Added Gulp.js for compiling SCSS stylesheets

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# Chokidar 2.1.5 (Mar 22, 2019)
* Revert 2.1.3 atomic writing changes.
# Chokidar 2.1.4 (Mar 22, 2019)
* Improve TypeScript type definitions for `on` method.
# Chokidar 2.1.3 (Mar 22, 2019)
* Improve atomic writes handling
# Chokidar 2.1.2 (Feb 18, 2019)
* Add TypeScript type definitions
* More fixes for accessTime behavior (#800)
# Chokidar 2.1.1 (Feb 8, 2019)
* Handle simultaneous change of LastAccessTime and ModifiedTime (#793)
# Chokidar 2.1.0 (Feb 5, 2019)
* Ignore accessTime updates caused by read operations (#762).
* Updated dependencies. Removed `lodash.debounce`.
# Chokidar 2.0.4 (Jun 18, 2018)
* Prevent watcher.close() from crashing (#730).
# Chokidar 2.0.3 (Mar 22, 2018)
* Fixes an issue that using fd = 0 is not closed in case
Windows is used and a `EPERM` error is triggered.
# Chokidar 2.0.2 (Feb 14, 2018)
* Allow semver range updates for upath dependency
# Chokidar 2.0.1 (Feb 8, 2018)
* Fix #668 glob issue on Windows when using `ignore` and `cwd`. Thanks @remy!
* Fix #546 possible uncaught exception when using `awaitWriteFinish`.
Thanks @dsagal!
# Chokidar 2.0.0 (Dec 29, 2017)
* Breaking: Upgrade globbing dependencies which require globs to be more strict and always use POSIX-style slashes because Windows-style slashes are used as escape sequences
* Update tests to work with upgraded globbing dependencies
* Add ability to log FSEvents require error by setting `CHOKIDAR_PRINT_FSEVENTS_REQUIRE_ERROR` env
* Fix for handling braces in globs
* Add node 8 & 9 to CI configs
* Allow node 0.10 failures on Windows
# Chokidar 1.7.0 (May 8, 2017)
* Add `disableGlobbing` option
* Add ability to force interval value by setting CHOKIDAR_INTERVAL env
variable
* Fix issue with `.close()` being called before `ready`
# Chokidar 1.6.0 (Jun 22, 2016)
* Added ability for force `usePolling` mode by setting `CHOKIDAR_USEPOLLING`
env variable
# Chokidar 1.5.2 (Jun 7, 2016)
* Fix missing `addDir` events when using `cwd` and `alwaysStat` options
* Fix missing `add` events for files within a renamed directory
# Chokidar 1.5.1 (May 20, 2016)
* To help prevent exhaustion of FSEvents system limitations, consolidate watch
instances to the common parent upon detection of separate watch instances on
many siblings
# Chokidar 1.5.0 (May 10, 2016)
* Make debounce delay setting used with `atomic: true` user-customizable
* Fixes and improvements to `awaitWriteFinish` features
# Chokidar 1.4.3 (Feb 26, 2016)
* Update async-each dependency to ^1.0.0
# Chokidar 1.4.2 (Dec 30, 2015)
* Now correctly emitting `stats` with `awaitWriteFinish` option.
# Chokidar 1.4.1 (Dec 9, 2015)
* The watcher could now be correctly subclassed with ES6 class syntax.
# Chokidar 1.4.0 (Dec 3, 2015)
* Add `.getWatched()` method, exposing all file system entries being watched
* Apply `awaitWriteFinish` methodology to `change` events (in addition to `add`)
* Fix handling of symlinks within glob paths (#293)
* Fix `addDir` and `unlinkDir` events under globs (#337, #401)
* Fix issues with `.unwatch()` (#374, #403)
# Chokidar 1.3.0 (Nov 18, 2015)
* Improve `awaitWriteFinish` option behavior
* Fix some `cwd` option behavior on Windows
* `awaitWriteFinish` and `cwd` are now compatible
* Fix some race conditions.
* #379: Recreating deleted directory doesn't trigger event
* When adding a previously-deleted file, emit 'add', not 'change'
# Chokidar 1.2.0 (Oct 1, 2015)
* Allow nested arrays of paths to be provided to `.watch()` and `.add()`
* Add `awaitWriteFinish` option
# Chokidar 1.1.0 (Sep 23, 2015)
* Dependency updates including fsevents@1.0.0, improving installation
# Chokidar 1.0.6 (Sep 18, 2015)
* Fix issue with `.unwatch()` method and relative paths
# Chokidar 1.0.5 (Jul 20, 2015)
* Fix regression with regexes/fns using in `ignored`
# Chokidar 1.0.4 (Jul 15, 2015)
* Fix bug with `ignored` files/globs while `cwd` option is set
# Chokidar 1.0.3 (Jun 4, 2015)
* Fix race issue with `alwaysStat` option and removed files
# Chokidar 1.0.2 (May 30, 2015)
* Fix bug with absolute paths and ENAMETOOLONG error
# Chokidar 1.0.1 (Apr 8, 2015)
* Fix bug with `.close()` method in `fs.watch` mode with `persistent: false`
option
# Chokidar 1.0.0 (Apr 7, 2015)
* Glob support! Use globs in `watch`, `add`, and `unwatch` methods
* Comprehensive symlink support
* New `unwatch` method to turn off watching of previously watched paths
* More flexible `ignored` option allowing regex, function, glob, or array
courtesy of [anymatch](https://github.com/es128/anymatch)
* New `cwd` option to set base dir from which relative paths are derived
* New `depth` option for limiting recursion
* New `alwaysStat` option to ensure
[`fs.Stats`](https://nodejs.org/api/fs.html#fs_class_fs_stats) gets passed
with every add/change event
* New `ready` event emitted when initial fs tree scan is done and watcher is
ready for changes
* New `raw` event exposing data and events from the lower-level watch modules
* New `followSymlinks` option to impact whether symlinks' targets or the symlink
files themselves are watched
* New `atomic` option for normalizing artifacts from text editors that use
atomic write methods
* Ensured watcher's stability with lots of bugfixes.
# Chokidar 0.12.6 (Jan 6, 2015)
* Fix bug which breaks `persistent: false` mode when change events occur
# Chokidar 0.12.5 (Dec 17, 2014)
* Fix bug with matching parent path detection for fsevents instance sharing
* Fix bug with ignored watch path in nodefs modes
# Chokidar 0.12.4 (Dec 14, 2014)
* Fix bug in `fs.watch` mode that caused watcher to leak into `cwd`
* Fix bug preventing ready event when there are symlinks to ignored paths
# Chokidar 0.12.3 (Dec 13, 2014)
* Fix handling of special files such as named pipes and sockets
# Chokidar 0.12.2 (Dec 12, 2014)
* Fix recursive symlink handling and some other path resolution problems
# Chokidar 0.12.1 (Dec 10, 2014)
* Fix a case where file symlinks were not followed properly
# Chokidar 0.12.0 (Dec 8, 2014)
* Symlink support
* Add `followSymlinks` option, which defaults to `true`
* Change default watch mode on Linux to non-polling `fs.watch`
* Add `atomic` option to normalize events from editors using atomic writes
* Particularly Vim and Sublime
* Add `raw` event which exposes data from the underlying watch method
# Chokidar 0.11.1 (Nov 19, 2014)
* Fix a bug where an error is thrown when `fs.watch` instantiation fails
# Chokidar 0.11.0 (Nov 16, 2014)
* Add a `ready` event, which is emitted after initial file scan completes
* Fix issue with options keys passed in defined as `undefined`
* Rename some internal `FSWatcher` properties to indicate they're private
# Chokidar 0.10.9 (Nov 15, 2014)
* Fix some leftover issues from adding watcher reuse
# Chokidar 0.10.8 (Nov 14, 2014)
* Remove accidentally committed/published `console.log` statement.
* Sry 'bout that :crying_cat_face:
# Chokidar 0.10.7 (Nov 14, 2014)
* Apply watcher reuse methodology to `fs.watch` and `fs.watchFile` as well
# Chokidar 0.10.6 (Nov 12, 2014)
* More efficient creation/reuse of FSEvents instances to avoid system limits
* Reduce simultaneous FSEvents instances allowed in a process
* Handle errors thrown by `fs.watch` upon invocation
# Chokidar 0.10.5 (Nov 6, 2014)
* Limit number of simultaneous FSEvents instances (fall back to other methods)
* Prevent some cases of EMFILE errors during initialization
* Fix ignored files emitting events in some fsevents-mode circumstances
# Chokidar 0.10.4 (Nov 5, 2014)
* Bump fsevents dependency to ~0.3.1
* Should resolve build warnings and `npm rebuild` on non-Macs
# Chokidar 0.10.3 (Oct 28, 2014)
* Fix removed dir emitting as `unlink` instead of `unlinkDir`
* Fix issues with file changing to dir or vice versa (gh-165)
* Fix handling of `ignored` option in fsevents mode
# Chokidar 0.10.2 (Oct 23, 2014)
* Improve individual file watching
* Fix fsevents keeping process alive when `persistent: false`
# Chokidar 0.10.1 (19 October 2014)
* Improve handling of text editor atomic writes
# Chokidar 0.10.0 (Oct 18, 2014)
* Many stability and consistency improvements
* Resolve many cases of duplicate or wrong events
* Correct for fsevents inconsistencies
* Standardize handling of errors and relative paths
* Fix issues with watching `./`
# Chokidar 0.9.0 (Sep 25, 2014)
* Updated fsevents to 0.3
* Update per-system defaults
* Fix issues with closing chokidar instance
* Fix duplicate change events on win32
# Chokidar 0.8.2 (Mar 26, 2014)
* Fixed npm issues related to fsevents dep.
* Updated fsevents to 0.2.
# Chokidar 0.8.1 (Dec 16, 2013)
* Optional deps are now truly optional on windows and
linux.
* Rewritten in JS, again.
* Fixed some FSEvents-related bugs.
# Chokidar 0.8.0 (Nov 29, 2013)
* Added ultra-fast low-CPU OS X file watching with FSEvents.
It is enabled by default.
* Added `addDir` and `unlinkDir` events.
* Polling is now disabled by default on all platforms.
# Chokidar 0.7.1 (Nov 18, 2013)
* `Watcher#close` now also removes all event listeners.
# Chokidar 0.7.0 (Oct 22, 2013)
* When `options.ignored` is two-argument function, it will
also be called after stating the FS, with `stats` argument.
* `unlink` is no longer emitted on directories.
# Chokidar 0.6.3 (Aug 12, 2013)
* Added `usePolling` option (default: `true`).
When `false`, chokidar will use `fs.watch` as backend.
`fs.watch` is much faster, but not like super reliable.
# Chokidar 0.6.2 (Mar 19, 2013)
* Fixed watching initially empty directories with `ignoreInitial` option.
# Chokidar 0.6.1 (Mar 19, 2013)
* Added node.js 0.10 support.
# Chokidar 0.6.0 (Mar 10, 2013)
* File attributes (stat()) are now passed to `add` and `change` events as second
arguments.
* Changed default polling interval for binary files to 300ms.
# Chokidar 0.5.3 (Jan 13, 2013)
* Removed emitting of `change` events before `unlink`.
# Chokidar 0.5.2 (Jan 13, 2013)
* Removed postinstall script to prevent various npm bugs.
# Chokidar 0.5.1 (Jan 6, 2013)
* When starting to watch non-existing paths, chokidar will no longer throw
ENOENT error.
* Fixed bug with absolute path.
# Chokidar 0.5.0 (Dec 9, 2012)
* Added a bunch of new options:
* `ignoreInitial` that allows to ignore initial `add` events.
* `ignorePermissionErrors` that allows to ignore ENOENT etc perm errors.
* `interval` and `binaryInterval` that allow to change default
fs polling intervals.
# Chokidar 0.4.0 (Jul 26, 2012)
* Added `all` event that receives two args (event name and path) that combines
`add`, `change` and `unlink` events.
* Switched to `fs.watchFile` on node.js 0.8 on windows.
* Files are now correctly unwatched after unlink.
# Chokidar 0.3.0 (Jun 24, 2012)
* `unlink` event are no longer emitted for directories, for consistency with
`add`.
# Chokidar 0.2.6 (Jun 8, 2012)
* Prevented creating of duplicate 'add' events.
# Chokidar 0.2.5 (Jun 8, 2012)
* Fixed a bug when new files in new directories hadn't been added.
# Chokidar 0.2.4 (Jun 7, 2012)
* Fixed a bug when unlinked files emitted events after unlink.
# Chokidar 0.2.3 (May 12, 2012)
* Fixed watching of files on windows.
# Chokidar 0.2.2 (May 4, 2012)
* Fixed watcher signature.
# Chokidar 0.2.1 (May 4, 2012)
* Fixed invalid API bug when using `watch()`.
# Chokidar 0.2.0 (May 4, 2012)
* Rewritten in js.
# Chokidar 0.1.1 (Apr 26, 2012)
* Changed api to `chokidar.watch()`.
* Fixed compilation on windows.
# Chokidar 0.1.0 (Apr 20, 2012)
* Initial release, extracted from
[Brunch](https://github.com/brunch/brunch/blob/9847a065aea300da99bd0753f90354cde9de1261/src/helpers.coffee#L66)

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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) [![Mac/Linux Build Status](https://img.shields.io/travis/paulmillr/chokidar/master.svg?label=Mac%20OSX%20%26%20Linux)](https://travis-ci.org/paulmillr/chokidar) [![Windows Build status](https://img.shields.io/appveyor/ci/paulmillr/chokidar/master.svg?label=Windows)](https://ci.appveyor.com/project/paulmillr/chokidar/branch/master) [![Coverage Status](https://coveralls.io/repos/paulmillr/chokidar/badge.svg)](https://coveralls.io/r/paulmillr/chokidar)
> A neat wrapper around node.js fs.watch / fs.watchFile / FSEvents.
[![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`.
* Has [a lot of other issues](https://github.com/nodejs/node/search?q=fs.watch&type=Issues)
* Does not provide an easy way to recursively watch file trees.
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](http://brunch.io)** (an ultra-swift web app build tool), it is now used in
[gulp](https://github.com/gulpjs/gulp/),
[karma](http://karma-runner.github.io),
[PM2](https://github.com/Unitech/PM2),
[browserify](http://browserify.org/),
[webpack](http://webpack.github.io/),
[BrowserSync](http://www.browsersync.io/),
[Microsoft's Visual Studio Code](https://github.com/microsoft/vscode),
and [many others](https://www.npmjs.org/browse/depended/chokidar/).
It has proven itself in production environments.
## 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 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
var chokidar = require('chokidar');
// One-liner for current directory, ignores .dotfiles
chokidar.watch('.', {ignored: /(^|[\/\\])\../}).on('all', (event, path) => {
console.log(event, path);
});
```
```javascript
// Example of a more typical implementation structure:
// Initialize watcher.
var watcher = chokidar.watch('file, dir, glob, or array', {
ignored: /(^|[\/\\])\../,
persistent: true
});
// Something to use when events are received.
var 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) => {
log('Raw event info:', event, path, details);
});
// 'add', 'addDir' and 'change' events also receive stat() results as second
// argument when available: http://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.
watcher.unwatch('new-file*');
// Stop watching.
watcher.close();
// 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: true,
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)
});
```
## API
`chokidar.watch(paths, [options])`
* `paths` (string or array of strings). Paths to files, dirs to be watched
recursively, or glob patterns.
* `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`](http://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. 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`](http://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.
#### 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`.
* `.unwatch(path / paths)`: Stop watching files, directories, or glob patterns.
Takes an array of strings or just one string.
* `.close()`: Removes all listeners from watched files.
* `.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/kimmobrunfeldt/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.
* `ERR! stack Error: Python executable "python" is v3.4.1, which is not supported by gyp.`
* You should be able to resolve this by installing python 2.7 and running:
`npm config set python python2.7`
* `gyp ERR! stack Error: not found: make`
* On Mac, install the XCode command-line tools
## License
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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'use strict';
var EventEmitter = require('events').EventEmitter;
var fs = require('fs');
var sysPath = require('path');
var asyncEach = require('async-each');
var anymatch = require('anymatch');
var globParent = require('glob-parent');
var isGlob = require('is-glob');
var isAbsolute = require('path-is-absolute');
var inherits = require('inherits');
var braces = require('braces');
var normalizePath = require('normalize-path');
var upath = require('upath');
var NodeFsHandler = require('./lib/nodefs-handler');
var FsEventsHandler = require('./lib/fsevents-handler');
var arrify = function(value) {
if (value == null) return [];
return Array.isArray(value) ? value : [value];
};
var flatten = function(list, result) {
if (result == null) result = [];
list.forEach(function(item) {
if (Array.isArray(item)) {
flatten(item, result);
} else {
result.push(item);
}
});
return result;
};
// Little isString util for use in Array#every.
var isString = function(thing) {
return typeof thing === 'string';
};
// Public: Main class.
// Watches files & directories for changes.
//
// * _opts - object, chokidar options hash
//
// Emitted events:
// `add`, `addDir`, `change`, `unlink`, `unlinkDir`, `all`, `error`
//
// Examples
//
// var watcher = new FSWatcher()
// .add(directories)
// .on('add', path => console.log('File', path, 'was added'))
// .on('change', path => console.log('File', path, 'was changed'))
// .on('unlink', path => console.log('File', path, 'was removed'))
// .on('all', (event, path) => console.log(path, ' emitted ', event))
//
function FSWatcher(_opts) {
EventEmitter.call(this);
var opts = {};
// in case _opts that is passed in is a frozen object
if (_opts) for (var opt in _opts) opts[opt] = _opts[opt];
this._watched = Object.create(null);
this._closers = Object.create(null);
this._ignoredPaths = Object.create(null);
Object.defineProperty(this, '_globIgnored', {
get: function() { return Object.keys(this._ignoredPaths); }
});
this.closed = false;
this._throttled = Object.create(null);
this._symlinkPaths = Object.create(null);
function undef(key) {
return opts[key] === undefined;
}
// Set up default options.
if (undef('persistent')) opts.persistent = true;
if (undef('ignoreInitial')) opts.ignoreInitial = false;
if (undef('ignorePermissionErrors')) opts.ignorePermissionErrors = false;
if (undef('interval')) opts.interval = 100;
if (undef('binaryInterval')) opts.binaryInterval = 300;
if (undef('disableGlobbing')) opts.disableGlobbing = false;
this.enableBinaryInterval = opts.binaryInterval !== opts.interval;
// Enable fsevents on OS X when polling isn't explicitly enabled.
if (undef('useFsEvents')) opts.useFsEvents = !opts.usePolling;
// If we can't use fsevents, ensure the options reflect it's disabled.
if (!FsEventsHandler.canUse()) opts.useFsEvents = false;
// Use polling on Mac if not using fsevents.
// Other platforms use non-polling fs.watch.
if (undef('usePolling') && !opts.useFsEvents) {
opts.usePolling = process.platform === 'darwin';
}
// Global override (useful for end-developers that need to force polling for all
// instances of chokidar, regardless of usage/dependency depth)
var envPoll = process.env.CHOKIDAR_USEPOLLING;
if (envPoll !== undefined) {
var envLower = envPoll.toLowerCase();
if (envLower === 'false' || envLower === '0') {
opts.usePolling = false;
} else if (envLower === 'true' || envLower === '1') {
opts.usePolling = true;
} else {
opts.usePolling = !!envLower
}
}
var envInterval = process.env.CHOKIDAR_INTERVAL;
if (envInterval) {
opts.interval = parseInt(envInterval);
}
// Editor atomic write normalization enabled by default with fs.watch
if (undef('atomic')) opts.atomic = !opts.usePolling && !opts.useFsEvents;
if (opts.atomic) this._pendingUnlinks = Object.create(null);
if (undef('followSymlinks')) opts.followSymlinks = true;
if (undef('awaitWriteFinish')) opts.awaitWriteFinish = false;
if (opts.awaitWriteFinish === true) opts.awaitWriteFinish = {};
var awf = opts.awaitWriteFinish;
if (awf) {
if (!awf.stabilityThreshold) awf.stabilityThreshold = 2000;
if (!awf.pollInterval) awf.pollInterval = 100;
this._pendingWrites = Object.create(null);
}
if (opts.ignored) opts.ignored = arrify(opts.ignored);
this._isntIgnored = function(path, stat) {
return !this._isIgnored(path, stat);
}.bind(this);
var readyCalls = 0;
this._emitReady = function() {
if (++readyCalls >= this._readyCount) {
this._emitReady = Function.prototype;
this._readyEmitted = true;
// use process.nextTick to allow time for listener to be bound
process.nextTick(this.emit.bind(this, 'ready'));
}
}.bind(this);
this.options = opts;
// Youre frozen when your hearts not open.
Object.freeze(opts);
}
inherits(FSWatcher, EventEmitter);
// Common helpers
// --------------
// Private method: Normalize and emit events
//
// * event - string, type of event
// * path - string, file or directory path
// * val[1..3] - arguments to be passed with event
//
// Returns the error if defined, otherwise the value of the
// FSWatcher instance's `closed` flag
FSWatcher.prototype._emit = function(event, path, val1, val2, val3) {
if (this.options.cwd) path = sysPath.relative(this.options.cwd, path);
var 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);
var awf = this.options.awaitWriteFinish;
if (awf && this._pendingWrites[path]) {
this._pendingWrites[path].lastChange = new Date();
return this;
}
if (this.options.atomic) {
if (event === 'unlink') {
this._pendingUnlinks[path] = args;
setTimeout(function() {
Object.keys(this._pendingUnlinks).forEach(function(path) {
this.emit.apply(this, this._pendingUnlinks[path]);
this.emit.apply(this, ['all'].concat(this._pendingUnlinks[path]));
delete this._pendingUnlinks[path];
}.bind(this));
}.bind(this), typeof this.options.atomic === "number"
? this.options.atomic
: 100);
return this;
} else if (event === 'add' && this._pendingUnlinks[path]) {
event = args[0] = 'change';
delete this._pendingUnlinks[path];
}
}
var emitEvent = function() {
this.emit.apply(this, args);
if (event !== 'error') this.emit.apply(this, ['all'].concat(args));
}.bind(this);
if (awf && (event === 'add' || event === 'change') && this._readyEmitted) {
var awfEmit = function(err, stats) {
if (err) {
event = args[0] = 'error';
args[1] = err;
emitEvent();
} 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);
}
emitEvent();
}
};
this._awaitWriteFinish(path, awf.stabilityThreshold, event, awfEmit);
return this;
}
if (event === 'change') {
if (!this._throttle('change', path, 50)) return this;
}
if (
this.options.alwaysStat && val1 === undefined &&
(event === 'add' || event === 'addDir' || event === 'change')
) {
var fullPath = this.options.cwd ? sysPath.join(this.options.cwd, path) : path;
fs.stat(fullPath, function(error, stats) {
// Suppress event when fs.stat fails, to avoid sending undefined 'stat'
if (error || !stats) return;
args.push(stats);
emitEvent();
});
} else {
emitEvent();
}
return this;
};
// Private method: Common handler for errors
//
// * error - object, Error instance
//
// Returns the error if defined, otherwise the value of the
// FSWatcher instance's `closed` flag
FSWatcher.prototype._handleError = function(error) {
var code = error && error.code;
var ipe = this.options.ignorePermissionErrors;
if (error &&
code !== 'ENOENT' &&
code !== 'ENOTDIR' &&
(!ipe || (code !== 'EPERM' && code !== 'EACCES'))
) this.emit('error', error);
return error || this.closed;
};
// Private method: Helper utility for throttling
//
// * action - string, type of action being throttled
// * path - string, path being acted upon
// * timeout - int, duration of time to suppress duplicate actions
//
// Returns throttle tracking object or false if action should be suppressed
FSWatcher.prototype._throttle = function(action, path, timeout) {
if (!(action in this._throttled)) {
this._throttled[action] = Object.create(null);
}
var throttled = this._throttled[action];
if (path in throttled) {
throttled[path].count++;
return false;
}
function clear() {
var count = throttled[path] ? throttled[path].count : 0;
delete throttled[path];
clearTimeout(timeoutObject);
return count;
}
var timeoutObject = setTimeout(clear, timeout);
throttled[path] = {timeoutObject: timeoutObject, clear: clear, count: 0};
return throttled[path];
};
// Private method: Awaits write operation to finish
//
// * path - string, path being acted upon
// * threshold - int, time in milliseconds a file size must be fixed before
// acknowledging write operation is finished
// * awfEmit - function, to be called when ready for event to be emitted
// Polls a newly created file for size variations. When files size does not
// change for 'threshold' milliseconds calls callback.
FSWatcher.prototype._awaitWriteFinish = function(path, threshold, event, awfEmit) {
var timeoutHandler;
var fullPath = path;
if (this.options.cwd && !isAbsolute(path)) {
fullPath = sysPath.join(this.options.cwd, path);
}
var now = new Date();
var awaitWriteFinish = (function (prevStat) {
fs.stat(fullPath, function(err, curStat) {
if (err || !(path in this._pendingWrites)) {
if (err && err.code !== 'ENOENT') awfEmit(err);
return;
}
var now = new Date();
if (prevStat && curStat.size != prevStat.size) {
this._pendingWrites[path].lastChange = now;
}
if (now - this._pendingWrites[path].lastChange >= threshold) {
delete this._pendingWrites[path];
awfEmit(null, curStat);
} else {
timeoutHandler = setTimeout(
awaitWriteFinish.bind(this, curStat),
this.options.awaitWriteFinish.pollInterval
);
}
}.bind(this));
}.bind(this));
if (!(path in this._pendingWrites)) {
this._pendingWrites[path] = {
lastChange: now,
cancelWait: function() {
delete this._pendingWrites[path];
clearTimeout(timeoutHandler);
return event;
}.bind(this)
};
timeoutHandler = setTimeout(
awaitWriteFinish.bind(this),
this.options.awaitWriteFinish.pollInterval
);
}
};
// Private method: Determines whether user has asked to ignore this path
//
// * path - string, path to file or directory
// * stats - object, result of fs.stat
//
// Returns boolean
var dotRe = /\..*\.(sw[px])$|\~$|\.subl.*\.tmp/;
FSWatcher.prototype._isIgnored = function(path, stats) {
if (this.options.atomic && dotRe.test(path)) return true;
if (!this._userIgnored) {
var cwd = this.options.cwd;
var ignored = this.options.ignored;
if (cwd && ignored) {
ignored = ignored.map(function (path) {
if (typeof path !== 'string') return path;
return upath.normalize(isAbsolute(path) ? path : sysPath.join(cwd, path));
});
}
var paths = arrify(ignored)
.filter(function(path) {
return typeof path === 'string' && !isGlob(path);
}).map(function(path) {
return path + '/**';
});
this._userIgnored = anymatch(
this._globIgnored.concat(ignored).concat(paths)
);
}
return this._userIgnored([path, stats]);
};
// Private method: Provides a set of common helpers and properties relating to
// symlink and glob handling
//
// * path - string, file, directory, or glob pattern being watched
// * depth - int, at any depth > 0, this isn't a glob
//
// Returns object containing helpers for this path
var replacerRe = /^\.[\/\\]/;
FSWatcher.prototype._getWatchHelpers = function(path, depth) {
path = path.replace(replacerRe, '');
var watchPath = depth || this.options.disableGlobbing || !isGlob(path) ? path : globParent(path);
var fullWatchPath = sysPath.resolve(watchPath);
var hasGlob = watchPath !== path;
var globFilter = hasGlob ? anymatch(path) : false;
var follow = this.options.followSymlinks;
var globSymlink = hasGlob && follow ? null : false;
var checkGlobSymlink = function(entry) {
// only need to resolve once
// first entry should always have entry.parentDir === ''
if (globSymlink == null) {
globSymlink = entry.fullParentDir === fullWatchPath ? false : {
realPath: entry.fullParentDir,
linkPath: fullWatchPath
};
}
if (globSymlink) {
return entry.fullPath.replace(globSymlink.realPath, globSymlink.linkPath);
}
return entry.fullPath;
};
var entryPath = function(entry) {
return sysPath.join(watchPath,
sysPath.relative(watchPath, checkGlobSymlink(entry))
);
};
var filterPath = function(entry) {
if (entry.stat && entry.stat.isSymbolicLink()) return filterDir(entry);
var resolvedPath = entryPath(entry);
return (!hasGlob || globFilter(resolvedPath)) &&
this._isntIgnored(resolvedPath, entry.stat) &&
(this.options.ignorePermissionErrors ||
this._hasReadPermissions(entry.stat));
}.bind(this);
var getDirParts = function(path) {
if (!hasGlob) return false;
var parts = [];
var expandedPath = braces.expand(path);
expandedPath.forEach(function(path) {
parts.push(sysPath.relative(watchPath, path).split(/[\/\\]/));
});
return parts;
};
var dirParts = getDirParts(path);
if (dirParts) {
dirParts.forEach(function(parts) {
if (parts.length > 1) parts.pop();
});
}
var unmatchedGlob;
var filterDir = function(entry) {
if (hasGlob) {
var entryParts = getDirParts(checkGlobSymlink(entry));
var globstar = false;
unmatchedGlob = !dirParts.some(function(parts) {
return parts.every(function(part, i) {
if (part === '**') globstar = true;
return globstar || !entryParts[0][i] || anymatch(part, entryParts[0][i]);
});
});
}
return !unmatchedGlob && this._isntIgnored(entryPath(entry), entry.stat);
}.bind(this);
return {
followSymlinks: follow,
statMethod: follow ? 'stat' : 'lstat',
path: path,
watchPath: watchPath,
entryPath: entryPath,
hasGlob: hasGlob,
globFilter: globFilter,
filterPath: filterPath,
filterDir: filterDir
};
};
// Directory helpers
// -----------------
// Private method: Provides directory tracking objects
//
// * directory - string, path of the directory
//
// Returns the directory's tracking object
FSWatcher.prototype._getWatchedDir = function(directory) {
var dir = sysPath.resolve(directory);
var watcherRemove = this._remove.bind(this);
if (!(dir in this._watched)) this._watched[dir] = {
_items: Object.create(null),
add: function(item) {
if (item !== '.' && item !== '..') this._items[item] = true;
},
remove: function(item) {
delete this._items[item];
if (!this.children().length) {
fs.readdir(dir, function(err) {
if (err) watcherRemove(sysPath.dirname(dir), sysPath.basename(dir));
});
}
},
has: function(item) {return item in this._items;},
children: function() {return Object.keys(this._items);}
};
return this._watched[dir];
};
// File helpers
// ------------
// Private method: Check for read permissions
// Based on this answer on SO: http://stackoverflow.com/a/11781404/1358405
//
// * stats - object, result of fs.stat
//
// Returns boolean
FSWatcher.prototype._hasReadPermissions = function(stats) {
return Boolean(4 & parseInt(((stats && stats.mode) & 0x1ff).toString(8)[0], 10));
};
// Private method: Handles emitting unlink events for
// files and directories, and via recursion, for
// files and directories within directories that are unlinked
//
// * directory - string, directory within which the following item is located
// * item - string, base path of item/directory
//
// Returns nothing
FSWatcher.prototype._remove = function(directory, item) {
// 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
var path = sysPath.join(directory, item);
var fullPath = sysPath.resolve(path);
var isDirectory = this._watched[path] || this._watched[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
var watchedDirs = Object.keys(this._watched);
if (!isDirectory && !this.options.useFsEvents && watchedDirs.length === 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
var nestedDirectoryChildren = this._getWatchedDir(path).children();
// Recursively remove children directories / files.
nestedDirectoryChildren.forEach(function(nestedItem) {
this._remove(path, nestedItem);
}, this);
// Check if item was on the watched list and remove it
var parent = this._getWatchedDir(directory);
var wasTracked = parent.has(item);
parent.remove(item);
// If we wait for this file to be fully written, cancel the wait.
var relPath = path;
if (this.options.cwd) relPath = sysPath.relative(this.options.cwd, path);
if (this.options.awaitWriteFinish && this._pendingWrites[relPath]) {
var event = this._pendingWrites[relPath].cancelWait();
if (event === '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
delete this._watched[path];
delete this._watched[fullPath];
var eventName = isDirectory ? 'unlinkDir' : '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);
}
};
FSWatcher.prototype._closePath = function(path) {
if (!this._closers[path]) return;
this._closers[path].forEach(function(closer) {
closer();
});
delete this._closers[path];
this._getWatchedDir(sysPath.dirname(path)).remove(sysPath.basename(path));
}
// Public method: Adds paths to be watched on an existing FSWatcher instance
// * paths - string or array of strings, file/directory paths and/or globs
// * _origAdd - private boolean, for handling non-existent paths to be watched
// * _internal - private boolean, indicates a non-user add
// Returns an instance of FSWatcher for chaining.
FSWatcher.prototype.add = function(paths, _origAdd, _internal) {
var disableGlobbing = this.options.disableGlobbing;
var cwd = this.options.cwd;
this.closed = false;
paths = flatten(arrify(paths));
if (!paths.every(isString)) {
throw new TypeError('Non-string provided as watch path: ' + paths);
}
if (cwd) paths = paths.map(function(path) {
var absPath;
if (isAbsolute(path)) {
absPath = path;
} else if (path[0] === '!') {
absPath = '!' + sysPath.join(cwd, path.substring(1));
} else {
absPath = sysPath.join(cwd, path);
}
// Check `path` instead of `absPath` because the cwd portion can't be a glob
if (disableGlobbing || !isGlob(path)) {
return absPath;
} else {
return normalizePath(absPath);
}
});
// set aside negated glob strings
paths = paths.filter(function(path) {
if (path[0] === '!') {
this._ignoredPaths[path.substring(1)] = true;
} else {
// if a path is being added that was previously ignored, stop ignoring it
delete this._ignoredPaths[path];
delete this._ignoredPaths[path + '/**'];
// reset the cached userIgnored anymatch fn
// to make ignoredPaths changes effective
this._userIgnored = null;
return true;
}
}, this);
if (this.options.useFsEvents && FsEventsHandler.canUse()) {
if (!this._readyCount) this._readyCount = paths.length;
if (this.options.persistent) this._readyCount *= 2;
paths.forEach(this._addToFsEvents, this);
} else {
if (!this._readyCount) this._readyCount = 0;
this._readyCount += paths.length;
asyncEach(paths, function(path, next) {
this._addToNodeFs(path, !_internal, 0, 0, _origAdd, function(err, res) {
if (res) this._emitReady();
next(err, res);
}.bind(this));
}.bind(this), function(error, results) {
results.forEach(function(item) {
if (!item || this.closed) return;
this.add(sysPath.dirname(item), sysPath.basename(_origAdd || item));
}, this);
}.bind(this));
}
return this;
};
// Public method: Close watchers or start ignoring events from specified paths.
// * paths - string or array of strings, file/directory paths and/or globs
// Returns instance of FSWatcher for chaining.
FSWatcher.prototype.unwatch = function(paths) {
if (this.closed) return this;
paths = flatten(arrify(paths));
paths.forEach(function(path) {
// convert to absolute path unless relative path already matches
if (!isAbsolute(path) && !this._closers[path]) {
if (this.options.cwd) path = sysPath.join(this.options.cwd, path);
path = sysPath.resolve(path);
}
this._closePath(path);
this._ignoredPaths[path] = true;
if (path in this._watched) {
this._ignoredPaths[path + '/**'] = true;
}
// reset the cached userIgnored anymatch fn
// to make ignoredPaths changes effective
this._userIgnored = null;
}, this);
return this;
};
// Public method: Close watchers and remove all listeners from watched paths.
// Returns instance of FSWatcher for chaining.
FSWatcher.prototype.close = function() {
if (this.closed) return this;
this.closed = true;
Object.keys(this._closers).forEach(function(watchPath) {
this._closers[watchPath].forEach(function(closer) {
closer();
});
delete this._closers[watchPath];
}, this);
this._watched = Object.create(null);
this.removeAllListeners();
return this;
};
// Public method: Expose list of watched paths
// Returns object w/ dir paths as keys and arrays of contained paths as values.
FSWatcher.prototype.getWatched = function() {
var watchList = {};
Object.keys(this._watched).forEach(function(dir) {
var key = this.options.cwd ? sysPath.relative(this.options.cwd, dir) : dir;
watchList[key || '.'] = Object.keys(this._watched[dir]._items).sort();
}.bind(this));
return watchList;
};
// Attach watch handler prototype methods
function importHandler(handler) {
Object.keys(handler.prototype).forEach(function(method) {
FSWatcher.prototype[method] = handler.prototype[method];
});
}
importHandler(NodeFsHandler);
if (FsEventsHandler.canUse()) importHandler(FsEventsHandler);
// Export FSWatcher class
exports.FSWatcher = FSWatcher;
// Public function: Instantiates watcher with paths to be tracked.
// * paths - string or array of strings, file/directory paths and/or globs
// * options - object, chokidar options
// Returns an instance of FSWatcher for chaining.
exports.watch = function(paths, options) {
return new FSWatcher(options).add(paths);
};

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node_modules/chokidar/lib/fsevents-handler.js generated vendored Normal file
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'use strict';
var fs = require('fs');
var sysPath = require('path');
var readdirp = require('readdirp');
var fsevents;
try { fsevents = require('fsevents'); } catch (error) {
if (process.env.CHOKIDAR_PRINT_FSEVENTS_REQUIRE_ERROR) console.error(error)
}
// fsevents instance helper functions
// object to hold per-process fsevents instances
// (may be shared across chokidar FSWatcher instances)
var FSEventsWatchers = Object.create(null);
// Threshold of duplicate path prefixes at which to start
// consolidating going forward
var consolidateThreshhold = 10;
// Private function: Instantiates the fsevents interface
// * path - string, path to be watched
// * callback - function, called when fsevents is bound and ready
// Returns new fsevents instance
function createFSEventsInstance(path, callback) {
return (new fsevents(path)).on('fsevent', callback).start();
}
// Private function: Instantiates the fsevents interface or binds listeners
// to an existing one covering the same file tree
// * path - string, path to be watched
// * realPath - string, real path (in case of symlinks)
// * listener - function, called when fsevents emits events
// * rawEmitter - function, passes data to listeners of the 'raw' event
// Returns close function
function setFSEventsListener(path, realPath, listener, rawEmitter) {
var watchPath = sysPath.extname(path) ? sysPath.dirname(path) : path;
var watchContainer;
var parentPath = sysPath.dirname(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;
}
var resolvedPath = sysPath.resolve(path);
var hasSymlink = resolvedPath !== realPath;
function filteredListener(fullPath, flags, info) {
if (hasSymlink) fullPath = fullPath.replace(realPath, resolvedPath);
if (
fullPath === resolvedPath ||
!fullPath.indexOf(resolvedPath + sysPath.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
function watchedParent() {
return Object.keys(FSEventsWatchers).some(function(watchedPath) {
// condition is met when indexOf returns 0
if (!realPath.indexOf(sysPath.resolve(watchedPath) + sysPath.sep)) {
watchPath = watchedPath;
return true;
}
});
}
if (watchPath in FSEventsWatchers || watchedParent()) {
watchContainer = FSEventsWatchers[watchPath];
watchContainer.listeners.push(filteredListener);
} else {
watchContainer = FSEventsWatchers[watchPath] = {
listeners: [filteredListener],
rawEmitters: [rawEmitter],
watcher: createFSEventsInstance(watchPath, function(fullPath, flags) {
var info = fsevents.getInfo(fullPath, flags);
watchContainer.listeners.forEach(function(listener) {
listener(fullPath, flags, info);
});
watchContainer.rawEmitters.forEach(function(emitter) {
emitter(info.event, fullPath, info);
});
})
};
}
var listenerIndex = watchContainer.listeners.length - 1;
// removes this instance's listeners and closes the underlying fsevents
// instance if there are no more listeners left
return function close() {
delete watchContainer.listeners[listenerIndex];
delete watchContainer.rawEmitters[listenerIndex];
if (!Object.keys(watchContainer.listeners).length) {
watchContainer.watcher.stop();
delete FSEventsWatchers[watchPath];
}
};
}
// Decide whether or not we should start a new higher-level
// parent watcher
function couldConsolidate(path) {
var keys = Object.keys(FSEventsWatchers);
var count = 0;
for (var i = 0, len = keys.length; i < len; ++i) {
var watchPath = keys[i];
if (watchPath.indexOf(path) === 0) {
count++;
if (count >= consolidateThreshhold) {
return true;
}
}
}
return false;
}
function isConstructor(obj) {
return obj.prototype !== undefined && obj.prototype.constructor !== undefined;
}
// returns boolean indicating whether fsevents can be used
function canUse() {
return fsevents && Object.keys(FSEventsWatchers).length < 128 && isConstructor(fsevents);
}
// determines subdirectory traversal levels from root to path
function depth(path, root) {
var i = 0;
while (!path.indexOf(root) && (path = sysPath.dirname(path)) !== root) i++;
return i;
}
// fake constructor for attaching fsevents-specific prototype methods that
// will be copied to FSWatcher's prototype
function FsEventsHandler() {}
// Private method: Handle symlinks encountered during directory scan
// * watchPath - string, file/dir path to be watched with fsevents
// * realPath - string, real path (in case of symlinks)
// * transform - function, path transformer
// * globFilter - function, path filter in case a glob pattern was provided
// Returns close function for the watcher instance
FsEventsHandler.prototype._watchWithFsEvents =
function(watchPath, realPath, transform, globFilter) {
if (this._isIgnored(watchPath)) return;
var watchCallback = function(fullPath, flags, info) {
if (
this.options.depth !== undefined &&
depth(fullPath, realPath) > this.options.depth
) return;
var path = transform(sysPath.join(
watchPath, sysPath.relative(watchPath, fullPath)
));
if (globFilter && !globFilter(path)) return;
// ensure directories are tracked
var parent = sysPath.dirname(path);
var item = sysPath.basename(path);
var watchedDir = this._getWatchedDir(
info.type === 'directory' ? path : parent
);
var checkIgnored = function(stats) {
if (this._isIgnored(path, stats)) {
this._ignoredPaths[path] = true;
if (stats && stats.isDirectory()) {
this._ignoredPaths[path + '/**/*'] = true;
}
return true;
} else {
delete this._ignoredPaths[path];
delete this._ignoredPaths[path + '/**/*'];
}
}.bind(this);
var handleEvent = function(event) {
if (checkIgnored()) return;
if (event === 'unlink') {
// suppress unlink events on never before seen files
if (info.type === 'directory' || watchedDir.has(item)) {
this._remove(parent, item);
}
} else {
if (event === 'add') {
// track new directories
if (info.type === 'directory') this._getWatchedDir(path);
if (info.type === 'symlink' && this.options.followSymlinks) {
// push symlinks back to the top of the stack to get handled
var curDepth = this.options.depth === undefined ?
undefined : depth(fullPath, realPath) + 1;
return this._addToFsEvents(path, false, true, curDepth);
} else {
// track new paths
// (other than symlinks being followed, which will be tracked soon)
this._getWatchedDir(parent).add(item);
}
}
var eventName = info.type === 'directory' ? event + 'Dir' : event;
this._emit(eventName, path);
if (eventName === 'addDir') this._addToFsEvents(path, false, true);
}
}.bind(this);
function addOrChange() {
handleEvent(watchedDir.has(item) ? 'change' : 'add');
}
function checkFd() {
fs.open(path, 'r', function(error, fd) {
if (error) {
error.code !== 'EACCES' ?
handleEvent('unlink') : addOrChange();
} else {
fs.close(fd, function(err) {
err && err.code !== 'EACCES' ?
handleEvent('unlink') : addOrChange();
});
}
});
}
// correct for wrong events emitted
var wrongEventFlags = [
69888, 70400, 71424, 72704, 73472, 131328, 131840, 262912
];
if (wrongEventFlags.indexOf(flags) !== -1 || info.event === 'unknown') {
if (typeof this.options.ignored === 'function') {
fs.stat(path, function(error, stats) {
if (checkIgnored(stats)) return;
stats ? addOrChange() : handleEvent('unlink');
});
} else {
checkFd();
}
} else {
switch (info.event) {
case 'created':
case 'modified':
return addOrChange();
case 'deleted':
case 'moved':
return checkFd();
}
}
}.bind(this);
var closer = setFSEventsListener(
watchPath,
realPath,
watchCallback,
this.emit.bind(this, 'raw')
);
this._emitReady();
return closer;
};
// Private method: Handle symlinks encountered during directory scan
// * linkPath - string, path to symlink
// * fullPath - string, absolute path to the symlink
// * transform - function, pre-existing path transformer
// * curDepth - int, level of subdirectories traversed to where symlink is
// Returns nothing
FsEventsHandler.prototype._handleFsEventsSymlink =
function(linkPath, fullPath, transform, curDepth) {
// don't follow the same symlink more than once
if (this._symlinkPaths[fullPath]) return;
else this._symlinkPaths[fullPath] = true;
this._readyCount++;
fs.realpath(linkPath, function(error, linkTarget) {
if (this._handleError(error) || this._isIgnored(linkTarget)) {
return this._emitReady();
}
this._readyCount++;
// add the linkTarget for watching with a wrapper for transform
// that causes emitted paths to incorporate the link's path
this._addToFsEvents(linkTarget || linkPath, function(path) {
var dotSlash = '.' + sysPath.sep;
var aliasedPath = linkPath;
if (linkTarget && linkTarget !== dotSlash) {
aliasedPath = path.replace(linkTarget, linkPath);
} else if (path !== dotSlash) {
aliasedPath = sysPath.join(linkPath, path);
}
return transform(aliasedPath);
}, false, curDepth);
}.bind(this));
};
// Private method: Handle added path with fsevents
// * path - string, file/directory path or glob pattern
// * transform - function, converts working path to what the user expects
// * forceAdd - boolean, ensure add is emitted
// * priorDepth - int, level of subdirectories already traversed
// Returns nothing
FsEventsHandler.prototype._addToFsEvents =
function(path, transform, forceAdd, priorDepth) {
// applies transform if provided, otherwise returns same value
var processPath = typeof transform === 'function' ?
transform : function(val) { return val; };
var emitAdd = function(newPath, stats) {
var pp = processPath(newPath);
var isDir = stats.isDirectory();
var dirObj = this._getWatchedDir(sysPath.dirname(pp));
var base = sysPath.basename(pp);
// ensure empty dirs get tracked
if (isDir) this._getWatchedDir(pp);
if (dirObj.has(base)) return;
dirObj.add(base);
if (!this.options.ignoreInitial || forceAdd === true) {
this._emit(isDir ? 'addDir' : 'add', pp, stats);
}
}.bind(this);
var wh = this._getWatchHelpers(path);
// evaluate what is at the path we're being asked to watch
fs[wh.statMethod](wh.watchPath, function(error, stats) {
if (this._handleError(error) || this._isIgnored(wh.watchPath, stats)) {
this._emitReady();
return this._emitReady();
}
if (stats.isDirectory()) {
// emit addDir unless this is a glob parent
if (!wh.globFilter) emitAdd(processPath(path), stats);
// don't recurse further if it would exceed depth setting
if (priorDepth && priorDepth > this.options.depth) return;
// scan the contents of the dir
readdirp({
root: wh.watchPath,
entryType: 'all',
fileFilter: wh.filterPath,
directoryFilter: wh.filterDir,
lstat: true,
depth: this.options.depth - (priorDepth || 0)
}).on('data', function(entry) {
// need to check filterPath on dirs b/c filterDir is less restrictive
if (entry.stat.isDirectory() && !wh.filterPath(entry)) return;
var joinedPath = sysPath.join(wh.watchPath, entry.path);
var fullPath = entry.fullPath;
if (wh.followSymlinks && entry.stat.isSymbolicLink()) {
// preserve the current depth here since it can't be derived from
// real paths past the symlink
var curDepth = this.options.depth === undefined ?
undefined : depth(joinedPath, sysPath.resolve(wh.watchPath)) + 1;
this._handleFsEventsSymlink(joinedPath, fullPath, processPath, curDepth);
} else {
emitAdd(joinedPath, entry.stat);
}
}.bind(this)).on('error', function() {
// Ignore readdirp errors
}).on('end', this._emitReady);
} else {
emitAdd(wh.watchPath, stats);
this._emitReady();
}
}.bind(this));
if (this.options.persistent && forceAdd !== true) {
var initWatch = function(error, realPath) {
if (this.closed) return;
var closer = this._watchWithFsEvents(
wh.watchPath,
sysPath.resolve(realPath || wh.watchPath),
processPath,
wh.globFilter
);
if (closer) {
this._closers[path] = this._closers[path] || [];
this._closers[path].push(closer);
}
}.bind(this);
if (typeof transform === 'function') {
// realpath has already been resolved
initWatch();
} else {
fs.realpath(wh.watchPath, initWatch);
}
}
};
module.exports = FsEventsHandler;
module.exports.canUse = canUse;

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node_modules/chokidar/lib/nodefs-handler.js generated vendored Normal file
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@ -0,0 +1,506 @@
'use strict';
var fs = require('fs');
var sysPath = require('path');
var readdirp = require('readdirp');
var isBinaryPath = require('is-binary-path');
// fs.watch helpers
// object to hold per-process fs.watch instances
// (may be shared across chokidar FSWatcher instances)
var FsWatchInstances = Object.create(null);
// Private function: Instantiates the fs.watch interface
// * path - string, path to be watched
// * options - object, options to be passed to fs.watch
// * listener - function, main event handler
// * errHandler - function, handler which emits info about errors
// * emitRaw - function, handler which emits raw event data
// Returns new fsevents instance
function createFsWatchInstance(path, options, listener, errHandler, emitRaw) {
var handleEvent = function(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.resolve(path, evPath), 'listeners', sysPath.join(path, evPath)
);
}
};
try {
return fs.watch(path, options, handleEvent);
} catch (error) {
errHandler(error);
}
}
// Private function: Helper for passing fs.watch event data to a
// collection of listeners
// * fullPath - string, absolute path bound to the fs.watch instance
// * type - string, listener type
// * val[1..3] - arguments to be passed to listeners
// Returns nothing
function fsWatchBroadcast(fullPath, type, val1, val2, val3) {
if (!FsWatchInstances[fullPath]) return;
FsWatchInstances[fullPath][type].forEach(function(listener) {
listener(val1, val2, val3);
});
}
// Private function: Instantiates the fs.watch interface or binds listeners
// to an existing one covering the same file system entry
// * path - string, path to be watched
// * fullPath - string, absolute path
// * options - object, options to be passed to fs.watch
// * handlers - object, container for event listener functions
// Returns close function
function setFsWatchListener(path, fullPath, options, handlers) {
var listener = handlers.listener;
var errHandler = handlers.errHandler;
var rawEmitter = handlers.rawEmitter;
var container = FsWatchInstances[fullPath];
var watcher;
if (!options.persistent) {
watcher = createFsWatchInstance(
path, options, listener, errHandler, rawEmitter
);
return watcher.close.bind(watcher);
}
if (!container) {
watcher = createFsWatchInstance(
path,
options,
fsWatchBroadcast.bind(null, fullPath, 'listeners'),
errHandler, // no need to use broadcast here
fsWatchBroadcast.bind(null, fullPath, 'rawEmitters')
);
if (!watcher) return;
var broadcastErr = fsWatchBroadcast.bind(null, fullPath, 'errHandlers');
watcher.on('error', function(error) {
container.watcherUnusable = true; // documented since Node 10.4.1
// Workaround for https://github.com/joyent/node/issues/4337
if (process.platform === 'win32' && error.code === 'EPERM') {
fs.open(path, 'r', function(err, fd) {
if (!err) fs.close(fd, function(err) {
if (!err) broadcastErr(error);
});
});
} else {
broadcastErr(error);
}
});
container = FsWatchInstances[fullPath] = {
listeners: [listener],
errHandlers: [errHandler],
rawEmitters: [rawEmitter],
watcher: watcher
};
} else {
container.listeners.push(listener);
container.errHandlers.push(errHandler);
container.rawEmitters.push(rawEmitter);
}
var listenerIndex = container.listeners.length - 1;
// removes this instance's listeners and closes the underlying fs.watch
// instance if there are no more listeners left
return function close() {
delete container.listeners[listenerIndex];
delete container.errHandlers[listenerIndex];
delete container.rawEmitters[listenerIndex];
if (!Object.keys(container.listeners).length) {
if (!container.watcherUnusable) { // check to protect against issue #730
container.watcher.close();
}
delete FsWatchInstances[fullPath];
}
};
}
// fs.watchFile helpers
// object to hold per-process fs.watchFile instances
// (may be shared across chokidar FSWatcher instances)
var FsWatchFileInstances = Object.create(null);
// Private function: Instantiates the fs.watchFile interface or binds listeners
// to an existing one covering the same file system entry
// * path - string, path to be watched
// * fullPath - string, absolute path
// * options - object, options to be passed to fs.watchFile
// * handlers - object, container for event listener functions
// Returns close function
function setFsWatchFileListener(path, fullPath, options, handlers) {
var listener = handlers.listener;
var rawEmitter = handlers.rawEmitter;
var container = FsWatchFileInstances[fullPath];
var listeners = [];
var rawEmitters = [];
if (
container && (
container.options.persistent < options.persistent ||
container.options.interval > options.interval
)
) {
// "Upgrade" the watcher to persistence or a quicker interval.
// This creates some unlikely edge case issues if the user mixes
// settings in a very weird way, but solving for those cases
// doesn't seem worthwhile for the added complexity.
listeners = container.listeners;
rawEmitters = container.rawEmitters;
fs.unwatchFile(fullPath);
container = false;
}
if (!container) {
listeners.push(listener);
rawEmitters.push(rawEmitter);
container = FsWatchFileInstances[fullPath] = {
listeners: listeners,
rawEmitters: rawEmitters,
options: options,
watcher: fs.watchFile(fullPath, options, function(curr, prev) {
container.rawEmitters.forEach(function(rawEmitter) {
rawEmitter('change', fullPath, {curr: curr, prev: prev});
});
var currmtime = curr.mtime.getTime();
if (curr.size !== prev.size || currmtime > prev.mtime.getTime() || currmtime === 0) {
container.listeners.forEach(function(listener) {
listener(path, curr);
});
}
})
};
} else {
container.listeners.push(listener);
container.rawEmitters.push(rawEmitter);
}
var listenerIndex = container.listeners.length - 1;
// removes this instance's listeners and closes the underlying fs.watchFile
// instance if there are no more listeners left
return function close() {
delete container.listeners[listenerIndex];
delete container.rawEmitters[listenerIndex];
if (!Object.keys(container.listeners).length) {
fs.unwatchFile(fullPath);
delete FsWatchFileInstances[fullPath];
}
};
}
// fake constructor for attaching nodefs-specific prototype methods that
// will be copied to FSWatcher's prototype
function NodeFsHandler() {}
// Private method: Watch file for changes with fs.watchFile or fs.watch.
// * path - string, path to file or directory.
// * listener - function, to be executed on fs change.
// Returns close function for the watcher instance
NodeFsHandler.prototype._watchWithNodeFs =
function(path, listener) {
var directory = sysPath.dirname(path);
var basename = sysPath.basename(path);
var parent = this._getWatchedDir(directory);
parent.add(basename);
var absolutePath = sysPath.resolve(path);
var options = {persistent: this.options.persistent};
if (!listener) listener = Function.prototype; // empty function
var closer;
if (this.options.usePolling) {
options.interval = this.enableBinaryInterval && isBinaryPath(basename) ?
this.options.binaryInterval : this.options.interval;
closer = setFsWatchFileListener(path, absolutePath, options, {
listener: listener,
rawEmitter: this.emit.bind(this, 'raw')
});
} else {
closer = setFsWatchListener(path, absolutePath, options, {
listener: listener,
errHandler: this._handleError.bind(this),
rawEmitter: this.emit.bind(this, 'raw')
});
}
return closer;
};
// Private method: Watch a file and emit add event if warranted
// * file - string, the file's path
// * stats - object, result of fs.stat
// * initialAdd - boolean, was the file added at watch instantiation?
// * callback - function, called when done processing as a newly seen file
// Returns close function for the watcher instance
NodeFsHandler.prototype._handleFile =
function(file, stats, initialAdd, callback) {
var dirname = sysPath.dirname(file);
var basename = sysPath.basename(file);
var parent = this._getWatchedDir(dirname);
// stats is always present
var prevStats = stats;
// if the file is already being watched, do nothing
if (parent.has(basename)) return callback();
// kick off the watcher
var closer = this._watchWithNodeFs(file, function(path, newStats) {
if (!this._throttle('watch', file, 5)) return;
if (!newStats || newStats && newStats.mtime.getTime() === 0) {
fs.stat(file, function(error, newStats) {
// Fix issues where mtime is null but file is still present
if (error) {
this._remove(dirname, basename);
} else {
// Check that change event was not fired because of changed only accessTime.
var at = newStats.atime.getTime();
var mt = newStats.mtime.getTime();
if (!at || at <= mt || mt !== prevStats.mtime.getTime()) {
this._emit('change', file, newStats);
}
prevStats = newStats;
}
}.bind(this));
// 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.
var at = newStats.atime.getTime();
var mt = newStats.mtime.getTime();
if (!at || at <= mt || mt !== prevStats.mtime.getTime()) {
this._emit('change', file, newStats);
}
prevStats = newStats;
}
}.bind(this));
// emit an add event if we're supposed to
if (!(initialAdd && this.options.ignoreInitial)) {
if (!this._throttle('add', file, 0)) return;
this._emit('add', file, stats);
}
if (callback) callback();
return closer;
};
// Private method: Handle symlinks encountered while reading a dir
// * entry - object, entry object returned by readdirp
// * directory - string, path of the directory being read
// * path - string, path of this item
// * item - string, basename of this item
// Returns true if no more processing is needed for this entry.
NodeFsHandler.prototype._handleSymlink =
function(entry, directory, path, item) {
var full = entry.fullPath;
var dir = this._getWatchedDir(directory);
if (!this.options.followSymlinks) {
// watch symlink directly (don't follow) and detect changes
this._readyCount++;
fs.realpath(path, function(error, linkPath) {
if (dir.has(item)) {
if (this._symlinkPaths[full] !== linkPath) {
this._symlinkPaths[full] = linkPath;
this._emit('change', path, entry.stat);
}
} else {
dir.add(item);
this._symlinkPaths[full] = linkPath;
this._emit('add', path, entry.stat);
}
this._emitReady();
}.bind(this));
return true;
}
// don't follow the same symlink more than once
if (this._symlinkPaths[full]) return true;
else this._symlinkPaths[full] = true;
};
// Private method: Read directory to add / remove files from `@watched` list
// and re-read it on change.
// * dir - string, fs path.
// * stats - object, result of fs.stat
// * initialAdd - boolean, was the file added at watch instantiation?
// * depth - int, depth relative to user-supplied path
// * target - string, child path actually targeted for watch
// * wh - object, common watch helpers for this path
// * callback - function, called when dir scan is complete
// Returns close function for the watcher instance
NodeFsHandler.prototype._handleDir =
function(dir, stats, initialAdd, depth, target, wh, callback) {
var parentDir = this._getWatchedDir(sysPath.dirname(dir));
var tracked = parentDir.has(sysPath.basename(dir));
if (!(initialAdd && this.options.ignoreInitial) && !target && !tracked) {
if (!wh.hasGlob || wh.globFilter(dir)) this._emit('addDir', dir, stats);
}
// ensure dir is tracked (harmless if redundant)
parentDir.add(sysPath.basename(dir));
this._getWatchedDir(dir);
var read = function(directory, initialAdd, done) {
// Normalize the directory name on Windows
directory = sysPath.join(directory, '');
if (!wh.hasGlob) {
var throttler = this._throttle('readdir', directory, 1000);
if (!throttler) return;
}
var previous = this._getWatchedDir(wh.path);
var current = [];
readdirp({
root: directory,
entryType: 'all',
fileFilter: wh.filterPath,
directoryFilter: wh.filterDir,
depth: 0,
lstat: true
}).on('data', function(entry) {
var item = entry.path;
var path = sysPath.join(directory, item);
current.push(item);
if (entry.stat.isSymbolicLink() &&
this._handleSymlink(entry, directory, path, item)) 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._readyCount++;
// ensure relativeness of path is preserved in case of watcher reuse
path = sysPath.join(dir, sysPath.relative(dir, path));
this._addToNodeFs(path, initialAdd, wh, depth + 1);
}
}.bind(this)).on('end', function() {
var wasThrottled = throttler ? throttler.clear() : false;
if (done) done();
// Files that absent in current directory snapshot
// but present in previous emit `remove` event
// and are removed from @watched[directory].
previous.children().filter(function(item) {
return item !== directory &&
current.indexOf(item) === -1 &&
// 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.resolve(directory, item)
}));
}).forEach(function(item) {
this._remove(directory, item);
}, this);
// one more time for any missed in case changes came in extremely quickly
if (wasThrottled) read(directory, false);
}.bind(this)).on('error', this._handleError.bind(this));
}.bind(this);
var closer;
if (this.options.depth == null || depth <= this.options.depth) {
if (!target) read(dir, initialAdd, callback);
closer = this._watchWithNodeFs(dir, function(dirPath, stats) {
// if current directory is removed, do nothing
if (stats && stats.mtime.getTime() === 0) return;
read(dirPath, false);
});
} else {
callback();
}
return closer;
};
// Private method: Handle added file, directory, or glob pattern.
// Delegates call to _handleFile / _handleDir after checks.
// * path - string, path to file or directory.
// * initialAdd - boolean, was the file added at watch instantiation?
// * depth - int, depth relative to user-supplied path
// * target - string, child path actually targeted for watch
// * callback - function, indicates whether the path was found or not
// Returns nothing
NodeFsHandler.prototype._addToNodeFs =
function(path, initialAdd, priorWh, depth, target, callback) {
if (!callback) callback = Function.prototype;
var ready = this._emitReady;
if (this._isIgnored(path) || this.closed) {
ready();
return callback(null, false);
}
var wh = this._getWatchHelpers(path, depth);
if (!wh.hasGlob && priorWh) {
wh.hasGlob = priorWh.hasGlob;
wh.globFilter = priorWh.globFilter;
wh.filterPath = priorWh.filterPath;
wh.filterDir = priorWh.filterDir;
}
// evaluate what is at the path we're being asked to watch
fs[wh.statMethod](wh.watchPath, function(error, stats) {
if (this._handleError(error)) return callback(null, path);
if (this._isIgnored(wh.watchPath, stats)) {
ready();
return callback(null, false);
}
var initDir = function(dir, target) {
return this._handleDir(dir, stats, initialAdd, depth, target, wh, ready);
}.bind(this);
var closer;
if (stats.isDirectory()) {
closer = initDir(wh.watchPath, target);
} else if (stats.isSymbolicLink()) {
var parent = sysPath.dirname(wh.watchPath);
this._getWatchedDir(parent).add(wh.watchPath);
this._emit('add', wh.watchPath, stats);
closer = initDir(parent, path);
// preserve this symlink's target path
fs.realpath(path, function(error, targetPath) {
this._symlinkPaths[sysPath.resolve(path)] = targetPath;
ready();
}.bind(this));
} else {
closer = this._handleFile(wh.watchPath, stats, initialAdd, ready);
}
if (closer) {
this._closers[path] = this._closers[path] || [];
this._closers[path].push(closer);
}
callback(null, false);
}.bind(this));
};
module.exports = NodeFsHandler;

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{
"name": "chokidar",
"description": "A neat wrapper around node.js fs.watch / fs.watchFile / fsevents.",
"version": "2.1.8",
"keywords": [
"fs",
"watch",
"watchFile",
"watcher",
"watching",
"file",
"fsevents"
],
"types": "./types/index.d.ts",
"homepage": "https://github.com/paulmillr/chokidar",
"author": "Paul Miller (https://paulmillr.com), Elan Shanker",
"repository": {
"type": "git",
"url": "https://github.com/paulmillr/chokidar.git"
},
"bugs": {
"url": "https://github.com/paulmillr/chokidar/issues"
},
"license": "MIT",
"scripts": {
"test": "nyc mocha --exit",
"coveralls": "nyc report --reporter=text-lcov | coveralls",
"dtslint": "dtslint types"
},
"files": [
"index.js",
"lib/",
"types/index.d.ts"
],
"dependencies": {
"anymatch": "^2.0.0",
"async-each": "^1.0.1",
"braces": "^2.3.2",
"glob-parent": "^3.1.0",
"inherits": "^2.0.3",
"is-binary-path": "^1.0.0",
"is-glob": "^4.0.0",
"normalize-path": "^3.0.0",
"path-is-absolute": "^1.0.0",
"readdirp": "^2.2.1",
"upath": "^1.1.1"
},
"optionalDependencies": {
"fsevents": "^1.2.7"
},
"devDependencies": {
"@types/node": "^11.9.4",
"chai": "^3.2.0",
"coveralls": "^3.0.1",
"dtslint": "0.4.1",
"graceful-fs": "4.1.4",
"mocha": "^5.2.0",
"nyc": "^11.8.0",
"rimraf": "^2.4.3",
"sinon": "^1.10.3",
"sinon-chai": "^2.6.0"
}
}

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// TypeScript Version: 3.0
/// <reference types="node" />
import * as fs from "fs";
import { EventEmitter } from "events";
/**
* 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.
*/
export interface WatchedPaths {
[directory: string]: string[];
}
export class FSWatcher extends EventEmitter implements fs.FSWatcher {
/**
* 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 | string[]): void;
/**
* Stop watching files, directories, or glob patterns. Takes an array of strings or just one
* string.
*/
unwatch(paths: string | string[]): void;
/**
* 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(): WatchedPaths;
/**
* Removes all listeners from watched files.
*/
close(): 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 occured
*/
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;
}
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/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`](http://nodejs.org/api/fs.html#fs_class_fs_stats) object of that path).
*/
ignored?: any;
/**
* 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`](http://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 | string[],
options?: WatchOptions
): FSWatcher;