timepiece/node_modules/gulp/README.md

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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 align="center">The streaming build system</p>
</p>
[![NPM version][npm-image]][npm-url] [![Downloads][downloads-image]][npm-url] [![Azure Pipelines Build Status][azure-pipelines-image]][azure-pipelines-url] [![Build Status][travis-image]][travis-url] [![AppVeyor Build Status][appveyor-image]][appveyor-url] [![Coveralls Status][coveralls-image]][coveralls-url] [![OpenCollective Backers][backer-badge]][backer-url] [![OpenCollective Sponsors][sponsor-badge]][sponsor-url] [![Gitter chat][gitter-image]][gitter-url]
## What is gulp?
- **Automation** - gulp is a toolkit that helps you automate painful or time-consuming tasks in your development workflow.
- **Platform-agnostic** - Integrations are built into all major IDEs and people are using gulp with PHP, .NET, Node.js, Java, and other platforms.
- **Strong Ecosystem** - Use npm modules to do anything you want + over 2000 curated plugins for streaming file transformations
- **Simple** - By providing only a minimal API surface, gulp is easy to learn and simple to use
## What's new in 4.0?!
* The task system was rewritten from the ground-up, allowing task composition using `series()` and `parallel()` methods
* The watcher was updated, now using chokidar (no more need for gulp-watch!), with feature parity to our task system
* First-class support was added for incremental builds using `lastRun()`
* A `symlink()` method was exposed to create symlinks instead of copying files
* Built-in support for sourcemaps was added - the gulp-sourcemaps plugin is no longer necessary!
* Task registration of exported functions - using node or ES exports - is now recommended
* Custom registries were designed, allowing for shared tasks or augmented functionality
* Stream implementations were improved, allowing for better conditional and phased builds
## Installation
Follow our [Quick Start guide][quick-start].
## Roadmap
Find out about all our work-in-progress and outstanding issues at https://github.com/orgs/gulpjs/projects.
## Documentation
Check out the [Getting Started guide][getting-started-guide] and [API docs][api-docs] on our website!
__Excuse our dust! All other docs will be behind until we get everything updated. Please open an issue if something isn't working.__
## Sample `gulpfile.js`
This file will give you a taste of what gulp does.
```js
var gulp = require('gulp');
var less = require('gulp-less');
var babel = require('gulp-babel');
var concat = require('gulp-concat');
var uglify = require('gulp-uglify');
var rename = require('gulp-rename');
var cleanCSS = require('gulp-clean-css');
var del = require('del');
var paths = {
styles: {
src: 'src/styles/**/*.less',
dest: 'assets/styles/'
},
scripts: {
src: 'src/scripts/**/*.js',
dest: 'assets/scripts/'
}
};
/* Not all tasks need to use streams, a gulpfile is just another node program
* and you can use all packages available on npm, but it must return either a
* Promise, a Stream or take a callback and call it
*/
function clean() {
// You can use multiple globbing patterns as you would with `gulp.src`,
// for example if you are using del 2.0 or above, return its promise
return del([ 'assets' ]);
}
/*
* Define our tasks using plain functions
*/
function styles() {
return gulp.src(paths.styles.src)
.pipe(less())
.pipe(cleanCSS())
// pass in options to the stream
.pipe(rename({
basename: 'main',
suffix: '.min'
}))
.pipe(gulp.dest(paths.styles.dest));
}
function scripts() {
return gulp.src(paths.scripts.src, { sourcemaps: true })
.pipe(babel())
.pipe(uglify())
.pipe(concat('main.min.js'))
.pipe(gulp.dest(paths.scripts.dest));
}
function watch() {
gulp.watch(paths.scripts.src, scripts);
gulp.watch(paths.styles.src, styles);
}
/*
* Specify if tasks run in series or parallel using `gulp.series` and `gulp.parallel`
*/
var build = gulp.series(clean, gulp.parallel(styles, scripts));
/*
* You can use CommonJS `exports` module notation to declare tasks
*/
exports.clean = clean;
exports.styles = styles;
exports.scripts = scripts;
exports.watch = watch;
exports.build = build;
/*
* Define default task that can be called by just running `gulp` from cli
*/
exports.default = build;
```
## Use latest JavaScript version in your gulpfile
__Most new versions of node support most features that Babel provides, except the `import`/`export` syntax. When only that syntax is desired, rename to `gulpfile.esm.js`, install the [esm][esm-module] module, and skip the Babel portion below.__
Node already supports a lot of __ES2015+__ features, but to avoid compatibility problems we suggest to install Babel and rename your `gulpfile.js` to `gulpfile.babel.js`.
```sh
npm install --save-dev @babel/register @babel/core @babel/preset-env
```
Then create a **.babelrc** file with the preset configuration.
```js
{
"presets": [ "@babel/preset-env" ]
}
```
And here's the same sample from above written in **ES2015+**.
```js
import gulp from 'gulp';
import less from 'gulp-less';
import babel from 'gulp-babel';
import concat from 'gulp-concat';
import uglify from 'gulp-uglify';
import rename from 'gulp-rename';
import cleanCSS from 'gulp-clean-css';
import del from 'del';
const paths = {
styles: {
src: 'src/styles/**/*.less',
dest: 'assets/styles/'
},
scripts: {
src: 'src/scripts/**/*.js',
dest: 'assets/scripts/'
}
};
/*
* For small tasks you can export arrow functions
*/
export const clean = () => del([ 'assets' ]);
/*
* You can also declare named functions and export them as tasks
*/
export function styles() {
return gulp.src(paths.styles.src)
.pipe(less())
.pipe(cleanCSS())
// pass in options to the stream
.pipe(rename({
basename: 'main',
suffix: '.min'
}))
.pipe(gulp.dest(paths.styles.dest));
}
export function scripts() {
return gulp.src(paths.scripts.src, { sourcemaps: true })
.pipe(babel())
.pipe(uglify())
.pipe(concat('main.min.js'))
.pipe(gulp.dest(paths.scripts.dest));
}
/*
* You could even use `export as` to rename exported tasks
*/
function watchFiles() {
gulp.watch(paths.scripts.src, scripts);
gulp.watch(paths.styles.src, styles);
}
export { watchFiles as watch };
const build = gulp.series(clean, gulp.parallel(styles, scripts));
/*
* Export a default task
*/
export default build;
```
## Incremental Builds
You can filter out unchanged files between runs of a task using
the `gulp.src` function's `since` option and `gulp.lastRun`:
```js
const paths = {
...
images: {
src: 'src/images/**/*.{jpg,jpeg,png}',
dest: 'build/img/'
}
}
function images() {
return gulp.src(paths.images.src, {since: gulp.lastRun(images)})
.pipe(imagemin({optimizationLevel: 5}))
.pipe(gulp.dest(paths.images.dest));
}
function watch() {
gulp.watch(paths.images.src, images);
}
```
Task run times are saved in memory and are lost when gulp exits. It will only
save time during the `watch` task when running the `images` task
for a second time.
## Want to contribute?
Anyone can help make this project better - check out our [Contributing guide](/CONTRIBUTING.md)!
## Backers
Support us with a monthly donation and help us continue our activities.
[![Backers][backers-image]][support-url]
## Sponsors
Become a sponsor to get your logo on our README on Github.
[![Sponsors][sponsors-image]][support-url]
[downloads-image]: https://img.shields.io/npm/dm/gulp.svg
[npm-url]: https://www.npmjs.com/package/gulp
[npm-image]: https://img.shields.io/npm/v/gulp.svg
[azure-pipelines-url]: https://dev.azure.com/gulpjs/gulp/_build/latest?definitionId=1&branchName=master
[azure-pipelines-image]: https://dev.azure.com/gulpjs/gulp/_apis/build/status/gulp?branchName=master
[travis-url]: https://travis-ci.org/gulpjs/gulp
[travis-image]: https://img.shields.io/travis/gulpjs/gulp.svg?label=travis-ci
[appveyor-url]: https://ci.appveyor.com/project/gulpjs/gulp
[appveyor-image]: https://img.shields.io/appveyor/ci/gulpjs/gulp.svg?label=appveyor
[coveralls-url]: https://coveralls.io/r/gulpjs/gulp
[coveralls-image]: https://img.shields.io/coveralls/gulpjs/gulp/master.svg
[gitter-url]: https://gitter.im/gulpjs/gulp
[gitter-image]: https://badges.gitter.im/gulpjs/gulp.svg
[backer-url]: #backers
[backer-badge]: https://opencollective.com/gulpjs/backers/badge.svg?color=blue
[sponsor-url]: #sponsors
[sponsor-badge]: https://opencollective.com/gulpjs/sponsors/badge.svg?color=blue
[support-url]: https://opencollective.com/gulpjs#support
[backers-image]: https://opencollective.com/gulpjs/backers.svg
[sponsors-image]: https://opencollective.com/gulpjs/sponsors.svg
[quick-start]: https://gulpjs.com/docs/en/getting-started/quick-start
[getting-started-guide]: https://gulpjs.com/docs/en/getting-started/quick-start
[api-docs]: https://gulpjs.com/docs/en/api/concepts