更新前端静态网页获取方式,放弃使用后端获取api

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The MIT License (MIT)
Copyright (c) 2012-2019 Paul Miller (https://paulmillr.com), Elan Shanker
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the “Software”), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# Chokidar [![Weekly downloads](https://img.shields.io/npm/dw/chokidar.svg)](https://github.com/paulmillr/chokidar) [![Yearly downloads](https://img.shields.io/npm/dy/chokidar.svg)](https://github.com/paulmillr/chokidar)
> Minimal and efficient cross-platform file watching library
[![NPM](https://nodei.co/npm/chokidar.png)](https://www.npmjs.com/package/chokidar)
## Why?
Node.js `fs.watch`:
* Doesn't report filenames on MacOS.
* Doesn't report events at all when using editors like Sublime on MacOS.
* Often reports events twice.
* Emits most changes as `rename`.
* Does not provide an easy way to recursively watch file trees.
* Does not support recursive watching on Linux.
Node.js `fs.watchFile`:
* Almost as bad at event handling.
* Also does not provide any recursive watching.
* Results in high CPU utilization.
Chokidar resolves these problems.
Initially made for **[Brunch](https://brunch.io/)** (an ultra-swift web app build tool), it is now used in
[Microsoft's Visual Studio Code](https://github.com/microsoft/vscode),
[gulp](https://github.com/gulpjs/gulp/),
[karma](https://karma-runner.github.io/),
[PM2](https://github.com/Unitech/PM2),
[browserify](http://browserify.org/),
[webpack](https://webpack.github.io/),
[BrowserSync](https://www.browsersync.io/),
and [many others](https://www.npmjs.com/browse/depended/chokidar).
It has proven itself in production environments.
Version 3 is out! Check out our blog post about it: [Chokidar 3: How to save 32TB of traffic every week](https://paulmillr.com/posts/chokidar-3-save-32tb-of-traffic/)
## How?
Chokidar does still rely on the Node.js core `fs` module, but when using
`fs.watch` and `fs.watchFile` for watching, it normalizes the events it
receives, often checking for truth by getting file stats and/or dir contents.
On MacOS, chokidar by default uses a native extension exposing the Darwin
`FSEvents` API. This provides very efficient recursive watching compared with
implementations like `kqueue` available on most \*nix platforms. Chokidar still
does have to do some work to normalize the events received that way as well.
On most other platforms, the `fs.watch`-based implementation is the default, which
avoids polling and keeps CPU usage down. Be advised that chokidar will initiate
watchers recursively for everything within scope of the paths that have been
specified, so be judicious about not wasting system resources by watching much
more than needed.
## Getting started
Install with npm:
```sh
npm install chokidar
```
Then `require` and use it in your code:
```javascript
const chokidar = require('chokidar');
// One-liner for current directory
chokidar.watch('.').on('all', (event, path) => {
console.log(event, path);
});
```
## API
```javascript
// Example of a more typical implementation structure
// Initialize watcher.
const watcher = chokidar.watch('file, dir, glob, or array', {
ignored: /(^|[\/\\])\../, // ignore dotfiles
persistent: true
});
// Something to use when events are received.
const log = console.log.bind(console);
// Add event listeners.
watcher
.on('add', path => log(`File ${path} has been added`))
.on('change', path => log(`File ${path} has been changed`))
.on('unlink', path => log(`File ${path} has been removed`));
// More possible events.
watcher
.on('addDir', path => log(`Directory ${path} has been added`))
.on('unlinkDir', path => log(`Directory ${path} has been removed`))
.on('error', error => log(`Watcher error: ${error}`))
.on('ready', () => log('Initial scan complete. Ready for changes'))
.on('raw', (event, path, details) => { // internal
log('Raw event info:', event, path, details);
});
// 'add', 'addDir' and 'change' events also receive stat() results as second
// argument when available: https://nodejs.org/api/fs.html#fs_class_fs_stats
watcher.on('change', (path, stats) => {
if (stats) console.log(`File ${path} changed size to ${stats.size}`);
});
// Watch new files.
watcher.add('new-file');
watcher.add(['new-file-2', 'new-file-3', '**/other-file*']);
// Get list of actual paths being watched on the filesystem
var watchedPaths = watcher.getWatched();
// Un-watch some files.
await watcher.unwatch('new-file*');
// Stop watching.
// The method is async!
watcher.close().then(() => console.log('closed'));
// Full list of options. See below for descriptions.
// Do not use this example!
chokidar.watch('file', {
persistent: true,
ignored: '*.txt',
ignoreInitial: false,
followSymlinks: true,
cwd: '.',
disableGlobbing: false,
usePolling: false,
interval: 100,
binaryInterval: 300,
alwaysStat: false,
depth: 99,
awaitWriteFinish: {
stabilityThreshold: 2000,
pollInterval: 100
},
ignorePermissionErrors: false,
atomic: true // or a custom 'atomicity delay', in milliseconds (default 100)
});
```
`chokidar.watch(paths, [options])`
* `paths` (string or array of strings). Paths to files, dirs to be watched
recursively, or glob patterns.
- Note: globs must not contain windows separators (`\`),
because that's how they work by the standard —
you'll need to replace them with forward slashes (`/`).
- Note 2: for additional glob documentation, check out low-level
library: [picomatch](https://github.com/micromatch/picomatch).
* `options` (object) Options object as defined below:
#### Persistence
* `persistent` (default: `true`). Indicates whether the process
should continue to run as long as files are being watched. If set to
`false` when using `fsevents` to watch, no more events will be emitted
after `ready`, even if the process continues to run.
#### Path filtering
* `ignored` ([anymatch](https://github.com/es128/anymatch)-compatible definition)
Defines files/paths to be ignored. The whole relative or absolute path is
tested, not just filename. If a function with two arguments is provided, it
gets called twice per path - once with a single argument (the path), second
time with two arguments (the path and the
[`fs.Stats`](https://nodejs.org/api/fs.html#fs_class_fs_stats)
object of that path).
* `ignoreInitial` (default: `false`). If set to `false` then `add`/`addDir` events are also emitted for matching paths while
instantiating the watching as chokidar discovers these file paths (before the `ready` event).
* `followSymlinks` (default: `true`). When `false`, only the
symlinks themselves will be watched for changes instead of following
the link references and bubbling events through the link's path.
* `cwd` (no default). The base directory from which watch `paths` are to be
derived. Paths emitted with events will be relative to this.
* `disableGlobbing` (default: `false`). If set to `true` then the strings passed to `.watch()` and `.add()` are treated as
literal path names, even if they look like globs.
#### Performance
* `usePolling` (default: `false`).
Whether to use fs.watchFile (backed by polling), or fs.watch. If polling
leads to high CPU utilization, consider setting this to `false`. It is
typically necessary to **set this to `true` to successfully watch files over
a network**, and it may be necessary to successfully watch files in other
non-standard situations. Setting to `true` explicitly on MacOS overrides the
`useFsEvents` default. You may also set the CHOKIDAR_USEPOLLING env variable
to true (1) or false (0) in order to override this option.
* _Polling-specific settings_ (effective when `usePolling: true`)
* `interval` (default: `100`). Interval of file system polling, in milliseconds. You may also
set the CHOKIDAR_INTERVAL env variable to override this option.
* `binaryInterval` (default: `300`). Interval of file system
polling for binary files.
([see list of binary extensions](https://github.com/sindresorhus/binary-extensions/blob/master/binary-extensions.json))
* `useFsEvents` (default: `true` on MacOS). Whether to use the
`fsevents` watching interface if available. When set to `true` explicitly
and `fsevents` is available this supercedes the `usePolling` setting. When
set to `false` on MacOS, `usePolling: true` becomes the default.
* `alwaysStat` (default: `false`). If relying upon the
[`fs.Stats`](https://nodejs.org/api/fs.html#fs_class_fs_stats)
object that may get passed with `add`, `addDir`, and `change` events, set
this to `true` to ensure it is provided even in cases where it wasn't
already available from the underlying watch events.
* `depth` (default: `undefined`). If set, limits how many levels of
subdirectories will be traversed.
* `awaitWriteFinish` (default: `false`).
By default, the `add` event will fire when a file first appears on disk, before
the entire file has been written. Furthermore, in some cases some `change`
events will be emitted while the file is being written. In some cases,
especially when watching for large files there will be a need to wait for the
write operation to finish before responding to a file creation or modification.
Setting `awaitWriteFinish` to `true` (or a truthy value) will poll file size,
holding its `add` and `change` events until the size does not change for a
configurable amount of time. The appropriate duration setting is heavily
dependent on the OS and hardware. For accurate detection this parameter should
be relatively high, making file watching much less responsive.
Use with caution.
* *`options.awaitWriteFinish` can be set to an object in order to adjust
timing params:*
* `awaitWriteFinish.stabilityThreshold` (default: 2000). Amount of time in
milliseconds for a file size to remain constant before emitting its event.
* `awaitWriteFinish.pollInterval` (default: 100). File size polling interval, in milliseconds.
#### Errors
* `ignorePermissionErrors` (default: `false`). Indicates whether to watch files
that don't have read permissions if possible. If watching fails due to `EPERM`
or `EACCES` with this set to `true`, the errors will be suppressed silently.
* `atomic` (default: `true` if `useFsEvents` and `usePolling` are `false`).
Automatically filters out artifacts that occur when using editors that use
"atomic writes" instead of writing directly to the source file. If a file is
re-added within 100 ms of being deleted, Chokidar emits a `change` event
rather than `unlink` then `add`. If the default of 100 ms does not work well
for you, you can override it by setting `atomic` to a custom value, in
milliseconds.
### Methods & Events
`chokidar.watch()` produces an instance of `FSWatcher`. Methods of `FSWatcher`:
* `.add(path / paths)`: Add files, directories, or glob patterns for tracking.
Takes an array of strings or just one string.
* `.on(event, callback)`: Listen for an FS event.
Available events: `add`, `addDir`, `change`, `unlink`, `unlinkDir`, `ready`,
`raw`, `error`.
Additionally `all` is available which gets emitted with the underlying event
name and path for every event other than `ready`, `raw`, and `error`. `raw` is internal, use it carefully.
* `.unwatch(path / paths)`: Stop watching files, directories, or glob patterns.
Takes an array of strings or just one string.
* `.close()`: **async** Removes all listeners from watched files. Asynchronous, returns Promise. Use with `await` to ensure bugs don't happen.
* `.getWatched()`: Returns an object representing all the paths on the file
system being watched by this `FSWatcher` instance. The object's keys are all the
directories (using absolute paths unless the `cwd` option was used), and the
values are arrays of the names of the items contained in each directory.
## CLI
If you need a CLI interface for your file watching, check out
[chokidar-cli](https://github.com/open-cli-tools/chokidar-cli), allowing you to
execute a command on each change, or get a stdio stream of change events.
## Install Troubleshooting
* `npm WARN optional dep failed, continuing fsevents@n.n.n`
* This message is normal part of how `npm` handles optional dependencies and is
not indicative of a problem. Even if accompanied by other related error messages,
Chokidar should function properly.
* `TypeError: fsevents is not a constructor`
* Update chokidar by doing `rm -rf node_modules package-lock.json yarn.lock && npm install`, or update your dependency that uses chokidar.
* Chokidar is producing `ENOSP` error on Linux, like this:
* `bash: cannot set terminal process group (-1): Inappropriate ioctl for device bash: no job control in this shell`
`Error: watch /home/ ENOSPC`
* This means Chokidar ran out of file handles and you'll need to increase their count by executing the following command in Terminal:
`echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p`
## Changelog
For more detailed changelog, see [`full_changelog.md`](.github/full_changelog.md).
- **v3.5 (Jan 6, 2021):** Support for ARM Macs with Apple Silicon. Fixes for deleted symlinks.
- **v3.4 (Apr 26, 2020):** Support for directory-based symlinks. Fixes for macos file replacement.
- **v3.3 (Nov 2, 2019):** `FSWatcher#close()` method became async. That fixes IO race conditions related to close method.
- **v3.2 (Oct 1, 2019):** Improve Linux RAM usage by 50%. Race condition fixes. Windows glob fixes. Improve stability by using tight range of dependency versions.
- **v3.1 (Sep 16, 2019):** dotfiles are no longer filtered out by default. Use `ignored` option if needed. Improve initial Linux scan time by 50%.
- **v3 (Apr 30, 2019):** massive CPU & RAM consumption improvements; reduces deps / package size by a factor of 17x and bumps Node.js requirement to v8.16 and higher.
- **v2 (Dec 29, 2017):** Globs are now posix-style-only; without windows support. Tons of bugfixes.
- **v1 (Apr 7, 2015):** Glob support, symlink support, tons of bugfixes. Node 0.8+ is supported
- **v0.1 (Apr 20, 2012):** Initial release, extracted from [Brunch](https://github.com/brunch/brunch/blob/9847a065aea300da99bd0753f90354cde9de1261/src/helpers.coffee#L66)
## Also
Why was chokidar named this way? What's the meaning behind it?
>Chowkidar is a transliteration of a Hindi word meaning 'watchman, gatekeeper', चौकीदार. This ultimately comes from Sanskrit _ चतुष्क_ (crossway, quadrangle, consisting-of-four). This word is also used in other languages like Urdu as (چوکیدار) which is widely used in Pakistan and India.
## License
MIT (c) Paul Miller (<https://paulmillr.com>), see [LICENSE](LICENSE) file.

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'use strict';
const { EventEmitter } = require('events');
const fs = require('fs');
const sysPath = require('path');
const { promisify } = require('util');
const readdirp = require('readdirp');
const anymatch = require('anymatch').default;
const globParent = require('glob-parent');
const isGlob = require('is-glob');
const braces = require('braces');
const normalizePath = require('normalize-path');
const NodeFsHandler = require('./lib/nodefs-handler');
const FsEventsHandler = require('./lib/fsevents-handler');
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
} = require('./lib/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);
}
// Youre frozen when your hearts 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 += paths.length;
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
exports.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;
};
exports.watch = watch;

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@@ -0,0 +1,110 @@
### [5.1.2](https://github.com/gulpjs/glob-parent/compare/v5.1.1...v5.1.2) (2021-03-06)
### Bug Fixes
* eliminate ReDoS ([#36](https://github.com/gulpjs/glob-parent/issues/36)) ([f923116](https://github.com/gulpjs/glob-parent/commit/f9231168b0041fea3f8f954b3cceb56269fc6366))
### [5.1.1](https://github.com/gulpjs/glob-parent/compare/v5.1.0...v5.1.1) (2021-01-27)
### Bug Fixes
* unescape exclamation mark ([#26](https://github.com/gulpjs/glob-parent/issues/26)) ([a98874f](https://github.com/gulpjs/glob-parent/commit/a98874f1a59e407f4fb1beb0db4efa8392da60bb))
## [5.1.0](https://github.com/gulpjs/glob-parent/compare/v5.0.0...v5.1.0) (2021-01-27)
### Features
* add `flipBackslashes` option to disable auto conversion of slashes (closes [#24](https://github.com/gulpjs/glob-parent/issues/24)) ([#25](https://github.com/gulpjs/glob-parent/issues/25)) ([eecf91d](https://github.com/gulpjs/glob-parent/commit/eecf91d5e3834ed78aee39c4eaaae654d76b87b3))
## [5.0.0](https://github.com/gulpjs/glob-parent/compare/v4.0.0...v5.0.0) (2021-01-27)
### ⚠ BREAKING CHANGES
* Drop support for node <6 & bump dependencies
### Miscellaneous Chores
* Drop support for node <6 & bump dependencies ([896c0c0](https://github.com/gulpjs/glob-parent/commit/896c0c00b4e7362f60b96e7fc295ae929245255a))
## [4.0.0](https://github.com/gulpjs/glob-parent/compare/v3.1.0...v4.0.0) (2021-01-27)
### ⚠ BREAKING CHANGES
* question marks are valid path characters on Windows so avoid flagging as a glob when alone
* Update is-glob dependency
### Features
* hoist regexps and strings for performance gains ([4a80667](https://github.com/gulpjs/glob-parent/commit/4a80667c69355c76a572a5892b0f133c8e1f457e))
* question marks are valid path characters on Windows so avoid flagging as a glob when alone ([2a551dd](https://github.com/gulpjs/glob-parent/commit/2a551dd0dc3235e78bf3c94843d4107072d17841))
* Update is-glob dependency ([e41fcd8](https://github.com/gulpjs/glob-parent/commit/e41fcd895d1f7bc617dba45c9d935a7949b9c281))
## [3.1.0](https://github.com/gulpjs/glob-parent/compare/v3.0.1...v3.1.0) (2021-01-27)
### Features
* allow basic win32 backslash use ([272afa5](https://github.com/gulpjs/glob-parent/commit/272afa5fd070fc0f796386a5993d4ee4a846988b))
* handle extglobs (parentheses) containing separators ([7db1bdb](https://github.com/gulpjs/glob-parent/commit/7db1bdb0756e55fd14619e8ce31aa31b17b117fd))
* new approach to braces/brackets handling ([8269bd8](https://github.com/gulpjs/glob-parent/commit/8269bd89290d99fac9395a354fb56fdcdb80f0be))
* pre-process braces/brackets sections ([9ef8a87](https://github.com/gulpjs/glob-parent/commit/9ef8a87f66b1a43d0591e7a8e4fc5a18415ee388))
* preserve escaped brace/bracket at end of string ([8cfb0ba](https://github.com/gulpjs/glob-parent/commit/8cfb0ba84202d51571340dcbaf61b79d16a26c76))
### Bug Fixes
* trailing escaped square brackets ([99ec9fe](https://github.com/gulpjs/glob-parent/commit/99ec9fecc60ee488ded20a94dd4f18b4f55c4ccf))
### [3.0.1](https://github.com/gulpjs/glob-parent/compare/v3.0.0...v3.0.1) (2021-01-27)
### Features
* use path-dirname ponyfill ([cdbea5f](https://github.com/gulpjs/glob-parent/commit/cdbea5f32a58a54e001a75ddd7c0fccd4776aacc))
### Bug Fixes
* unescape glob-escaped dirnames on output ([598c533](https://github.com/gulpjs/glob-parent/commit/598c533bdf49c1428bc063aa9b8db40c5a86b030))
## [3.0.0](https://github.com/gulpjs/glob-parent/compare/v2.0.0...v3.0.0) (2021-01-27)
### ⚠ BREAKING CHANGES
* update is-glob dependency
### Features
* update is-glob dependency ([5c5f8ef](https://github.com/gulpjs/glob-parent/commit/5c5f8efcee362a8e7638cf8220666acd8784f6bd))
## [2.0.0](https://github.com/gulpjs/glob-parent/compare/v1.3.0...v2.0.0) (2021-01-27)
### Features
* move up to dirname regardless of glob characters ([f97fb83](https://github.com/gulpjs/glob-parent/commit/f97fb83be2e0a9fc8d3b760e789d2ecadd6aa0c2))
## [1.3.0](https://github.com/gulpjs/glob-parent/compare/v1.2.0...v1.3.0) (2021-01-27)
## [1.2.0](https://github.com/gulpjs/glob-parent/compare/v1.1.0...v1.2.0) (2021-01-27)
### Reverts
* feat: make regex test strings smaller ([dc80fa9](https://github.com/gulpjs/glob-parent/commit/dc80fa9658dca20549cfeba44bbd37d5246fcce0))
## [1.1.0](https://github.com/gulpjs/glob-parent/compare/v1.0.0...v1.1.0) (2021-01-27)
### Features
* make regex test strings smaller ([cd83220](https://github.com/gulpjs/glob-parent/commit/cd832208638f45169f986d80fcf66e401f35d233))
## 1.0.0 (2021-01-27)

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@@ -0,0 +1,15 @@
The ISC License
Copyright (c) 2015, 2019 Elan Shanker
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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<p align="center">
<a href="https://gulpjs.com">
<img height="257" width="114" src="https://raw.githubusercontent.com/gulpjs/artwork/master/gulp-2x.png">
</a>
</p>
# glob-parent
[![NPM version][npm-image]][npm-url] [![Downloads][downloads-image]][npm-url] [![Azure Pipelines Build Status][azure-pipelines-image]][azure-pipelines-url] [![Travis Build Status][travis-image]][travis-url] [![AppVeyor Build Status][appveyor-image]][appveyor-url] [![Coveralls Status][coveralls-image]][coveralls-url] [![Gitter chat][gitter-image]][gitter-url]
Extract the non-magic parent path from a glob string.
## Usage
```js
var globParent = require('glob-parent');
globParent('path/to/*.js'); // 'path/to'
globParent('/root/path/to/*.js'); // '/root/path/to'
globParent('/*.js'); // '/'
globParent('*.js'); // '.'
globParent('**/*.js'); // '.'
globParent('path/{to,from}'); // 'path'
globParent('path/!(to|from)'); // 'path'
globParent('path/?(to|from)'); // 'path'
globParent('path/+(to|from)'); // 'path'
globParent('path/*(to|from)'); // 'path'
globParent('path/@(to|from)'); // 'path'
globParent('path/**/*'); // 'path'
// if provided a non-glob path, returns the nearest dir
globParent('path/foo/bar.js'); // 'path/foo'
globParent('path/foo/'); // 'path/foo'
globParent('path/foo'); // 'path' (see issue #3 for details)
```
## API
### `globParent(maybeGlobString, [options])`
Takes a string and returns the part of the path before the glob begins. Be aware of Escaping rules and Limitations below.
#### options
```js
{
// Disables the automatic conversion of slashes for Windows
flipBackslashes: true
}
```
## Escaping
The following characters have special significance in glob patterns and must be escaped if you want them to be treated as regular path characters:
- `?` (question mark) unless used as a path segment alone
- `*` (asterisk)
- `|` (pipe)
- `(` (opening parenthesis)
- `)` (closing parenthesis)
- `{` (opening curly brace)
- `}` (closing curly brace)
- `[` (opening bracket)
- `]` (closing bracket)
**Example**
```js
globParent('foo/[bar]/') // 'foo'
globParent('foo/\\[bar]/') // 'foo/[bar]'
```
## Limitations
### Braces & Brackets
This library attempts a quick and imperfect method of determining which path
parts have glob magic without fully parsing/lexing the pattern. There are some
advanced use cases that can trip it up, such as nested braces where the outer
pair is escaped and the inner one contains a path separator. If you find
yourself in the unlikely circumstance of being affected by this or need to
ensure higher-fidelity glob handling in your library, it is recommended that you
pre-process your input with [expand-braces] and/or [expand-brackets].
### Windows
Backslashes are not valid path separators for globs. If a path with backslashes
is provided anyway, for simple cases, glob-parent will replace the path
separator for you and return the non-glob parent path (now with
forward-slashes, which are still valid as Windows path separators).
This cannot be used in conjunction with escape characters.
```js
// BAD
globParent('C:\\Program Files \\(x86\\)\\*.ext') // 'C:/Program Files /(x86/)'
// GOOD
globParent('C:/Program Files\\(x86\\)/*.ext') // 'C:/Program Files (x86)'
```
If you are using escape characters for a pattern without path parts (i.e.
relative to `cwd`), prefix with `./` to avoid confusing glob-parent.
```js
// BAD
globParent('foo \\[bar]') // 'foo '
globParent('foo \\[bar]*') // 'foo '
// GOOD
globParent('./foo \\[bar]') // 'foo [bar]'
globParent('./foo \\[bar]*') // '.'
```
## License
ISC
[expand-braces]: https://github.com/jonschlinkert/expand-braces
[expand-brackets]: https://github.com/jonschlinkert/expand-brackets
[downloads-image]: https://img.shields.io/npm/dm/glob-parent.svg
[npm-url]: https://www.npmjs.com/package/glob-parent
[npm-image]: https://img.shields.io/npm/v/glob-parent.svg
[azure-pipelines-url]: https://dev.azure.com/gulpjs/gulp/_build/latest?definitionId=2&branchName=master
[azure-pipelines-image]: https://dev.azure.com/gulpjs/gulp/_apis/build/status/glob-parent?branchName=master
[travis-url]: https://travis-ci.org/gulpjs/glob-parent
[travis-image]: https://img.shields.io/travis/gulpjs/glob-parent.svg?label=travis-ci
[appveyor-url]: https://ci.appveyor.com/project/gulpjs/glob-parent
[appveyor-image]: https://img.shields.io/appveyor/ci/gulpjs/glob-parent.svg?label=appveyor
[coveralls-url]: https://coveralls.io/r/gulpjs/glob-parent
[coveralls-image]: https://img.shields.io/coveralls/gulpjs/glob-parent/master.svg
[gitter-url]: https://gitter.im/gulpjs/gulp
[gitter-image]: https://badges.gitter.im/gulpjs/gulp.svg

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'use strict';
var isGlob = require('is-glob');
var pathPosixDirname = require('path').posix.dirname;
var isWin32 = require('os').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}
*/
module.exports = 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(str) || globby.test(str));
// remove escape chars and return result
return str.replace(escaped, '$1');
};

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{
"name": "glob-parent",
"version": "5.1.2",
"description": "Extract the non-magic parent path from a glob string.",
"author": "Gulp Team <team@gulpjs.com> (https://gulpjs.com/)",
"contributors": [
"Elan Shanker (https://github.com/es128)",
"Blaine Bublitz <blaine.bublitz@gmail.com>"
],
"repository": "gulpjs/glob-parent",
"license": "ISC",
"engines": {
"node": ">= 6"
},
"main": "index.js",
"files": [
"LICENSE",
"index.js"
],
"scripts": {
"lint": "eslint .",
"pretest": "npm run lint",
"test": "nyc mocha --async-only",
"azure-pipelines": "nyc mocha --async-only --reporter xunit -O output=test.xunit",
"coveralls": "nyc report --reporter=text-lcov | coveralls"
},
"dependencies": {
"is-glob": "^4.0.1"
},
"devDependencies": {
"coveralls": "^3.0.11",
"eslint": "^2.13.1",
"eslint-config-gulp": "^3.0.1",
"expect": "^1.20.2",
"mocha": "^6.0.2",
"nyc": "^13.3.0"
},
"keywords": [
"glob",
"parent",
"strip",
"path",
"dirname",
"directory",
"base",
"wildcard"
]
}

70
frontend/node_modules/chokidar/package.json generated vendored Normal file
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{
"name": "chokidar",
"description": "Minimal and efficient cross-platform file watching library",
"version": "3.6.0",
"homepage": "https://github.com/paulmillr/chokidar",
"author": "Paul Miller (https://paulmillr.com)",
"contributors": [
"Paul Miller (https://paulmillr.com)",
"Elan Shanker"
],
"engines": {
"node": ">= 8.10.0"
},
"main": "index.js",
"types": "./types/index.d.ts",
"dependencies": {
"anymatch": "~3.1.2",
"braces": "~3.0.2",
"glob-parent": "~5.1.2",
"is-binary-path": "~2.1.0",
"is-glob": "~4.0.1",
"normalize-path": "~3.0.0",
"readdirp": "~3.6.0"
},
"optionalDependencies": {
"fsevents": "~2.3.2"
},
"devDependencies": {
"@types/node": "^14",
"chai": "^4.3",
"dtslint": "^3.3.0",
"eslint": "^7.0.0",
"mocha": "^7.0.0",
"rimraf": "^3.0.0",
"sinon": "^9.0.1",
"sinon-chai": "^3.3.0",
"typescript": "^4.4.3",
"upath": "^1.2.0"
},
"files": [
"index.js",
"lib/*.js",
"types/index.d.ts"
],
"repository": {
"type": "git",
"url": "git+https://github.com/paulmillr/chokidar.git"
},
"bugs": {
"url": "https://github.com/paulmillr/chokidar/issues"
},
"license": "MIT",
"scripts": {
"dtslint": "dtslint types",
"lint": "eslint --report-unused-disable-directives --ignore-path .gitignore .",
"build": "npm ls",
"mocha": "mocha --exit --timeout 90000",
"test": "npm run lint && npm run mocha"
},
"keywords": [
"fs",
"watch",
"watchFile",
"watcher",
"watching",
"file",
"fsevents"
],
"funding": "https://paulmillr.com/funding/"
}

192
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// TypeScript Version: 3.0
/// <reference types="node" />
import * as fs from "fs";
import { EventEmitter } from "events";
import { Matcher } from 'anymatch';
export class FSWatcher extends EventEmitter implements fs.FSWatcher {
options: WatchOptions;
/**
* Constructs a new FSWatcher instance with optional WatchOptions parameter.
*/
constructor(options?: WatchOptions);
/**
* Add files, directories, or glob patterns for tracking. Takes an array of strings or just one
* string.
*/
add(paths: string | ReadonlyArray<string>): this;
/**
* Stop watching files, directories, or glob patterns. Takes an array of strings or just one
* string.
*/
unwatch(paths: string | ReadonlyArray<string>): this;
/**
* Returns an object representing all the paths on the file system being watched by this
* `FSWatcher` instance. The object's keys are all the directories (using absolute paths unless
* the `cwd` option was used), and the values are arrays of the names of the items contained in
* each directory.
*/
getWatched(): {
[directory: string]: string[];
};
/**
* Removes all listeners from watched files.
*/
close(): Promise<void>;
on(event: 'add'|'addDir'|'change', listener: (path: string, stats?: fs.Stats) => void): this;
on(event: 'all', listener: (eventName: 'add'|'addDir'|'change'|'unlink'|'unlinkDir', path: string, stats?: fs.Stats) => void): this;
/**
* Error occurred
*/
on(event: 'error', listener: (error: Error) => void): this;
/**
* Exposes the native Node `fs.FSWatcher events`
*/
on(event: 'raw', listener: (eventName: string, path: string, details: any) => void): this;
/**
* Fires when the initial scan is complete
*/
on(event: 'ready', listener: () => void): this;
on(event: 'unlink'|'unlinkDir', listener: (path: string) => void): this;
on(event: string, listener: (...args: any[]) => void): this;
ref(): this;
unref(): this;
}
export interface WatchOptions {
/**
* Indicates whether the process should continue to run as long as files are being watched. If
* set to `false` when using `fsevents` to watch, no more events will be emitted after `ready`,
* even if the process continues to run.
*/
persistent?: boolean;
/**
* ([anymatch](https://github.com/micromatch/anymatch)-compatible definition) Defines files/paths to
* be ignored. The whole relative or absolute path is tested, not just filename. If a function
* with two arguments is provided, it gets called twice per path - once with a single argument
* (the path), second time with two arguments (the path and the
* [`fs.Stats`](https://nodejs.org/api/fs.html#fs_class_fs_stats) object of that path).
*/
ignored?: Matcher;
/**
* If set to `false` then `add`/`addDir` events are also emitted for matching paths while
* instantiating the watching as chokidar discovers these file paths (before the `ready` event).
*/
ignoreInitial?: boolean;
/**
* When `false`, only the symlinks themselves will be watched for changes instead of following
* the link references and bubbling events through the link's path.
*/
followSymlinks?: boolean;
/**
* The base directory from which watch `paths` are to be derived. Paths emitted with events will
* be relative to this.
*/
cwd?: string;
/**
* If set to true then the strings passed to .watch() and .add() are treated as literal path
* names, even if they look like globs. Default: false.
*/
disableGlobbing?: boolean;
/**
* Whether to use fs.watchFile (backed by polling), or fs.watch. If polling leads to high CPU
* utilization, consider setting this to `false`. It is typically necessary to **set this to
* `true` to successfully watch files over a network**, and it may be necessary to successfully
* watch files in other non-standard situations. Setting to `true` explicitly on OS X overrides
* the `useFsEvents` default.
*/
usePolling?: boolean;
/**
* Whether to use the `fsevents` watching interface if available. When set to `true` explicitly
* and `fsevents` is available this supercedes the `usePolling` setting. When set to `false` on
* OS X, `usePolling: true` becomes the default.
*/
useFsEvents?: boolean;
/**
* If relying upon the [`fs.Stats`](https://nodejs.org/api/fs.html#fs_class_fs_stats) object that
* may get passed with `add`, `addDir`, and `change` events, set this to `true` to ensure it is
* provided even in cases where it wasn't already available from the underlying watch events.
*/
alwaysStat?: boolean;
/**
* If set, limits how many levels of subdirectories will be traversed.
*/
depth?: number;
/**
* Interval of file system polling.
*/
interval?: number;
/**
* Interval of file system polling for binary files. ([see list of binary extensions](https://gi
* thub.com/sindresorhus/binary-extensions/blob/master/binary-extensions.json))
*/
binaryInterval?: number;
/**
* Indicates whether to watch files that don't have read permissions if possible. If watching
* fails due to `EPERM` or `EACCES` with this set to `true`, the errors will be suppressed
* silently.
*/
ignorePermissionErrors?: boolean;
/**
* `true` if `useFsEvents` and `usePolling` are `false`). Automatically filters out artifacts
* that occur when using editors that use "atomic writes" instead of writing directly to the
* source file. If a file is re-added within 100 ms of being deleted, Chokidar emits a `change`
* event rather than `unlink` then `add`. If the default of 100 ms does not work well for you,
* you can override it by setting `atomic` to a custom value, in milliseconds.
*/
atomic?: boolean | number;
/**
* can be set to an object in order to adjust timing params:
*/
awaitWriteFinish?: AwaitWriteFinishOptions | boolean;
}
export interface AwaitWriteFinishOptions {
/**
* Amount of time in milliseconds for a file size to remain constant before emitting its event.
*/
stabilityThreshold?: number;
/**
* File size polling interval.
*/
pollInterval?: number;
}
/**
* produces an instance of `FSWatcher`.
*/
export function watch(
paths: string | ReadonlyArray<string>,
options?: WatchOptions
): FSWatcher;