shuiwu/node_modules/rollup/dist/shared/index.js

/*
  @license
	Rollup.js v3.18.0
	Wed, 01 Mar 2023 18:45:12 GMT - commit 25bdc129d21685b69a00ee55397d42ac6eff6449

	https://github.com/rollup/rollup

	Released under the MIT License.
*/
'use strict';

const rollup = require('./rollup.js');
const require$$0$1 = require('fs');
const require$$2 = require('util');
const require$$1 = require('stream');
const require$$0$2 = require('path');
const require$$2$1 = require('os');
const fseventsImporter = require('./fsevents-importer.js');
const require$$0$3 = require('events');

var chokidar = {};

const fs$3 = require$$0$1;
const { Readable } = require$$1;
const sysPath$3 = require$$0$2;
const { promisify: promisify$3 } = require$$2;
const picomatch$1 = rollup.picomatchExports;

const readdir$1 = promisify$3(fs$3.readdir);
const stat$3 = promisify$3(fs$3.stat);
const lstat$2 = promisify$3(fs$3.lstat);
const realpath$1 = promisify$3(fs$3.realpath);

/**
 * @typedef {Object} EntryInfo
 * @property {String} path
 * @property {String} fullPath
 * @property {fs.Stats=} stats
 * @property {fs.Dirent=} dirent
 * @property {String} basename
 */

const BANG$2 = '!';
const RECURSIVE_ERROR_CODE = 'READDIRP_RECURSIVE_ERROR';
const NORMAL_FLOW_ERRORS = new Set(['ENOENT', 'EPERM', 'EACCES', 'ELOOP', RECURSIVE_ERROR_CODE]);
const FILE_TYPE = 'files';
const DIR_TYPE = 'directories';
const FILE_DIR_TYPE = 'files_directories';
const EVERYTHING_TYPE = 'all';
const ALL_TYPES = [FILE_TYPE, DIR_TYPE, FILE_DIR_TYPE, EVERYTHING_TYPE];

const isNormalFlowError = error => NORMAL_FLOW_ERRORS.has(error.code);
const [maj, min] = process.versions.node.split('.').slice(0, 2).map(n => Number.parseInt(n, 10));
const wantBigintFsStats = process.platform === 'win32' && (maj > 10 || (maj === 10 && min >= 5));

const normalizeFilter = filter => {
  if (filter === undefined) return;
  if (typeof filter === 'function') return filter;

  if (typeof filter === 'string') {
    const glob = picomatch$1(filter.trim());
    return entry => glob(entry.basename);
  }

  if (Array.isArray(filter)) {
    const positive = [];
    const negative = [];
    for (const item of filter) {
      const trimmed = item.trim();
      if (trimmed.charAt(0) === BANG$2) {
        negative.push(picomatch$1(trimmed.slice(1)));
      } else {
        positive.push(picomatch$1(trimmed));
      }
    }

    if (negative.length > 0) {
      if (positive.length > 0) {
        return entry =>
          positive.some(f => f(entry.basename)) && !negative.some(f => f(entry.basename));
      }
      return entry => !negative.some(f => f(entry.basename));
    }
    return entry => positive.some(f => f(entry.basename));
  }
};

class ReaddirpStream extends Readable {
  static get defaultOptions() {
    return {
      root: '.',
      /* eslint-disable no-unused-vars */
      fileFilter: (path) => true,
      directoryFilter: (path) => true,
      /* eslint-enable no-unused-vars */
      type: FILE_TYPE,
      lstat: false,
      depth: 2147483648,
      alwaysStat: false
    };
  }

  constructor(options = {}) {
    super({
      objectMode: true,
      autoDestroy: true,
      highWaterMark: options.highWaterMark || 4096
    });
    const opts = { ...ReaddirpStream.defaultOptions, ...options };
    const { root, type } = opts;

    this._fileFilter = normalizeFilter(opts.fileFilter);
    this._directoryFilter = normalizeFilter(opts.directoryFilter);

    const statMethod = opts.lstat ? lstat$2 : stat$3;
    // Use bigint stats if it's windows and stat() supports options (node 10+).
    if (wantBigintFsStats) {
      this._stat = path => statMethod(path, { bigint: true });
    } else {
      this._stat = statMethod;
    }

    this._maxDepth = opts.depth;
    this._wantsDir = [DIR_TYPE, FILE_DIR_TYPE, EVERYTHING_TYPE].includes(type);
    this._wantsFile = [FILE_TYPE, FILE_DIR_TYPE, EVERYTHING_TYPE].includes(type);
    this._wantsEverything = type === EVERYTHING_TYPE;
    this._root = sysPath$3.resolve(root);
    this._isDirent = ('Dirent' in fs$3) && !opts.alwaysStat;
    this._statsProp = this._isDirent ? 'dirent' : 'stats';
    this._rdOptions = { encoding: 'utf8', withFileTypes: this._isDirent };

    // Launch stream with one parent, the root dir.
    this.parents = [this._exploreDir(root, 1)];
    this.reading = false;
    this.parent = undefined;
  }

  async _read(batch) {
    if (this.reading) return;
    this.reading = true;

    try {
      while (!this.destroyed && batch > 0) {
        const { path, depth, files = [] } = this.parent || {};

        if (files.length > 0) {
          const slice = files.splice(0, batch).map(dirent => this._formatEntry(dirent, path));
          for (const entry of await Promise.all(slice)) {
            if (this.destroyed) return;

            const entryType = await this._getEntryType(entry);
            if (entryType === 'directory' && this._directoryFilter(entry)) {
              if (depth <= this._maxDepth) {
                this.parents.push(this._exploreDir(entry.fullPath, depth + 1));
              }

              if (this._wantsDir) {
                this.push(entry);
                batch--;
              }
            } else if ((entryType === 'file' || this._includeAsFile(entry)) && this._fileFilter(entry)) {
              if (this._wantsFile) {
                this.push(entry);
                batch--;
              }
            }
          }
        } else {
          const parent = this.parents.pop();
          if (!parent) {
            this.push(null);
            break;
          }
          this.parent = await parent;
          if (this.destroyed) return;
        }
      }
    } catch (error) {
      this.destroy(error);
    } finally {
      this.reading = false;
    }
  }

  async _exploreDir(path, depth) {
    let files;
    try {
      files = await readdir$1(path, this._rdOptions);
    } catch (error) {
      this._onError(error);
    }
    return { files, depth, path };
  }

  async _formatEntry(dirent, path) {
    let entry;
    try {
      const basename = this._isDirent ? dirent.name : dirent;
      const fullPath = sysPath$3.resolve(sysPath$3.join(path, basename));
      entry = { path: sysPath$3.relative(this._root, fullPath), fullPath, basename };
      entry[this._statsProp] = this._isDirent ? dirent : await this._stat(fullPath);
    } catch (err) {
      this._onError(err);
    }
    return entry;
  }

  _onError(err) {
    if (isNormalFlowError(err) && !this.destroyed) {
      this.emit('warn', err);
    } else {
      this.destroy(err);
    }
  }

  async _getEntryType(entry) {
    // entry may be undefined, because a warning or an error were emitted
    // and the statsProp is undefined
    const stats = entry && entry[this._statsProp];
    if (!stats) {
      return;
    }
    if (stats.isFile()) {
      return 'file';
    }
    if (stats.isDirectory()) {
      return 'directory';
    }
    if (stats && stats.isSymbolicLink()) {
      const full = entry.fullPath;
      try {
        const entryRealPath = await realpath$1(full);
        const entryRealPathStats = await lstat$2(entryRealPath);
        if (entryRealPathStats.isFile()) {
          return 'file';
        }
        if (entryRealPathStats.isDirectory()) {
          const len = entryRealPath.length;
          if (full.startsWith(entryRealPath) && full.substr(len, 1) === sysPath$3.sep) {
            const recursiveError = new Error(
              `Circular symlink detected: "${full}" points to "${entryRealPath}"`
            );
            recursiveError.code = RECURSIVE_ERROR_CODE;
            return this._onError(recursiveError);
          }
          return 'directory';
        }
      } catch (error) {
        this._onError(error);
      }
    }
  }

  _includeAsFile(entry) {
    const stats = entry && entry[this._statsProp];

    return stats && this._wantsEverything && !stats.isDirectory();
  }
}

/**
 * @typedef {Object} ReaddirpArguments
 * @property {Function=} fileFilter
 * @property {Function=} directoryFilter
 * @property {String=} type
 * @property {Number=} depth
 * @property {String=} root
 * @property {Boolean=} lstat
 * @property {Boolean=} bigint
 */

/**
 * Main function which ends up calling readdirRec and reads all files and directories in given root recursively.
 * @param {String} root Root directory
 * @param {ReaddirpArguments=} options Options to specify root (start directory), filters and recursion depth
 */
const readdirp$1 = (root, options = {}) => {
  let type = options.entryType || options.type;
  if (type === 'both') type = FILE_DIR_TYPE; // backwards-compatibility
  if (type) options.type = type;
  if (!root) {
    throw new Error('readdirp: root argument is required. Usage: readdirp(root, options)');
  } else if (typeof root !== 'string') {
    throw new TypeError('readdirp: root argument must be a string. Usage: readdirp(root, options)');
  } else if (type && !ALL_TYPES.includes(type)) {
    throw new Error(`readdirp: Invalid type passed. Use one of ${ALL_TYPES.join(', ')}`);
  }

  options.root = root;
  return new ReaddirpStream(options);
};

const readdirpPromise = (root, options = {}) => {
  return new Promise((resolve, reject) => {
    const files = [];
    readdirp$1(root, options)
      .on('data', entry => files.push(entry))
      .on('end', () => resolve(files))
      .on('error', error => reject(error));
  });
};

readdirp$1.promise = readdirpPromise;
readdirp$1.ReaddirpStream = ReaddirpStream;
readdirp$1.default = readdirp$1;

var readdirp_1 = readdirp$1;

var anymatchExports = {};
var anymatch$2 = {
  get exports(){ return anymatchExports; },
  set exports(v){ anymatchExports = v; },
};

/*!
 * normalize-path <https://github.com/jonschlinkert/normalize-path>
 *
 * Copyright (c) 2014-2018, Jon Schlinkert.
 * Released under the MIT License.
 */

var normalizePath$2 = function(path, stripTrailing) {
  if (typeof path !== 'string') {
    throw new TypeError('expected path to be a string');
  }

  if (path === '\\' || path === '/') return '/';

  var len = path.length;
  if (len <= 1) return path;

  // ensure that win32 namespaces has two leading slashes, so that the path is
  // handled properly by the win32 version of path.parse() after being normalized
  // https://msdn.microsoft.com/library/windows/desktop/aa365247(v=vs.85).aspx#namespaces
  var prefix = '';
  if (len > 4 && path[3] === '\\') {
    var ch = path[2];
    if ((ch === '?' || ch === '.') && path.slice(0, 2) === '\\\\') {
      path = path.slice(2);
      prefix = '//';
    }
  }

  var segs = path.split(/[/\\]+/);
  if (stripTrailing !== false && segs[segs.length - 1] === '') {
    segs.pop();
  }
  return prefix + segs.join('/');
};

Object.defineProperty(anymatchExports, "__esModule", { value: true });

const picomatch = rollup.picomatchExports;
const normalizePath$1 = normalizePath$2;

/**
 * @typedef {(testString: string) => boolean} AnymatchFn
 * @typedef {string|RegExp|AnymatchFn} AnymatchPattern
 * @typedef {AnymatchPattern|AnymatchPattern[]} AnymatchMatcher
 */
const BANG$1 = '!';
const DEFAULT_OPTIONS = {returnIndex: false};
const arrify$1 = (item) => Array.isArray(item) ? item : [item];

/**
 * @param {AnymatchPattern} matcher
 * @param {object} options
 * @returns {AnymatchFn}
 */
const createPattern = (matcher, options) => {
  if (typeof matcher === 'function') {
    return matcher;
  }
  if (typeof matcher === 'string') {
    const glob = picomatch(matcher, options);
    return (string) => matcher === string || glob(string);
  }
  if (matcher instanceof RegExp) {
    return (string) => matcher.test(string);
  }
  return (string) => false;
};

/**
 * @param {Array<Function>} patterns
 * @param {Array<Function>} negPatterns
 * @param {String|Array} args
 * @param {Boolean} returnIndex
 * @returns {boolean|number}
 */
const matchPatterns = (patterns, negPatterns, args, returnIndex) => {
  const isList = Array.isArray(args);
  const _path = isList ? args[0] : args;
  if (!isList && typeof _path !== 'string') {
    throw new TypeError('anymatch: second argument must be a string: got ' +
      Object.prototype.toString.call(_path))
  }
  const path = normalizePath$1(_path, false);

  for (let index = 0; index < negPatterns.length; index++) {
    const nglob = negPatterns[index];
    if (nglob(path)) {
      return returnIndex ? -1 : false;
    }
  }

  const applied = isList && [path].concat(args.slice(1));
  for (let index = 0; index < patterns.length; index++) {
    const pattern = patterns[index];
    if (isList ? pattern(...applied) : pattern(path)) {
      return returnIndex ? index : true;
    }
  }

  return returnIndex ? -1 : false;
};

/**
 * @param {AnymatchMatcher} matchers
 * @param {Array|string} testString
 * @param {object} options
 * @returns {boolean|number|Function}
 */
const anymatch$1 = (matchers, testString, options = DEFAULT_OPTIONS) => {
  if (matchers == null) {
    throw new TypeError('anymatch: specify first argument');
  }
  const opts = typeof options === 'boolean' ? {returnIndex: options} : options;
  const returnIndex = opts.returnIndex || false;

  // Early cache for matchers.
  const mtchers = arrify$1(matchers);
  const negatedGlobs = mtchers
    .filter(item => typeof item === 'string' && item.charAt(0) === BANG$1)
    .map(item => item.slice(1))
    .map(item => picomatch(item, opts));
  const patterns = mtchers
    .filter(item => typeof item !== 'string' || (typeof item === 'string' && item.charAt(0) !== BANG$1))
    .map(matcher => createPattern(matcher, opts));

  if (testString == null) {
    return (testString, ri = false) => {
      const returnIndex = typeof ri === 'boolean' ? ri : false;
      return matchPatterns(patterns, negatedGlobs, testString, returnIndex);
    }
  }

  return matchPatterns(patterns, negatedGlobs, testString, returnIndex);
};

anymatch$1.default = anymatch$1;
anymatch$2.exports = anymatch$1;

/*!
 * is-extglob <https://github.com/jonschlinkert/is-extglob>
 *
 * Copyright (c) 2014-2016, Jon Schlinkert.
 * Licensed under the MIT License.
 */

var isExtglob$1 = function isExtglob(str) {
  if (typeof str !== 'string' || str === '') {
    return false;
  }

  var match;
  while ((match = /(\\).|([@?!+*]\(.*\))/g.exec(str))) {
    if (match[2]) return true;
    str = str.slice(match.index + match[0].length);
  }

  return false;
};

/*!
 * is-glob <https://github.com/jonschlinkert/is-glob>
 *
 * Copyright (c) 2014-2017, Jon Schlinkert.
 * Released under the MIT License.
 */

var isExtglob = isExtglob$1;
var chars = { '{': '}', '(': ')', '[': ']'};
var strictCheck = function(str) {
  if (str[0] === '!') {
    return true;
  }
  var index = 0;
  var pipeIndex = -2;
  var closeSquareIndex = -2;
  var closeCurlyIndex = -2;
  var closeParenIndex = -2;
  var backSlashIndex = -2;
  while (index < str.length) {
    if (str[index] === '*') {
      return true;
    }

    if (str[index + 1] === '?' && /[\].+)]/.test(str[index])) {
      return true;
    }

    if (closeSquareIndex !== -1 && str[index] === '[' && str[index + 1] !== ']') {
      if (closeSquareIndex < index) {
        closeSquareIndex = str.indexOf(']', index);
      }
      if (closeSquareIndex > index) {
        if (backSlashIndex === -1 || backSlashIndex > closeSquareIndex) {
          return true;
        }
        backSlashIndex = str.indexOf('\\', index);
        if (backSlashIndex === -1 || backSlashIndex > closeSquareIndex) {
          return true;
        }
      }
    }

    if (closeCurlyIndex !== -1 && str[index] === '{' && str[index + 1] !== '}') {
      closeCurlyIndex = str.indexOf('}', index);
      if (closeCurlyIndex > index) {
        backSlashIndex = str.indexOf('\\', index);
        if (backSlashIndex === -1 || backSlashIndex > closeCurlyIndex) {
          return true;
        }
      }
    }

    if (closeParenIndex !== -1 && str[index] === '(' && str[index + 1] === '?' && /[:!=]/.test(str[index + 2]) && str[index + 3] !== ')') {
      closeParenIndex = str.indexOf(')', index);
      if (closeParenIndex > index) {
        backSlashIndex = str.indexOf('\\', index);
        if (backSlashIndex === -1 || backSlashIndex > closeParenIndex) {
          return true;
        }
      }
    }

    if (pipeIndex !== -1 && str[index] === '(' && str[index + 1] !== '|') {
      if (pipeIndex < index) {
        pipeIndex = str.indexOf('|', index);
      }
      if (pipeIndex !== -1 && str[pipeIndex + 1] !== ')') {
        closeParenIndex = str.indexOf(')', pipeIndex);
        if (closeParenIndex > pipeIndex) {
          backSlashIndex = str.indexOf('\\', pipeIndex);
          if (backSlashIndex === -1 || backSlashIndex > closeParenIndex) {
            return true;
          }
        }
      }
    }

    if (str[index] === '\\') {
      var open = str[index + 1];
      index += 2;
      var close = chars[open];

      if (close) {
        var n = str.indexOf(close, index);
        if (n !== -1) {
          index = n + 1;
        }
      }

      if (str[index] === '!') {
        return true;
      }
    } else {
      index++;
    }
  }
  return false;
};

var relaxedCheck = function(str) {
  if (str[0] === '!') {
    return true;
  }
  var index = 0;
  while (index < str.length) {
    if (/[*?{}()[\]]/.test(str[index])) {
      return true;
    }

    if (str[index] === '\\') {
      var open = str[index + 1];
      index += 2;
      var close = chars[open];

      if (close) {
        var n = str.indexOf(close, index);
        if (n !== -1) {
          index = n + 1;
        }
      }

      if (str[index] === '!') {
        return true;
      }
    } else {
      index++;
    }
  }
  return false;
};

var isGlob$2 = function isGlob(str, options) {
  if (typeof str !== 'string' || str === '') {
    return false;
  }

  if (isExtglob(str)) {
    return true;
  }

  var check = strictCheck;

  // optionally relax check
  if (options && options.strict === false) {
    check = relaxedCheck;
  }

  return check(str);
};

var isGlob$1 = isGlob$2;
var pathPosixDirname = require$$0$2.posix.dirname;
var isWin32 = require$$2$1.platform() === 'win32';

var slash = '/';
var backslash = /\\/g;
var enclosure = /[\{\[].*[\}\]]$/;
var globby = /(^|[^\\])([\{\[]|\([^\)]+$)/;
var escaped = /\\([\!\*\?\|\[\]\(\)\{\}])/g;

/**
 * @param {string} str
 * @param {Object} opts
 * @param {boolean} [opts.flipBackslashes=true]
 * @returns {string}
 */
var globParent$1 = function globParent(str, opts) {
  var options = Object.assign({ flipBackslashes: true }, opts);

  // flip windows path separators
  if (options.flipBackslashes && isWin32 && str.indexOf(slash) < 0) {
    str = str.replace(backslash, slash);
  }

  // special case for strings ending in enclosure containing path separator
  if (enclosure.test(str)) {
    str += slash;
  }

  // preserves full path in case of trailing path separator
  str += 'a';

  // remove path parts that are globby
  do {
    str = pathPosixDirname(str);
  } while (isGlob$1(str) || globby.test(str));

  // remove escape chars and return result
  return str.replace(escaped, '$1');
};

var utils$3 = {};

(function (exports) {

	exports.isInteger = num => {
	  if (typeof num === 'number') {
	    return Number.isInteger(num);
	  }
	  if (typeof num === 'string' && num.trim() !== '') {
	    return Number.isInteger(Number(num));
	  }
	  return false;
	};

	/**
	 * Find a node of the given type
	 */

	exports.find = (node, type) => node.nodes.find(node => node.type === type);

	/**
	 * Find a node of the given type
	 */

	exports.exceedsLimit = (min, max, step = 1, limit) => {
	  if (limit === false) return false;
	  if (!exports.isInteger(min) || !exports.isInteger(max)) return false;
	  return ((Number(max) - Number(min)) / Number(step)) >= limit;
	};

	/**
	 * Escape the given node with '\\' before node.value
	 */

	exports.escapeNode = (block, n = 0, type) => {
	  let node = block.nodes[n];
	  if (!node) return;

	  if ((type && node.type === type) || node.type === 'open' || node.type === 'close') {
	    if (node.escaped !== true) {
	      node.value = '\\' + node.value;
	      node.escaped = true;
	    }
	  }
	};

	/**
	 * Returns true if the given brace node should be enclosed in literal braces
	 */

	exports.encloseBrace = node => {
	  if (node.type !== 'brace') return false;
	  if ((node.commas >> 0 + node.ranges >> 0) === 0) {
	    node.invalid = true;
	    return true;
	  }
	  return false;
	};

	/**
	 * Returns true if a brace node is invalid.
	 */

	exports.isInvalidBrace = block => {
	  if (block.type !== 'brace') return false;
	  if (block.invalid === true || block.dollar) return true;
	  if ((block.commas >> 0 + block.ranges >> 0) === 0) {
	    block.invalid = true;
	    return true;
	  }
	  if (block.open !== true || block.close !== true) {
	    block.invalid = true;
	    return true;
	  }
	  return false;
	};

	/**
	 * Returns true if a node is an open or close node
	 */

	exports.isOpenOrClose = node => {
	  if (node.type === 'open' || node.type === 'close') {
	    return true;
	  }
	  return node.open === true || node.close === true;
	};

	/**
	 * Reduce an array of text nodes.
	 */

	exports.reduce = nodes => nodes.reduce((acc, node) => {
	  if (node.type === 'text') acc.push(node.value);
	  if (node.type === 'range') node.type = 'text';
	  return acc;
	}, []);

	/**
	 * Flatten an array
	 */

	exports.flatten = (...args) => {
	  const result = [];
	  const flat = arr => {
	    for (let i = 0; i < arr.length; i++) {
	      let ele = arr[i];
	      Array.isArray(ele) ? flat(ele) : ele !== void 0 && result.push(ele);
	    }
	    return result;
	  };
	  flat(args);
	  return result;
	};
} (utils$3));

const utils$2 = utils$3;

var stringify$4 = (ast, options = {}) => {
  let stringify = (node, parent = {}) => {
    let invalidBlock = options.escapeInvalid && utils$2.isInvalidBrace(parent);
    let invalidNode = node.invalid === true && options.escapeInvalid === true;
    let output = '';

    if (node.value) {
      if ((invalidBlock || invalidNode) && utils$2.isOpenOrClose(node)) {
        return '\\' + node.value;
      }
      return node.value;
    }

    if (node.value) {
      return node.value;
    }

    if (node.nodes) {
      for (let child of node.nodes) {
        output += stringify(child);
      }
    }
    return output;
  };

  return stringify(ast);
};

/*!
 * is-number <https://github.com/jonschlinkert/is-number>
 *
 * Copyright (c) 2014-present, Jon Schlinkert.
 * Released under the MIT License.
 */

var isNumber$2 = function(num) {
  if (typeof num === 'number') {
    return num - num === 0;
  }
  if (typeof num === 'string' && num.trim() !== '') {
    return Number.isFinite ? Number.isFinite(+num) : isFinite(+num);
  }
  return false;
};

/*!
 * to-regex-range <https://github.com/micromatch/to-regex-range>
 *
 * Copyright (c) 2015-present, Jon Schlinkert.
 * Released under the MIT License.
 */

const isNumber$1 = isNumber$2;

const toRegexRange$1 = (min, max, options) => {
  if (isNumber$1(min) === false) {
    throw new TypeError('toRegexRange: expected the first argument to be a number');
  }

  if (max === void 0 || min === max) {
    return String(min);
  }

  if (isNumber$1(max) === false) {
    throw new TypeError('toRegexRange: expected the second argument to be a number.');
  }

  let opts = { relaxZeros: true, ...options };
  if (typeof opts.strictZeros === 'boolean') {
    opts.relaxZeros = opts.strictZeros === false;
  }

  let relax = String(opts.relaxZeros);
  let shorthand = String(opts.shorthand);
  let capture = String(opts.capture);
  let wrap = String(opts.wrap);
  let cacheKey = min + ':' + max + '=' + relax + shorthand + capture + wrap;

  if (toRegexRange$1.cache.hasOwnProperty(cacheKey)) {
    return toRegexRange$1.cache[cacheKey].result;
  }

  let a = Math.min(min, max);
  let b = Math.max(min, max);

  if (Math.abs(a - b) === 1) {
    let result = min + '|' + max;
    if (opts.capture) {
      return `(${result})`;
    }
    if (opts.wrap === false) {
      return result;
    }
    return `(?:${result})`;
  }

  let isPadded = hasPadding(min) || hasPadding(max);
  let state = { min, max, a, b };
  let positives = [];
  let negatives = [];

  if (isPadded) {
    state.isPadded = isPadded;
    state.maxLen = String(state.max).length;
  }

  if (a < 0) {
    let newMin = b < 0 ? Math.abs(b) : 1;
    negatives = splitToPatterns(newMin, Math.abs(a), state, opts);
    a = state.a = 0;
  }

  if (b >= 0) {
    positives = splitToPatterns(a, b, state, opts);
  }

  state.negatives = negatives;
  state.positives = positives;
  state.result = collatePatterns(negatives, positives);

  if (opts.capture === true) {
    state.result = `(${state.result})`;
  } else if (opts.wrap !== false && (positives.length + negatives.length) > 1) {
    state.result = `(?:${state.result})`;
  }

  toRegexRange$1.cache[cacheKey] = state;
  return state.result;
};

function collatePatterns(neg, pos, options) {
  let onlyNegative = filterPatterns(neg, pos, '-', false) || [];
  let onlyPositive = filterPatterns(pos, neg, '', false) || [];
  let intersected = filterPatterns(neg, pos, '-?', true) || [];
  let subpatterns = onlyNegative.concat(intersected).concat(onlyPositive);
  return subpatterns.join('|');
}

function splitToRanges(min, max) {
  let nines = 1;
  let zeros = 1;

  let stop = countNines(min, nines);
  let stops = new Set([max]);

  while (min <= stop && stop <= max) {
    stops.add(stop);
    nines += 1;
    stop = countNines(min, nines);
  }

  stop = countZeros(max + 1, zeros) - 1;

  while (min < stop && stop <= max) {
    stops.add(stop);
    zeros += 1;
    stop = countZeros(max + 1, zeros) - 1;
  }

  stops = [...stops];
  stops.sort(compare);
  return stops;
}

/**
 * Convert a range to a regex pattern
 * @param {Number} `start`
 * @param {Number} `stop`
 * @return {String}
 */

function rangeToPattern(start, stop, options) {
  if (start === stop) {
    return { pattern: start, count: [], digits: 0 };
  }

  let zipped = zip(start, stop);
  let digits = zipped.length;
  let pattern = '';
  let count = 0;

  for (let i = 0; i < digits; i++) {
    let [startDigit, stopDigit] = zipped[i];

    if (startDigit === stopDigit) {
      pattern += startDigit;

    } else if (startDigit !== '0' || stopDigit !== '9') {
      pattern += toCharacterClass(startDigit, stopDigit);

    } else {
      count++;
    }
  }

  if (count) {
    pattern += options.shorthand === true ? '\\d' : '[0-9]';
  }

  return { pattern, count: [count], digits };
}

function splitToPatterns(min, max, tok, options) {
  let ranges = splitToRanges(min, max);
  let tokens = [];
  let start = min;
  let prev;

  for (let i = 0; i < ranges.length; i++) {
    let max = ranges[i];
    let obj = rangeToPattern(String(start), String(max), options);
    let zeros = '';

    if (!tok.isPadded && prev && prev.pattern === obj.pattern) {
      if (prev.count.length > 1) {
        prev.count.pop();
      }

      prev.count.push(obj.count[0]);
      prev.string = prev.pattern + toQuantifier(prev.count);
      start = max + 1;
      continue;
    }

    if (tok.isPadded) {
      zeros = padZeros(max, tok, options);
    }

    obj.string = zeros + obj.pattern + toQuantifier(obj.count);
    tokens.push(obj);
    start = max + 1;
    prev = obj;
  }

  return tokens;
}

function filterPatterns(arr, comparison, prefix, intersection, options) {
  let result = [];

  for (let ele of arr) {
    let { string } = ele;

    // only push if _both_ are negative...
    if (!intersection && !contains(comparison, 'string', string)) {
      result.push(prefix + string);
    }

    // or _both_ are positive
    if (intersection && contains(comparison, 'string', string)) {
      result.push(prefix + string);
    }
  }
  return result;
}

/**
 * Zip strings
 */

function zip(a, b) {
  let arr = [];
  for (let i = 0; i < a.length; i++) arr.push([a[i], b[i]]);
  return arr;
}

function compare(a, b) {
  return a > b ? 1 : b > a ? -1 : 0;
}

function contains(arr, key, val) {
  return arr.some(ele => ele[key] === val);
}

function countNines(min, len) {
  return Number(String(min).slice(0, -len) + '9'.repeat(len));
}

function countZeros(integer, zeros) {
  return integer - (integer % Math.pow(10, zeros));
}

function toQuantifier(digits) {
  let [start = 0, stop = ''] = digits;
  if (stop || start > 1) {
    return `{${start + (stop ? ',' + stop : '')}}`;
  }
  return '';
}

function toCharacterClass(a, b, options) {
  return `[${a}${(b - a === 1) ? '' : '-'}${b}]`;
}

function hasPadding(str) {
  return /^-?(0+)\d/.test(str);
}

function padZeros(value, tok, options) {
  if (!tok.isPadded) {
    return value;
  }

  let diff = Math.abs(tok.maxLen - String(value).length);
  let relax = options.relaxZeros !== false;

  switch (diff) {
    case 0:
      return '';
    case 1:
      return relax ? '0?' : '0';
    case 2:
      return relax ? '0{0,2}' : '00';
    default: {
      return relax ? `0{0,${diff}}` : `0{${diff}}`;
    }
  }
}

/**
 * Cache
 */

toRegexRange$1.cache = {};
toRegexRange$1.clearCache = () => (toRegexRange$1.cache = {});

/**
 * Expose `toRegexRange`
 */

var toRegexRange_1 = toRegexRange$1;

/*!
 * fill-range <https://github.com/jonschlinkert/fill-range>
 *
 * Copyright (c) 2014-present, Jon Schlinkert.
 * Licensed under the MIT License.
 */

const util = require$$2;
const toRegexRange = toRegexRange_1;

const isObject = val => val !== null && typeof val === 'object' && !Array.isArray(val);

const transform = toNumber => {
  return value => toNumber === true ? Number(value) : String(value);
};

const isValidValue = value => {
  return typeof value === 'number' || (typeof value === 'string' && value !== '');
};

const isNumber = num => Number.isInteger(+num);

const zeros = input => {
  let value = `${input}`;
  let index = -1;
  if (value[0] === '-') value = value.slice(1);
  if (value === '0') return false;
  while (value[++index] === '0');
  return index > 0;
};

const stringify$3 = (start, end, options) => {
  if (typeof start === 'string' || typeof end === 'string') {
    return true;
  }
  return options.stringify === true;
};

const pad = (input, maxLength, toNumber) => {
  if (maxLength > 0) {
    let dash = input[0] === '-' ? '-' : '';
    if (dash) input = input.slice(1);
    input = (dash + input.padStart(dash ? maxLength - 1 : maxLength, '0'));
  }
  if (toNumber === false) {
    return String(input);
  }
  return input;
};

const toMaxLen = (input, maxLength) => {
  let negative = input[0] === '-' ? '-' : '';
  if (negative) {
    input = input.slice(1);
    maxLength--;
  }
  while (input.length < maxLength) input = '0' + input;
  return negative ? ('-' + input) : input;
};

const toSequence = (parts, options) => {
  parts.negatives.sort((a, b) => a < b ? -1 : a > b ? 1 : 0);
  parts.positives.sort((a, b) => a < b ? -1 : a > b ? 1 : 0);

  let prefix = options.capture ? '' : '?:';
  let positives = '';
  let negatives = '';
  let result;

  if (parts.positives.length) {
    positives = parts.positives.join('|');
  }

  if (parts.negatives.length) {
    negatives = `-(${prefix}${parts.negatives.join('|')})`;
  }

  if (positives && negatives) {
    result = `${positives}|${negatives}`;
  } else {
    result = positives || negatives;
  }

  if (options.wrap) {
    return `(${prefix}${result})`;
  }

  return result;
};

const toRange = (a, b, isNumbers, options) => {
  if (isNumbers) {
    return toRegexRange(a, b, { wrap: false, ...options });
  }

  let start = String.fromCharCode(a);
  if (a === b) return start;

  let stop = String.fromCharCode(b);
  return `[${start}-${stop}]`;
};

const toRegex = (start, end, options) => {
  if (Array.isArray(start)) {
    let wrap = options.wrap === true;
    let prefix = options.capture ? '' : '?:';
    return wrap ? `(${prefix}${start.join('|')})` : start.join('|');
  }
  return toRegexRange(start, end, options);
};

const rangeError = (...args) => {
  return new RangeError('Invalid range arguments: ' + util.inspect(...args));
};

const invalidRange = (start, end, options) => {
  if (options.strictRanges === true) throw rangeError([start, end]);
  return [];
};

const invalidStep = (step, options) => {
  if (options.strictRanges === true) {
    throw new TypeError(`Expected step "${step}" to be a number`);
  }
  return [];
};

const fillNumbers = (start, end, step = 1, options = {}) => {
  let a = Number(start);
  let b = Number(end);

  if (!Number.isInteger(a) || !Number.isInteger(b)) {
    if (options.strictRanges === true) throw rangeError([start, end]);
    return [];
  }

  // fix negative zero
  if (a === 0) a = 0;
  if (b === 0) b = 0;

  let descending = a > b;
  let startString = String(start);
  let endString = String(end);
  let stepString = String(step);
  step = Math.max(Math.abs(step), 1);

  let padded = zeros(startString) || zeros(endString) || zeros(stepString);
  let maxLen = padded ? Math.max(startString.length, endString.length, stepString.length) : 0;
  let toNumber = padded === false && stringify$3(start, end, options) === false;
  let format = options.transform || transform(toNumber);

  if (options.toRegex && step === 1) {
    return toRange(toMaxLen(start, maxLen), toMaxLen(end, maxLen), true, options);
  }

  let parts = { negatives: [], positives: [] };
  let push = num => parts[num < 0 ? 'negatives' : 'positives'].push(Math.abs(num));
  let range = [];
  let index = 0;

  while (descending ? a >= b : a <= b) {
    if (options.toRegex === true && step > 1) {
      push(a);
    } else {
      range.push(pad(format(a, index), maxLen, toNumber));
    }
    a = descending ? a - step : a + step;
    index++;
  }

  if (options.toRegex === true) {
    return step > 1
      ? toSequence(parts, options)
      : toRegex(range, null, { wrap: false, ...options });
  }

  return range;
};

const fillLetters = (start, end, step = 1, options = {}) => {
  if ((!isNumber(start) && start.length > 1) || (!isNumber(end) && end.length > 1)) {
    return invalidRange(start, end, options);
  }


  let format = options.transform || (val => String.fromCharCode(val));
  let a = `${start}`.charCodeAt(0);
  let b = `${end}`.charCodeAt(0);

  let descending = a > b;
  let min = Math.min(a, b);
  let max = Math.max(a, b);

  if (options.toRegex && step === 1) {
    return toRange(min, max, false, options);
  }

  let range = [];
  let index = 0;

  while (descending ? a >= b : a <= b) {
    range.push(format(a, index));
    a = descending ? a - step : a + step;
    index++;
  }

  if (options.toRegex === true) {
    return toRegex(range, null, { wrap: false, options });
  }

  return range;
};

const fill$2 = (start, end, step, options = {}) => {
  if (end == null && isValidValue(start)) {
    return [start];
  }

  if (!isValidValue(start) || !isValidValue(end)) {
    return invalidRange(start, end, options);
  }

  if (typeof step === 'function') {
    return fill$2(start, end, 1, { transform: step });
  }

  if (isObject(step)) {
    return fill$2(start, end, 0, step);
  }

  let opts = { ...options };
  if (opts.capture === true) opts.wrap = true;
  step = step || opts.step || 1;

  if (!isNumber(step)) {
    if (step != null && !isObject(step)) return invalidStep(step, opts);
    return fill$2(start, end, 1, step);
  }

  if (isNumber(start) && isNumber(end)) {
    return fillNumbers(start, end, step, opts);
  }

  return fillLetters(start, end, Math.max(Math.abs(step), 1), opts);
};

var fillRange = fill$2;

const fill$1 = fillRange;
const utils$1 = utils$3;

const compile$1 = (ast, options = {}) => {
  let walk = (node, parent = {}) => {
    let invalidBlock = utils$1.isInvalidBrace(parent);
    let invalidNode = node.invalid === true && options.escapeInvalid === true;
    let invalid = invalidBlock === true || invalidNode === true;
    let prefix = options.escapeInvalid === true ? '\\' : '';
    let output = '';

    if (node.isOpen === true) {
      return prefix + node.value;
    }
    if (node.isClose === true) {
      return prefix + node.value;
    }

    if (node.type === 'open') {
      return invalid ? (prefix + node.value) : '(';
    }

    if (node.type === 'close') {
      return invalid ? (prefix + node.value) : ')';
    }

    if (node.type === 'comma') {
      return node.prev.type === 'comma' ? '' : (invalid ? node.value : '|');
    }

    if (node.value) {
      return node.value;
    }

    if (node.nodes && node.ranges > 0) {
      let args = utils$1.reduce(node.nodes);
      let range = fill$1(...args, { ...options, wrap: false, toRegex: true });

      if (range.length !== 0) {
        return args.length > 1 && range.length > 1 ? `(${range})` : range;
      }
    }

    if (node.nodes) {
      for (let child of node.nodes) {
        output += walk(child, node);
      }
    }
    return output;
  };

  return walk(ast);
};

var compile_1 = compile$1;

const fill = fillRange;
const stringify$2 = stringify$4;
const utils = utils$3;

const append = (queue = '', stash = '', enclose = false) => {
  let result = [];

  queue = [].concat(queue);
  stash = [].concat(stash);

  if (!stash.length) return queue;
  if (!queue.length) {
    return enclose ? utils.flatten(stash).map(ele => `{${ele}}`) : stash;
  }

  for (let item of queue) {
    if (Array.isArray(item)) {
      for (let value of item) {
        result.push(append(value, stash, enclose));
      }
    } else {
      for (let ele of stash) {
        if (enclose === true && typeof ele === 'string') ele = `{${ele}}`;
        result.push(Array.isArray(ele) ? append(item, ele, enclose) : (item + ele));
      }
    }
  }
  return utils.flatten(result);
};

const expand$1 = (ast, options = {}) => {
  let rangeLimit = options.rangeLimit === void 0 ? 1000 : options.rangeLimit;

  let walk = (node, parent = {}) => {
    node.queue = [];

    let p = parent;
    let q = parent.queue;

    while (p.type !== 'brace' && p.type !== 'root' && p.parent) {
      p = p.parent;
      q = p.queue;
    }

    if (node.invalid || node.dollar) {
      q.push(append(q.pop(), stringify$2(node, options)));
      return;
    }

    if (node.type === 'brace' && node.invalid !== true && node.nodes.length === 2) {
      q.push(append(q.pop(), ['{}']));
      return;
    }

    if (node.nodes && node.ranges > 0) {
      let args = utils.reduce(node.nodes);

      if (utils.exceedsLimit(...args, options.step, rangeLimit)) {
        throw new RangeError('expanded array length exceeds range limit. Use options.rangeLimit to increase or disable the limit.');
      }

      let range = fill(...args, options);
      if (range.length === 0) {
        range = stringify$2(node, options);
      }

      q.push(append(q.pop(), range));
      node.nodes = [];
      return;
    }

    let enclose = utils.encloseBrace(node);
    let queue = node.queue;
    let block = node;

    while (block.type !== 'brace' && block.type !== 'root' && block.parent) {
      block = block.parent;
      queue = block.queue;
    }

    for (let i = 0; i < node.nodes.length; i++) {
      let child = node.nodes[i];

      if (child.type === 'comma' && node.type === 'brace') {
        if (i === 1) queue.push('');
        queue.push('');
        continue;
      }

      if (child.type === 'close') {
        q.push(append(q.pop(), queue, enclose));
        continue;
      }

      if (child.value && child.type !== 'open') {
        queue.push(append(queue.pop(), child.value));
        continue;
      }

      if (child.nodes) {
        walk(child, node);
      }
    }

    return queue;
  };

  return utils.flatten(walk(ast));
};

var expand_1 = expand$1;

var constants$1 = {
  MAX_LENGTH: 1024 * 64,

  // Digits
  CHAR_0: '0', /* 0 */
  CHAR_9: '9', /* 9 */

  // Alphabet chars.
  CHAR_UPPERCASE_A: 'A', /* A */
  CHAR_LOWERCASE_A: 'a', /* a */
  CHAR_UPPERCASE_Z: 'Z', /* Z */
  CHAR_LOWERCASE_Z: 'z', /* z */

  CHAR_LEFT_PARENTHESES: '(', /* ( */
  CHAR_RIGHT_PARENTHESES: ')', /* ) */

  CHAR_ASTERISK: '*', /* * */

  // Non-alphabetic chars.
  CHAR_AMPERSAND: '&', /* & */
  CHAR_AT: '@', /* @ */
  CHAR_BACKSLASH: '\\', /* \ */
  CHAR_BACKTICK: '`', /* ` */
  CHAR_CARRIAGE_RETURN: '\r', /* \r */
  CHAR_CIRCUMFLEX_ACCENT: '^', /* ^ */
  CHAR_COLON: ':', /* : */
  CHAR_COMMA: ',', /* , */
  CHAR_DOLLAR: '$', /* . */
  CHAR_DOT: '.', /* . */
  CHAR_DOUBLE_QUOTE: '"', /* " */
  CHAR_EQUAL: '=', /* = */
  CHAR_EXCLAMATION_MARK: '!', /* ! */
  CHAR_FORM_FEED: '\f', /* \f */
  CHAR_FORWARD_SLASH: '/', /* / */
  CHAR_HASH: '#', /* # */
  CHAR_HYPHEN_MINUS: '-', /* - */
  CHAR_LEFT_ANGLE_BRACKET: '<', /* < */
  CHAR_LEFT_CURLY_BRACE: '{', /* { */
  CHAR_LEFT_SQUARE_BRACKET: '[', /* [ */
  CHAR_LINE_FEED: '\n', /* \n */
  CHAR_NO_BREAK_SPACE: '\u00A0', /* \u00A0 */
  CHAR_PERCENT: '%', /* % */
  CHAR_PLUS: '+', /* + */
  CHAR_QUESTION_MARK: '?', /* ? */
  CHAR_RIGHT_ANGLE_BRACKET: '>', /* > */
  CHAR_RIGHT_CURLY_BRACE: '}', /* } */
  CHAR_RIGHT_SQUARE_BRACKET: ']', /* ] */
  CHAR_SEMICOLON: ';', /* ; */
  CHAR_SINGLE_QUOTE: '\'', /* ' */
  CHAR_SPACE: ' ', /*   */
  CHAR_TAB: '\t', /* \t */
  CHAR_UNDERSCORE: '_', /* _ */
  CHAR_VERTICAL_LINE: '|', /* | */
  CHAR_ZERO_WIDTH_NOBREAK_SPACE: '\uFEFF' /* \uFEFF */
};

const stringify$1 = stringify$4;

/**
 * Constants
 */

const {
  MAX_LENGTH,
  CHAR_BACKSLASH, /* \ */
  CHAR_BACKTICK, /* ` */
  CHAR_COMMA, /* , */
  CHAR_DOT, /* . */
  CHAR_LEFT_PARENTHESES, /* ( */
  CHAR_RIGHT_PARENTHESES, /* ) */
  CHAR_LEFT_CURLY_BRACE, /* { */
  CHAR_RIGHT_CURLY_BRACE, /* } */
  CHAR_LEFT_SQUARE_BRACKET, /* [ */
  CHAR_RIGHT_SQUARE_BRACKET, /* ] */
  CHAR_DOUBLE_QUOTE, /* " */
  CHAR_SINGLE_QUOTE, /* ' */
  CHAR_NO_BREAK_SPACE,
  CHAR_ZERO_WIDTH_NOBREAK_SPACE
} = constants$1;

/**
 * parse
 */

const parse$1 = (input, options = {}) => {
  if (typeof input !== 'string') {
    throw new TypeError('Expected a string');
  }

  let opts = options || {};
  let max = typeof opts.maxLength === 'number' ? Math.min(MAX_LENGTH, opts.maxLength) : MAX_LENGTH;
  if (input.length > max) {
    throw new SyntaxError(`Input length (${input.length}), exceeds max characters (${max})`);
  }

  let ast = { type: 'root', input, nodes: [] };
  let stack = [ast];
  let block = ast;
  let prev = ast;
  let brackets = 0;
  let length = input.length;
  let index = 0;
  let depth = 0;
  let value;

  /**
   * Helpers
   */

  const advance = () => input[index++];
  const push = node => {
    if (node.type === 'text' && prev.type === 'dot') {
      prev.type = 'text';
    }

    if (prev && prev.type === 'text' && node.type === 'text') {
      prev.value += node.value;
      return;
    }

    block.nodes.push(node);
    node.parent = block;
    node.prev = prev;
    prev = node;
    return node;
  };

  push({ type: 'bos' });

  while (index < length) {
    block = stack[stack.length - 1];
    value = advance();

    /**
     * Invalid chars
     */

    if (value === CHAR_ZERO_WIDTH_NOBREAK_SPACE || value === CHAR_NO_BREAK_SPACE) {
      continue;
    }

    /**
     * Escaped chars
     */

    if (value === CHAR_BACKSLASH) {
      push({ type: 'text', value: (options.keepEscaping ? value : '') + advance() });
      continue;
    }

    /**
     * Right square bracket (literal): ']'
     */

    if (value === CHAR_RIGHT_SQUARE_BRACKET) {
      push({ type: 'text', value: '\\' + value });
      continue;
    }

    /**
     * Left square bracket: '['
     */

    if (value === CHAR_LEFT_SQUARE_BRACKET) {
      brackets++;
      let next;

      while (index < length && (next = advance())) {
        value += next;

        if (next === CHAR_LEFT_SQUARE_BRACKET) {
          brackets++;
          continue;
        }

        if (next === CHAR_BACKSLASH) {
          value += advance();
          continue;
        }

        if (next === CHAR_RIGHT_SQUARE_BRACKET) {
          brackets--;

          if (brackets === 0) {
            break;
          }
        }
      }

      push({ type: 'text', value });
      continue;
    }

    /**
     * Parentheses
     */

    if (value === CHAR_LEFT_PARENTHESES) {
      block = push({ type: 'paren', nodes: [] });
      stack.push(block);
      push({ type: 'text', value });
      continue;
    }

    if (value === CHAR_RIGHT_PARENTHESES) {
      if (block.type !== 'paren') {
        push({ type: 'text', value });
        continue;
      }
      block = stack.pop();
      push({ type: 'text', value });
      block = stack[stack.length - 1];
      continue;
    }

    /**
     * Quotes: '|"|`
     */

    if (value === CHAR_DOUBLE_QUOTE || value === CHAR_SINGLE_QUOTE || value === CHAR_BACKTICK) {
      let open = value;
      let next;

      if (options.keepQuotes !== true) {
        value = '';
      }

      while (index < length && (next = advance())) {
        if (next === CHAR_BACKSLASH) {
          value += next + advance();
          continue;
        }

        if (next === open) {
          if (options.keepQuotes === true) value += next;
          break;
        }

        value += next;
      }

      push({ type: 'text', value });
      continue;
    }

    /**
     * Left curly brace: '{'
     */

    if (value === CHAR_LEFT_CURLY_BRACE) {
      depth++;

      let dollar = prev.value && prev.value.slice(-1) === '$' || block.dollar === true;
      let brace = {
        type: 'brace',
        open: true,
        close: false,
        dollar,
        depth,
        commas: 0,
        ranges: 0,
        nodes: []
      };

      block = push(brace);
      stack.push(block);
      push({ type: 'open', value });
      continue;
    }

    /**
     * Right curly brace: '}'
     */

    if (value === CHAR_RIGHT_CURLY_BRACE) {
      if (block.type !== 'brace') {
        push({ type: 'text', value });
        continue;
      }

      let type = 'close';
      block = stack.pop();
      block.close = true;

      push({ type, value });
      depth--;

      block = stack[stack.length - 1];
      continue;
    }

    /**
     * Comma: ','
     */

    if (value === CHAR_COMMA && depth > 0) {
      if (block.ranges > 0) {
        block.ranges = 0;
        let open = block.nodes.shift();
        block.nodes = [open, { type: 'text', value: stringify$1(block) }];
      }

      push({ type: 'comma', value });
      block.commas++;
      continue;
    }

    /**
     * Dot: '.'
     */

    if (value === CHAR_DOT && depth > 0 && block.commas === 0) {
      let siblings = block.nodes;

      if (depth === 0 || siblings.length === 0) {
        push({ type: 'text', value });
        continue;
      }

      if (prev.type === 'dot') {
        block.range = [];
        prev.value += value;
        prev.type = 'range';

        if (block.nodes.length !== 3 && block.nodes.length !== 5) {
          block.invalid = true;
          block.ranges = 0;
          prev.type = 'text';
          continue;
        }

        block.ranges++;
        block.args = [];
        continue;
      }

      if (prev.type === 'range') {
        siblings.pop();

        let before = siblings[siblings.length - 1];
        before.value += prev.value + value;
        prev = before;
        block.ranges--;
        continue;
      }

      push({ type: 'dot', value });
      continue;
    }

    /**
     * Text
     */

    push({ type: 'text', value });
  }

  // Mark imbalanced braces and brackets as invalid
  do {
    block = stack.pop();

    if (block.type !== 'root') {
      block.nodes.forEach(node => {
        if (!node.nodes) {
          if (node.type === 'open') node.isOpen = true;
          if (node.type === 'close') node.isClose = true;
          if (!node.nodes) node.type = 'text';
          node.invalid = true;
        }
      });

      // get the location of the block on parent.nodes (block's siblings)
      let parent = stack[stack.length - 1];
      let index = parent.nodes.indexOf(block);
      // replace the (invalid) block with it's nodes
      parent.nodes.splice(index, 1, ...block.nodes);
    }
  } while (stack.length > 0);

  push({ type: 'eos' });
  return ast;
};

var parse_1 = parse$1;

const stringify = stringify$4;
const compile = compile_1;
const expand = expand_1;
const parse = parse_1;

/**
 * Expand the given pattern or create a regex-compatible string.
 *
 * ```js
 * const braces = require('braces');
 * console.log(braces('{a,b,c}', { compile: true })); //=> ['(a|b|c)']
 * console.log(braces('{a,b,c}')); //=> ['a', 'b', 'c']
 * ```
 * @param {String} `str`
 * @param {Object} `options`
 * @return {String}
 * @api public
 */

const braces$1 = (input, options = {}) => {
  let output = [];

  if (Array.isArray(input)) {
    for (let pattern of input) {
      let result = braces$1.create(pattern, options);
      if (Array.isArray(result)) {
        output.push(...result);
      } else {
        output.push(result);
      }
    }
  } else {
    output = [].concat(braces$1.create(input, options));
  }

  if (options && options.expand === true && options.nodupes === true) {
    output = [...new Set(output)];
  }
  return output;
};

/**
 * Parse the given `str` with the given `options`.
 *
 * ```js
 * // braces.parse(pattern, [, options]);
 * const ast = braces.parse('a/{b,c}/d');
 * console.log(ast);
 * ```
 * @param {String} pattern Brace pattern to parse
 * @param {Object} options
 * @return {Object} Returns an AST
 * @api public
 */

braces$1.parse = (input, options = {}) => parse(input, options);

/**
 * Creates a braces string from an AST, or an AST node.
 *
 * ```js
 * const braces = require('braces');
 * let ast = braces.parse('foo/{a,b}/bar');
 * console.log(stringify(ast.nodes[2])); //=> '{a,b}'
 * ```
 * @param {String} `input` Brace pattern or AST.
 * @param {Object} `options`
 * @return {Array} Returns an array of expanded values.
 * @api public
 */

braces$1.stringify = (input, options = {}) => {
  if (typeof input === 'string') {
    return stringify(braces$1.parse(input, options), options);
  }
  return stringify(input, options);
};

/**
 * Compiles a brace pattern into a regex-compatible, optimized string.
 * This method is called by the main [braces](#braces) function by default.
 *
 * ```js
 * const braces = require('braces');
 * console.log(braces.compile('a/{b,c}/d'));
 * //=> ['a/(b|c)/d']
 * ```
 * @param {String} `input` Brace pattern or AST.
 * @param {Object} `options`
 * @return {Array} Returns an array of expanded values.
 * @api public
 */

braces$1.compile = (input, options = {}) => {
  if (typeof input === 'string') {
    input = braces$1.parse(input, options);
  }
  return compile(input, options);
};

/**
 * Expands a brace pattern into an array. This method is called by the
 * main [braces](#braces) function when `options.expand` is true. Before
 * using this method it's recommended that you read the [performance notes](#performance))
 * and advantages of using [.compile](#compile) instead.
 *
 * ```js
 * const braces = require('braces');
 * console.log(braces.expand('a/{b,c}/d'));
 * //=> ['a/b/d', 'a/c/d'];
 * ```
 * @param {String} `pattern` Brace pattern
 * @param {Object} `options`
 * @return {Array} Returns an array of expanded values.
 * @api public
 */

braces$1.expand = (input, options = {}) => {
  if (typeof input === 'string') {
    input = braces$1.parse(input, options);
  }

  let result = expand(input, options);

  // filter out empty strings if specified
  if (options.noempty === true) {
    result = result.filter(Boolean);
  }

  // filter out duplicates if specified
  if (options.nodupes === true) {
    result = [...new Set(result)];
  }

  return result;
};

/**
 * Processes a brace pattern and returns either an expanded array
 * (if `options.expand` is true), a highly optimized regex-compatible string.
 * This method is called by the main [braces](#braces) function.
 *
 * ```js
 * const braces = require('braces');
 * console.log(braces.create('user-{200..300}/project-{a,b,c}-{1..10}'))
 * //=> 'user-(20[0-9]|2[1-9][0-9]|300)/project-(a|b|c)-([1-9]|10)'
 * ```
 * @param {String} `pattern` Brace pattern
 * @param {Object} `options`
 * @return {Array} Returns an array of expanded values.
 * @api public
 */

braces$1.create = (input, options = {}) => {
  if (input === '' || input.length < 3) {
    return [input];
  }

 return options.expand !== true
    ? braces$1.compile(input, options)
    : braces$1.expand(input, options);
};

/**
 * Expose "braces"
 */

var braces_1 = braces$1;

var binaryExtensionsExports = {};
var binaryExtensions$1 = {
  get exports(){ return binaryExtensionsExports; },
  set exports(v){ binaryExtensionsExports = v; },
};

const require$$0 = [
	"3dm",
	"3ds",
	"3g2",
	"3gp",
	"7z",
	"a",
	"aac",
	"adp",
	"ai",
	"aif",
	"aiff",
	"alz",
	"ape",
	"apk",
	"appimage",
	"ar",
	"arj",
	"asf",
	"au",
	"avi",
	"bak",
	"baml",
	"bh",
	"bin",
	"bk",
	"bmp",
	"btif",
	"bz2",
	"bzip2",
	"cab",
	"caf",
	"cgm",
	"class",
	"cmx",
	"cpio",
	"cr2",
	"cur",
	"dat",
	"dcm",
	"deb",
	"dex",
	"djvu",
	"dll",
	"dmg",
	"dng",
	"doc",
	"docm",
	"docx",
	"dot",
	"dotm",
	"dra",
	"DS_Store",
	"dsk",
	"dts",
	"dtshd",
	"dvb",
	"dwg",
	"dxf",
	"ecelp4800",
	"ecelp7470",
	"ecelp9600",
	"egg",
	"eol",
	"eot",
	"epub",
	"exe",
	"f4v",
	"fbs",
	"fh",
	"fla",
	"flac",
	"flatpak",
	"fli",
	"flv",
	"fpx",
	"fst",
	"fvt",
	"g3",
	"gh",
	"gif",
	"graffle",
	"gz",
	"gzip",
	"h261",
	"h263",
	"h264",
	"icns",
	"ico",
	"ief",
	"img",
	"ipa",
	"iso",
	"jar",
	"jpeg",
	"jpg",
	"jpgv",
	"jpm",
	"jxr",
	"key",
	"ktx",
	"lha",
	"lib",
	"lvp",
	"lz",
	"lzh",
	"lzma",
	"lzo",
	"m3u",
	"m4a",
	"m4v",
	"mar",
	"mdi",
	"mht",
	"mid",
	"midi",
	"mj2",
	"mka",
	"mkv",
	"mmr",
	"mng",
	"mobi",
	"mov",
	"movie",
	"mp3",
	"mp4",
	"mp4a",
	"mpeg",
	"mpg",
	"mpga",
	"mxu",
	"nef",
	"npx",
	"numbers",
	"nupkg",
	"o",
	"odp",
	"ods",
	"odt",
	"oga",
	"ogg",
	"ogv",
	"otf",
	"ott",
	"pages",
	"pbm",
	"pcx",
	"pdb",
	"pdf",
	"pea",
	"pgm",
	"pic",
	"png",
	"pnm",
	"pot",
	"potm",
	"potx",
	"ppa",
	"ppam",
	"ppm",
	"pps",
	"ppsm",
	"ppsx",
	"ppt",
	"pptm",
	"pptx",
	"psd",
	"pya",
	"pyc",
	"pyo",
	"pyv",
	"qt",
	"rar",
	"ras",
	"raw",
	"resources",
	"rgb",
	"rip",
	"rlc",
	"rmf",
	"rmvb",
	"rpm",
	"rtf",
	"rz",
	"s3m",
	"s7z",
	"scpt",
	"sgi",
	"shar",
	"snap",
	"sil",
	"sketch",
	"slk",
	"smv",
	"snk",
	"so",
	"stl",
	"suo",
	"sub",
	"swf",
	"tar",
	"tbz",
	"tbz2",
	"tga",
	"tgz",
	"thmx",
	"tif",
	"tiff",
	"tlz",
	"ttc",
	"ttf",
	"txz",
	"udf",
	"uvh",
	"uvi",
	"uvm",
	"uvp",
	"uvs",
	"uvu",
	"viv",
	"vob",
	"war",
	"wav",
	"wax",
	"wbmp",
	"wdp",
	"weba",
	"webm",
	"webp",
	"whl",
	"wim",
	"wm",
	"wma",
	"wmv",
	"wmx",
	"woff",
	"woff2",
	"wrm",
	"wvx",
	"xbm",
	"xif",
	"xla",
	"xlam",
	"xls",
	"xlsb",
	"xlsm",
	"xlsx",
	"xlt",
	"xltm",
	"xltx",
	"xm",
	"xmind",
	"xpi",
	"xpm",
	"xwd",
	"xz",
	"z",
	"zip",
	"zipx"
];

(function (module) {
	module.exports = require$$0;
} (binaryExtensions$1));

const path = require$$0$2;
const binaryExtensions = binaryExtensionsExports;

const extensions = new Set(binaryExtensions);

var isBinaryPath$1 = filePath => extensions.has(path.extname(filePath).slice(1).toLowerCase());

var constants = {};

(function (exports) {

	const {sep} = require$$0$2;
	const {platform} = process;
	const os = require$$2$1;

	exports.EV_ALL = 'all';
	exports.EV_READY = 'ready';
	exports.EV_ADD = 'add';
	exports.EV_CHANGE = 'change';
	exports.EV_ADD_DIR = 'addDir';
	exports.EV_UNLINK = 'unlink';
	exports.EV_UNLINK_DIR = 'unlinkDir';
	exports.EV_RAW = 'raw';
	exports.EV_ERROR = 'error';

	exports.STR_DATA = 'data';
	exports.STR_END = 'end';
	exports.STR_CLOSE = 'close';

	exports.FSEVENT_CREATED = 'created';
	exports.FSEVENT_MODIFIED = 'modified';
	exports.FSEVENT_DELETED = 'deleted';
	exports.FSEVENT_MOVED = 'moved';
	exports.FSEVENT_CLONED = 'cloned';
	exports.FSEVENT_UNKNOWN = 'unknown';
	exports.FSEVENT_TYPE_FILE = 'file';
	exports.FSEVENT_TYPE_DIRECTORY = 'directory';
	exports.FSEVENT_TYPE_SYMLINK = 'symlink';

	exports.KEY_LISTENERS = 'listeners';
	exports.KEY_ERR = 'errHandlers';
	exports.KEY_RAW = 'rawEmitters';
	exports.HANDLER_KEYS = [exports.KEY_LISTENERS, exports.KEY_ERR, exports.KEY_RAW];

	exports.DOT_SLASH = `.${sep}`;

	exports.BACK_SLASH_RE = /\\/g;
	exports.DOUBLE_SLASH_RE = /\/\//;
	exports.SLASH_OR_BACK_SLASH_RE = /[/\\]/;
	exports.DOT_RE = /\..*\.(sw[px])$|~$|\.subl.*\.tmp/;
	exports.REPLACER_RE = /^\.[/\\]/;

	exports.SLASH = '/';
	exports.SLASH_SLASH = '//';
	exports.BRACE_START = '{';
	exports.BANG = '!';
	exports.ONE_DOT = '.';
	exports.TWO_DOTS = '..';
	exports.STAR = '*';
	exports.GLOBSTAR = '**';
	exports.ROOT_GLOBSTAR = '/**/*';
	exports.SLASH_GLOBSTAR = '/**';
	exports.DIR_SUFFIX = 'Dir';
	exports.ANYMATCH_OPTS = {dot: true};
	exports.STRING_TYPE = 'string';
	exports.FUNCTION_TYPE = 'function';
	exports.EMPTY_STR = '';
	exports.EMPTY_FN = () => {};
	exports.IDENTITY_FN = val => val;

	exports.isWindows = platform === 'win32';
	exports.isMacos = platform === 'darwin';
	exports.isLinux = platform === 'linux';
	exports.isIBMi = os.type() === 'OS400';
} (constants));

const fs$2 = require$$0$1;
const sysPath$2 = require$$0$2;
const { promisify: promisify$2 } = require$$2;
const isBinaryPath = isBinaryPath$1;
const {
  isWindows: isWindows$1,
  isLinux,
  EMPTY_FN: EMPTY_FN$2,
  EMPTY_STR: EMPTY_STR$1,
  KEY_LISTENERS,
  KEY_ERR,
  KEY_RAW,
  HANDLER_KEYS,
  EV_CHANGE: EV_CHANGE$2,
  EV_ADD: EV_ADD$2,
  EV_ADD_DIR: EV_ADD_DIR$2,
  EV_ERROR: EV_ERROR$2,
  STR_DATA: STR_DATA$1,
  STR_END: STR_END$2,
  BRACE_START: BRACE_START$1,
  STAR
} = constants;

const THROTTLE_MODE_WATCH = 'watch';

const open = promisify$2(fs$2.open);
const stat$2 = promisify$2(fs$2.stat);
const lstat$1 = promisify$2(fs$2.lstat);
const close = promisify$2(fs$2.close);
const fsrealpath = promisify$2(fs$2.realpath);

const statMethods$1 = { lstat: lstat$1, stat: stat$2 };

// TODO: emit errors properly. Example: EMFILE on Macos.
const foreach = (val, fn) => {
  if (val instanceof Set) {
    val.forEach(fn);
  } else {
    fn(val);
  }
};

const addAndConvert = (main, prop, item) => {
  let container = main[prop];
  if (!(container instanceof Set)) {
    main[prop] = container = new Set([container]);
  }
  container.add(item);
};

const clearItem = cont => key => {
  const set = cont[key];
  if (set instanceof Set) {
    set.clear();
  } else {
    delete cont[key];
  }
};

const delFromSet = (main, prop, item) => {
  const container = main[prop];
  if (container instanceof Set) {
    container.delete(item);
  } else if (container === item) {
    delete main[prop];
  }
};

const isEmptySet = (val) => val instanceof Set ? val.size === 0 : !val;

/**
 * @typedef {String} Path
 */

// fs_watch helpers

// object to hold per-process fs_watch instances
// (may be shared across chokidar FSWatcher instances)

/**
 * @typedef {Object} FsWatchContainer
 * @property {Set} listeners
 * @property {Set} errHandlers
 * @property {Set} rawEmitters
 * @property {fs.FSWatcher=} watcher
 * @property {Boolean=} watcherUnusable
 */

/**
 * @type {Map<String,FsWatchContainer>}
 */
const FsWatchInstances = new Map();

/**
 * Instantiates the fs_watch interface
 * @param {String} path to be watched
 * @param {Object} options to be passed to fs_watch
 * @param {Function} listener main event handler
 * @param {Function} errHandler emits info about errors
 * @param {Function} emitRaw emits raw event data
 * @returns {fs.FSWatcher} new fsevents instance
 */
function createFsWatchInstance(path, options, listener, errHandler, emitRaw) {
  const handleEvent = (rawEvent, evPath) => {
    listener(path);
    emitRaw(rawEvent, evPath, {watchedPath: path});

    // emit based on events occurring for files from a directory's watcher in
    // case the file's watcher misses it (and rely on throttling to de-dupe)
    if (evPath && path !== evPath) {
      fsWatchBroadcast(
        sysPath$2.resolve(path, evPath), KEY_LISTENERS, sysPath$2.join(path, evPath)
      );
    }
  };
  try {
    return fs$2.watch(path, options, handleEvent);
  } catch (error) {
    errHandler(error);
  }
}

/**
 * Helper for passing fs_watch event data to a collection of listeners
 * @param {Path} fullPath absolute path bound to fs_watch instance
 * @param {String} type listener type
 * @param {*=} val1 arguments to be passed to listeners
 * @param {*=} val2
 * @param {*=} val3
 */
const fsWatchBroadcast = (fullPath, type, val1, val2, val3) => {
  const cont = FsWatchInstances.get(fullPath);
  if (!cont) return;
  foreach(cont[type], (listener) => {
    listener(val1, val2, val3);
  });
};

/**
 * Instantiates the fs_watch interface or binds listeners
 * to an existing one covering the same file system entry
 * @param {String} path
 * @param {String} fullPath absolute path
 * @param {Object} options to be passed to fs_watch
 * @param {Object} handlers container for event listener functions
 */
const setFsWatchListener = (path, fullPath, options, handlers) => {
  const {listener, errHandler, rawEmitter} = handlers;
  let cont = FsWatchInstances.get(fullPath);

  /** @type {fs.FSWatcher=} */
  let watcher;
  if (!options.persistent) {
    watcher = createFsWatchInstance(
      path, options, listener, errHandler, rawEmitter
    );
    return watcher.close.bind(watcher);
  }
  if (cont) {
    addAndConvert(cont, KEY_LISTENERS, listener);
    addAndConvert(cont, KEY_ERR, errHandler);
    addAndConvert(cont, KEY_RAW, rawEmitter);
  } else {
    watcher = createFsWatchInstance(
      path,
      options,
      fsWatchBroadcast.bind(null, fullPath, KEY_LISTENERS),
      errHandler, // no need to use broadcast here
      fsWatchBroadcast.bind(null, fullPath, KEY_RAW)
    );
    if (!watcher) return;
    watcher.on(EV_ERROR$2, async (error) => {
      const broadcastErr = fsWatchBroadcast.bind(null, fullPath, KEY_ERR);
      cont.watcherUnusable = true; // documented since Node 10.4.1
      // Workaround for https://github.com/joyent/node/issues/4337
      if (isWindows$1 && error.code === 'EPERM') {
        try {
          const fd = await open(path, 'r');
          await close(fd);
          broadcastErr(error);
        } catch (err) {}
      } else {
        broadcastErr(error);
      }
    });
    cont = {
      listeners: listener,
      errHandlers: errHandler,
      rawEmitters: rawEmitter,
      watcher
    };
    FsWatchInstances.set(fullPath, cont);
  }
  // const index = cont.listeners.indexOf(listener);

  // removes this instance's listeners and closes the underlying fs_watch
  // instance if there are no more listeners left
  return () => {
    delFromSet(cont, KEY_LISTENERS, listener);
    delFromSet(cont, KEY_ERR, errHandler);
    delFromSet(cont, KEY_RAW, rawEmitter);
    if (isEmptySet(cont.listeners)) {
      // Check to protect against issue gh-730.
      // if (cont.watcherUnusable) {
      cont.watcher.close();
      // }
      FsWatchInstances.delete(fullPath);
      HANDLER_KEYS.forEach(clearItem(cont));
      cont.watcher = undefined;
      Object.freeze(cont);
    }
  };
};

// fs_watchFile helpers

// object to hold per-process fs_watchFile instances
// (may be shared across chokidar FSWatcher instances)
const FsWatchFileInstances = new Map();

/**
 * Instantiates the fs_watchFile interface or binds listeners
 * to an existing one covering the same file system entry
 * @param {String} path to be watched
 * @param {String} fullPath absolute path
 * @param {Object} options options to be passed to fs_watchFile
 * @param {Object} handlers container for event listener functions
 * @returns {Function} closer
 */
const setFsWatchFileListener = (path, fullPath, options, handlers) => {
  const {listener, rawEmitter} = handlers;
  let cont = FsWatchFileInstances.get(fullPath);

  const copts = cont && cont.options;
  if (copts && (copts.persistent < options.persistent || copts.interval > options.interval)) {
    fs$2.unwatchFile(fullPath);
    cont = undefined;
  }

  /* eslint-enable no-unused-vars, prefer-destructuring */

  if (cont) {
    addAndConvert(cont, KEY_LISTENERS, listener);
    addAndConvert(cont, KEY_RAW, rawEmitter);
  } else {
    // TODO
    // listeners.add(listener);
    // rawEmitters.add(rawEmitter);
    cont = {
      listeners: listener,
      rawEmitters: rawEmitter,
      options,
      watcher: fs$2.watchFile(fullPath, options, (curr, prev) => {
        foreach(cont.rawEmitters, (rawEmitter) => {
          rawEmitter(EV_CHANGE$2, fullPath, {curr, prev});
        });
        const currmtime = curr.mtimeMs;
        if (curr.size !== prev.size || currmtime > prev.mtimeMs || currmtime === 0) {
          foreach(cont.listeners, (listener) => listener(path, curr));
        }
      })
    };
    FsWatchFileInstances.set(fullPath, cont);
  }
  // const index = cont.listeners.indexOf(listener);

  // Removes this instance's listeners and closes the underlying fs_watchFile
  // instance if there are no more listeners left.
  return () => {
    delFromSet(cont, KEY_LISTENERS, listener);
    delFromSet(cont, KEY_RAW, rawEmitter);
    if (isEmptySet(cont.listeners)) {
      FsWatchFileInstances.delete(fullPath);
      fs$2.unwatchFile(fullPath);
      cont.options = cont.watcher = undefined;
      Object.freeze(cont);
    }
  };
};

/**
 * @mixin
 */
let NodeFsHandler$1 = class NodeFsHandler {

/**
 * @param {import("../index").FSWatcher} fsW
 */
constructor(fsW) {
  this.fsw = fsW;
  this._boundHandleError = (error) => fsW._handleError(error);
}

/**
 * Watch file for changes with fs_watchFile or fs_watch.
 * @param {String} path to file or dir
 * @param {Function} listener on fs change
 * @returns {Function} closer for the watcher instance
 */
_watchWithNodeFs(path, listener) {
  const opts = this.fsw.options;
  const directory = sysPath$2.dirname(path);
  const basename = sysPath$2.basename(path);
  const parent = this.fsw._getWatchedDir(directory);
  parent.add(basename);
  const absolutePath = sysPath$2.resolve(path);
  const options = {persistent: opts.persistent};
  if (!listener) listener = EMPTY_FN$2;

  let closer;
  if (opts.usePolling) {
    options.interval = opts.enableBinaryInterval && isBinaryPath(basename) ?
      opts.binaryInterval : opts.interval;
    closer = setFsWatchFileListener(path, absolutePath, options, {
      listener,
      rawEmitter: this.fsw._emitRaw
    });
  } else {
    closer = setFsWatchListener(path, absolutePath, options, {
      listener,
      errHandler: this._boundHandleError,
      rawEmitter: this.fsw._emitRaw
    });
  }
  return closer;
}

/**
 * Watch a file and emit add event if warranted.
 * @param {Path} file Path
 * @param {fs.Stats} stats result of fs_stat
 * @param {Boolean} initialAdd was the file added at watch instantiation?
 * @returns {Function} closer for the watcher instance
 */
_handleFile(file, stats, initialAdd) {
  if (this.fsw.closed) {
    return;
  }
  const dirname = sysPath$2.dirname(file);
  const basename = sysPath$2.basename(file);
  const parent = this.fsw._getWatchedDir(dirname);
  // stats is always present
  let prevStats = stats;

  // if the file is already being watched, do nothing
  if (parent.has(basename)) return;

  const listener = async (path, newStats) => {
    if (!this.fsw._throttle(THROTTLE_MODE_WATCH, file, 5)) return;
    if (!newStats || newStats.mtimeMs === 0) {
      try {
        const newStats = await stat$2(file);
        if (this.fsw.closed) return;
        // Check that change event was not fired because of changed only accessTime.
        const at = newStats.atimeMs;
        const mt = newStats.mtimeMs;
        if (!at || at <= mt || mt !== prevStats.mtimeMs) {
          this.fsw._emit(EV_CHANGE$2, file, newStats);
        }
        if (isLinux && prevStats.ino !== newStats.ino) {
          this.fsw._closeFile(path);
          prevStats = newStats;
          this.fsw._addPathCloser(path, this._watchWithNodeFs(file, listener));
        } else {
          prevStats = newStats;
        }
      } catch (error) {
        // Fix issues where mtime is null but file is still present
        this.fsw._remove(dirname, basename);
      }
      // add is about to be emitted if file not already tracked in parent
    } else if (parent.has(basename)) {
      // Check that change event was not fired because of changed only accessTime.
      const at = newStats.atimeMs;
      const mt = newStats.mtimeMs;
      if (!at || at <= mt || mt !== prevStats.mtimeMs) {
        this.fsw._emit(EV_CHANGE$2, file, newStats);
      }
      prevStats = newStats;
    }
  };
  // kick off the watcher
  const closer = this._watchWithNodeFs(file, listener);

  // emit an add event if we're supposed to
  if (!(initialAdd && this.fsw.options.ignoreInitial) && this.fsw._isntIgnored(file)) {
    if (!this.fsw._throttle(EV_ADD$2, file, 0)) return;
    this.fsw._emit(EV_ADD$2, file, stats);
  }

  return closer;
}

/**
 * Handle symlinks encountered while reading a dir.
 * @param {Object} entry returned by readdirp
 * @param {String} directory path of dir being read
 * @param {String} path of this item
 * @param {String} item basename of this item
 * @returns {Promise<Boolean>} true if no more processing is needed for this entry.
 */
async _handleSymlink(entry, directory, path, item) {
  if (this.fsw.closed) {
    return;
  }
  const full = entry.fullPath;
  const dir = this.fsw._getWatchedDir(directory);

  if (!this.fsw.options.followSymlinks) {
    // watch symlink directly (don't follow) and detect changes
    this.fsw._incrReadyCount();

    let linkPath;
    try {
      linkPath = await fsrealpath(path);
    } catch (e) {
      this.fsw._emitReady();
      return true;
    }

    if (this.fsw.closed) return;
    if (dir.has(item)) {
      if (this.fsw._symlinkPaths.get(full) !== linkPath) {
        this.fsw._symlinkPaths.set(full, linkPath);
        this.fsw._emit(EV_CHANGE$2, path, entry.stats);
      }
    } else {
      dir.add(item);
      this.fsw._symlinkPaths.set(full, linkPath);
      this.fsw._emit(EV_ADD$2, path, entry.stats);
    }
    this.fsw._emitReady();
    return true;
  }

  // don't follow the same symlink more than once
  if (this.fsw._symlinkPaths.has(full)) {
    return true;
  }

  this.fsw._symlinkPaths.set(full, true);
}

_handleRead(directory, initialAdd, wh, target, dir, depth, throttler) {
  // Normalize the directory name on Windows
  directory = sysPath$2.join(directory, EMPTY_STR$1);

  if (!wh.hasGlob) {
    throttler = this.fsw._throttle('readdir', directory, 1000);
    if (!throttler) return;
  }

  const previous = this.fsw._getWatchedDir(wh.path);
  const current = new Set();

  let stream = this.fsw._readdirp(directory, {
    fileFilter: entry => wh.filterPath(entry),
    directoryFilter: entry => wh.filterDir(entry),
    depth: 0
  }).on(STR_DATA$1, async (entry) => {
    if (this.fsw.closed) {
      stream = undefined;
      return;
    }
    const item = entry.path;
    let path = sysPath$2.join(directory, item);
    current.add(item);

    if (entry.stats.isSymbolicLink() && await this._handleSymlink(entry, directory, path, item)) {
      return;
    }

    if (this.fsw.closed) {
      stream = undefined;
      return;
    }
    // Files that present in current directory snapshot
    // but absent in previous are added to watch list and
    // emit `add` event.
    if (item === target || !target && !previous.has(item)) {
      this.fsw._incrReadyCount();

      // ensure relativeness of path is preserved in case of watcher reuse
      path = sysPath$2.join(dir, sysPath$2.relative(dir, path));

      this._addToNodeFs(path, initialAdd, wh, depth + 1);
    }
  }).on(EV_ERROR$2, this._boundHandleError);

  return new Promise(resolve =>
    stream.once(STR_END$2, () => {
      if (this.fsw.closed) {
        stream = undefined;
        return;
      }
      const wasThrottled = throttler ? throttler.clear() : false;

      resolve();

      // Files that absent in current directory snapshot
      // but present in previous emit `remove` event
      // and are removed from @watched[directory].
      previous.getChildren().filter((item) => {
        return item !== directory &&
          !current.has(item) &&
          // in case of intersecting globs;
          // a path may have been filtered out of this readdir, but
          // shouldn't be removed because it matches a different glob
          (!wh.hasGlob || wh.filterPath({
            fullPath: sysPath$2.resolve(directory, item)
          }));
      }).forEach((item) => {
        this.fsw._remove(directory, item);
      });

      stream = undefined;

      // one more time for any missed in case changes came in extremely quickly
      if (wasThrottled) this._handleRead(directory, false, wh, target, dir, depth, throttler);
    })
  );
}

/**
 * Read directory to add / remove files from `@watched` list and re-read it on change.
 * @param {String} dir fs path
 * @param {fs.Stats} stats
 * @param {Boolean} initialAdd
 * @param {Number} depth relative to user-supplied path
 * @param {String} target child path targeted for watch
 * @param {Object} wh Common watch helpers for this path
 * @param {String} realpath
 * @returns {Promise<Function>} closer for the watcher instance.
 */
async _handleDir(dir, stats, initialAdd, depth, target, wh, realpath) {
  const parentDir = this.fsw._getWatchedDir(sysPath$2.dirname(dir));
  const tracked = parentDir.has(sysPath$2.basename(dir));
  if (!(initialAdd && this.fsw.options.ignoreInitial) && !target && !tracked) {
    if (!wh.hasGlob || wh.globFilter(dir)) this.fsw._emit(EV_ADD_DIR$2, dir, stats);
  }

  // ensure dir is tracked (harmless if redundant)
  parentDir.add(sysPath$2.basename(dir));
  this.fsw._getWatchedDir(dir);
  let throttler;
  let closer;

  const oDepth = this.fsw.options.depth;
  if ((oDepth == null || depth <= oDepth) && !this.fsw._symlinkPaths.has(realpath)) {
    if (!target) {
      await this._handleRead(dir, initialAdd, wh, target, dir, depth, throttler);
      if (this.fsw.closed) return;
    }

    closer = this._watchWithNodeFs(dir, (dirPath, stats) => {
      // if current directory is removed, do nothing
      if (stats && stats.mtimeMs === 0) return;

      this._handleRead(dirPath, false, wh, target, dir, depth, throttler);
    });
  }
  return closer;
}

/**
 * Handle added file, directory, or glob pattern.
 * Delegates call to _handleFile / _handleDir after checks.
 * @param {String} path to file or ir
 * @param {Boolean} initialAdd was the file added at watch instantiation?
 * @param {Object} priorWh depth relative to user-supplied path
 * @param {Number} depth Child path actually targeted for watch
 * @param {String=} target Child path actually targeted for watch
 * @returns {Promise}
 */
async _addToNodeFs(path, initialAdd, priorWh, depth, target) {
  const ready = this.fsw._emitReady;
  if (this.fsw._isIgnored(path) || this.fsw.closed) {
    ready();
    return false;
  }

  const wh = this.fsw._getWatchHelpers(path, depth);
  if (!wh.hasGlob && priorWh) {
    wh.hasGlob = priorWh.hasGlob;
    wh.globFilter = priorWh.globFilter;
    wh.filterPath = entry => priorWh.filterPath(entry);
    wh.filterDir = entry => priorWh.filterDir(entry);
  }

  // evaluate what is at the path we're being asked to watch
  try {
    const stats = await statMethods$1[wh.statMethod](wh.watchPath);
    if (this.fsw.closed) return;
    if (this.fsw._isIgnored(wh.watchPath, stats)) {
      ready();
      return false;
    }

    const follow = this.fsw.options.followSymlinks && !path.includes(STAR) && !path.includes(BRACE_START$1);
    let closer;
    if (stats.isDirectory()) {
      const absPath = sysPath$2.resolve(path);
      const targetPath = follow ? await fsrealpath(path) : path;
      if (this.fsw.closed) return;
      closer = await this._handleDir(wh.watchPath, stats, initialAdd, depth, target, wh, targetPath);
      if (this.fsw.closed) return;
      // preserve this symlink's target path
      if (absPath !== targetPath && targetPath !== undefined) {
        this.fsw._symlinkPaths.set(absPath, targetPath);
      }
    } else if (stats.isSymbolicLink()) {
      const targetPath = follow ? await fsrealpath(path) : path;
      if (this.fsw.closed) return;
      const parent = sysPath$2.dirname(wh.watchPath);
      this.fsw._getWatchedDir(parent).add(wh.watchPath);
      this.fsw._emit(EV_ADD$2, wh.watchPath, stats);
      closer = await this._handleDir(parent, stats, initialAdd, depth, path, wh, targetPath);
      if (this.fsw.closed) return;

      // preserve this symlink's target path
      if (targetPath !== undefined) {
        this.fsw._symlinkPaths.set(sysPath$2.resolve(path), targetPath);
      }
    } else {
      closer = this._handleFile(wh.watchPath, stats, initialAdd);
    }
    ready();

    this.fsw._addPathCloser(path, closer);
    return false;

  } catch (error) {
    if (this.fsw._handleError(error)) {
      ready();
      return path;
    }
  }
}

};

var nodefsHandler = NodeFsHandler$1;

var fseventsHandlerExports = {};
var fseventsHandler = {
  get exports(){ return fseventsHandlerExports; },
  set exports(v){ fseventsHandlerExports = v; },
};

const require$$3 = /*@__PURE__*/rollup.getAugmentedNamespace(fseventsImporter.fseventsImporter);

const fs$1 = require$$0$1;
const sysPath$1 = require$$0$2;
const { promisify: promisify$1 } = require$$2;

let fsevents;
try {
  fsevents = require$$3.getFsEvents();
} catch (error) {
  if (process.env.CHOKIDAR_PRINT_FSEVENTS_REQUIRE_ERROR) console.error(error);
}

if (fsevents) {
  // TODO: real check
  const mtch = process.version.match(/v(\d+)\.(\d+)/);
  if (mtch && mtch[1] && mtch[2]) {
    const maj = Number.parseInt(mtch[1], 10);
    const min = Number.parseInt(mtch[2], 10);
    if (maj === 8 && min < 16) {
      fsevents = undefined;
    }
  }
}

const {
  EV_ADD: EV_ADD$1,
  EV_CHANGE: EV_CHANGE$1,
  EV_ADD_DIR: EV_ADD_DIR$1,
  EV_UNLINK: EV_UNLINK$1,
  EV_ERROR: EV_ERROR$1,
  STR_DATA,
  STR_END: STR_END$1,
  FSEVENT_CREATED,
  FSEVENT_MODIFIED,
  FSEVENT_DELETED,
  FSEVENT_MOVED,
  // FSEVENT_CLONED,
  FSEVENT_UNKNOWN,
  FSEVENT_TYPE_FILE,
  FSEVENT_TYPE_DIRECTORY,
  FSEVENT_TYPE_SYMLINK,

  ROOT_GLOBSTAR,
  DIR_SUFFIX,
  DOT_SLASH,
  FUNCTION_TYPE: FUNCTION_TYPE$1,
  EMPTY_FN: EMPTY_FN$1,
  IDENTITY_FN
} = constants;

const Depth = (value) => isNaN(value) ? {} : {depth: value};

const stat$1 = promisify$1(fs$1.stat);
const lstat = promisify$1(fs$1.lstat);
const realpath = promisify$1(fs$1.realpath);

const statMethods = { stat: stat$1, lstat };

/**
 * @typedef {String} Path
 */

/**
 * @typedef {Object} FsEventsWatchContainer
 * @property {Set<Function>} listeners
 * @property {Function} rawEmitter
 * @property {{stop: Function}} watcher
 */

// fsevents instance helper functions
/**
 * Object to hold per-process fsevents instances (may be shared across chokidar FSWatcher instances)
 * @type {Map<Path,FsEventsWatchContainer>}
 */
const FSEventsWatchers = new Map();

// Threshold of duplicate path prefixes at which to start
// consolidating going forward
const consolidateThreshhold = 10;

const wrongEventFlags = new Set([
  69888, 70400, 71424, 72704, 73472, 131328, 131840, 262912
]);

/**
 * Instantiates the fsevents interface
 * @param {Path} path path to be watched
 * @param {Function} callback called when fsevents is bound and ready
 * @returns {{stop: Function}} new fsevents instance
 */
const createFSEventsInstance = (path, callback) => {
  const stop = fsevents.watch(path, callback);
  return {stop};
};

/**
 * Instantiates the fsevents interface or binds listeners to an existing one covering
 * the same file tree.
 * @param {Path} path           - to be watched
 * @param {Path} realPath       - real path for symlinks
 * @param {Function} listener   - called when fsevents emits events
 * @param {Function} rawEmitter - passes data to listeners of the 'raw' event
 * @returns {Function} closer
 */
function setFSEventsListener(path, realPath, listener, rawEmitter) {
  let watchPath = sysPath$1.extname(realPath) ? sysPath$1.dirname(realPath) : realPath;

  const parentPath = sysPath$1.dirname(watchPath);
  let cont = FSEventsWatchers.get(watchPath);

  // If we've accumulated a substantial number of paths that
  // could have been consolidated by watching one directory
  // above the current one, create a watcher on the parent
  // path instead, so that we do consolidate going forward.
  if (couldConsolidate(parentPath)) {
    watchPath = parentPath;
  }

  const resolvedPath = sysPath$1.resolve(path);
  const hasSymlink = resolvedPath !== realPath;

  const filteredListener = (fullPath, flags, info) => {
    if (hasSymlink) fullPath = fullPath.replace(realPath, resolvedPath);
    if (
      fullPath === resolvedPath ||
      !fullPath.indexOf(resolvedPath + sysPath$1.sep)
    ) listener(fullPath, flags, info);
  };

  // check if there is already a watcher on a parent path
  // modifies `watchPath` to the parent path when it finds a match
  let watchedParent = false;
  for (const watchedPath of FSEventsWatchers.keys()) {
    if (realPath.indexOf(sysPath$1.resolve(watchedPath) + sysPath$1.sep) === 0) {
      watchPath = watchedPath;
      cont = FSEventsWatchers.get(watchPath);
      watchedParent = true;
      break;
    }
  }

  if (cont || watchedParent) {
    cont.listeners.add(filteredListener);
  } else {
    cont = {
      listeners: new Set([filteredListener]),
      rawEmitter,
      watcher: createFSEventsInstance(watchPath, (fullPath, flags) => {
        if (!cont.listeners.size) return;
        const info = fsevents.getInfo(fullPath, flags);
        cont.listeners.forEach(list => {
          list(fullPath, flags, info);
        });

        cont.rawEmitter(info.event, fullPath, info);
      })
    };
    FSEventsWatchers.set(watchPath, cont);
  }

  // removes this instance's listeners and closes the underlying fsevents
  // instance if there are no more listeners left
  return () => {
    const lst = cont.listeners;

    lst.delete(filteredListener);
    if (!lst.size) {
      FSEventsWatchers.delete(watchPath);
      if (cont.watcher) return cont.watcher.stop().then(() => {
        cont.rawEmitter = cont.watcher = undefined;
        Object.freeze(cont);
      });
    }
  };
}

// Decide whether or not we should start a new higher-level
// parent watcher
const couldConsolidate = (path) => {
  let count = 0;
  for (const watchPath of FSEventsWatchers.keys()) {
    if (watchPath.indexOf(path) === 0) {
      count++;
      if (count >= consolidateThreshhold) {
        return true;
      }
    }
  }

  return false;
};

// returns boolean indicating whether fsevents can be used
const canUse = () => fsevents && FSEventsWatchers.size < 128;

// determines subdirectory traversal levels from root to path
const calcDepth = (path, root) => {
  let i = 0;
  while (!path.indexOf(root) && (path = sysPath$1.dirname(path)) !== root) i++;
  return i;
};

// returns boolean indicating whether the fsevents' event info has the same type
// as the one returned by fs.stat
const sameTypes = (info, stats) => (
  info.type === FSEVENT_TYPE_DIRECTORY && stats.isDirectory() ||
  info.type === FSEVENT_TYPE_SYMLINK && stats.isSymbolicLink() ||
  info.type === FSEVENT_TYPE_FILE && stats.isFile()
);

/**
 * @mixin
 */
let FsEventsHandler$1 = class FsEventsHandler {

/**
 * @param {import('../index').FSWatcher} fsw
 */
constructor(fsw) {
  this.fsw = fsw;
}
checkIgnored(path, stats) {
  const ipaths = this.fsw._ignoredPaths;
  if (this.fsw._isIgnored(path, stats)) {
    ipaths.add(path);
    if (stats && stats.isDirectory()) {
      ipaths.add(path + ROOT_GLOBSTAR);
    }
    return true;
  }

  ipaths.delete(path);
  ipaths.delete(path + ROOT_GLOBSTAR);
}

addOrChange(path, fullPath, realPath, parent, watchedDir, item, info, opts) {
  const event = watchedDir.has(item) ? EV_CHANGE$1 : EV_ADD$1;
  this.handleEvent(event, path, fullPath, realPath, parent, watchedDir, item, info, opts);
}

async checkExists(path, fullPath, realPath, parent, watchedDir, item, info, opts) {
  try {
    const stats = await stat$1(path);
    if (this.fsw.closed) return;
    if (sameTypes(info, stats)) {
      this.addOrChange(path, fullPath, realPath, parent, watchedDir, item, info, opts);
    } else {
      this.handleEvent(EV_UNLINK$1, path, fullPath, realPath, parent, watchedDir, item, info, opts);
    }
  } catch (error) {
    if (error.code === 'EACCES') {
      this.addOrChange(path, fullPath, realPath, parent, watchedDir, item, info, opts);
    } else {
      this.handleEvent(EV_UNLINK$1, path, fullPath, realPath, parent, watchedDir, item, info, opts);
    }
  }
}

handleEvent(event, path, fullPath, realPath, parent, watchedDir, item, info, opts) {
  if (this.fsw.closed || this.checkIgnored(path)) return;

  if (event === EV_UNLINK$1) {
    const isDirectory = info.type === FSEVENT_TYPE_DIRECTORY;
    // suppress unlink events on never before seen files
    if (isDirectory || watchedDir.has(item)) {
      this.fsw._remove(parent, item, isDirectory);
    }
  } else {
    if (event === EV_ADD$1) {
      // track new directories
      if (info.type === FSEVENT_TYPE_DIRECTORY) this.fsw._getWatchedDir(path);

      if (info.type === FSEVENT_TYPE_SYMLINK && opts.followSymlinks) {
        // push symlinks back to the top of the stack to get handled
        const curDepth = opts.depth === undefined ?
          undefined : calcDepth(fullPath, realPath) + 1;
        return this._addToFsEvents(path, false, true, curDepth);
      }

      // track new paths
      // (other than symlinks being followed, which will be tracked soon)
      this.fsw._getWatchedDir(parent).add(item);
    }
    /**
     * @type {'add'|'addDir'|'unlink'|'unlinkDir'}
     */
    const eventName = info.type === FSEVENT_TYPE_DIRECTORY ? event + DIR_SUFFIX : event;
    this.fsw._emit(eventName, path);
    if (eventName === EV_ADD_DIR$1) this._addToFsEvents(path, false, true);
  }
}

/**
 * Handle symlinks encountered during directory scan
 * @param {String} watchPath  - file/dir path to be watched with fsevents
 * @param {String} realPath   - real path (in case of symlinks)
 * @param {Function} transform  - path transformer
 * @param {Function} globFilter - path filter in case a glob pattern was provided
 * @returns {Function} closer for the watcher instance
*/
_watchWithFsEvents(watchPath, realPath, transform, globFilter) {
  if (this.fsw.closed || this.fsw._isIgnored(watchPath)) return;
  const opts = this.fsw.options;
  const watchCallback = async (fullPath, flags, info) => {
    if (this.fsw.closed) return;
    if (
      opts.depth !== undefined &&
      calcDepth(fullPath, realPath) > opts.depth
    ) return;
    const path = transform(sysPath$1.join(
      watchPath, sysPath$1.relative(watchPath, fullPath)
    ));
    if (globFilter && !globFilter(path)) return;
    // ensure directories are tracked
    const parent = sysPath$1.dirname(path);
    const item = sysPath$1.basename(path);
    const watchedDir = this.fsw._getWatchedDir(
      info.type === FSEVENT_TYPE_DIRECTORY ? path : parent
    );

    // correct for wrong events emitted
    if (wrongEventFlags.has(flags) || info.event === FSEVENT_UNKNOWN) {
      if (typeof opts.ignored === FUNCTION_TYPE$1) {
        let stats;
        try {
          stats = await stat$1(path);
        } catch (error) {}
        if (this.fsw.closed) return;
        if (this.checkIgnored(path, stats)) return;
        if (sameTypes(info, stats)) {
          this.addOrChange(path, fullPath, realPath, parent, watchedDir, item, info, opts);
        } else {
          this.handleEvent(EV_UNLINK$1, path, fullPath, realPath, parent, watchedDir, item, info, opts);
        }
      } else {
        this.checkExists(path, fullPath, realPath, parent, watchedDir, item, info, opts);
      }
    } else {
      switch (info.event) {
      case FSEVENT_CREATED:
      case FSEVENT_MODIFIED:
        return this.addOrChange(path, fullPath, realPath, parent, watchedDir, item, info, opts);
      case FSEVENT_DELETED:
      case FSEVENT_MOVED:
        return this.checkExists(path, fullPath, realPath, parent, watchedDir, item, info, opts);
      }
    }
  };

  const closer = setFSEventsListener(
    watchPath,
    realPath,
    watchCallback,
    this.fsw._emitRaw
  );

  this.fsw._emitReady();
  return closer;
}

/**
 * Handle symlinks encountered during directory scan
 * @param {String} linkPath path to symlink
 * @param {String} fullPath absolute path to the symlink
 * @param {Function} transform pre-existing path transformer
 * @param {Number} curDepth level of subdirectories traversed to where symlink is
 * @returns {Promise<void>}
 */
async _handleFsEventsSymlink(linkPath, fullPath, transform, curDepth) {
  // don't follow the same symlink more than once
  if (this.fsw.closed || this.fsw._symlinkPaths.has(fullPath)) return;

  this.fsw._symlinkPaths.set(fullPath, true);
  this.fsw._incrReadyCount();

  try {
    const linkTarget = await realpath(linkPath);
    if (this.fsw.closed) return;
    if (this.fsw._isIgnored(linkTarget)) {
      return this.fsw._emitReady();
    }

    this.fsw._incrReadyCount();

    // add the linkTarget for watching with a wrapper for transform
    // that causes emitted paths to incorporate the link's path
    this._addToFsEvents(linkTarget || linkPath, (path) => {
      let aliasedPath = linkPath;
      if (linkTarget && linkTarget !== DOT_SLASH) {
        aliasedPath = path.replace(linkTarget, linkPath);
      } else if (path !== DOT_SLASH) {
        aliasedPath = sysPath$1.join(linkPath, path);
      }
      return transform(aliasedPath);
    }, false, curDepth);
  } catch(error) {
    if (this.fsw._handleError(error)) {
      return this.fsw._emitReady();
    }
  }
}

/**
 *
 * @param {Path} newPath
 * @param {fs.Stats} stats
 */
emitAdd(newPath, stats, processPath, opts, forceAdd) {
  const pp = processPath(newPath);
  const isDir = stats.isDirectory();
  const dirObj = this.fsw._getWatchedDir(sysPath$1.dirname(pp));
  const base = sysPath$1.basename(pp);

  // ensure empty dirs get tracked
  if (isDir) this.fsw._getWatchedDir(pp);
  if (dirObj.has(base)) return;
  dirObj.add(base);

  if (!opts.ignoreInitial || forceAdd === true) {
    this.fsw._emit(isDir ? EV_ADD_DIR$1 : EV_ADD$1, pp, stats);
  }
}

initWatch(realPath, path, wh, processPath) {
  if (this.fsw.closed) return;
  const closer = this._watchWithFsEvents(
    wh.watchPath,
    sysPath$1.resolve(realPath || wh.watchPath),
    processPath,
    wh.globFilter
  );
  this.fsw._addPathCloser(path, closer);
}

/**
 * Handle added path with fsevents
 * @param {String} path file/dir path or glob pattern
 * @param {Function|Boolean=} transform converts working path to what the user expects
 * @param {Boolean=} forceAdd ensure add is emitted
 * @param {Number=} priorDepth Level of subdirectories already traversed.
 * @returns {Promise<void>}
 */
async _addToFsEvents(path, transform, forceAdd, priorDepth) {
  if (this.fsw.closed) {
    return;
  }
  const opts = this.fsw.options;
  const processPath = typeof transform === FUNCTION_TYPE$1 ? transform : IDENTITY_FN;

  const wh = this.fsw._getWatchHelpers(path);

  // evaluate what is at the path we're being asked to watch
  try {
    const stats = await statMethods[wh.statMethod](wh.watchPath);
    if (this.fsw.closed) return;
    if (this.fsw._isIgnored(wh.watchPath, stats)) {
      throw null;
    }
    if (stats.isDirectory()) {
      // emit addDir unless this is a glob parent
      if (!wh.globFilter) this.emitAdd(processPath(path), stats, processPath, opts, forceAdd);

      // don't recurse further if it would exceed depth setting
      if (priorDepth && priorDepth > opts.depth) return;

      // scan the contents of the dir
      this.fsw._readdirp(wh.watchPath, {
        fileFilter: entry => wh.filterPath(entry),
        directoryFilter: entry => wh.filterDir(entry),
        ...Depth(opts.depth - (priorDepth || 0))
      }).on(STR_DATA, (entry) => {
        // need to check filterPath on dirs b/c filterDir is less restrictive
        if (this.fsw.closed) {
          return;
        }
        if (entry.stats.isDirectory() && !wh.filterPath(entry)) return;

        const joinedPath = sysPath$1.join(wh.watchPath, entry.path);
        const {fullPath} = entry;

        if (wh.followSymlinks && entry.stats.isSymbolicLink()) {
          // preserve the current depth here since it can't be derived from
          // real paths past the symlink
          const curDepth = opts.depth === undefined ?
            undefined : calcDepth(joinedPath, sysPath$1.resolve(wh.watchPath)) + 1;

          this._handleFsEventsSymlink(joinedPath, fullPath, processPath, curDepth);
        } else {
          this.emitAdd(joinedPath, entry.stats, processPath, opts, forceAdd);
        }
      }).on(EV_ERROR$1, EMPTY_FN$1).on(STR_END$1, () => {
        this.fsw._emitReady();
      });
    } else {
      this.emitAdd(wh.watchPath, stats, processPath, opts, forceAdd);
      this.fsw._emitReady();
    }
  } catch (error) {
    if (!error || this.fsw._handleError(error)) {
      // TODO: Strange thing: "should not choke on an ignored watch path" will be failed without 2 ready calls -__-
      this.fsw._emitReady();
      this.fsw._emitReady();
    }
  }

  if (opts.persistent && forceAdd !== true) {
    if (typeof transform === FUNCTION_TYPE$1) {
      // realpath has already been resolved
      this.initWatch(undefined, path, wh, processPath);
    } else {
      let realPath;
      try {
        realPath = await realpath(wh.watchPath);
      } catch (e) {}
      this.initWatch(realPath, path, wh, processPath);
    }
  }
}

};

fseventsHandler.exports = FsEventsHandler$1;
fseventsHandlerExports.canUse = canUse;

const { EventEmitter } = require$$0$3;
const fs = require$$0$1;
const sysPath = require$$0$2;
const { promisify } = require$$2;
const readdirp = readdirp_1;
const anymatch = anymatchExports.default;
const globParent = globParent$1;
const isGlob = isGlob$2;
const braces = braces_1;
const normalizePath = normalizePath$2;

const NodeFsHandler = nodefsHandler;
const FsEventsHandler = fseventsHandlerExports;
const {
  EV_ALL,
  EV_READY,
  EV_ADD,
  EV_CHANGE,
  EV_UNLINK,
  EV_ADD_DIR,
  EV_UNLINK_DIR,
  EV_RAW,
  EV_ERROR,

  STR_CLOSE,
  STR_END,

  BACK_SLASH_RE,
  DOUBLE_SLASH_RE,
  SLASH_OR_BACK_SLASH_RE,
  DOT_RE,
  REPLACER_RE,

  SLASH,
  SLASH_SLASH,
  BRACE_START,
  BANG,
  ONE_DOT,
  TWO_DOTS,
  GLOBSTAR,
  SLASH_GLOBSTAR,
  ANYMATCH_OPTS,
  STRING_TYPE,
  FUNCTION_TYPE,
  EMPTY_STR,
  EMPTY_FN,

  isWindows,
  isMacos,
  isIBMi
} = constants;

const stat = promisify(fs.stat);
const readdir = promisify(fs.readdir);

/**
 * @typedef {String} Path
 * @typedef {'all'|'add'|'addDir'|'change'|'unlink'|'unlinkDir'|'raw'|'error'|'ready'} EventName
 * @typedef {'readdir'|'watch'|'add'|'remove'|'change'} ThrottleType
 */

/**
 *
 * @typedef {Object} WatchHelpers
 * @property {Boolean} followSymlinks
 * @property {'stat'|'lstat'} statMethod
 * @property {Path} path
 * @property {Path} watchPath
 * @property {Function} entryPath
 * @property {Boolean} hasGlob
 * @property {Object} globFilter
 * @property {Function} filterPath
 * @property {Function} filterDir
 */

const arrify = (value = []) => Array.isArray(value) ? value : [value];
const flatten = (list, result = []) => {
  list.forEach(item => {
    if (Array.isArray(item)) {
      flatten(item, result);
    } else {
      result.push(item);
    }
  });
  return result;
};

const unifyPaths = (paths_) => {
  /**
   * @type {Array<String>}
   */
  const paths = flatten(arrify(paths_));
  if (!paths.every(p => typeof p === STRING_TYPE)) {
    throw new TypeError(`Non-string provided as watch path: ${paths}`);
  }
  return paths.map(normalizePathToUnix);
};

// If SLASH_SLASH occurs at the beginning of path, it is not replaced
//     because "//StoragePC/DrivePool/Movies" is a valid network path
const toUnix = (string) => {
  let str = string.replace(BACK_SLASH_RE, SLASH);
  let prepend = false;
  if (str.startsWith(SLASH_SLASH)) {
    prepend = true;
  }
  while (str.match(DOUBLE_SLASH_RE)) {
    str = str.replace(DOUBLE_SLASH_RE, SLASH);
  }
  if (prepend) {
    str = SLASH + str;
  }
  return str;
};

// Our version of upath.normalize
// TODO: this is not equal to path-normalize module - investigate why
const normalizePathToUnix = (path) => toUnix(sysPath.normalize(toUnix(path)));

const normalizeIgnored = (cwd = EMPTY_STR) => (path) => {
  if (typeof path !== STRING_TYPE) return path;
  return normalizePathToUnix(sysPath.isAbsolute(path) ? path : sysPath.join(cwd, path));
};

const getAbsolutePath = (path, cwd) => {
  if (sysPath.isAbsolute(path)) {
    return path;
  }
  if (path.startsWith(BANG)) {
    return BANG + sysPath.join(cwd, path.slice(1));
  }
  return sysPath.join(cwd, path);
};

const undef = (opts, key) => opts[key] === undefined;

/**
 * Directory entry.
 * @property {Path} path
 * @property {Set<Path>} items
 */
class DirEntry {
  /**
   * @param {Path} dir
   * @param {Function} removeWatcher
   */
  constructor(dir, removeWatcher) {
    this.path = dir;
    this._removeWatcher = removeWatcher;
    /** @type {Set<Path>} */
    this.items = new Set();
  }

  add(item) {
    const {items} = this;
    if (!items) return;
    if (item !== ONE_DOT && item !== TWO_DOTS) items.add(item);
  }

  async remove(item) {
    const {items} = this;
    if (!items) return;
    items.delete(item);
    if (items.size > 0) return;

    const dir = this.path;
    try {
      await readdir(dir);
    } catch (err) {
      if (this._removeWatcher) {
        this._removeWatcher(sysPath.dirname(dir), sysPath.basename(dir));
      }
    }
  }

  has(item) {
    const {items} = this;
    if (!items) return;
    return items.has(item);
  }

  /**
   * @returns {Array<String>}
   */
  getChildren() {
    const {items} = this;
    if (!items) return;
    return [...items.values()];
  }

  dispose() {
    this.items.clear();
    delete this.path;
    delete this._removeWatcher;
    delete this.items;
    Object.freeze(this);
  }
}

const STAT_METHOD_F = 'stat';
const STAT_METHOD_L = 'lstat';
class WatchHelper {
  constructor(path, watchPath, follow, fsw) {
    this.fsw = fsw;
    this.path = path = path.replace(REPLACER_RE, EMPTY_STR);
    this.watchPath = watchPath;
    this.fullWatchPath = sysPath.resolve(watchPath);
    this.hasGlob = watchPath !== path;
    /** @type {object|boolean} */
    if (path === EMPTY_STR) this.hasGlob = false;
    this.globSymlink = this.hasGlob && follow ? undefined : false;
    this.globFilter = this.hasGlob ? anymatch(path, undefined, ANYMATCH_OPTS) : false;
    this.dirParts = this.getDirParts(path);
    this.dirParts.forEach((parts) => {
      if (parts.length > 1) parts.pop();
    });
    this.followSymlinks = follow;
    this.statMethod = follow ? STAT_METHOD_F : STAT_METHOD_L;
  }

  checkGlobSymlink(entry) {
    // only need to resolve once
    // first entry should always have entry.parentDir === EMPTY_STR
    if (this.globSymlink === undefined) {
      this.globSymlink = entry.fullParentDir === this.fullWatchPath ?
        false : {realPath: entry.fullParentDir, linkPath: this.fullWatchPath};
    }

    if (this.globSymlink) {
      return entry.fullPath.replace(this.globSymlink.realPath, this.globSymlink.linkPath);
    }

    return entry.fullPath;
  }

  entryPath(entry) {
    return sysPath.join(this.watchPath,
      sysPath.relative(this.watchPath, this.checkGlobSymlink(entry))
    );
  }

  filterPath(entry) {
    const {stats} = entry;
    if (stats && stats.isSymbolicLink()) return this.filterDir(entry);
    const resolvedPath = this.entryPath(entry);
    const matchesGlob = this.hasGlob && typeof this.globFilter === FUNCTION_TYPE ?
      this.globFilter(resolvedPath) : true;
    return matchesGlob &&
      this.fsw._isntIgnored(resolvedPath, stats) &&
      this.fsw._hasReadPermissions(stats);
  }

  getDirParts(path) {
    if (!this.hasGlob) return [];
    const parts = [];
    const expandedPath = path.includes(BRACE_START) ? braces.expand(path) : [path];
    expandedPath.forEach((path) => {
      parts.push(sysPath.relative(this.watchPath, path).split(SLASH_OR_BACK_SLASH_RE));
    });
    return parts;
  }

  filterDir(entry) {
    if (this.hasGlob) {
      const entryParts = this.getDirParts(this.checkGlobSymlink(entry));
      let globstar = false;
      this.unmatchedGlob = !this.dirParts.some((parts) => {
        return parts.every((part, i) => {
          if (part === GLOBSTAR) globstar = true;
          return globstar || !entryParts[0][i] || anymatch(part, entryParts[0][i], ANYMATCH_OPTS);
        });
      });
    }
    return !this.unmatchedGlob && this.fsw._isntIgnored(this.entryPath(entry), entry.stats);
  }
}

/**
 * Watches files & directories for changes. Emitted events:
 * `add`, `addDir`, `change`, `unlink`, `unlinkDir`, `all`, `error`
 *
 *     new FSWatcher()
 *       .add(directories)
 *       .on('add', path => log('File', path, 'was added'))
 */
class FSWatcher extends EventEmitter {
// Not indenting methods for history sake; for now.
constructor(_opts) {
  super();

  const opts = {};
  if (_opts) Object.assign(opts, _opts); // for frozen objects

  /** @type {Map<String, DirEntry>} */
  this._watched = new Map();
  /** @type {Map<String, Array>} */
  this._closers = new Map();
  /** @type {Set<String>} */
  this._ignoredPaths = new Set();

  /** @type {Map<ThrottleType, Map>} */
  this._throttled = new Map();

  /** @type {Map<Path, String|Boolean>} */
  this._symlinkPaths = new Map();

  this._streams = new Set();
  this.closed = false;

  // Set up default options.
  if (undef(opts, 'persistent')) opts.persistent = true;
  if (undef(opts, 'ignoreInitial')) opts.ignoreInitial = false;
  if (undef(opts, 'ignorePermissionErrors')) opts.ignorePermissionErrors = false;
  if (undef(opts, 'interval')) opts.interval = 100;
  if (undef(opts, 'binaryInterval')) opts.binaryInterval = 300;
  if (undef(opts, 'disableGlobbing')) opts.disableGlobbing = false;
  opts.enableBinaryInterval = opts.binaryInterval !== opts.interval;

  // Enable fsevents on OS X when polling isn't explicitly enabled.
  if (undef(opts, 'useFsEvents')) opts.useFsEvents = !opts.usePolling;

  // If we can't use fsevents, ensure the options reflect it's disabled.
  const canUseFsEvents = FsEventsHandler.canUse();
  if (!canUseFsEvents) opts.useFsEvents = false;

  // Use polling on Mac if not using fsevents.
  // Other platforms use non-polling fs_watch.
  if (undef(opts, 'usePolling') && !opts.useFsEvents) {
    opts.usePolling = isMacos;
  }

  // Always default to polling on IBM i because fs.watch() is not available on IBM i.
  if(isIBMi) {
    opts.usePolling = true;
  }

  // Global override (useful for end-developers that need to force polling for all
  // instances of chokidar, regardless of usage/dependency depth)
  const envPoll = process.env.CHOKIDAR_USEPOLLING;
  if (envPoll !== undefined) {
    const envLower = envPoll.toLowerCase();

    if (envLower === 'false' || envLower === '0') {
      opts.usePolling = false;
    } else if (envLower === 'true' || envLower === '1') {
      opts.usePolling = true;
    } else {
      opts.usePolling = !!envLower;
    }
  }
  const envInterval = process.env.CHOKIDAR_INTERVAL;
  if (envInterval) {
    opts.interval = Number.parseInt(envInterval, 10);
  }

  // Editor atomic write normalization enabled by default with fs.watch
  if (undef(opts, 'atomic')) opts.atomic = !opts.usePolling && !opts.useFsEvents;
  if (opts.atomic) this._pendingUnlinks = new Map();

  if (undef(opts, 'followSymlinks')) opts.followSymlinks = true;

  if (undef(opts, 'awaitWriteFinish')) opts.awaitWriteFinish = false;
  if (opts.awaitWriteFinish === true) opts.awaitWriteFinish = {};
  const awf = opts.awaitWriteFinish;
  if (awf) {
    if (!awf.stabilityThreshold) awf.stabilityThreshold = 2000;
    if (!awf.pollInterval) awf.pollInterval = 100;
    this._pendingWrites = new Map();
  }
  if (opts.ignored) opts.ignored = arrify(opts.ignored);

  let readyCalls = 0;
  this._emitReady = () => {
    readyCalls++;
    if (readyCalls >= this._readyCount) {
      this._emitReady = EMPTY_FN;
      this._readyEmitted = true;
      // use process.nextTick to allow time for listener to be bound
      process.nextTick(() => this.emit(EV_READY));
    }
  };
  this._emitRaw = (...args) => this.emit(EV_RAW, ...args);
  this._readyEmitted = false;
  this.options = opts;

  // Initialize with proper watcher.
  if (opts.useFsEvents) {
    this._fsEventsHandler = new FsEventsHandler(this);
  } else {
    this._nodeFsHandler = new NodeFsHandler(this);
  }

  // You’re frozen when your heart’s not open.
  Object.freeze(opts);
}

// Public methods

/**
 * Adds paths to be watched on an existing FSWatcher instance
 * @param {Path|Array<Path>} paths_
 * @param {String=} _origAdd private; for handling non-existent paths to be watched
 * @param {Boolean=} _internal private; indicates a non-user add
 * @returns {FSWatcher} for chaining
 */
add(paths_, _origAdd, _internal) {
  const {cwd, disableGlobbing} = this.options;
  this.closed = false;
  let paths = unifyPaths(paths_);
  if (cwd) {
    paths = paths.map((path) => {
      const absPath = getAbsolutePath(path, cwd);

      // Check `path` instead of `absPath` because the cwd portion can't be a glob
      if (disableGlobbing || !isGlob(path)) {
        return absPath;
      }
      return normalizePath(absPath);
    });
  }

  // set aside negated glob strings
  paths = paths.filter((path) => {
    if (path.startsWith(BANG)) {
      this._ignoredPaths.add(path.slice(1));
      return false;
    }

    // if a path is being added that was previously ignored, stop ignoring it
    this._ignoredPaths.delete(path);
    this._ignoredPaths.delete(path + SLASH_GLOBSTAR);

    // reset the cached userIgnored anymatch fn
    // to make ignoredPaths changes effective
    this._userIgnored = undefined;

    return true;
  });

  if (this.options.useFsEvents && this._fsEventsHandler) {
    if (!this._readyCount) this._readyCount = paths.length;
    if (this.options.persistent) this._readyCount *= 2;
    paths.forEach((path) => this._fsEventsHandler._addToFsEvents(path));
  } else {
    if (!this._readyCount) this._readyCount = 0;
    this._readyCount += paths.length;
    Promise.all(
      paths.map(async path => {
        const res = await this._nodeFsHandler._addToNodeFs(path, !_internal, 0, 0, _origAdd);
        if (res) this._emitReady();
        return res;
      })
    ).then(results => {
      if (this.closed) return;
      results.filter(item => item).forEach(item => {
        this.add(sysPath.dirname(item), sysPath.basename(_origAdd || item));
      });
    });
  }

  return this;
}

/**
 * Close watchers or start ignoring events from specified paths.
 * @param {Path|Array<Path>} paths_ - string or array of strings, file/directory paths and/or globs
 * @returns {FSWatcher} for chaining
*/
unwatch(paths_) {
  if (this.closed) return this;
  const paths = unifyPaths(paths_);
  const {cwd} = this.options;

  paths.forEach((path) => {
    // convert to absolute path unless relative path already matches
    if (!sysPath.isAbsolute(path) && !this._closers.has(path)) {
      if (cwd) path = sysPath.join(cwd, path);
      path = sysPath.resolve(path);
    }

    this._closePath(path);

    this._ignoredPaths.add(path);
    if (this._watched.has(path)) {
      this._ignoredPaths.add(path + SLASH_GLOBSTAR);
    }

    // reset the cached userIgnored anymatch fn
    // to make ignoredPaths changes effective
    this._userIgnored = undefined;
  });

  return this;
}

/**
 * Close watchers and remove all listeners from watched paths.
 * @returns {Promise<void>}.
*/
close() {
  if (this.closed) return this._closePromise;
  this.closed = true;

  // Memory management.
  this.removeAllListeners();
  const closers = [];
  this._closers.forEach(closerList => closerList.forEach(closer => {
    const promise = closer();
    if (promise instanceof Promise) closers.push(promise);
  }));
  this._streams.forEach(stream => stream.destroy());
  this._userIgnored = undefined;
  this._readyCount = 0;
  this._readyEmitted = false;
  this._watched.forEach(dirent => dirent.dispose());
  ['closers', 'watched', 'streams', 'symlinkPaths', 'throttled'].forEach(key => {
    this[`_${key}`].clear();
  });

  this._closePromise = closers.length ? Promise.all(closers).then(() => undefined) : Promise.resolve();
  return this._closePromise;
}

/**
 * Expose list of watched paths
 * @returns {Object} for chaining
*/
getWatched() {
  const watchList = {};
  this._watched.forEach((entry, dir) => {
    const key = this.options.cwd ? sysPath.relative(this.options.cwd, dir) : dir;
    watchList[key || ONE_DOT] = entry.getChildren().sort();
  });
  return watchList;
}

emitWithAll(event, args) {
  this.emit(...args);
  if (event !== EV_ERROR) this.emit(EV_ALL, ...args);
}

// Common helpers
// --------------

/**
 * Normalize and emit events.
 * Calling _emit DOES NOT MEAN emit() would be called!
 * @param {EventName} event Type of event
 * @param {Path} path File or directory path
 * @param {*=} val1 arguments to be passed with event
 * @param {*=} val2
 * @param {*=} val3
 * @returns the error if defined, otherwise the value of the FSWatcher instance's `closed` flag
 */
async _emit(event, path, val1, val2, val3) {
  if (this.closed) return;

  const opts = this.options;
  if (isWindows) path = sysPath.normalize(path);
  if (opts.cwd) path = sysPath.relative(opts.cwd, path);
  /** @type Array<any> */
  const args = [event, path];
  if (val3 !== undefined) args.push(val1, val2, val3);
  else if (val2 !== undefined) args.push(val1, val2);
  else if (val1 !== undefined) args.push(val1);

  const awf = opts.awaitWriteFinish;
  let pw;
  if (awf && (pw = this._pendingWrites.get(path))) {
    pw.lastChange = new Date();
    return this;
  }

  if (opts.atomic) {
    if (event === EV_UNLINK) {
      this._pendingUnlinks.set(path, args);
      setTimeout(() => {
        this._pendingUnlinks.forEach((entry, path) => {
          this.emit(...entry);
          this.emit(EV_ALL, ...entry);
          this._pendingUnlinks.delete(path);
        });
      }, typeof opts.atomic === 'number' ? opts.atomic : 100);
      return this;
    }
    if (event === EV_ADD && this._pendingUnlinks.has(path)) {
      event = args[0] = EV_CHANGE;
      this._pendingUnlinks.delete(path);
    }
  }

  if (awf && (event === EV_ADD || event === EV_CHANGE) && this._readyEmitted) {
    const awfEmit = (err, stats) => {
      if (err) {
        event = args[0] = EV_ERROR;
        args[1] = err;
        this.emitWithAll(event, args);
      } else if (stats) {
        // if stats doesn't exist the file must have been deleted
        if (args.length > 2) {
          args[2] = stats;
        } else {
          args.push(stats);
        }
        this.emitWithAll(event, args);
      }
    };

    this._awaitWriteFinish(path, awf.stabilityThreshold, event, awfEmit);
    return this;
  }

  if (event === EV_CHANGE) {
    const isThrottled = !this._throttle(EV_CHANGE, path, 50);
    if (isThrottled) return this;
  }

  if (opts.alwaysStat && val1 === undefined &&
    (event === EV_ADD || event === EV_ADD_DIR || event === EV_CHANGE)
  ) {
    const fullPath = opts.cwd ? sysPath.join(opts.cwd, path) : path;
    let stats;
    try {
      stats = await stat(fullPath);
    } catch (err) {}
    // Suppress event when fs_stat fails, to avoid sending undefined 'stat'
    if (!stats || this.closed) return;
    args.push(stats);
  }
  this.emitWithAll(event, args);

  return this;
}

/**
 * Common handler for errors
 * @param {Error} error
 * @returns {Error|Boolean} The error if defined, otherwise the value of the FSWatcher instance's `closed` flag
 */
_handleError(error) {
  const code = error && error.code;
  if (error && code !== 'ENOENT' && code !== 'ENOTDIR' &&
    (!this.options.ignorePermissionErrors || (code !== 'EPERM' && code !== 'EACCES'))
  ) {
    this.emit(EV_ERROR, error);
  }
  return error || this.closed;
}

/**
 * Helper utility for throttling
 * @param {ThrottleType} actionType type being throttled
 * @param {Path} path being acted upon
 * @param {Number} timeout duration of time to suppress duplicate actions
 * @returns {Object|false} tracking object or false if action should be suppressed
 */
_throttle(actionType, path, timeout) {
  if (!this._throttled.has(actionType)) {
    this._throttled.set(actionType, new Map());
  }

  /** @type {Map<Path, Object>} */
  const action = this._throttled.get(actionType);
  /** @type {Object} */
  const actionPath = action.get(path);

  if (actionPath) {
    actionPath.count++;
    return false;
  }

  let timeoutObject;
  const clear = () => {
    const item = action.get(path);
    const count = item ? item.count : 0;
    action.delete(path);
    clearTimeout(timeoutObject);
    if (item) clearTimeout(item.timeoutObject);
    return count;
  };
  timeoutObject = setTimeout(clear, timeout);
  const thr = {timeoutObject, clear, count: 0};
  action.set(path, thr);
  return thr;
}

_incrReadyCount() {
  return this._readyCount++;
}

/**
 * Awaits write operation to finish.
 * Polls a newly created file for size variations. When files size does not change for 'threshold' milliseconds calls callback.
 * @param {Path} path being acted upon
 * @param {Number} threshold Time in milliseconds a file size must be fixed before acknowledging write OP is finished
 * @param {EventName} event
 * @param {Function} awfEmit Callback to be called when ready for event to be emitted.
 */
_awaitWriteFinish(path, threshold, event, awfEmit) {
  let timeoutHandler;

  let fullPath = path;
  if (this.options.cwd && !sysPath.isAbsolute(path)) {
    fullPath = sysPath.join(this.options.cwd, path);
  }

  const now = new Date();

  const awaitWriteFinish = (prevStat) => {
    fs.stat(fullPath, (err, curStat) => {
      if (err || !this._pendingWrites.has(path)) {
        if (err && err.code !== 'ENOENT') awfEmit(err);
        return;
      }

      const now = Number(new Date());

      if (prevStat && curStat.size !== prevStat.size) {
        this._pendingWrites.get(path).lastChange = now;
      }
      const pw = this._pendingWrites.get(path);
      const df = now - pw.lastChange;

      if (df >= threshold) {
        this._pendingWrites.delete(path);
        awfEmit(undefined, curStat);
      } else {
        timeoutHandler = setTimeout(
          awaitWriteFinish,
          this.options.awaitWriteFinish.pollInterval,
          curStat
        );
      }
    });
  };

  if (!this._pendingWrites.has(path)) {
    this._pendingWrites.set(path, {
      lastChange: now,
      cancelWait: () => {
        this._pendingWrites.delete(path);
        clearTimeout(timeoutHandler);
        return event;
      }
    });
    timeoutHandler = setTimeout(
      awaitWriteFinish,
      this.options.awaitWriteFinish.pollInterval
    );
  }
}

_getGlobIgnored() {
  return [...this._ignoredPaths.values()];
}

/**
 * Determines whether user has asked to ignore this path.
 * @param {Path} path filepath or dir
 * @param {fs.Stats=} stats result of fs.stat
 * @returns {Boolean}
 */
_isIgnored(path, stats) {
  if (this.options.atomic && DOT_RE.test(path)) return true;
  if (!this._userIgnored) {
    const {cwd} = this.options;
    const ign = this.options.ignored;

    const ignored = ign && ign.map(normalizeIgnored(cwd));
    const paths = arrify(ignored)
      .filter((path) => typeof path === STRING_TYPE && !isGlob(path))
      .map((path) => path + SLASH_GLOBSTAR);
    const list = this._getGlobIgnored().map(normalizeIgnored(cwd)).concat(ignored, paths);
    this._userIgnored = anymatch(list, undefined, ANYMATCH_OPTS);
  }

  return this._userIgnored([path, stats]);
}

_isntIgnored(path, stat) {
  return !this._isIgnored(path, stat);
}

/**
 * Provides a set of common helpers and properties relating to symlink and glob handling.
 * @param {Path} path file, directory, or glob pattern being watched
 * @param {Number=} depth at any depth > 0, this isn't a glob
 * @returns {WatchHelper} object containing helpers for this path
 */
_getWatchHelpers(path, depth) {
  const watchPath = depth || this.options.disableGlobbing || !isGlob(path) ? path : globParent(path);
  const follow = this.options.followSymlinks;

  return new WatchHelper(path, watchPath, follow, this);
}

// Directory helpers
// -----------------

/**
 * Provides directory tracking objects
 * @param {String} directory path of the directory
 * @returns {DirEntry} the directory's tracking object
 */
_getWatchedDir(directory) {
  if (!this._boundRemove) this._boundRemove = this._remove.bind(this);
  const dir = sysPath.resolve(directory);
  if (!this._watched.has(dir)) this._watched.set(dir, new DirEntry(dir, this._boundRemove));
  return this._watched.get(dir);
}

// File helpers
// ------------

/**
 * Check for read permissions.
 * Based on this answer on SO: https://stackoverflow.com/a/11781404/1358405
 * @param {fs.Stats} stats - object, result of fs_stat
 * @returns {Boolean} indicates whether the file can be read
*/
_hasReadPermissions(stats) {
  if (this.options.ignorePermissionErrors) return true;

  // stats.mode may be bigint
  const md = stats && Number.parseInt(stats.mode, 10);
  const st = md & 0o777;
  const it = Number.parseInt(st.toString(8)[0], 10);
  return Boolean(4 & it);
}

/**
 * Handles emitting unlink events for
 * files and directories, and via recursion, for
 * files and directories within directories that are unlinked
 * @param {String} directory within which the following item is located
 * @param {String} item      base path of item/directory
 * @returns {void}
*/
_remove(directory, item, isDirectory) {
  // if what is being deleted is a directory, get that directory's paths
  // for recursive deleting and cleaning of watched object
  // if it is not a directory, nestedDirectoryChildren will be empty array
  const path = sysPath.join(directory, item);
  const fullPath = sysPath.resolve(path);
  isDirectory = isDirectory != null
    ? isDirectory
    : this._watched.has(path) || this._watched.has(fullPath);

  // prevent duplicate handling in case of arriving here nearly simultaneously
  // via multiple paths (such as _handleFile and _handleDir)
  if (!this._throttle('remove', path, 100)) return;

  // if the only watched file is removed, watch for its return
  if (!isDirectory && !this.options.useFsEvents && this._watched.size === 1) {
    this.add(directory, item, true);
  }

  // This will create a new entry in the watched object in either case
  // so we got to do the directory check beforehand
  const wp = this._getWatchedDir(path);
  const nestedDirectoryChildren = wp.getChildren();

  // Recursively remove children directories / files.
  nestedDirectoryChildren.forEach(nested => this._remove(path, nested));

  // Check if item was on the watched list and remove it
  const parent = this._getWatchedDir(directory);
  const wasTracked = parent.has(item);
  parent.remove(item);

  // Fixes issue #1042 -> Relative paths were detected and added as symlinks
  // (https://github.com/paulmillr/chokidar/blob/e1753ddbc9571bdc33b4a4af172d52cb6e611c10/lib/nodefs-handler.js#L612),
  // but never removed from the map in case the path was deleted.
  // This leads to an incorrect state if the path was recreated:
  // https://github.com/paulmillr/chokidar/blob/e1753ddbc9571bdc33b4a4af172d52cb6e611c10/lib/nodefs-handler.js#L553
  if (this._symlinkPaths.has(fullPath)) {
    this._symlinkPaths.delete(fullPath);
  }

  // If we wait for this file to be fully written, cancel the wait.
  let relPath = path;
  if (this.options.cwd) relPath = sysPath.relative(this.options.cwd, path);
  if (this.options.awaitWriteFinish && this._pendingWrites.has(relPath)) {
    const event = this._pendingWrites.get(relPath).cancelWait();
    if (event === EV_ADD) return;
  }

  // The Entry will either be a directory that just got removed
  // or a bogus entry to a file, in either case we have to remove it
  this._watched.delete(path);
  this._watched.delete(fullPath);
  const eventName = isDirectory ? EV_UNLINK_DIR : EV_UNLINK;
  if (wasTracked && !this._isIgnored(path)) this._emit(eventName, path);

  // Avoid conflicts if we later create another file with the same name
  if (!this.options.useFsEvents) {
    this._closePath(path);
  }
}

/**
 * Closes all watchers for a path
 * @param {Path} path
 */
_closePath(path) {
  this._closeFile(path);
  const dir = sysPath.dirname(path);
  this._getWatchedDir(dir).remove(sysPath.basename(path));
}

/**
 * Closes only file-specific watchers
 * @param {Path} path
 */
_closeFile(path) {
  const closers = this._closers.get(path);
  if (!closers) return;
  closers.forEach(closer => closer());
  this._closers.delete(path);
}

/**
 *
 * @param {Path} path
 * @param {Function} closer
 */
_addPathCloser(path, closer) {
  if (!closer) return;
  let list = this._closers.get(path);
  if (!list) {
    list = [];
    this._closers.set(path, list);
  }
  list.push(closer);
}

_readdirp(root, opts) {
  if (this.closed) return;
  const options = {type: EV_ALL, alwaysStat: true, lstat: true, ...opts};
  let stream = readdirp(root, options);
  this._streams.add(stream);
  stream.once(STR_CLOSE, () => {
    stream = undefined;
  });
  stream.once(STR_END, () => {
    if (stream) {
      this._streams.delete(stream);
      stream = undefined;
    }
  });
  return stream;
}

}

// Export FSWatcher class
chokidar.FSWatcher = FSWatcher;

/**
 * Instantiates watcher with paths to be tracked.
 * @param {String|Array<String>} paths file/directory paths and/or globs
 * @param {Object=} options chokidar opts
 * @returns an instance of FSWatcher for chaining.
 */
const watch = (paths, options) => {
  const watcher = new FSWatcher(options);
  watcher.add(paths);
  return watcher;
};

chokidar.watch = watch;

exports.chokidar = chokidar;
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