m.body);
    if (n.length === 1) {
      // x{{a,b}}y ==> x{a}y x{b}y
      n = expand(n[0], false).map(embrace);
      if (n.length === 1) {
        var post = m.post.length
          ? expand(m.post, false)
          : [''];
        return post.map(function(p) {
          return m.pre + n[0] + p;
        });
      }
    }
  }

  // at this point, n is the parts, and we know it's not a comma set
  // with a single entry.

  // no need to expand pre, since it is guaranteed to be free of brace-sets
  var pre = m.pre;
  var post = m.post.length
    ? expand(m.post, false)
    : [''];

  var N;

  if (isSequence) {
    var x = numeric(n[0]);
    var y = numeric(n[1]);
    var width = Math.max(n[0].length, n[1].length);
    var incr = n.length == 3
      ? Math.abs(numeric(n[2]))
      : 1;
    var test = lte;
    var reverse = y < x;
    if (reverse) {
      incr *= -1;
      test = gte;
    }
    var pad = n.some(isPadded);

    N = [];

    for (var i = x; test(i, y); i += incr) {
      var c;
      if (isAlphaSequence) {
        c = String.fromCharCode(i);
        if (c === '\\')
          c = '';
      } else {
        c = String(i);
        if (pad) {
          var need = width - c.length;
          if (need > 0) {
            var z = new Array(need + 1).join('0');
            if (i < 0)
              c = '-' + z + c.slice(1);
            else
              c = z + c;
          }
        }
      }
      N.push(c);
    }
  } else {
    N = concatMap(n, function(el) { return expand(el, false) });
  }

  for (var j = 0; j < N.length; j++) {
    for (var k = 0; k < post.length; k++) {
      var expansion = pre + N[j] + post[k];
      if (!isTop || isSequence || expansion)
        expansions.push(expansion);
    }
  }

  return expansions;
}

var minimatch_1 = minimatch;
minimatch.Minimatch = Minimatch$1;

var path = { sep: '/' };
try {
  path = path__default['default'];
} catch (er) {}

var GLOBSTAR = minimatch.GLOBSTAR = Minimatch$1.GLOBSTAR = {};


var plTypes = {
  '!': { open: '(?:(?!(?:', close: '))[^/]*?)'},
  '?': { open: '(?:', close: ')?' },
  '+': { open: '(?:', close: ')+' },
  '*': { open: '(?:', close: ')*' },
  '@': { open: '(?:', close: ')' }
};

// any single thing other than /
// don't need to escape / when using new RegExp()
var qmark = '[^/]';

// * => any number of characters
var star = qmark + '*?';

// ** when dots are allowed.  Anything goes, except .. and .
// not (^ or / followed by one or two dots followed by $ or /),
// followed by anything, any number of times.
var twoStarDot = '(?:(?!(?:\\\/|^)(?:\\.{1,2})($|\\\/)).)*?';

// not a ^ or / followed by a dot,
// followed by anything, any number of times.
var twoStarNoDot = '(?:(?!(?:\\\/|^)\\.).)*?';

// characters that need to be escaped in RegExp.
var reSpecials = charSet('().*{}+?[]^$\\!');

// "abc" -> { a:true, b:true, c:true }
function charSet (s) {
  return s.split('').reduce(function (set, c) {
    set[c] = true;
    return set
  }, {})
}

// normalizes slashes.
var slashSplit = /\/+/;

minimatch.filter = filter;
function filter (pattern, options) {
  options = options || {};
  return function (p, i, list) {
    return minimatch(p, pattern, options)
  }
}

function ext (a, b) {
  a = a || {};
  b = b || {};
  var t = {};
  Object.keys(b).forEach(function (k) {
    t[k] = b[k];
  });
  Object.keys(a).forEach(function (k) {
    t[k] = a[k];
  });
  return t
}

minimatch.defaults = function (def) {
  if (!def || !Object.keys(def).length) return minimatch

  var orig = minimatch;

  var m = function minimatch (p, pattern, options) {
    return orig.minimatch(p, pattern, ext(def, options))
  };

  m.Minimatch = function Minimatch (pattern, options) {
    return new orig.Minimatch(pattern, ext(def, options))
  };

  return m
};

Minimatch$1.defaults = function (def) {
  if (!def || !Object.keys(def).length) return Minimatch$1
  return minimatch.defaults(def).Minimatch
};

function minimatch (p, pattern, options) {
  if (typeof pattern !== 'string') {
    throw new TypeError('glob pattern string required')
  }

  if (!options) options = {};

  // shortcut: comments match nothing.
  if (!options.nocomment && pattern.charAt(0) === '#') {
    return false
  }

  // "" only matches ""
  if (pattern.trim() === '') return p === ''

  return new Minimatch$1(pattern, options).match(p)
}

function Minimatch$1 (pattern, options) {
  if (!(this instanceof Minimatch$1)) {
    return new Minimatch$1(pattern, options)
  }

  if (typeof pattern !== 'string') {
    throw new TypeError('glob pattern string required')
  }

  if (!options) options = {};
  pattern = pattern.trim();

  // windows support: need to use /, not \
  if (path.sep !== '/') {
    pattern = pattern.split(path.sep).join('/');
  }

  this.options = options;
  this.set = [];
  this.pattern = pattern;
  this.regexp = null;
  this.negate = false;
  this.comment = false;
  this.empty = false;

  // make the set of regexps etc.
  this.make();
}

Minimatch$1.prototype.debug = function () {};

Minimatch$1.prototype.make = make;
function make () {
  // don't do it more than once.
  if (this._made) return

  var pattern = this.pattern;
  var options = this.options;

  // empty patterns and comments match nothing.
  if (!options.nocomment && pattern.charAt(0) === '#') {
    this.comment = true;
    return
  }
  if (!pattern) {
    this.empty = true;
    return
  }

  // step 1: figure out negation, etc.
  this.parseNegate();

  // step 2: expand braces
  var set = this.globSet = this.braceExpand();

  if (options.debug) this.debug = console.error;

  this.debug(this.pattern, set);

  // step 3: now we have a set, so turn each one into a series of path-portion
  // matching patterns.
  // These will be regexps, except in the case of "**", which is
  // set to the GLOBSTAR object for globstar behavior,
  // and will not contain any / characters
  set = this.globParts = set.map(function (s) {
    return s.split(slashSplit)
  });

  this.debug(this.pattern, set);

  // glob --> regexps
  set = set.map(function (s, si, set) {
    return s.map(this.parse, this)
  }, this);

  this.debug(this.pattern, set);

  // filter out everything that didn't compile properly.
  set = set.filter(function (s) {
    return s.indexOf(false) === -1
  });

  this.debug(this.pattern, set);

  this.set = set;
}

Minimatch$1.prototype.parseNegate = parseNegate;
function parseNegate () {
  var pattern = this.pattern;
  var negate = false;
  var options = this.options;
  var negateOffset = 0;

  if (options.nonegate) return

  for (var i = 0, l = pattern.length
    ; i < l && pattern.charAt(i) === '!'
    ; i++) {
    negate = !negate;
    negateOffset++;
  }

  if (negateOffset) this.pattern = pattern.substr(negateOffset);
  this.negate = negate;
}

// Brace expansion:
// a{b,c}d -> abd acd
// a{b,}c -> abc ac
// a{0..3}d -> a0d a1d a2d a3d
// a{b,c{d,e}f}g -> abg acdfg acefg
// a{b,c}d{e,f}g -> abdeg acdeg abdeg abdfg
//
// Invalid sets are not expanded.
// a{2..}b -> a{2..}b
// a{b}c -> a{b}c
minimatch.braceExpand = function (pattern, options) {
  return braceExpand(pattern, options)
};

Minimatch$1.prototype.braceExpand = braceExpand;

function braceExpand (pattern, options) {
  if (!options) {
    if (this instanceof Minimatch$1) {
      options = this.options;
    } else {
      options = {};
    }
  }

  pattern = typeof pattern === 'undefined'
    ? this.pattern : pattern;

  if (typeof pattern === 'undefined') {
    throw new TypeError('undefined pattern')
  }

  if (options.nobrace ||
    !pattern.match(/\{.*\}/)) {
    // shortcut. no need to expand.
    return [pattern]
  }

  return braceExpansion(pattern)
}

// parse a component of the expanded set.
// At this point, no pattern may contain "/" in it
// so we're going to return a 2d array, where each entry is the full
// pattern, split on '/', and then turned into a regular expression.
// A regexp is made at the end which joins each array with an
// escaped /, and another full one which joins each regexp with |.
//
// Following the lead of Bash 4.1, note that "**" only has special meaning
// when it is the *only* thing in a path portion.  Otherwise, any series
// of * is equivalent to a single *.  Globstar behavior is enabled by
// default, and can be disabled by setting options.noglobstar.
Minimatch$1.prototype.parse = parse;
var SUBPARSE = {};
function parse (pattern, isSub) {
  if (pattern.length > 1024 * 64) {
    throw new TypeError('pattern is too long')
  }

  var options = this.options;

  // shortcuts
  if (!options.noglobstar && pattern === '**') return GLOBSTAR
  if (pattern === '') return ''

  var re = '';
  var hasMagic = !!options.nocase;
  var escaping = false;
  // ? => one single character
  var patternListStack = [];
  var negativeLists = [];
  var stateChar;
  var inClass = false;
  var reClassStart = -1;
  var classStart = -1;
  // . and .. never match anything that doesn't start with .,
  // even when options.dot is set.
  var patternStart = pattern.charAt(0) === '.' ? '' // anything
  // not (start or / followed by . or .. followed by / or end)
  : options.dot ? '(?!(?:^|\\\/)\\.{1,2}(?:$|\\\/))'
  : '(?!\\.)';
  var self = this;

  function clearStateChar () {
    if (stateChar) {
      // we had some state-tracking character
      // that wasn't consumed by this pass.
      switch (stateChar) {
        case '*':
          re += star;
          hasMagic = true;
        break
        case '?':
          re += qmark;
          hasMagic = true;
        break
        default:
          re += '\\' + stateChar;
        break
      }
      self.debug('clearStateChar %j %j', stateChar, re);
      stateChar = false;
    }
  }

  for (var i = 0, len = pattern.length, c
    ; (i < len) && (c = pattern.charAt(i))
    ; i++) {
    this.debug('%s\t%s %s %j', pattern, i, re, c);

    // skip over any that are escaped.
    if (escaping && reSpecials[c]) {
      re += '\\' + c;
      escaping = false;
      continue
    }

    switch (c) {
      case '/':
        // completely not allowed, even escaped.
        // Should already be path-split by now.
        return false

      case '\\':
        clearStateChar();
        escaping = true;
      continue

      // the various stateChar values
      // for the "extglob" stuff.
      case '?':
      case '*':
      case '+':
      case '@':
      case '!':
        this.debug('%s\t%s %s %j <-- stateChar', pattern, i, re, c);

        // all of those are literals inside a class, except that
        // the glob [!a] means [^a] in regexp
        if (inClass) {
          this.debug('  in class');
          if (c === '!' && i === classStart + 1) c = '^';
          re += c;
          continue
        }

        // if we already have a stateChar, then it means
        // that there was something like ** or +? in there.
        // Handle the stateChar, then proceed with this one.
        self.debug('call clearStateChar %j', stateChar);
        clearStateChar();
        stateChar = c;
        // if extglob is disabled, then +(asdf|foo) isn't a thing.
        // just clear the statechar *now*, rather than even diving into
        // the patternList stuff.
        if (options.noext) clearStateChar();
      continue

      case '(':
        if (inClass) {
          re += '(';
          continue
        }

        if (!stateChar) {
          re += '\\(';
          continue
        }

        patternListStack.push({
          type: stateChar,
          start: i - 1,
          reStart: re.length,
          open: plTypes[stateChar].open,
          close: plTypes[stateChar].close
        });
        // negation is (?:(?!js)[^/]*)
        re += stateChar === '!' ? '(?:(?!(?:' : '(?:';
        this.debug('plType %j %j', stateChar, re);
        stateChar = false;
      continue

      case ')':
        if (inClass || !patternListStack.length) {
          re += '\\)';
          continue
        }

        clearStateChar();
        hasMagic = true;
        var pl = patternListStack.pop();
        // negation is (?:(?!js)[^/]*)
        // The others are (?:<pattern>)<type>
        re += pl.close;
        if (pl.type === '!') {
          negativeLists.push(pl);
        }
        pl.reEnd = re.length;
      continue

      case '|':
        if (inClass || !patternListStack.length || escaping) {
          re += '\\|';
          escaping = false;
          continue
        }

        clearStateChar();
        re += '|';
      continue

      // these are mostly the same in regexp and glob
      case '[':
        // swallow any state-tracking char before the [
        clearStateChar();

        if (inClass) {
          re += '\\' + c;
          continue
        }

        inClass = true;
        classStart = i;
        reClassStart = re.length;
        re += c;
      continue

      case ']':
        //  a right bracket shall lose its special
        //  meaning and represent itself in
        //  a bracket expression if it occurs
        //  first in the list.  -- POSIX.2 2.8.3.2
        if (i === classStart + 1 || !inClass) {
          re += '\\' + c;
          escaping = false;
          continue
        }

        // handle the case where we left a class open.
        // "[z-a]" is valid, equivalent to "\[z-a\]"
        if (inClass) {
          // split where the last [ was, make sure we don't have
          // an invalid re. if so, re-walk the contents of the
          // would-be class to re-translate any characters that
          // were passed through as-is
          // TODO: It would probably be faster to determine this
          // without a try/catch and a new RegExp, but it's tricky
          // to do safely.  For now, this is safe and works.
          var cs = pattern.substring(classStart + 1, i);
          try {
            RegExp('[' + cs + ']');
          } catch (er) {
            // not a valid class!
            var sp = this.parse(cs, SUBPARSE);
            re = re.substr(0, reClassStart) + '\\[' + sp[0] + '\\]';
            hasMagic = hasMagic || sp[1];
            inClass = false;
            continue
          }
        }

        // finish up the class.
        hasMagic = true;
        inClass = false;
        re += c;
      continue

      default:
        // swallow any state char that wasn't consumed
        clearStateChar();

        if (escaping) {
          // no need
          escaping = false;
        } else if (reSpecials[c]
          && !(c === '^' && inClass)) {
          re += '\\';
        }

        re += c;

    } // switch
  } // for

  // handle the case where we left a class open.
  // "[abc" is valid, equivalent to "\[abc"
  if (inClass) {
    // split where the last [ was, and escape it
    // this is a huge pita.  We now have to re-walk
    // the contents of the would-be class to re-translate
    // any characters that were passed through as-is
    cs = pattern.substr(classStart + 1);
    sp = this.parse(cs, SUBPARSE);
    re = re.substr(0, reClassStart) + '\\[' + sp[0];
    hasMagic = hasMagic || sp[1];
  }

  // handle the case where we had a +( thing at the *end*
  // of the pattern.
  // each pattern list stack adds 3 chars, and we need to go through
  // and escape any | chars that were passed through as-is for the regexp.
  // Go through and escape them, taking care not to double-escape any
  // | chars that were already escaped.
  for (pl = patternListStack.pop(); pl; pl = patternListStack.pop()) {
    var tail = re.slice(pl.reStart + pl.open.length);
    this.debug('setting tail', re, pl);
    // maybe some even number of \, then maybe 1 \, followed by a |
    tail = tail.replace(/((?:\\{2}){0,64})(\\?)\|/g, function (_, $1, $2) {
      if (!$2) {
        // the | isn't already escaped, so escape it.
        $2 = '\\';
      }

      // need to escape all those slashes *again*, without escaping the
      // one that we need for escaping the | character.  As it works out,
      // escaping an even number of slashes can be done by simply repeating
      // it exactly after itself.  That's why this trick works.
      //
      // I am sorry that you have to see this.
      return $1 + $1 + $2 + '|'
    });

    this.debug('tail=%j\n   %s', tail, tail, pl, re);
    var t = pl.type === '*' ? star
      : pl.type === '?' ? qmark
      : '\\' + pl.type;

    hasMagic = true;
    re = re.slice(0, pl.reStart) + t + '\\(' + tail;
  }

  // handle trailing things that only matter at the very end.
  clearStateChar();
  if (escaping) {
    // trailing \\
    re += '\\\\';
  }

  // only need to apply the nodot start if the re starts with
  // something that could conceivably capture a dot
  var addPatternStart = false;
  switch (re.charAt(0)) {
    case '.':
    case '[':
    case '(': addPatternStart = true;
  }

  // Hack to work around lack of negative lookbehind in JS
  // A pattern like: *.!(x).!(y|z) needs to ensure that a name
  // like 'a.xyz.yz' doesn't match.  So, the first negative
  // lookahead, has to look ALL the way ahead, to the end of
  // the pattern.
  for (var n = negativeLists.length - 1; n > -1; n--) {
    var nl = negativeLists[n];

    var nlBefore = re.slice(0, nl.reStart);
    var nlFirst = re.slice(nl.reStart, nl.reEnd - 8);
    var nlLast = re.slice(nl.reEnd - 8, nl.reEnd);
    var nlAfter = re.slice(nl.reEnd);

    nlLast += nlAfter;

    // Handle nested stuff like *(*.js|!(*.json)), where open parens
    // mean that we should *not* include the ) in the bit that is considered
    // "after" the negated section.
    var openParensBefore = nlBefore.split('(').length - 1;
    var cleanAfter = nlAfter;
    for (i = 0; i < openParensBefore; i++) {
      cleanAfter = cleanAfter.replace(/\)[+*?]?/, '');
    }
    nlAfter = cleanAfter;

    var dollar = '';
    if (nlAfter === '' && isSub !== SUBPARSE) {
      dollar = '$';
    }
    var newRe = nlBefore + nlFirst + nlAfter + dollar + nlLast;
    re = newRe;
  }

  // if the re is not "" at this point, then we need to make sure
  // it doesn't match against an empty path part.
  // Otherwise a/* will match a/, which it should not.
  if (re !== '' && hasMagic) {
    re = '(?=.)' + re;
  }

  if (addPatternStart) {
    re = patternStart + re;
  }

  // parsing just a piece of a larger pattern.
  if (isSub === SUBPARSE) {
    return [re, hasMagic]
  }

  // skip the regexp for non-magical patterns
  // unescape anything in it, though, so that it'll be
  // an exact match against a file etc.
  if (!hasMagic) {
    return globUnescape(pattern)
  }

  var flags = options.nocase ? 'i' : '';
  try {
    var regExp = new RegExp('^' + re + '$', flags);
  } catch (er) {
    // If it was an invalid regular expression, then it can't match
    // anything.  This trick looks for a character after the end of
    // the string, which is of course impossible, except in multi-line
    // mode, but it's not a /m regex.
    return new RegExp('$.')
  }

  regExp._glob = pattern;
  regExp._src = re;

  return regExp
}

minimatch.makeRe = function (pattern, options) {
  return new Minimatch$1(pattern, options || {}).makeRe()
};

Minimatch$1.prototype.makeRe = makeRe;
function makeRe () {
  if (this.regexp || this.regexp === false) return this.regexp

  // at this point, this.set is a 2d array of partial
  // pattern strings, or "**".
  //
  // It's better to use .match().  This function shouldn't
  // be used, really, but it's pretty convenient sometimes,
  // when you just want to work with a regex.
  var set = this.set;

  if (!set.length) {
    this.regexp = false;
    return this.regexp
  }
  var options = this.options;

  var twoStar = options.noglobstar ? star
    : options.dot ? twoStarDot
    : twoStarNoDot;
  var flags = options.nocase ? 'i' : '';

  var re = set.map(function (pattern) {
    return pattern.map(function (p) {
      return (p === GLOBSTAR) ? twoStar
      : (typeof p === 'string') ? regExpEscape(p)
      : p._src
    }).join('\\\/')
  }).join('|');

  // must match entire pattern
  // ending in a * or ** will make it less strict.
  re = '^(?:' + re + ')$';

  // can match anything, as long as it's not this.
  if (this.negate) re = '^(?!' + re + ').*$';

  try {
    this.regexp = new RegExp(re, flags);
  } catch (ex) {
    this.regexp = false;
  }
  return this.regexp
}

minimatch.match = function (list, pattern, options) {
  options = options || {};
  var mm = new Minimatch$1(pattern, options);
  list = list.filter(function (f) {
    return mm.match(f)
  });
  if (mm.options.nonull && !list.length) {
    list.push(pattern);
  }
  return list
};

Minimatch$1.prototype.match = match;
function match (f, partial) {
  this.debug('match', f, this.pattern);
  // short-circuit in the case of busted things.
  // comments, etc.
  if (this.comment) return false
  if (this.empty) return f === ''

  if (f === '/' && partial) return true

  var options = this.options;

  // windows: need to use /, not \
  if (path.sep !== '/') {
    f = f.split(path.sep).join('/');
  }

  // treat the test path as a set of pathparts.
  f = f.split(slashSplit);
  this.debug(this.pattern, 'split', f);

  // just ONE of the pattern sets in this.set needs to match
  // in order for it to be valid.  If negating, then just one
  // match means that we have failed.
  // Either way, return on the first hit.

  var set = this.set;
  this.debug(this.pattern, 'set', set);

  // Find the basename of the path by looking for the last non-empty segment
  var filename;
  var i;
  for (i = f.length - 1; i >= 0; i--) {
    filename = f[i];
    if (filename) break
  }

  for (i = 0; i < set.length; i++) {
    var pattern = set[i];
    var file = f;
    if (options.matchBase && pattern.length === 1) {
      file = [filename];
    }
    var hit = this.matchOne(file, pattern, partial);
    if (hit) {
      if (options.flipNegate) return true
      return !this.negate
    }
  }

  // didn't get any hits.  this is success if it's a negative
  // pattern, failure otherwise.
  if (options.flipNegate) return false
  return this.negate
}

// set partial to true to test if, for example,
// "/a/b" matches the start of "/*/b/*/d"
// Partial means, if you run out of file before you run
// out of pattern, then that's fine, as long as all
// the parts match.
Minimatch$1.prototype.matchOne = function (file, pattern, partial) {
  var options = this.options;

  this.debug('matchOne',
    { 'this': this, file: file, pattern: pattern });

  this.debug('matchOne', file.length, pattern.length);

  for (var fi = 0,
      pi = 0,
      fl = file.length,
      pl = pattern.length
      ; (fi < fl) && (pi < pl)
      ; fi++, pi++) {
    this.debug('matchOne loop');
    var p = pattern[pi];
    var f = file[fi];

    this.debug(pattern, p, f);

    // should be impossible.
    // some invalid regexp stuff in the set.
    if (p === false) return false

    if (p === GLOBSTAR) {
      this.debug('GLOBSTAR', [pattern, p, f]);

      // "**"
      // a/**/b/**/c would match the following:
      // a/b/x/y/z/c
      // a/x/y/z/b/c
      // a/b/x/b/x/c
      // a/b/c
      // To do this, take the rest of the pattern after
      // the **, and see if it would match the file remainder.
      // If so, return success.
      // If not, the ** "swallows" a segment, and try again.
      // This is recursively awful.
      //
      // a/**/b/**/c matching a/b/x/y/z/c
      // - a matches a
      // - doublestar
      //   - matchOne(b/x/y/z/c, b/**/c)
      //     - b matches b
      //     - doublestar
      //       - matchOne(x/y/z/c, c) -> no
      //       - matchOne(y/z/c, c) -> no
      //       - matchOne(z/c, c) -> no
      //       - matchOne(c, c) yes, hit
      var fr = fi;
      var pr = pi + 1;
      if (pr === pl) {
        this.debug('** at the end');
        // a ** at the end will just swallow the rest.
        // We have found a match.
        // however, it will not swallow /.x, unless
        // options.dot is set.
        // . and .. are *never* matched by **, for explosively
        // exponential reasons.
        for (; fi < fl; fi++) {
          if (file[fi] === '.' || file[fi] === '..' ||
            (!options.dot && file[fi].charAt(0) === '.')) return false
        }
        return true
      }

      // ok, let's see if we can swallow whatever we can.
      while (fr < fl) {
        var swallowee = file[fr];

        this.debug('\nglobstar while', file, fr, pattern, pr, swallowee);

        // XXX remove this slice.  Just pass the start index.
        if (this.matchOne(file.slice(fr), pattern.slice(pr), partial)) {
          this.debug('globstar found match!', fr, fl, swallowee);
          // found a match.
          return true
        } else {
          // can't swallow "." or ".." ever.
          // can only swallow ".foo" when explicitly asked.
          if (swallowee === '.' || swallowee === '..' ||
            (!options.dot && swallowee.charAt(0) === '.')) {
            this.debug('dot detected!', file, fr, pattern, pr);
            break
          }

          // ** swallows a segment, and continue.
          this.debug('globstar swallow a segment, and continue');
          fr++;
        }
      }

      // no match was found.
      // However, in partial mode, we can't say this is necessarily over.
      // If there's more *pattern* left, then
      if (partial) {
        // ran out of file
        this.debug('\n>>> no match, partial?', file, fr, pattern, pr);
        if (fr === fl) return true
      }
      return false
    }

    // something other than **
    // non-magic patterns just have to match exactly
    // patterns with magic have been turned into regexps.
    var hit;
    if (typeof p === 'string') {
      if (options.nocase) {
        hit = f.toLowerCase() === p.toLowerCase();
      } else {
        hit = f === p;
      }
      this.debug('string match', p, f, hit);
    } else {
      hit = f.match(p);
      this.debug('pattern match', p, f, hit);
    }

    if (!hit) return false
  }

  // Note: ending in / means that we'll get a final ""
  // at the end of the pattern.  This can only match a
  // corresponding "" at the end of the file.
  // If the file ends in /, then it can only match a
  // a pattern that ends in /, unless the pattern just
  // doesn't have any more for it. But, a/b/ should *not*
  // match "a/b/*", even though "" matches against the
  // [^/]*? pattern, except in partial mode, where it might
  // simply not be reached yet.
  // However, a/b/ should still satisfy a/*

  // now either we fell off the end of the pattern, or we're done.
  if (fi === fl && pi === pl) {
    // ran out of pattern and filename at the same time.
    // an exact hit!
    return true
  } else if (fi === fl) {
    // ran out of file, but still had pattern left.
    // this is ok if we're doing the match as part of
    // a glob fs traversal.
    return partial
  } else if (pi === pl) {
    // ran out of pattern, still have file left.
    // this is only acceptable if we're on the very last
    // empty segment of a file with a trailing slash.
    // a/* should match a/b/
    var emptyFileEnd = (fi === fl - 1) && (file[fi] === '');
    return emptyFileEnd
  }

  // should be unreachable.
  throw new Error('wtf?')
};

// replace stuff like \* with *
function globUnescape (s) {
  return s.replace(/\\(.)/g, '$1')
}

function regExpEscape (s) {
  return s.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&')
}

var inherits_browser = createCommonjsModule(function (module) {
if (typeof Object.create === 'function') {
  // implementation from standard node.js 'util' module
  module.exports = function inherits(ctor, superCtor) {
    if (superCtor) {
      ctor.super_ = superCtor;
      ctor.prototype = Object.create(superCtor.prototype, {
        constructor: {
          value: ctor,
          enumerable: false,
          writable: true,
          configurable: true
        }
      });
    }
  };
} else {
  // old school shim for old browsers
  module.exports = function inherits(ctor, superCtor) {
    if (superCtor) {
      ctor.super_ = superCtor;
      var TempCtor = function () {};
      TempCtor.prototype = superCtor.prototype;
      ctor.prototype = new TempCtor();
      ctor.prototype.constructor = ctor;
    }
  };
}
});

var inherits = createCommonjsModule(function (module) {
try {
  var util = require$$0__default['default'];
  /* istanbul ignore next */
  if (typeof util.inherits !== 'function') throw '';
  module.exports = util.inherits;
} catch (e) {
  /* istanbul ignore next */
  module.exports = inherits_browser;
}
});

function posix(path) {
	return path.charAt(0) === '/';
}

function win32(path) {
	// https://github.com/nodejs/node/blob/b3fcc245fb25539909ef1d5eaa01dbf92e168633/lib/path.js#L56
	var splitDeviceRe = /^([a-zA-Z]:|[\\\/]{2}[^\\\/]+[\\\/]+[^\\\/]+)?([\\\/])?([\s\S]*?)$/;
	var result = splitDeviceRe.exec(path);
	var device = result[1] || '';
	var isUnc = Boolean(device && device.charAt(1) !== ':');

	// UNC paths are always absolute
	return Boolean(result[2] || isUnc);
}

var pathIsAbsolute = process.platform === 'win32' ? win32 : posix;
var posix_1 = posix;
var win32_1 = win32;
pathIsAbsolute.posix = posix_1;
pathIsAbsolute.win32 = win32_1;

var alphasort_1 = alphasort;
var alphasorti_1 = alphasorti;
var setopts_1 = setopts$2;
var ownProp_1 = ownProp$2;
var makeAbs_1 = makeAbs;
var finish_1 = finish;
var mark_1 = mark;
var isIgnored_1 = isIgnored$2;
var childrenIgnored_1 = childrenIgnored$2;

function ownProp$2 (obj, field) {
  return Object.prototype.hasOwnProperty.call(obj, field)
}




var Minimatch = minimatch_1.Minimatch;

function alphasorti (a, b) {
  return a.toLowerCase().localeCompare(b.toLowerCase())
}

function alphasort (a, b) {
  return a.localeCompare(b)
}

function setupIgnores (self, options) {
  self.ignore = options.ignore || [];

  if (!Array.isArray(self.ignore))
    self.ignore = [self.ignore];

  if (self.ignore.length) {
    self.ignore = self.ignore.map(ignoreMap);
  }
}

// ignore patterns are always in dot:true mode.
function ignoreMap (pattern) {
  var gmatcher = null;
  if (pattern.slice(-3) === '/**') {
    var gpattern = pattern.replace(/(\/\*\*)+$/, '');
    gmatcher = new Minimatch(gpattern, { dot: true });
  }

  return {
    matcher: new Minimatch(pattern, { dot: true }),
    gmatcher: gmatcher
  }
}

function setopts$2 (self, pattern, options) {
  if (!options)
    options = {};

  // base-matching: just use globstar for that.
  if (options.matchBase && -1 === pattern.indexOf("/")) {
    if (options.noglobstar) {
      throw new Error("base matching requires globstar")
    }
    pattern = "**/" + pattern;
  }

  self.silent = !!options.silent;
  self.pattern = pattern;
  self.strict = options.strict !== false;
  self.realpath = !!options.realpath;
  self.realpathCache = options.realpathCache || Object.create(null);
  self.follow = !!options.follow;
  self.dot = !!options.dot;
  self.mark = !!options.mark;
  self.nodir = !!options.nodir;
  if (self.nodir)
    self.mark = true;
  self.sync = !!options.sync;
  self.nounique = !!options.nounique;
  self.nonull = !!options.nonull;
  self.nosort = !!options.nosort;
  self.nocase = !!options.nocase;
  self.stat = !!options.stat;
  self.noprocess = !!options.noprocess;
  self.absolute = !!options.absolute;

  self.maxLength = options.maxLength || Infinity;
  self.cache = options.cache || Object.create(null);
  self.statCache = options.statCache || Object.create(null);
  self.symlinks = options.symlinks || Object.create(null);

  setupIgnores(self, options);

  self.changedCwd = false;
  var cwd = process.cwd();
  if (!ownProp$2(options, "cwd"))
    self.cwd = cwd;
  else {
    self.cwd = path__default['default'].resolve(options.cwd);
    self.changedCwd = self.cwd !== cwd;
  }

  self.root = options.root || path__default['default'].resolve(self.cwd, "/");
  self.root = path__default['default'].resolve(self.root);
  if (process.platform === "win32")
    self.root = self.root.replace(/\\/g, "/");

  // TODO: is an absolute `cwd` supposed to be resolved against `root`?
  // e.g. { cwd: '/test', root: __dirname } === path.join(__dirname, '/test')
  self.cwdAbs = pathIsAbsolute(self.cwd) ? self.cwd : makeAbs(self, self.cwd);
  if (process.platform === "win32")
    self.cwdAbs = self.cwdAbs.replace(/\\/g, "/");
  self.nomount = !!options.nomount;

  // disable comments and negation in Minimatch.
  // Note that they are not supported in Glob itself anyway.
  options.nonegate = true;
  options.nocomment = true;

  self.minimatch = new Minimatch(pattern, options);
  self.options = self.minimatch.options;
}

function finish (self) {
  var nou = self.nounique;
  var all = nou ? [] : Object.create(null);

  for (var i = 0, l = self.matches.length; i < l; i ++) {
    var matches = self.matches[i];
    if (!matches || Object.keys(matches).length === 0) {
      if (self.nonull) {
        // do like the shell, and spit out the literal glob
        var literal = self.minimatch.globSet[i];
        if (nou)
          all.push(literal);
        else
          all[literal] = true;
      }
    } else {
      // had matches
      var m = Object.keys(matches);
      if (nou)
        all.push.apply(all, m);
      else
        m.forEach(function (m) {
          all[m] = true;
        });
    }
  }

  if (!nou)
    all = Object.keys(all);

  if (!self.nosort)
    all = all.sort(self.nocase ? alphasorti : alphasort);

  // at *some* point we statted all of these
  if (self.mark) {
    for (var i = 0; i < all.length; i++) {
      all[i] = self._mark(all[i]);
    }
    if (self.nodir) {
      all = all.filter(function (e) {
        var notDir = !(/\/$/.test(e));
        var c = self.cache[e] || self.cache[makeAbs(self, e)];
        if (notDir && c)
          notDir = c !== 'DIR' && !Array.isArray(c);
        return notDir
      });
    }
  }

  if (self.ignore.length)
    all = all.filter(function(m) {
      return !isIgnored$2(self, m)
    });

  self.found = all;
}

function mark (self, p) {
  var abs = makeAbs(self, p);
  var c = self.cache[abs];
  var m = p;
  if (c) {
    var isDir = c === 'DIR' || Array.isArray(c);
    var slash = p.slice(-1) === '/';

    if (isDir && !slash)
      m += '/';
    else if (!isDir && slash)
      m = m.slice(0, -1);

    if (m !== p) {
      var mabs = makeAbs(self, m);
      self.statCache[mabs] = self.statCache[abs];
      self.cache[mabs] = self.cache[abs];
    }
  }

  return m
}

// lotta situps...
function makeAbs (self, f) {
  var abs = f;
  if (f.charAt(0) === '/') {
    abs = path__default['default'].join(self.root, f);
  } else if (pathIsAbsolute(f) || f === '') {
    abs = f;
  } else if (self.changedCwd) {
    abs = path__default['default'].resolve(self.cwd, f);
  } else {
    abs = path__default['default'].resolve(f);
  }

  if (process.platform === 'win32')
    abs = abs.replace(/\\/g, '/');

  return abs
}


// Return true, if pattern ends with globstar '**', for the accompanying parent directory.
// Ex:- If node_modules/** is the pattern, add 'node_modules' to ignore list along with it's contents
function isIgnored$2 (self, path) {
  if (!self.ignore.length)
    return false

  return self.ignore.some(function(item) {
    return item.matcher.match(path) || !!(item.gmatcher && item.gmatcher.match(path))
  })
}

function childrenIgnored$2 (self, path) {
  if (!self.ignore.length)
    return false

  return self.ignore.some(function(item) {
    return !!(item.gmatcher && item.gmatcher.match(path))
  })
}

var common = {
	alphasort: alphasort_1,
	alphasorti: alphasorti_1,
	setopts: setopts_1,
	ownProp: ownProp_1,
	makeAbs: makeAbs_1,
	finish: finish_1,
	mark: mark_1,
	isIgnored: isIgnored_1,
	childrenIgnored: childrenIgnored_1
};

var sync = globSync;
globSync.GlobSync = GlobSync$1;
var setopts$1 = common.setopts;
var ownProp$1 = common.ownProp;
var childrenIgnored$1 = common.childrenIgnored;
var isIgnored$1 = common.isIgnored;

function globSync (pattern, options) {
  if (typeof options === 'function' || arguments.length === 3)
    throw new TypeError('callback provided to sync glob\n'+
                        'See: https://github.com/isaacs/node-glob/issues/167')

  return new GlobSync$1(pattern, options).found
}

function GlobSync$1 (pattern, options) {
  if (!pattern)
    throw new Error('must provide pattern')

  if (typeof options === 'function' || arguments.length === 3)
    throw new TypeError('callback provided to sync glob\n'+
                        'See: https://github.com/isaacs/node-glob/issues/167')

  if (!(this instanceof GlobSync$1))
    return new GlobSync$1(pattern, options)

  setopts$1(this, pattern, options);

  if (this.noprocess)
    return this

  var n = this.minimatch.set.length;
  this.matches = new Array(n);
  for (var i = 0; i < n; i ++) {
    this._process(this.minimatch.set[i], i, false);
  }
  this._finish();
}

GlobSync$1.prototype._finish = function () {
  assert__default['default'](this instanceof GlobSync$1);
  if (this.realpath) {
    var self = this;
    this.matches.forEach(function (matchset, index) {
      var set = self.matches[index] = Object.create(null);
      for (var p in matchset) {
        try {
          p = self._makeAbs(p);
          var real = fs_realpath.realpathSync(p, self.realpathCache);
          set[real] = true;
        } catch (er) {
          if (er.syscall === 'stat')
            set[self._makeAbs(p)] = true;
          else
            throw er
        }
      }
    });
  }
  common.finish(this);
};


GlobSync$1.prototype._process = function (pattern, index, inGlobStar) {
  assert__default['default'](this instanceof GlobSync$1);

  // Get the first [n] parts of pattern that are all strings.
  var n = 0;
  while (typeof pattern[n] === 'string') {
    n ++;
  }
  // now n is the index of the first one that is *not* a string.

  // See if there's anything else
  var prefix;
  switch (n) {
    // if not, then this is rather simple
    case pattern.length:
      this._processSimple(pattern.join('/'), index);
      return

    case 0:
      // pattern *starts* with some non-trivial item.
      // going to readdir(cwd), but not include the prefix in matches.
      prefix = null;
      break

    default:
      // pattern has some string bits in the front.
      // whatever it starts with, whether that's 'absolute' like /foo/bar,
      // or 'relative' like '../baz'
      prefix = pattern.slice(0, n).join('/');
      break
  }

  var remain = pattern.slice(n);

  // get the list of entries.
  var read;
  if (prefix === null)
    read = '.';
  else if (pathIsAbsolute(prefix) || pathIsAbsolute(pattern.join('/'))) {
    if (!prefix || !pathIsAbsolute(prefix))
      prefix = '/' + prefix;
    read = prefix;
  } else
    read = prefix;

  var abs = this._makeAbs(read);

  //if ignored, skip processing
  if (childrenIgnored$1(this, read))
    return

  var isGlobStar = remain[0] === minimatch_1.GLOBSTAR;
  if (isGlobStar)
    this._processGlobStar(prefix, read, abs, remain, index, inGlobStar);
  else
    this._processReaddir(prefix, read, abs, remain, index, inGlobStar);
};


GlobSync$1.prototype._processReaddir = function (prefix, read, abs, remain, index, inGlobStar) {
  var entries = this._readdir(abs, inGlobStar);

  // if the abs isn't a dir, then nothing can match!
  if (!entries)
    return

  // It will only match dot entries if it starts with a dot, or if
  // dot is set.  Stuff like @(.foo|.bar) isn't allowed.
  var pn = remain[0];
  var negate = !!this.minimatch.negate;
  var rawGlob = pn._glob;
  var dotOk = this.dot || rawGlob.charAt(0) === '.';

  var matchedEntries = [];
  for (var i = 0; i < entries.length; i++) {
    var e = entries[i];
    if (e.charAt(0) !== '.' || dotOk) {
      var m;
      if (negate && !prefix) {
        m = !e.match(pn);
      } else {
        m = e.match(pn);
      }
      if (m)
        matchedEntries.push(e);
    }
  }

  var len = matchedEntries.length;
  // If there are no matched entries, then nothing matches.
  if (len === 0)
    return

  // if this is the last remaining pattern bit, then no need for
  // an additional stat *unless* the user has specified mark or
  // stat explicitly.  We know they exist, since readdir returned
  // them.

  if (remain.length === 1 && !this.mark && !this.stat) {
    if (!this.matches[index])
      this.matches[index] = Object.create(null);

    for (var i = 0; i < len; i ++) {
      var e = matchedEntries[i];
      if (prefix) {
        if (prefix.slice(-1) !== '/')
          e = prefix + '/' + e;
        else
          e = prefix + e;
      }

      if (e.charAt(0) === '/' && !this.nomount) {
        e = path__default['default'].join(this.root, e);
      }
      this._emitMatch(index, e);
    }
    // This was the last one, and no stats were needed
    return
  }

  // now test all matched entries as stand-ins for that part
  // of the pattern.
  remain.shift();
  for (var i = 0; i < len; i ++) {
    var e = matchedEntries[i];
    var newPattern;
    if (prefix)
      newPattern = [prefix, e];
    else
      newPattern = [e];
    this._process(newPattern.concat(remain), index, inGlobStar);
  }
};


GlobSync$1.prototype._emitMatch = function (index, e) {
  if (isIgnored$1(this, e))
    return

  var abs = this._makeAbs(e);

  if (this.mark)
    e = this._mark(e);

  if (this.absolute) {
    e = abs;
  }

  if (this.matches[index][e])
    return

  if (this.nodir) {
    var c = this.cache[abs];
    if (c === 'DIR' || Array.isArray(c))
      return
  }

  this.matches[index][e] = true;

  if (this.stat)
    this._stat(e);
};


GlobSync$1.prototype._readdirInGlobStar = function (abs) {
  // follow all symlinked directories forever
  // just proceed as if this is a non-globstar situation
  if (this.follow)
    return this._readdir(abs, false)

  var entries;
  var lstat;
  try {
    lstat = fs__default['default'].lstatSync(abs);
  } catch (er) {
    if (er.code === 'ENOENT') {
      // lstat failed, doesn't exist
      return null
    }
  }

  var isSym = lstat && lstat.isSymbolicLink();
  this.symlinks[abs] = isSym;

  // If it's not a symlink or a dir, then it's definitely a regular file.
  // don't bother doing a readdir in that case.
  if (!isSym && lstat && !lstat.isDirectory())
    this.cache[abs] = 'FILE';
  else
    entries = this._readdir(abs, false);

  return entries
};

GlobSync$1.prototype._readdir = function (abs, inGlobStar) {

  if (inGlobStar && !ownProp$1(this.symlinks, abs))
    return this._readdirInGlobStar(abs)

  if (ownProp$1(this.cache, abs)) {
    var c = this.cache[abs];
    if (!c || c === 'FILE')
      return null

    if (Array.isArray(c))
      return c
  }

  try {
    return this._readdirEntries(abs, fs__default['default'].readdirSync(abs))
  } catch (er) {
    this._readdirError(abs, er);
    return null
  }
};

GlobSync$1.prototype._readdirEntries = function (abs, entries) {
  // if we haven't asked to stat everything, then just
  // assume that everything in there exists, so we can avoid
  // having to stat it a second time.
  if (!this.mark && !this.stat) {
    for (var i = 0; i < entries.length; i ++) {
      var e = entries[i];
      if (abs === '/')
        e = abs + e;
      else
        e = abs + '/' + e;
      this.cache[e] = true;
    }
  }

  this.cache[abs] = entries;

  // mark and cache dir-ness
  return entries
};

GlobSync$1.prototype._readdirError = function (f, er) {
  // handle errors, and cache the information
  switch (er.code) {
    case 'ENOTSUP': // https://github.com/isaacs/node-glob/issues/205
    case 'ENOTDIR': // totally normal. means it *does* exist.
      var abs = this._makeAbs(f);
      this.cache[abs] = 'FILE';
      if (abs === this.cwdAbs) {
        var error = new Error(er.code + ' invalid cwd ' + this.cwd);
        error.path = this.cwd;
        error.code = er.code;
        throw error
      }
      break

    case 'ENOENT': // not terribly unusual
    case 'ELOOP':
    case 'ENAMETOOLONG':
    case 'UNKNOWN':
      this.cache[this._makeAbs(f)] = false;
      break

    default: // some unusual error.  Treat as failure.
      this.cache[this._makeAbs(f)] = false;
      if (this.strict)
        throw er
      if (!this.silent)
        console.error('glob error', er);
      break
  }
};

GlobSync$1.prototype._processGlobStar = function (prefix, read, abs, remain, index, inGlobStar) {

  var entries = this._readdir(abs, inGlobStar);

  // no entries means not a dir, so it can never have matches
  // foo.txt/** doesn't match foo.txt
  if (!entries)
    return

  // test without the globstar, and with every child both below
  // and replacing the globstar.
  var remainWithoutGlobStar = remain.slice(1);
  var gspref = prefix ? [ prefix ] : [];
  var noGlobStar = gspref.concat(remainWithoutGlobStar);

  // the noGlobStar pattern exits the inGlobStar state
  this._process(noGlobStar, index, false);

  var len = entries.length;
  var isSym = this.symlinks[abs];

  // If it's a symlink, and we're in a globstar, then stop
  if (isSym && inGlobStar)
    return

  for (var i = 0; i < len; i++) {
    var e = entries[i];
    if (e.charAt(0) === '.' && !this.dot)
      continue

    // these two cases enter the inGlobStar state
    var instead = gspref.concat(entries[i], remainWithoutGlobStar);
    this._process(instead, index, true);

    var below = gspref.concat(entries[i], remain);
    this._process(below, index, true);
  }
};

GlobSync$1.prototype._processSimple = function (prefix, index) {
  // XXX review this.  Shouldn't it be doing the mounting etc
  // before doing stat?  kinda weird?
  var exists = this._stat(prefix);

  if (!this.matches[index])
    this.matches[index] = Object.create(null);

  // If it doesn't exist, then just mark the lack of results
  if (!exists)
    return

  if (prefix && pathIsAbsolute(prefix) && !this.nomount) {
    var trail = /[\/\\]$/.test(prefix);
    if (prefix.charAt(0) === '/') {
      prefix = path__default['default'].join(this.root, prefix);
    } else {
      prefix = path__default['default'].resolve(this.root, prefix);
      if (trail)
        prefix += '/';
    }
  }

  if (process.platform === 'win32')
    prefix = prefix.replace(/\\/g, '/');

  // Mark this as a match
  this._emitMatch(index, prefix);
};

// Returns either 'DIR', 'FILE', or false
GlobSync$1.prototype._stat = function (f) {
  var abs = this._makeAbs(f);
  var needDir = f.slice(-1) === '/';

  if (f.length > this.maxLength)
    return false

  if (!this.stat && ownProp$1(this.cache, abs)) {
    var c = this.cache[abs];

    if (Array.isArray(c))
      c = 'DIR';

    // It exists, but maybe not how we need it
    if (!needDir || c === 'DIR')
      return c

    if (needDir && c === 'FILE')
      return false

    // otherwise we have to stat, because maybe c=true
    // if we know it exists, but not what it is.
  }
  var stat = this.statCache[abs];
  if (!stat) {
    var lstat;
    try {
      lstat = fs__default['default'].lstatSync(abs);
    } catch (er) {
      if (er && (er.code === 'ENOENT' || er.code === 'ENOTDIR')) {
        this.statCache[abs] = false;
        return false
      }
    }

    if (lstat && lstat.isSymbolicLink()) {
      try {
        stat = fs__default['default'].statSync(abs);
      } catch (er) {
        stat = lstat;
      }
    } else {
      stat = lstat;
    }
  }

  this.statCache[abs] = stat;

  var c = true;
  if (stat)
    c = stat.isDirectory() ? 'DIR' : 'FILE';

  this.cache[abs] = this.cache[abs] || c;

  if (needDir && c === 'FILE')
    return false

  return c
};

GlobSync$1.prototype._mark = function (p) {
  return common.mark(this, p)
};

GlobSync$1.prototype._makeAbs = function (f) {
  return common.makeAbs(this, f)
};

// Returns a wrapper function that returns a wrapped callback
// The wrapper function should do some stuff, and return a
// presumably different callback function.
// This makes sure that own properties are retained, so that
// decorations and such are not lost along the way.
var wrappy_1 = wrappy;
function wrappy (fn, cb) {
  if (fn && cb) return wrappy(fn)(cb)

  if (typeof fn !== 'function')
    throw new TypeError('need wrapper function')

  Object.keys(fn).forEach(function (k) {
    wrapper[k] = fn[k];
  });

  return wrapper

  function wrapper() {
    var args = new Array(arguments.length);
    for (var i = 0; i < args.length; i++) {
      args[i] = arguments[i];
    }
    var ret = fn.apply(this, args);
    var cb = args[args.length-1];
    if (typeof ret === 'function' && ret !== cb) {
      Object.keys(cb).forEach(function (k) {
        ret[k] = cb[k];
      });
    }
    return ret
  }
}

var once_1 = wrappy_1(once);
var strict = wrappy_1(onceStrict);

once.proto = once(function () {
  Object.defineProperty(Function.prototype, 'once', {
    value: function () {
      return once(this)
    },
    configurable: true
  });

  Object.defineProperty(Function.prototype, 'onceStrict', {
    value: function () {
      return onceStrict(this)
    },
    configurable: true
  });
});

function once (fn) {
  var f = function () {
    if (f.called) return f.value
    f.called = true;
    return f.value = fn.apply(this, arguments)
  };
  f.called = false;
  return f
}

function onceStrict (fn) {
  var f = function () {
    if (f.called)
      throw new Error(f.onceError)
    f.called = true;
    return f.value = fn.apply(this, arguments)
  };
  var name = fn.name || 'Function wrapped with `once`';
  f.onceError = name + " shouldn't be called more than once";
  f.called = false;
  return f
}
once_1.strict = strict;

var reqs = Object.create(null);


var inflight_1 = wrappy_1(inflight);

function inflight (key, cb) {
  if (reqs[key]) {
    reqs[key].push(cb);
    return null
  } else {
    reqs[key] = [cb];
    return makeres(key)
  }
}

function makeres (key) {
  return once_1(function RES () {
    var cbs = reqs[key];
    var len = cbs.length;
    var args = slice(arguments);

    // XXX It's somewhat ambiguous whether a new callback added in this
    // pass should be queued for later execution if something in the
    // list of callbacks throws, or if it should just be discarded.
    // However, it's such an edge case that it hardly matters, and either
    // choice is likely as surprising as the other.
    // As it happens, we do go ahead and schedule it for later execution.
    try {
      for (var i = 0; i < len; i++) {
        cbs[i].apply(null, args);
      }
    } finally {
      if (cbs.length > len) {
        // added more in the interim.
        // de-zalgo, just in case, but don't call again.
        cbs.splice(0, len);
        process.nextTick(function () {
          RES.apply(null, args);
        });
      } else {
        delete reqs[key];
      }
    }
  })
}

function slice (args) {
  var length = args.length;
  var array = [];

  for (var i = 0; i < length; i++) array[i] = args[i];
  return array
}

// Approach:
//
// 1. Get the minimatch set
// 2. For each pattern in the set, PROCESS(pattern, false)
// 3. Store matches per-set, then uniq them
//
// PROCESS(pattern, inGlobStar)
// Get the first [n] items from pattern that are all strings
// Join these together.  This is PREFIX.
//   If there is no more remaining, then stat(PREFIX) and
//   add to matches if it succeeds.  END.
//
// If inGlobStar and PREFIX is symlink and points to dir
//   set ENTRIES = []
// else readdir(PREFIX) as ENTRIES
//   If fail, END
//
// with ENTRIES
//   If pattern[n] is GLOBSTAR
//     // handle the case where the globstar match is empty
//     // by pruning it out, and testing the resulting pattern
//     PROCESS(pattern[0..n] + pattern[n+1 .. $], false)
//     // handle other cases.
//     for ENTRY in ENTRIES (not dotfiles)
//       // attach globstar + tail onto the entry
//       // Mark that this entry is a globstar match
//       PROCESS(pattern[0..n] + ENTRY + pattern[n .. $], true)
//
//   else // not globstar
//     for ENTRY in ENTRIES (not dotfiles, unless pattern[n] is dot)
//       Test ENTRY against pattern[n]
//       If fails, continue
//       If passes, PROCESS(pattern[0..n] + item + pattern[n+1 .. $])
//
// Caveat:
//   Cache all stats and readdirs results to minimize syscall.  Since all
//   we ever care about is existence and directory-ness, we can just keep
//   `true` for files, and [children,...] for directories, or `false` for
//   things that don't exist.

var glob_1 = glob;

var EE = require$$0__default$1['default'].EventEmitter;
var setopts = common.setopts;
var ownProp = common.ownProp;


var childrenIgnored = common.childrenIgnored;
var isIgnored = common.isIgnored;



function glob (pattern, options, cb) {
  if (typeof options === 'function') cb = options, options = {};
  if (!options) options = {};

  if (options.sync) {
    if (cb)
      throw new TypeError('callback provided to sync glob')
    return sync(pattern, options)
  }

  return new Glob(pattern, options, cb)
}

glob.sync = sync;
var GlobSync = glob.GlobSync = sync.GlobSync;

// old api surface
glob.glob = glob;

function extend (origin, add) {
  if (add === null || typeof add !== 'object') {
    return origin
  }

  var keys = Object.keys(add);
  var i = keys.length;
  while (i--) {
    origin[keys[i]] = add[keys[i]];
  }
  return origin
}

glob.hasMagic = function (pattern, options_) {
  var options = extend({}, options_);
  options.noprocess = true;

  var g = new Glob(pattern, options);
  var set = g.minimatch.set;

  if (!pattern)
    return false

  if (set.length > 1)
    return true

  for (var j = 0; j < set[0].length; j++) {
    if (typeof set[0][j] !== 'string')
      return true
  }

  return false
};

glob.Glob = Glob;
inherits(Glob, EE);
function Glob (pattern, options, cb) {
  if (typeof options === 'function') {
    cb = options;
    options = null;
  }

  if (options && options.sync) {
    if (cb)
      throw new TypeError('callback provided to sync glob')
    return new GlobSync(pattern, options)
  }

  if (!(this instanceof Glob))
    return new Glob(pattern, options, cb)

  setopts(this, pattern, options);
  this._didRealPath = false;

  // process each pattern in the minimatch set
  var n = this.minimatch.set.length;

  // The matches are stored as {<filename>: true,...} so that
  // duplicates are automagically pruned.
  // Later, we do an Object.keys() on these.
  // Keep them as a list so we can fill in when nonull is set.
  this.matches = new Array(n);

  if (typeof cb === 'function') {
    cb = once_1(cb);
    this.on('error', cb);
    this.on('end', function (matches) {
      cb(null, matches);
    });
  }

  var self = this;
  this._processing = 0;

  this._emitQueue = [];
  this._processQueue = [];
  this.paused = false;

  if (this.noprocess)
    return this

  if (n === 0)
    return done()

  var sync = true;
  for (var i = 0; i < n; i ++) {
    this._process(this.minimatch.set[i], i, false, done);
  }
  sync = false;

  function done () {
    --self._processing;
    if (self._processing <= 0) {
      if (sync) {
        process.nextTick(function () {
          self._finish();
        });
      } else {
        self._finish();
      }
    }
  }
}

Glob.prototype._finish = function () {
  assert__default['default'](this instanceof Glob);
  if (this.aborted)
    return

  if (this.realpath && !this._didRealpath)
    return this._realpath()

  common.finish(this);
  this.emit('end', this.found);
};

Glob.prototype._realpath = function () {
  if (this._didRealpath)
    return

  this._didRealpath = true;

  var n = this.matches.length;
  if (n === 0)
    return this._finish()

  var self = this;
  for (var i = 0; i < this.matches.length; i++)
    this._realpathSet(i, next);

  function next () {
    if (--n === 0)
      self._finish();
  }
};

Glob.prototype._realpathSet = function (index, cb) {
  var matchset = this.matches[index];
  if (!matchset)
    return cb()

  var found = Object.keys(matchset);
  var self = this;
  var n = found.length;

  if (n === 0)
    return cb()

  var set = this.matches[index] = Object.create(null);
  found.forEach(function (p, i) {
    // If there's a problem with the stat, then it means that
    // one or more of the links in the realpath couldn't be
    // resolved.  just return the abs value in that case.
    p = self._makeAbs(p);
    fs_realpath.realpath(p, self.realpathCache, function (er, real) {
      if (!er)
        set[real] = true;
      else if (er.syscall === 'stat')
        set[p] = true;
      else
        self.emit('error', er); // srsly wtf right here

      if (--n === 0) {
        self.matches[index] = set;
        cb();
      }
    });
  });
};

Glob.prototype._mark = function (p) {
  return common.mark(this, p)
};

Glob.prototype._makeAbs = function (f) {
  return common.makeAbs(this, f)
};

Glob.prototype.abort = function () {
  this.aborted = true;
  this.emit('abort');
};

Glob.prototype.pause = function () {
  if (!this.paused) {
    this.paused = true;
    this.emit('pause');
  }
};

Glob.prototype.resume = function () {
  if (this.paused) {
    this.emit('resume');
    this.paused = false;
    if (this._emitQueue.length) {
      var eq = this._emitQueue.slice(0);
      this._emitQueue.length = 0;
      for (var i = 0; i < eq.length; i ++) {
        var e = eq[i];
        this._emitMatch(e[0], e[1]);
      }
    }
    if (this._processQueue.length) {
      var pq = this._processQueue.slice(0);
      this._processQueue.length = 0;
      for (var i = 0; i < pq.length; i ++) {
        var p = pq[i];
        this._processing--;
        this._process(p[0], p[1], p[2], p[3]);
      }
    }
  }
};

Glob.prototype._process = function (pattern, index, inGlobStar, cb) {
  assert__default['default'](this instanceof Glob);
  assert__default['default'](typeof cb === 'function');

  if (this.aborted)
    return

  this._processing++;
  if (this.paused) {
    this._processQueue.push([pattern, index, inGlobStar, cb]);
    return
  }

  //console.error('PROCESS %d', this._processing, pattern)

  // Get the first [n] parts of pattern that are all strings.
  var n = 0;
  while (typeof pattern[n] === 'string') {
    n ++;
  }
  // now n is the index of the first one that is *not* a string.

  // see if there's anything else
  var prefix;
  switch (n) {
    // if not, then this is rather simple
    case pattern.length:
      this._processSimple(pattern.join('/'), index, cb);
      return

    case 0:
      // pattern *starts* with some non-trivial item.
      // going to readdir(cwd), but not include the prefix in matches.
      prefix = null;
      break

    default:
      // pattern has some string bits in the front.
      // whatever it starts with, whether that's 'absolute' like /foo/bar,
      // or 'relative' like '../baz'
      prefix = pattern.slice(0, n).join('/');
      break
  }

  var remain = pattern.slice(n);

  // get the list of entries.
  var read;
  if (prefix === null)
    read = '.';
  else if (pathIsAbsolute(prefix) || pathIsAbsolute(pattern.join('/'))) {
    if (!prefix || !pathIsAbsolute(prefix))
      prefix = '/' + prefix;
    read = prefix;
  } else
    read = prefix;

  var abs = this._makeAbs(read);

  //if ignored, skip _processing
  if (childrenIgnored(this, read))
    return cb()

  var isGlobStar = remain[0] === minimatch_1.GLOBSTAR;
  if (isGlobStar)
    this._processGlobStar(prefix, read, abs, remain, index, inGlobStar, cb);
  else
    this._processReaddir(prefix, read, abs, remain, index, inGlobStar, cb);
};

Glob.prototype._processReaddir = function (prefix, read, abs, remain, index, inGlobStar, cb) {
  var self = this;
  this._readdir(abs, inGlobStar, function (er, entries) {
    return self._processReaddir2(prefix, read, abs, remain, index, inGlobStar, entries, cb)
  });
};

Glob.prototype._processReaddir2 = function (prefix, read, abs, remain, index, inGlobStar, entries, cb) {

  // if the abs isn't a dir, then nothing can match!
  if (!entries)
    return cb()

  // It will only match dot entries if it starts with a dot, or if
  // dot is set.  Stuff like @(.foo|.bar) isn't allowed.
  var pn = remain[0];
  var negate = !!this.minimatch.negate;
  var rawGlob = pn._glob;
  var dotOk = this.dot || rawGlob.charAt(0) === '.';

  var matchedEntries = [];
  for (var i = 0; i < entries.length; i++) {
    var e = entries[i];
    if (e.charAt(0) !== '.' || dotOk) {
      var m;
      if (negate && !prefix) {
        m = !e.match(pn);
      } else {
        m = e.match(pn);
      }
      if (m)
        matchedEntries.push(e);
    }
  }

  //console.error('prd2', prefix, entries, remain[0]._glob, matchedEntries)

  var len = matchedEntries.length;
  // If there are no matched entries, then nothing matches.
  if (len === 0)
    return cb()

  // if this is the last remaining pattern bit, then no need for
  // an additional stat *unless* the user has specified mark or
  // stat explicitly.  We know they exist, since readdir returned
  // them.

  if (remain.length === 1 && !this.mark && !this.stat) {
    if (!this.matches[index])
      this.matches[index] = Object.create(null);

    for (var i = 0; i < len; i ++) {
      var e = matchedEntries[i];
      if (prefix) {
        if (prefix !== '/')
          e = prefix + '/' + e;
        else
          e = prefix + e;
      }

      if (e.charAt(0) === '/' && !this.nomount) {
        e = path__default['default'].join(this.root, e);
      }
      this._emitMatch(index, e);
    }
    // This was the last one, and no stats were needed
    return cb()
  }

  // now test all matched entries as stand-ins for that part
  // of the pattern.
  remain.shift();
  for (var i = 0; i < len; i ++) {
    var e = matchedEntries[i];
    if (prefix) {
      if (prefix !== '/')
        e = prefix + '/' + e;
      else
        e = prefix + e;
    }
    this._process([e].concat(remain), index, inGlobStar, cb);
  }
  cb();
};

Glob.prototype._emitMatch = function (index, e) {
  if (this.aborted)
    return

  if (isIgnored(this, e))
    return

  if (this.paused) {
    this._emitQueue.push([index, e]);
    return
  }

  var abs = pathIsAbsolute(e) ? e : this._makeAbs(e);

  if (this.mark)
    e = this._mark(e);

  if (this.absolute)
    e = abs;

  if (this.matches[index][e])
    return

  if (this.nodir) {
    var c = this.cache[abs];
    if (c === 'DIR' || Array.isArray(c))
      return
  }

  this.matches[index][e] = true;

  var st = this.statCache[abs];
  if (st)
    this.emit('stat', e, st);

  this.emit('match', e);
};

Glob.prototype._readdirInGlobStar = function (abs, cb) {
  if (this.aborted)
    return

  // follow all symlinked directories forever
  // just proceed as if this is a non-globstar situation
  if (this.follow)
    return this._readdir(abs, false, cb)

  var lstatkey = 'lstat\0' + abs;
  var self = this;
  var lstatcb = inflight_1(lstatkey, lstatcb_);

  if (lstatcb)
    fs__default['default'].lstat(abs, lstatcb);

  function lstatcb_ (er, lstat) {
    if (er && er.code === 'ENOENT')
      return cb()

    var isSym = lstat && lstat.isSymbolicLink();
    self.symlinks[abs] = isSym;

    // If it's not a symlink or a dir, then it's definitely a regular file.
    // don't bother doing a readdir in that case.
    if (!isSym && lstat && !lstat.isDirectory()) {
      self.cache[abs] = 'FILE';
      cb();
    } else
      self._readdir(abs, false, cb);
  }
};

Glob.prototype._readdir = function (abs, inGlobStar, cb) {
  if (this.aborted)
    return

  cb = inflight_1('readdir\0'+abs+'\0'+inGlobStar, cb);
  if (!cb)
    return

  //console.error('RD %j %j', +inGlobStar, abs)
  if (inGlobStar && !ownProp(this.symlinks, abs))
    return this._readdirInGlobStar(abs, cb)

  if (ownProp(this.cache, abs)) {
    var c = this.cache[abs];
    if (!c || c === 'FILE')
      return cb()

    if (Array.isArray(c))
      return cb(null, c)
  }
  fs__default['default'].readdir(abs, readdirCb(this, abs, cb));
};

function readdirCb (self, abs, cb) {
  return function (er, entries) {
    if (er)
      self._readdirError(abs, er, cb);
    else
      self._readdirEntries(abs, entries, cb);
  }
}

Glob.prototype._readdirEntries = function (abs, entries, cb) {
  if (this.aborted)
    return

  // if we haven't asked to stat everything, then just
  // assume that everything in there exists, so we can avoid
  // having to stat it a second time.
  if (!this.mark && !this.stat) {
    for (var i = 0; i < entries.length; i ++) {
      var e = entries[i];
      if (abs === '/')
        e = abs + e;
      else
        e = abs + '/' + e;
      this.cache[e] = true;
    }
  }

  this.cache[abs] = entries;
  return cb(null, entries)
};

Glob.prototype._readdirError = function (f, er, cb) {
  if (this.aborted)
    return

  // handle errors, and cache the information
  switch (er.code) {
    case 'ENOTSUP': // https://github.com/isaacs/node-glob/issues/205
    case 'ENOTDIR': // totally normal. means it *does* exist.
      var abs = this._makeAbs(f);
      this.cache[abs] = 'FILE';
      if (abs === this.cwdAbs) {
        var error = new Error(er.code + ' invalid cwd ' + this.cwd);
        error.path = this.cwd;
        error.code = er.code;
        this.emit('error', error);
        this.abort();
      }
      break

    case 'ENOENT': // not terribly unusual
    case 'ELOOP':
    case 'ENAMETOOLONG':
    case 'UNKNOWN':
      this.cache[this._makeAbs(f)] = false;
      break

    default: // some unusual error.  Treat as failure.
      this.cache[this._makeAbs(f)] = false;
      if (this.strict) {
        this.emit('error', er);
        // If the error is handled, then we abort
        // if not, we threw out of here
        this.abort();
      }
      if (!this.silent)
        console.error('glob error', er);
      break
  }

  return cb()
};

Glob.prototype._processGlobStar = function (prefix, read, abs, remain, index, inGlobStar, cb) {
  var self = this;
  this._readdir(abs, inGlobStar, function (er, entries) {
    self._processGlobStar2(prefix, read, abs, remain, index, inGlobStar, entries, cb);
  });
};


Glob.prototype._processGlobStar2 = function (prefix, read, abs, remain, index, inGlobStar, entries, cb) {
  //console.error('pgs2', prefix, remain[0], entries)

  // no entries means not a dir, so it can never have matches
  // foo.txt/** doesn't match foo.txt
  if (!entries)
    return cb()

  // test without the globstar, and with every child both below
  // and replacing the globstar.
  var remainWithoutGlobStar = remain.slice(1);
  var gspref = prefix ? [ prefix ] : [];
  var noGlobStar = gspref.concat(remainWithoutGlobStar);

  // the noGlobStar pattern exits the inGlobStar state
  this._process(noGlobStar, index, false, cb);

  var isSym = this.symlinks[abs];
  var len = entries.length;

  // If it's a symlink, and we're in a globstar, then stop
  if (isSym && inGlobStar)
    return cb()

  for (var i = 0; i < len; i++) {
    var e = entries[i];
    if (e.charAt(0) === '.' && !this.dot)
      continue

    // these two cases enter the inGlobStar state
    var instead = gspref.concat(entries[i], remainWithoutGlobStar);
    this._process(instead, index, true, cb);

    var below = gspref.concat(entries[i], remain);
    this._process(below, index, true, cb);
  }

  cb();
};

Glob.prototype._processSimple = function (prefix, index, cb) {
  // XXX review this.  Shouldn't it be doing the mounting etc
  // before doing stat?  kinda weird?
  var self = this;
  this._stat(prefix, function (er, exists) {
    self._processSimple2(prefix, index, er, exists, cb);
  });
};
Glob.prototype._processSimple2 = function (prefix, index, er, exists, cb) {

  //console.error('ps2', prefix, exists)

  if (!this.matches[index])
    this.matches[index] = Object.create(null);

  // If it doesn't exist, then just mark the lack of results
  if (!exists)
    return cb()

  if (prefix && pathIsAbsolute(prefix) && !this.nomount) {
    var trail = /[\/\\]$/.test(prefix);
    if (prefix.charAt(0) === '/') {
      prefix = path__default['default'].join(this.root, prefix);
    } else {
      prefix = path__default['default'].resolve(this.root, prefix);
      if (trail)
        prefix += '/';
    }
  }

  if (process.platform === 'win32')
    prefix = prefix.replace(/\\/g, '/');

  // Mark this as a match
  this._emitMatch(index, prefix);
  cb();
};

// Returns either 'DIR', 'FILE', or false
Glob.prototype._stat = function (f, cb) {
  var abs = this._makeAbs(f);
  var needDir = f.slice(-1) === '/';

  if (f.length > this.maxLength)
    return cb()

  if (!this.stat && ownProp(this.cache, abs)) {
    var c = this.cache[abs];

    if (Array.isArray(c))
      c = 'DIR';

    // It exists, but maybe not how we need it
    if (!needDir || c === 'DIR')
      return cb(null, c)

    if (needDir && c === 'FILE')
      return cb()

    // otherwise we have to stat, because maybe c=true
    // if we know it exists, but not what it is.
  }
  var stat = this.statCache[abs];
  if (stat !== undefined) {
    if (stat === false)
      return cb(null, stat)
    else {
      var type = stat.isDirectory() ? 'DIR' : 'FILE';
      if (needDir && type === 'FILE')
        return cb()
      else
        return cb(null, type, stat)
    }
  }

  var self = this;
  var statcb = inflight_1('stat\0' + abs, lstatcb_);
  if (statcb)
    fs__default['default'].lstat(abs, statcb);

  function lstatcb_ (er, lstat) {
    if (lstat && lstat.isSymbolicLink()) {
      // If it's a symlink, then treat it as the target, unless
      // the target does not exist, then treat it as a file.
      return fs__default['default'].stat(abs, function (er, stat) {
        if (er)
          self._stat2(f, abs, null, lstat, cb);
        else
          self._stat2(f, abs, er, stat, cb);
      })
    } else {
      self._stat2(f, abs, er, lstat, cb);
    }
  }
};

Glob.prototype._stat2 = function (f, abs, er, stat, cb) {
  if (er && (er.code === 'ENOENT' || er.code === 'ENOTDIR')) {
    this.statCache[abs] = false;
    return cb()
  }

  var needDir = f.slice(-1) === '/';
  this.statCache[abs] = stat;

  if (abs.slice(-1) === '/' && stat && !stat.isDirectory())
    return cb(null, false, stat)

  var c = true;
  if (stat)
    c = stat.isDirectory() ? 'DIR' : 'FILE';
  this.cache[abs] = this.cache[abs] || c;

  if (needDir && c === 'FILE')
    return cb()

  return cb(null, c, stat)
};

var rimraf_1 = rimraf;
rimraf.sync = rimrafSync;





var _0666 = parseInt('666', 8);

var defaultGlobOpts = {
  nosort: true,
  silent: true
};

// for EMFILE handling
var timeout = 0;

var isWindows = (process.platform === "win32");

function defaults (options) {
  var methods = [
    'unlink',
    'chmod',
    'stat',
    'lstat',
    'rmdir',
    'readdir'
  ];
  methods.forEach(function(m) {
    options[m] = options[m] || fs__default['default'][m];
    m = m + 'Sync';
    options[m] = options[m] || fs__default['default'][m];
  });

  options.maxBusyTries = options.maxBusyTries || 3;
  options.emfileWait = options.emfileWait || 1000;
  if (options.glob === false) {
    options.disableGlob = true;
  }
  options.disableGlob = options.disableGlob || false;
  options.glob = options.glob || defaultGlobOpts;
}

function rimraf (p, options, cb) {
  if (typeof options === 'function') {
    cb = options;
    options = {};
  }

  assert__default['default'](p, 'rimraf: missing path');
  assert__default['default'].equal(typeof p, 'string', 'rimraf: path should be a string');
  assert__default['default'].equal(typeof cb, 'function', 'rimraf: callback function required');
  assert__default['default'](options, 'rimraf: invalid options argument provided');
  assert__default['default'].equal(typeof options, 'object', 'rimraf: options should be object');

  defaults(options);

  var busyTries = 0;
  var errState = null;
  var n = 0;

  if (options.disableGlob || !glob_1.hasMagic(p))
    return afterGlob(null, [p])

  options.lstat(p, function (er, stat) {
    if (!er)
      return afterGlob(null, [p])

    glob_1(p, options.glob, afterGlob);
  });

  function next (er) {
    errState = errState || er;
    if (--n === 0)
      cb(errState);
  }

  function afterGlob (er, results) {
    if (er)
      return cb(er)

    n = results.length;
    if (n === 0)
      return cb()

    results.forEach(function (p) {
      rimraf_(p, options, function CB (er) {
        if (er) {
          if ((er.code === "EBUSY" || er.code === "ENOTEMPTY" || er.code === "EPERM") &&
              busyTries < options.maxBusyTries) {
            busyTries ++;
            var time = busyTries * 100;
            // try again, with the same exact callback as this one.
            return setTimeout(function () {
              rimraf_(p, options, CB);
            }, time)
          }

          // this one won't happen if graceful-fs is used.
          if (er.code === "EMFILE" && timeout < options.emfileWait) {
            return setTimeout(function () {
              rimraf_(p, options, CB);
            }, timeout ++)
          }

          // already gone
          if (er.code === "ENOENT") er = null;
        }

        timeout = 0;
        next(er);
      });
    });
  }
}

// Two possible strategies.
// 1. Assume it's a file.  unlink it, then do the dir stuff on EPERM or EISDIR
// 2. Assume it's a directory.  readdir, then do the file stuff on ENOTDIR
//
// Both result in an extra syscall when you guess wrong.  However, there
// are likely far more normal files in the world than directories.  This
// is based on the assumption that a the average number of files per
// directory is >= 1.
//
// If anyone ever complains about this, then I guess the strategy could
// be made configurable somehow.  But until then, YAGNI.
function rimraf_ (p, options, cb) {
  assert__default['default'](p);
  assert__default['default'](options);
  assert__default['default'](typeof cb === 'function');

  // sunos lets the root user unlink directories, which is... weird.
  // so we have to lstat here and make sure it's not a dir.
  options.lstat(p, function (er, st) {
    if (er && er.code === "ENOENT")
      return cb(null)

    // Windows can EPERM on stat.  Life is suffering.
    if (er && er.code === "EPERM" && isWindows)
      fixWinEPERM(p, options, er, cb);

    if (st && st.isDirectory())
      return rmdir(p, options, er, cb)

    options.unlink(p, function (er) {
      if (er) {
        if (er.code === "ENOENT")
          return cb(null)
        if (er.code === "EPERM")
          return (isWindows)
            ? fixWinEPERM(p, options, er, cb)
            : rmdir(p, options, er, cb)
        if (er.code === "EISDIR")
          return rmdir(p, options, er, cb)
      }
      return cb(er)
    });
  });
}

function fixWinEPERM (p, options, er, cb) {
  assert__default['default'](p);
  assert__default['default'](options);
  assert__default['default'](typeof cb === 'function');
  if (er)
    assert__default['default'](er instanceof Error);

  options.chmod(p, _0666, function (er2) {
    if (er2)
      cb(er2.code === "ENOENT" ? null : er);
    else
      options.stat(p, function(er3, stats) {
        if (er3)
          cb(er3.code === "ENOENT" ? null : er);
        else if (stats.isDirectory())
          rmdir(p, options, er, cb);
        else
          options.unlink(p, cb);
      });
  });
}

function fixWinEPERMSync (p, options, er) {
  assert__default['default'](p);
  assert__default['default'](options);
  if (er)
    assert__default['default'](er instanceof Error);

  try {
    options.chmodSync(p, _0666);
  } catch (er2) {
    if (er2.code === "ENOENT")
      return
    else
      throw er
  }

  try {
    var stats = options.statSync(p);
  } catch (er3) {
    if (er3.code === "ENOENT")
      return
    else
      throw er
  }

  if (stats.isDirectory())
    rmdirSync(p, options, er);
  else
    options.unlinkSync(p);
}

function rmdir (p, options, originalEr, cb) {
  assert__default['default'](p);
  assert__default['default'](options);
  if (originalEr)
    assert__default['default'](originalEr instanceof Error);
  assert__default['default'](typeof cb === 'function');

  // try to rmdir first, and only readdir on ENOTEMPTY or EEXIST (SunOS)
  // if we guessed wrong, and it's not a directory, then
  // raise the original error.
  options.rmdir(p, function (er) {
    if (er && (er.code === "ENOTEMPTY" || er.code === "EEXIST" || er.code === "EPERM"))
      rmkids(p, options, cb);
    else if (er && er.code === "ENOTDIR")
      cb(originalEr);
    else
      cb(er);
  });
}

function rmkids(p, options, cb) {
  assert__default['default'](p);
  assert__default['default'](options);
  assert__default['default'](typeof cb === 'function');

  options.readdir(p, function (er, files) {
    if (er)
      return cb(er)
    var n = files.length;
    if (n === 0)
      return options.rmdir(p, cb)
    var errState;
    files.forEach(function (f) {
      rimraf(path__default['default'].join(p, f), options, function (er) {
        if (errState)
          return
        if (er)
          return cb(errState = er)
        if (--n === 0)
          options.rmdir(p, cb);
      });
    });
  });
}

// this looks simpler, and is strictly *faster*, but will
// tie up the JavaScript thread and fail on excessively
// deep directory trees.
function rimrafSync (p, options) {
  options = options || {};
  defaults(options);

  assert__default['default'](p, 'rimraf: missing path');
  assert__default['default'].equal(typeof p, 'string', 'rimraf: path should be a string');
  assert__default['default'](options, 'rimraf: missing options');
  assert__default['default'].equal(typeof options, 'object', 'rimraf: options should be object');

  var results;

  if (options.disableGlob || !glob_1.hasMagic(p)) {
    results = [p];
  } else {
    try {
      options.lstatSync(p);
      results = [p];
    } catch (er) {
      results = glob_1.sync(p, options.glob);
    }
  }

  if (!results.length)
    return

  for (var i = 0; i < results.length; i++) {
    var p = results[i];

    try {
      var st = options.lstatSync(p);
    } catch (er) {
      if (er.code === "ENOENT")
        return

      // Windows can EPERM on stat.  Life is suffering.
      if (er.code === "EPERM" && isWindows)
        fixWinEPERMSync(p, options, er);
    }

    try {
      // sunos lets the root user unlink directories, which is... weird.
      if (st && st.isDirectory())
        rmdirSync(p, options, null);
      else
        options.unlinkSync(p);
    } catch (er) {
      if (er.code === "ENOENT")
        return
      if (er.code === "EPERM")
        return isWindows ? fixWinEPERMSync(p, options, er) : rmdirSync(p, options, er)
      if (er.code !== "EISDIR")
        throw er

      rmdirSync(p, options, er);
    }
  }
}

function rmdirSync (p, options, originalEr) {
  assert__default['default'](p);
  assert__default['default'](options);
  if (originalEr)
    assert__default['default'](originalEr instanceof Error);

  try {
    options.rmdirSync(p);
  } catch (er) {
    if (er.code === "ENOENT")
      return
    if (er.code === "ENOTDIR")
      throw originalEr
    if (er.code === "ENOTEMPTY" || er.code === "EEXIST" || er.code === "EPERM")
      rmkidsSync(p, options);
  }
}

function rmkidsSync (p, options) {
  assert__default['default'](p);
  assert__default['default'](options);
  options.readdirSync(p).forEach(function (f) {
    rimrafSync(path__default['default'].join(p, f), options);
  });

  // We only end up here once we got ENOTEMPTY at least once, and
  // at this point, we are guaranteed to have removed all the kids.
  // So, we know that it won't be ENOENT or ENOTDIR or anything else.
  // try really hard to delete stuff on windows, because it has a
  // PROFOUNDLY annoying habit of not closing handles promptly when
  // files are deleted, resulting in spurious ENOTEMPTY errors.
  var retries = isWindows ? 100 : 1;
  var i = 0;
  do {
    var threw = true;
    try {
      var ret = options.rmdirSync(p, options);
      threw = false;
      return ret
    } finally {
      if (++i < retries && threw)
        continue
    }
  } while (true)
}

var _0777 = parseInt('0777', 8);

var mkdirp = mkdirP.mkdirp = mkdirP.mkdirP = mkdirP;

function mkdirP (p, opts, f, made) {
    if (typeof opts === 'function') {
        f = opts;
        opts = {};
    }
    else if (!opts || typeof opts !== 'object') {
        opts = { mode: opts };
    }
    
    var mode = opts.mode;
    var xfs = opts.fs || fs__default['default'];
    
    if (mode === undefined) {
        mode = _0777;
    }
    if (!made) made = null;
    
    var cb = f || function () {};
    p = path__default['default'].resolve(p);
    
    xfs.mkdir(p, mode, function (er) {
        if (!er) {
            made = made || p;
            return cb(null, made);
        }
        switch (er.code) {
            case 'ENOENT':
                if (path__default['default'].dirname(p) === p) return cb(er);
                mkdirP(path__default['default'].dirname(p), opts, function (er, made) {
                    if (er) cb(er, made);
                    else mkdirP(p, opts, cb, made);
                });
                break;

            // In the case of any other error, just see if there's a dir
            // there already.  If so, then hooray!  If not, then something
            // is borked.
            default:
                xfs.stat(p, function (er2, stat) {
                    // if the stat fails, then that's super weird.
                    // let the original error be the failure reason.
                    if (er2 || !stat.isDirectory()) cb(er, made);
                    else cb(null, made);
                });
                break;
        }
    });
}

mkdirP.sync = function sync (p, opts, made) {
    if (!opts || typeof opts !== 'object') {
        opts = { mode: opts };
    }
    
    var mode = opts.mode;
    var xfs = opts.fs || fs__default['default'];
    
    if (mode === undefined) {
        mode = _0777;
    }
    if (!made) made = null;

    p = path__default['default'].resolve(p);

    try {
        xfs.mkdirSync(p, mode);
        made = made || p;
    }
    catch (err0) {
        switch (err0.code) {
            case 'ENOENT' :
                made = sync(path__default['default'].dirname(p), opts, made);
                sync(p, opts, made);
                break;

            // In the case of any other error, just see if there's a dir
            // there already.  If so, then hooray!  If not, then something
            // is borked.
            default:
                var stat;
                try {
                    stat = xfs.statSync(p);
                }
                catch (err1) {
                    throw err0;
                }
                if (!stat.isDirectory()) throw err0;
                break;
        }
    }

    return made;
};

var temp = createCommonjsModule(function (module, exports) {
os__default['default'].tmpdir();

const rimrafSync = rimraf_1.sync;

//== helpers
//
let dir = path__default['default'].resolve(os__default['default'].tmpdir());

let RDWR_EXCL = cnst__default['default'].O_CREAT | cnst__default['default'].O_TRUNC | cnst__default['default'].O_RDWR | cnst__default['default'].O_EXCL;

let promisify = function(callback) {
  if (typeof callback === 'function') {
    return [undefined, callback];
  }

  var promiseCallback;
  var promise = new Promise(function(resolve, reject) {
    promiseCallback = function() {
      var args = Array.from(arguments);
      var err = args.shift();

      process.nextTick(function() {
        if (err) {
          reject(err);
        } else if (args.length === 1) {
          resolve(args[0]);
        } else {
          resolve(args);
        }
      });
    };
  });

  return [promise, promiseCallback];
};

var generateName = function(rawAffixes, defaultPrefix) {
  var affixes = parseAffixes(rawAffixes, defaultPrefix);
  var now = new Date();
  var name = [affixes.prefix,
              now.getFullYear(), now.getMonth(), now.getDate(),
              '-',
              process.pid,
              '-',
              (Math.random() * 0x100000000 + 1).toString(36),
              affixes.suffix].join('');
  return path__default['default'].join(affixes.dir || dir, name);
};

var parseAffixes = function(rawAffixes, defaultPrefix) {
  var affixes = {prefix: null, suffix: null};
  if(rawAffixes) {
    switch (typeof(rawAffixes)) {
    case 'string':
      affixes.prefix = rawAffixes;
      break;
    case 'object':
      affixes = rawAffixes;
      break;
    default:
      throw new Error("Unknown affix declaration: " + affixes);
    }
  } else {
    affixes.prefix = defaultPrefix;
  }
  return affixes;
};

/* -------------------------------------------------------------------------
 * Don't forget to call track() if you want file tracking and exit handlers!
 * -------------------------------------------------------------------------
 * When any temp file or directory is created, it is added to filesToDelete
 * or dirsToDelete. The first time any temp file is created, a listener is
 * added to remove all temp files and directories at exit.
 */
var tracking = false;
var track = function(value) {
  tracking = (value !== false);
  return module.exports; // chainable
};
var exitListenerAttached = false;
var filesToDelete = [];
var dirsToDelete = [];

function deleteFileOnExit(filePath) {
  if (!tracking) return false;
  attachExitListener();
  filesToDelete.push(filePath);
}

function deleteDirOnExit(dirPath) {
  if (!tracking) return false;
  attachExitListener();
  dirsToDelete.push(dirPath);
}

function attachExitListener() {
  if (!tracking) return false;
  if (!exitListenerAttached) {
    process.addListener('exit', function() {
        try {
            cleanupSync();
        } catch(err) {
            console.warn("Fail to clean temporary files on exit : ", err);
            throw err;
        }
    });
    exitListenerAttached = true;
  }
}

function cleanupFilesSync() {
  if (!tracking) {
    return false;
  }
  var count = 0;
  var toDelete;
  while ((toDelete = filesToDelete.shift()) !== undefined) {
    rimrafSync(toDelete, { maxBusyTries: 6 });
    count++;
  }
  return count;
}

function cleanupFiles(callback) {
  var p = promisify(callback);
  var promise = p[0];
  callback = p[1];

  if (!tracking) {
    callback(new Error("not tracking"));
    return promise;
  }
  var count = 0;
  var left = filesToDelete.length;
  if (!left) {
    callback(null, count);
    return promise;
  }
  var toDelete;
  var rimrafCallback = function(err) {
    if (!left) {
      // Prevent processing if aborted
      return;
    }
    if (err) {
      // This shouldn't happen; pass error to callback and abort
      // processing
      callback(err);
      left = 0;
      return;
    } else {
      count++;
    }
    left--;
    if (!left) {
      callback(null, count);
    }
  };
  while ((toDelete = filesToDelete.shift()) !== undefined) {
    rimraf_1(toDelete, { maxBusyTries: 6 }, rimrafCallback);
  }
  return promise;
}

function cleanupDirsSync() {
  if (!tracking) {
    return false;
  }
  var count = 0;
  var toDelete;
  while ((toDelete = dirsToDelete.shift()) !== undefined) {
    rimrafSync(toDelete, { maxBusyTries: 6 });
    count++;
  }
  return count;
}

function cleanupDirs(callback) {
  var p = promisify(callback);
  var promise = p[0];
  callback = p[1];

  if (!tracking) {
    callback(new Error("not tracking"));
    return promise;
  }
  var count = 0;
  var left = dirsToDelete.length;
  if (!left) {
    callback(null, count);
    return promise;
  }
  var toDelete;
  var rimrafCallback = function (err) {
    if (!left) {
      // Prevent processing if aborted
      return;
    }
    if (err) {
      // rimraf handles most "normal" errors; pass the error to the
      // callback and abort processing
      callback(err, count);
      left = 0;
      return;
    } else {
      count++;
    }
    left--;
    if (!left) {
      callback(null, count);
    }
  };
  while ((toDelete = dirsToDelete.shift()) !== undefined) {
    rimraf_1(toDelete, { maxBusyTries: 6 }, rimrafCallback);
  }
  return promise;
}

function cleanupSync() {
  if (!tracking) {
    return false;
  }
  var fileCount = cleanupFilesSync();
  var dirCount  = cleanupDirsSync();
  return {files: fileCount, dirs: dirCount};
}

function cleanup(callback) {
  var p = promisify(callback);
  var promise = p[0];
  callback = p[1];

  if (!tracking) {
    callback(new Error("not tracking"));
    return promise;
  }
  cleanupFiles(function(fileErr, fileCount) {
    if (fileErr) {
      callback(fileErr, {files: fileCount});
    } else {
      cleanupDirs(function(dirErr, dirCount) {
        callback(dirErr, {files: fileCount, dirs: dirCount});
      });
    }
  });
  return promise;
}

//== directories
//
const mkdir = (affixes, callback) => {
  const p = promisify(callback);
  const promise = p[0];
  callback = p[1];

  let dirPath = generateName(affixes, 'd-');
  mkdirp(dirPath, 0o700, (err) => {
    if (!err) {
      deleteDirOnExit(dirPath);
    }
    callback(err, dirPath);
  });
  return promise;
};

const mkdirSync = (affixes) => {
  let dirPath = generateName(affixes, 'd-');
  mkdirp.sync(dirPath, 0o700);
  deleteDirOnExit(dirPath);
  return dirPath;
};

//== files
//
const open = (affixes, callback) => {
  const p = promisify(callback);
  const promise = p[0];
  callback = p[1];

  const path = generateName(affixes, 'f-');
  fs__default['default'].open(path, RDWR_EXCL, 0o600, (err, fd) => {
    if (!err) {
      deleteFileOnExit(path);
    }
    callback(err, { path, fd });
  });
  return promise;
};

const openSync = (affixes) => {
  const path = generateName(affixes, 'f-');
  let fd = fs__default['default'].openSync(path, RDWR_EXCL, 0o600);
  deleteFileOnExit(path);
  return { path, fd };
};

const createWriteStream =  (affixes) => {
  const path = generateName(affixes, 's-');
  let stream = fs__default['default'].createWriteStream(path, { flags: RDWR_EXCL, mode: 0o600 });
  deleteFileOnExit(path);
  return stream;
};

//== settings
//
exports.dir = dir;
exports.track = track;

//== functions
//
exports.mkdir = mkdir;
exports.mkdirSync = mkdirSync;
exports.open = open;
exports.openSync = openSync;
exports.path = generateName;
exports.cleanup = cleanup;
exports.cleanupSync = cleanupSync;
exports.createWriteStream = createWriteStream;
});

var mathJaxFontCSS = `
@font-face /* 0 */ {
  font-family: MJXZERO;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Zero.woff") format("woff");
}

@font-face /* 1 */ {
  font-family: MJXTEX;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Main-Regular.woff") format("woff");
}

@font-face /* 2 */ {
  font-family: MJXTEX-B;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Main-Bold.woff") format("woff");
}

@font-face /* 3 */ {
  font-family: MJXTEX-I;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Math-Italic.woff") format("woff");
}

@font-face /* 4 */ {
  font-family: MJXTEX-MI;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Main-Italic.woff") format("woff");
}

@font-face /* 5 */ {
  font-family: MJXTEX-BI;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Math-BoldItalic.woff") format("woff");
}

@font-face /* 6 */ {
  font-family: MJXTEX-S1;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Size1-Regular.woff") format("woff");
}

@font-face /* 7 */ {
  font-family: MJXTEX-S2;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Size2-Regular.woff") format("woff");
}

@font-face /* 8 */ {
  font-family: MJXTEX-S3;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Size3-Regular.woff") format("woff");
}

@font-face /* 9 */ {
  font-family: MJXTEX-S4;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Size4-Regular.woff") format("woff");
}

@font-face /* 10 */ {
  font-family: MJXTEX-A;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_AMS-Regular.woff") format("woff");
}

@font-face /* 11 */ {
  font-family: MJXTEX-C;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Calligraphic-Regular.woff") format("woff");
}

@font-face /* 12 */ {
  font-family: MJXTEX-CB;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Calligraphic-Bold.woff") format("woff");
}

@font-face /* 13 */ {
  font-family: MJXTEX-FR;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Fraktur-Regular.woff") format("woff");
}

@font-face /* 14 */ {
  font-family: MJXTEX-FRB;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Fraktur-Bold.woff") format("woff");
}

@font-face /* 15 */ {
  font-family: MJXTEX-SS;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_SansSerif-Regular.woff") format("woff");
}

@font-face /* 16 */ {
  font-family: MJXTEX-SSB;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_SansSerif-Bold.woff") format("woff");
}

@font-face /* 17 */ {
  font-family: MJXTEX-SSI;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_SansSerif-Italic.woff") format("woff");
}

@font-face /* 18 */ {
  font-family: MJXTEX-SC;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Script-Regular.woff") format("woff");
}

@font-face /* 19 */ {
  font-family: MJXTEX-T;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Typewriter-Regular.woff") format("woff");
}

@font-face /* 20 */ {
  font-family: MJXTEX-V;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Vector-Regular.woff") format("woff");
}

@font-face /* 21 */ {
  font-family: MJXTEX-VB;
  src: url("http://cdn.mathjax.org/mathjax/latest/fonts/HTML-CSS/TeX/woff/MathJax_Vector-Bold.woff") format("woff");
}`;

// This CSS is composed of Prism.css and a small amount of Obsidian CSS,
// which is copyrighted by the Obsidian developers.
// I've received permission from @Licat on Discord to include this snippet in the plugin
// and HTML exports from it.
// See https://discord.com/channels/686053708261228577/707816848615407697/830630553883377690
function variables(light = true) {
    if (light)
        return `
:root {
  --default-font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Microsoft YaHei Light", sans-serif;
  --font-monospace: 'Source Code Pro', monospace;
  --background-primary: #ffffff;
  --background-modifier-border: #ddd;
  --text-accent: #705dcf;
  --text-accent-hover: #7a6ae6;
  --text-normal: #2e3338;
  --background-secondary: #f2f3f5;
  --background-secondary-alt: #e3e5e8;
  --text-muted: #888888;
}`;
    else
        return `
:root {
  --background-primary: #202020;
  --background-modifier-border: #333;
  --text-accent: #7f6df2;
  --text-accent-hover: #8875ff;
  --text-normal: #dcddde;
  --background-secondary: #161616;
  --background-secondary-alt: #000000;
  --text-muted: #999;
}
`;
}
function appCSS (light = true) {
    return variables(light) + body();
}
function body() {
    return `
pre, code {
  font-family: var(--font-monospace);
}
h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
}
a {
  color: var(--text-accent);
  outline: none;
}
a:hover {
  color: var(--text-accent-hover);
}
audio {
  outline: none;
}
hr {
  border: none;
  border-top: 1px solid;
  border-color: var(--background-modifier-border);
  margin: 26px 0;
}
* {
  box-sizing: border-box;
}
body {
  text-rendering: optimizeLegibility;
  font-family: var(--default-font);
  line-height: 1.5em;
  font-size: 16px;
  background-color: var(--background-primary);
  color: var(--text-normal);
}
ul ul, ol ul, ol ul, ul ol {
  list-style-type: disc;
}



  /* PrismJS 1.20.0
https://prismjs.com/download.html#themes=prism&languages=markup+css+clike+javascript+abap+abnf+actionscript+ada+al+antlr4+apacheconf+apl+applescript+aql+arduino+arff+asciidoc+asm6502+aspnet+autohotkey+autoit+bash+basic+batch+bbcode+bison+bnf+brainfuck+brightscript+bro+c+concurnas+csharp+cpp+cil+coffeescript+cmake+clojure+crystal+csp+css-extras+d+dart+dax+diff+django+dns-zone-file+docker+ebnf+eiffel+ejs+elixir+elm+etlua+erb+erlang+excel-formula+fsharp+factor+firestore-security-rules+flow+fortran+ftl+gcode+gdscript+gedcom+gherkin+git+glsl+gml+go+graphql+groovy+haml+handlebars+haskell+haxe+hcl+hlsl+http+hpkp+hsts+ichigojam+icon+iecst+inform7+ini+io+j+java+javadoc+javadoclike+javastacktrace+jolie+jq+jsdoc+js-extras+js-templates+json+jsonp+json5+julia+keyman+kotlin+latex+latte+less+lilypond+liquid+lisp+livescript+llvm+lolcode+lua+makefile+markdown+markup-templating+matlab+mel+mizar+monkey+moonscript+n1ql+n4js+nand2tetris-hdl+nasm+neon+nginx+nim+nix+nsis+objectivec+ocaml+opencl+oz+parigp+parser+pascal+pascaligo+pcaxis+peoplecode+perl+php+phpdoc+php-extras+plsql+powerquery+powershell+processing+prolog+properties+protobuf+pug+puppet+pure+purebasic+python+q+qml+qore+r+racket+jsx+tsx+renpy+reason+regex+rest+rip+roboconf+robotframework+ruby+rust+sas+sass+scss+scala+scheme+shell-session+smalltalk+smarty+solidity+solution-file+soy+sparql+splunk-spl+sqf+sql+stylus+swift+tap+tcl+textile+toml+tt2+turtle+twig+typescript+t4-cs+t4-vb+t4-templating+unrealscript+vala+vbnet+velocity+verilog+vhdl+vim+visual-basic+warpscript+wasm+wiki+xeora+xml-doc+xojo+xquery+yaml+zig */
  /**
     * prism.js default theme for JavaScript, CSS and HTML
     * Based on dabblet (http://dabblet.com)
     * @author Lea Verou
     */
  /* Code blocks */
  /* Inline code */
code[class*="language-"],
pre[class*="language-"] {
  color: black;
  background: none;
  text-shadow: 0 1px white;
  font-family: var(--font-monospace);
  text-align: left;
  white-space: pre;
  word-spacing: normal;
  word-break: normal;
  word-wrap: normal;
  line-height: 1.5;
  -moz-tab-size: 4;
  -o-tab-size: 4;
  tab-size: 4;
  -webkit-hyphens: none;
  -moz-hyphens: none;
  -ms-hyphens: none;
  hyphens: none;
}
pre[class*="language-"]::-moz-selection,
pre[class*="language-"] ::-moz-selection,
code[class*="language-"]::-moz-selection,
code[class*="language-"] ::-moz-selection {
  text-shadow: none;
  background: #b3d4fc;
}
pre[class*="language-"]::selection,
pre[class*="language-"] ::selection,
code[class*="language-"]::selection,
code[class*="language-"] ::selection {
  text-shadow: none;
  background: #b3d4fc;
}
@media print {
  code[class*="language-"],
  pre[class*="language-"] {
    text-shadow: none;
  }
}
pre[class*="language-"] {
  padding: 1em;
  margin: 0.5em 0;
  overflow: auto;
}
:not(pre) > code[class*="language-"],
pre[class*="language-"] {
  background: #f5f2f0;
}
:not(pre) > code[class*="language-"] {
  padding: 0.1em;
  border-radius: 0.3em;
  white-space: normal;
}
.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
  color: slategray;
}
.token.punctuation {
  color: #999;
}
.token.namespace {
  opacity: 0.7;
}
.token.property,
.token.tag,
.token.boolean,
.token.number,
.token.constant,
.token.symbol,
.token.deleted {
  color: #905;
}
.token.selector,
.token.attr-name,
.token.string,
.token.char,
.token.builtin,
.token.inserted {
  color: #690;
}
.token.operator,
.token.entity,
.token.url,
.language-css .token.string,
.style .token.string {
  color: #9a6e3a;
  background: hsla(0, 0%, 100%, 0.5);
}
.token.atrule,
.token.attr-value,
.token.keyword {
  color: #07a;
}
.token.function,
.token.class-name {
  color: #DD4A68;
}
.token.regex,
.token.important,
.token.variable {
  color: #e90;
}
.token.important,
.token.bold {
  font-weight: bold;
}
.token.italic {
  font-style: italic;
}
.token.entity {
  cursor: help;
}

`;
}

/*
 * renderer.ts
 *
 * This module exposes a function that turns an Obsidian markdown string into
 * an HTML string with as many inconsistencies ironed out as possible
 *
 */
// Note: parentFiles is for internal use (to prevent recursively embedded notes)
// inputFile must be an absolute file path
function render(plugin, view, inputFile, outputFormat, parentFiles = []) {
    var _a;
    return __awaiter(this, void 0, void 0, function* () {
        // Use Obsidian's markdown renderer to render to a hidden <div>
        const markdown = view.data;
        const wrapper = document.createElement('div');
        wrapper.style.display = 'hidden';
        document.body.appendChild(wrapper);
        yield obsidian.MarkdownRenderer.renderMarkdown(markdown, wrapper, path__namespace.dirname(inputFile), view);
        // Post-process the HTML in-place
        yield postProcessRenderedHTML(plugin, inputFile, wrapper, outputFormat, parentFiles, yield mermaidCSS(plugin.settings, plugin.vaultBasePath()));
        let html = wrapper.innerHTML;
        document.body.removeChild(wrapper);
        // If it's a top level note, make the HTML a standalone document - inject CSS, a <title>, etc.
        const metadata = getYAMLMetadata(markdown);
        (_a = metadata.title) !== null && _a !== void 0 ? _a : (metadata.title = fileBaseName(inputFile));
        if (parentFiles.length === 0) {
            html = yield standaloneHTML(plugin.settings, html, metadata.title, plugin.vaultBasePath());
        }
        return { html, metadata };
    });
}
// Takes any file path like '/home/oliver/zettelkasten/Obsidian.md' and
// takes the base name, in this case 'Obsidian'
function fileBaseName(file) {
    return path__namespace.basename(file, path__namespace.extname(file));
}
function getYAMLMetadata(markdown) {
    markdown = markdown.trim();
    if (markdown.startsWith('---')) {
        const trailing = markdown.substring(3);
        const frontmatter = trailing.substring(0, trailing.indexOf('---')).trim();
        return parse$1(frontmatter);
    }
    return {};
}
function getCustomCSS(settings, vaultBasePath) {
    return __awaiter(this, void 0, void 0, function* () {
        if (!settings.customCSSFile)
            return;
        let file = settings.customCSSFile;
        let buffer = null;
        // Try absolute path
        try {
            let test = yield fs__namespace.promises.readFile(file);
            buffer = test;
        }
        catch (e) { }
        // Try relative path
        try {
            let test = yield fs__namespace.promises.readFile(path__namespace.join(vaultBasePath, file));
            buffer = test;
        }
        catch (e) { }
        if (!buffer) {
            new obsidian.Notice('Failed to load custom Pandoc CSS file: ' + settings.customCSSFile);
            return '';
        }
        else {
            return buffer.toString();
        }
    });
}
function getAppConfig(vaultBasePath) {
    return __awaiter(this, void 0, void 0, function* () {
        return JSON.parse((yield fs__namespace.promises.readFile(path__namespace.join(vaultBasePath, '.obsidian', 'config'))).toString());
    });
}
function currentThemeIsLight(vaultBasePath, config = null) {
    return __awaiter(this, void 0, void 0, function* () {
        try {
            if (!config)
                config = yield getAppConfig(vaultBasePath);
            return config.theme !== 'obsidian';
        }
        catch (e) {
            return true;
        }
    });
}
function mermaidCSS(settings, vaultBasePath) {
    return __awaiter(this, void 0, void 0, function* () {
        // We always inject CSS into Mermaid diagrams, using light theme if the user has requested no CSS
        //   otherwise the diagrams look terrible. The output is a PNG either way
        let light = true;
        if (settings.injectAppCSS === 'dark')
            light = false;
        if (settings.injectAppCSS === 'current') {
            light = yield currentThemeIsLight(vaultBasePath);
        }
        return variables(light);
    });
}
// Gets a small subset of app CSS and 3rd party theme CSS if desired
function getThemeCSS(settings, vaultBasePath) {
    return __awaiter(this, void 0, void 0, function* () {
        if (settings.injectAppCSS === 'none')
            return '';
        try {
            const config = yield getAppConfig(vaultBasePath);
            let light = yield currentThemeIsLight(vaultBasePath, config);
            if (settings.injectAppCSS === 'light')
                light = true;
            if (settings.injectAppCSS === 'dark')
                light = false;
            return appCSS(light);
        }
        catch (e) {
            return '';
        }
    });
}
function getDesiredCSS(settings, html, vaultBasePath) {
    return __awaiter(this, void 0, void 0, function* () {
        let css = yield getThemeCSS(settings, vaultBasePath);
        if (settings.injectAppCSS !== 'none') {
            css += ' ' + Array.from(document.querySelectorAll('style'))
                .map(s => s.innerHTML).join(' ');
        }
        // Inject MathJax font CSS if needed (at this stage embedded notes are
        //  already embedded so doesn't duplicate CSS)
        if (html.indexOf('jax="CHTML"') !== -1)
            css += ' ' + mathJaxFontCSS;
        // Inject custom local CSS file if it exists
        css += yield getCustomCSS(settings, vaultBasePath);
        return css;
    });
}
function standaloneHTML(settings, html, title, vaultBasePath) {
    return __awaiter(this, void 0, void 0, function* () {
        // Wraps an HTML fragment in a proper document structure
        //  and injects the page's CSS
        const css = yield getDesiredCSS(settings, html, vaultBasePath);
        return `<!doctype html>\n` +
            `<html>\n` +
            `    <head>\n` +
            `        <title>${title}</title>\n` +
            `        <meta charset='utf-8'/>\n` +
            `        <style>\n${css}\n</style>\n` +
            `    </head>\n` +
            `    <body>\n` +
            `${html}\n` +
            `    </body>\n` +
            `</html>`;
    });
}
function postProcessRenderedHTML(plugin, inputFile, wrapper, outputFormat, parentFiles = [], css = '') {
    return __awaiter(this, void 0, void 0, function* () {
        const dirname = path__namespace.dirname(inputFile);
        const adapter = plugin.app.vault.adapter;
        const settings = plugin.settings;
        // Fix <span src="image.png">
        for (let span of Array.from(wrapper.querySelectorAll('span[src$=".png"], span[src$=".jpg"], span[src$=".gif"], span[src$=".jpeg"]'))) {
            span.innerHTML = '';
            span.outerHTML = span.outerHTML.replace(/span/g, 'img');
        }
        // Fix <span class='internal-embed' src='another_note_without_extension'>
        for (let span of Array.from(wrapper.querySelectorAll('span.internal-embed'))) {
            let src = span.getAttribute('src');
            if (src) {
                const subfolder = inputFile.substring(adapter.getBasePath().length); // TODO: this is messy
                const file = plugin.app.metadataCache.getFirstLinkpathDest(src, subfolder);
                try {
                    if (parentFiles.indexOf(file.path) !== -1) {
                        // We've got an infinite recursion on our hands
                        // We should replace the embed with a wikilink
                        // Then our link processing happens afterwards
                        span.outerHTML = `<a href="${file}">${span.innerHTML}</a>`;
                    }
                    else {
                        const markdown = yield adapter.read(file.path);
                        const newParentFiles = [...parentFiles];
                        newParentFiles.push(inputFile);
                        // TODO: because of this cast, embedded notes won't be able to handle complex plugins (eg DataView)
                        const html = yield render(plugin, { data: markdown }, file.path, outputFormat, newParentFiles);
                        span.outerHTML = html.html;
                    }
                }
                catch (e) {
                    // Continue if it can't be loaded
                    console.error("Pandoc plugin encountered an error trying to load an embedded note: " + e.toString());
                }
            }
        }
        // Fix <a href="app://obsidian.md/markdown_file_without_extension">
        const prefix = 'app://obsidian.md/';
        for (let a of Array.from(wrapper.querySelectorAll('a'))) {
            if (!a.href.startsWith(prefix))
                continue;
            // This is now an internal link (wikilink)
            if (settings.linkStrippingBehaviour === 'link' || outputFormat === 'html') {
                let href = path__namespace.join(dirname, a.href.substring(prefix.length));
                if (settings.addExtensionsToInternalLinks.length && a.href.startsWith(prefix)) {
                    if (path__namespace.extname(href) === '') {
                        const dir = path__namespace.dirname(href);
                        const base = path__namespace.basename(href);
                        // Be careful to turn [[note#heading]] into note.extension#heading not note#heading.extension
                        const hashIndex = base.indexOf('#');
                        if (hashIndex !== -1) {
                            href = path__namespace.join(dir, base.substring(0, hashIndex) + '.' + settings.addExtensionsToInternalLinks + base.substring(hashIndex));
                        }
                        else {
                            href = path__namespace.join(dir, base + '.' + settings.addExtensionsToInternalLinks);
                        }
                    }
                }
                a.href = href;
            }
            else if (settings.linkStrippingBehaviour === 'strip') {
                a.outerHTML = '';
            }
            else if (settings.linkStrippingBehaviour === 'text') {
                a.outerHTML = a.innerText;
            }
            else if (settings.linkStrippingBehaviour === 'unchanged') {
                a.outerHTML = '[[' + a.outerHTML + ']]';
            }
        }
        // Fix <img src="app://obsidian.md/image.png">
        // Note: this will throw errors when Obsidian tries to load images with a (now invalid) src
        // These errors can be safely ignored
        if (outputFormat !== 'html') {
            for (let img of Array.from(wrapper.querySelectorAll('img'))) {
                if (img.src.startsWith(prefix) && img.getAttribute('data-touched') !== 'true') {
                    img.src = adapter.getFullPath(img.src.substring(prefix.length));
                    img.setAttribute('data-touched', 'true');
                }
            }
        }
        // Remove YAML frontmatter from the output if desired
        if (!settings.displayYAMLFrontmatter) {
            Array.from(wrapper.querySelectorAll('.frontmatter, .frontmatter-container'))
                .forEach(el => wrapper.removeChild(el));
        }
        // Fix Mermaid.js diagrams
        for (let svg of Array.from(wrapper.querySelectorAll('svg'))) {
            // Insert the CSS variables as a CSS string (even if the user doesn't want CSS injected; Mermaid diagrams look terrible otherwise)
            // TODO: it injects light theme CSS, do we want this?
            let style = svg.querySelector('style') || svg.appendChild(document.createElement('style'));
            style.innerHTML += css;
            // Inject a marker (arrowhead) for Mermaid.js diagrams and use it at the end of paths
            svg.innerHTML += `"<marker id="mermaid_arrowhead" viewBox="0 0 10 10" refX="9" refY="5" markerUnits="strokeWidth" markerWidth="8" markerHeight="6" orient="auto"><path d="M 0 0 L 10 5 L 0 10 z" class="arrowheadPath" style="stroke-width: 1; stroke-dasharray: 1, 0;"></path></marker>"`;
            svg.innerHTML = svg.innerHTML.replace(/app:\/\/obsidian\.md\/index\.html#arrowhead\d*/g, "#mermaid_arrowhead");
            // If the output isn't HTML, replace the SVG with a PNG for compatibility
            if (outputFormat !== 'html') {
                const scale = settings.highDPIDiagrams ? 2 : 1;
                const png = yield convertSVGToPNG(svg, scale);
                svg.parentNode.replaceChild(png, svg);
            }
        }
    });
}
// This creates an unmounted <img> element with a transparent background PNG data URL as the src
// The scale parameter is used for high DPI renders (the <img> element size is the same,
//  but the underlying PNG is higher resolution)
function convertSVGToPNG(svg, scale = 1) {
    const canvas = document.createElement('canvas');
    canvas.width = Math.ceil(svg.width.baseVal.value * scale);
    canvas.height = Math.ceil(svg.height.baseVal.value * scale);
    const ctx = canvas.getContext('2d');
    var svgImg = new Image;
    svgImg.src = "data:image/svg+xml;base64," + btoa(svg.outerHTML);
    return new Promise((resolve, reject) => {
        svgImg.onload = () => {
            ctx.drawImage(svgImg, 0, 0, canvas.width, canvas.height);
            const pngData = canvas.toDataURL('png');
            const img = document.createElement('img');
            img.src = pngData;
            img.width = Math.ceil(svg.width.baseVal.value);
            img.height = Math.ceil(svg.height.baseVal.value);
            resolve(img);
        };
    });
}

/*
 * settings.ts
 *
 * Creates the settings UI
 *
 */
class PandocPluginSettingTab extends obsidian.PluginSettingTab {
    constructor(app, plugin) {
        super(app, plugin);
        this.errorMessages = {
            pandoc: "Pandoc is not installed or accessible on your PATH. This plugin's functionality will be limited.",
            latex: "LaTeX is not installed or accessible on your PATH. Please install it if you want PDF exports via LaTeX.",
        };
        this.plugin = plugin;
    }
    display() {
        let { containerEl } = this;
        containerEl.empty();
        containerEl.createEl('h3', { text: 'Pandoc Plugin' });
        const createError = (text) => containerEl.createEl('p', { cls: 'pandoc-plugin-error', text });
        for (const binary in this.plugin.features) {
            const path = this.plugin.features[binary];
            if (path === undefined) {
                createError(this.errorMessages[binary]);
            }
        }
        new obsidian.Setting(containerEl)
            .setName("Custom CSS file for HTML output")
            .setDesc("This local CSS file will be read and injected into HTML exports. Use an absolute path or a path relative to the vault.")
            .addText(text => text
            .setPlaceholder('File name')
            .setValue(this.plugin.settings.customCSSFile)
            .onChange((value) => __awaiter(this, void 0, void 0, function* () {
            if (!value.length)
                this.plugin.settings.customCSSFile = null;
            else
                this.plugin.settings.customCSSFile = value;
            yield this.plugin.saveSettings();
        })));
        new obsidian.Setting(containerEl)
            .setName("Inject app CSS (HTML output only)")
            .setDesc("This applies app & plugin CSS to HTML exports, but the files become a little bigger.")
            .addDropdown(dropdown => dropdown
            .addOptions({
            "current": "Current theme",
            "none": "Neither theme",
            "light": "Light theme",
            "dark": "Dark theme",
        })
            .setValue(this.plugin.settings.injectAppCSS)
            .onChange((value) => __awaiter(this, void 0, void 0, function* () {
            this.plugin.settings.injectAppCSS = value;
            yield this.plugin.saveSettings();
        })));
        new obsidian.Setting(containerEl)
            .setName("Internal link processing")
            .setDesc("This controls how [[wiki-links]] are formatted. Doesn't affect HTML output.")
            .addDropdown(dropdown => dropdown
            .addOptions({
            "text": "Turn into text",
            "link": "Leave as links",
            "strip": "Remove links",
            "unchanged": "Leave unchanged",
        })
            .setValue(this.plugin.settings.linkStrippingBehaviour)
            .onChange((value) => __awaiter(this, void 0, void 0, function* () {
            this.plugin.settings.linkStrippingBehaviour = value;
            yield this.plugin.saveSettings();
        })));
        new obsidian.Setting(containerEl)
            .setName("Export files from HTML or markdown?")
            .setDesc("Export from markdown, or from the HTML visible in Obsidian? HTML supports fancy plugin features, markdown supports Pandoc features like citations.")
            .addDropdown(dropdown => dropdown
            .addOptions({
            "html": "HTML",
            "md": "Markdown",
        })
            .setValue(this.plugin.settings.exportFrom)
            .onChange((value) => __awaiter(this, void 0, void 0, function* () {
            this.plugin.settings.exportFrom = value;
            yield this.plugin.saveSettings();
        })));
        new obsidian.Setting(containerEl)
            .setName("Export folder")
            .setDesc("Absolute path to an export folder, like 'C:\Users\Example\Documents' or '/home/user/zettelkasten'. If left blank, files are saved next to where they were exported from.")
            .addText(text => text
            .setPlaceholder('same as target')
            .setValue(this.plugin.settings.outputFolder)
            .onChange((value) => __awaiter(this, void 0, void 0, function* () {
            this.plugin.settings.outputFolder = value;
            yield this.plugin.saveSettings();
        })));
        new obsidian.Setting(containerEl)
            .setName("Show Pandoc command line interface commands")
            .setDesc("Doesn't apply to HTML exports. Using the CLI will have slightly different results due to how this plugin works.")
            .addToggle(toggle => toggle
            .setValue(this.plugin.settings.showCLICommands)
            .onChange((value) => __awaiter(this, void 0, void 0, function* () {
            this.plugin.settings.showCLICommands = value;
            yield this.plugin.saveSettings();
        })));
        new obsidian.Setting(containerEl)
            .setName("Pandoc path")
            .setDesc("Optional override for Pandoc's path if you have command not found issues. On Mac/Linux use the output of 'which pandoc' in a terminal; on Windows use the output of 'Get-Command pandoc' in powershell.")
            .addText(text => text
            .setPlaceholder('pandoc')
            .setValue(this.plugin.settings.pandoc)
            .onChange((value) => __awaiter(this, void 0, void 0, function* () {
            this.plugin.settings.pandoc = value;
            yield this.plugin.saveSettings();
        })));
        new obsidian.Setting(containerEl)
            .setName("PDFLaTeX path")
            .setDesc("Optional override for pdflatex's path. Same as above but with 'which pdflatex'")
            .addText(text => text
            .setPlaceholder('pdflatex')
            .setValue(this.plugin.settings.pdflatex)
            .onChange((value) => __awaiter(this, void 0, void 0, function* () {
            this.plugin.settings.pdflatex = value;
            yield this.plugin.saveSettings();
        })));
        new obsidian.Setting(containerEl)
            .setName("Extra Pandoc arguments")
            .setDesc("Add extra command line arguments so you can use templates or bibliographies. Newlines are turned into spaces")
            .addTextArea(text => text
            .setPlaceholder('Example: --bibliography "Zotero Exports\My Library.json" or --template letter')
            .setValue(this.plugin.settings.extraArguments)
            .onChange((value) => __awaiter(this, void 0, void 0, function* () {
            this.plugin.settings.extraArguments = value;
            yield this.plugin.saveSettings();
        }))
            .inputEl.style.minHeight = '150px');
    }
}

const DEFAULT_SETTINGS = {
    showCLICommands: false,
    addExtensionsToInternalLinks: 'html',
    injectAppCSS: 'light',
    injectThemeCSS: false,
    customCSSFile: null,
    displayYAMLFrontmatter: false,
    linkStrippingBehaviour: 'text',
    highDPIDiagrams: true,
    pandoc: null,
    pdflatex: null,
    outputFolder: null,
    extraArguments: '',
    exportFrom: 'html',
};
function replaceFileExtension(file, ext) {
    // Source: https://stackoverflow.com/a/5953384/4642943
    let pos = file.lastIndexOf('.');
    return file.substr(0, pos < 0 ? file.length : pos) + '.' + ext;
}

/*
 * main.ts
 *
 * Initialises the plugin, adds command palette options, adds the settings UI
 * Markdown processing is done in renderer.ts and Pandoc invocation in pandoc.ts
 *
 */
class PandocPlugin extends obsidian.Plugin {
    constructor() {
        super(...arguments);
        this.features = {};
    }
    onload() {
        return __awaiter(this, void 0, void 0, function* () {
            console.log('Loading Pandoc plugin');
            yield this.loadSettings();
            // Check if Pandoc, LaTeX, etc. are installed and in the PATH
            this.createBinaryMap();
            // Register all of the command palette entries
            this.registerCommands();
            this.addSettingTab(new PandocPluginSettingTab(this.app, this));
        });
    }
    registerCommands() {
        for (let [prettyName, pandocFormat, extension, shortName] of outputFormats) {
            const name = 'Export as ' + prettyName;
            this.addCommand({
                id: 'pandoc-export-' + pandocFormat, name,
                checkCallback: (checking) => {
                    if (!this.app.workspace.activeLeaf)
                        return false;
                    if (!this.currentFileCanBeExported(pandocFormat))
                        return false;
                    if (!checking) {
                        this.startPandocExport(this.getCurrentFile(), pandocFormat, extension, shortName);
                    }
                    return true;
                }
            });
        }
    }
    vaultBasePath() {
        return this.app.vault.adapter.getBasePath();
    }
    getCurrentFile() {
        const fileData = this.app.workspace.getActiveFile();
        if (!fileData)
            return null;
        const adapter = this.app.vault.adapter;
        if (adapter instanceof obsidian.FileSystemAdapter)
            return adapter.getFullPath(fileData.path);
        return null;
    }
    currentFileCanBeExported(format) {
        // Is it an available output type?
        if (needsPandoc(format) && !this.features['pandoc'])
            return false;
        if (needsLaTeX(format) && !this.features['pdflatex'])
            return false;
        // Is it a supported input type?
        const file = this.getCurrentFile();
        if (!file)
            return false;
        for (const ext of inputExtensions) {
            if (file.endsWith(ext))
                return true;
        }
        return false;
    }
    createBinaryMap() {
        return __awaiter(this, void 0, void 0, function* () {
            this.features['pandoc'] = this.settings.pandoc || (yield lib.lookpath('pandoc'));
            this.features['pdflatex'] = this.settings.pdflatex || (yield lib.lookpath('pdflatex'));
        });
    }
    startPandocExport(inputFile, format, extension, shortName) {
        return __awaiter(this, void 0, void 0, function* () {
            new obsidian.Notice(`Exporting ${inputFile} to ${shortName}`);
            // Instead of using Pandoc to process the raw Markdown, we use Obsidian's
            // internal markdown renderer, and process the HTML it generates instead.
            // This allows us to more easily deal with Obsidian specific Markdown syntax.
            // However, we provide an option to use MD instead to use citations
            let outputFile = replaceFileExtension(inputFile, extension);
            if (this.settings.outputFolder) {
                outputFile = path__namespace.join(this.settings.outputFolder, path__namespace.basename(outputFile));
            }
            const view = this.app.workspace.getActiveViewOfType(obsidian.MarkdownView);
            try {
                let error, command;
                switch (this.settings.exportFrom) {
                    case 'html': {
                        const { html, metadata } = yield render(this, view, inputFile, format);
                        if (format === 'html') {
                            // Write to HTML file
                            yield fs__namespace.promises.writeFile(outputFile, html);
                            new obsidian.Notice('Successfully exported via Pandoc to ' + outputFile);
                            return;
                        }
                        else {
                            // Spawn Pandoc
                            const metadataFile = temp.path();
                            const metadataString = stringify(metadata);
                            yield fs__namespace.promises.writeFile(metadataFile, metadataString);
                            const result = yield pandoc({
                                file: 'STDIN', contents: html, format: 'html', metadataFile,
                                pandoc: this.settings.pandoc, pdflatex: this.settings.pdflatex
                            }, { file: outputFile, format }, this.settings.extraArguments.split('\n'));
                            error = result.error;
                            command = result.command;
                        }
                        break;
                    }
                    case 'md': {
                        const result = yield pandoc({
                            file: inputFile, format: 'markdown',
                            pandoc: this.settings.pandoc, pdflatex: this.settings.pdflatex
                        }, { file: outputFile, format }, this.settings.extraArguments.split('\n'));
                        error = result.error;
                        command = result.command;
                        break;
                    }
                }
                if (error.length) {
                    new obsidian.Notice('Exported via Pandoc to ' + outputFile + ' with warnings');
                    new obsidian.Notice('Pandoc warnings:' + error, 10000);
                }
                else {
                    new obsidian.Notice('Successfully exported via Pandoc to ' + outputFile);
                }
                if (this.settings.showCLICommands) {
                    new obsidian.Notice('Pandoc command: ' + command, 10000);
                    console.log(command);
                }
            }
            catch (e) {
                new obsidian.Notice('Pandoc export failed: ' + e.toString(), 15000);
                console.error(e);
            }
        });
    }
    onunload() {
        console.log('Unloading Pandoc plugin');
    }
    loadSettings() {
        return __awaiter(this, void 0, void 0, function* () {
            this.settings = Object.assign({}, DEFAULT_SETTINGS, yield this.loadData());
        });
    }
    saveSettings() {
        return __awaiter(this, void 0, void 0, function* () {
            yield this.saveData(this.settings);
        });
    }
}

module.exports = PandocPlugin;
//# sourceMappingURL=data:application/json;charset=utf-8;base64,[encoded data, 1029912 characters]
