284 lines
8.8 KiB
Markdown
284 lines
8.8 KiB
Markdown
<p align="center">
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<a href="https://gulpjs.com">
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<img height="257" width="114" src="https://raw.githubusercontent.com/gulpjs/artwork/master/gulp-2x.png">
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</a>
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<p align="center">The streaming build system</p>
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</p>
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[![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]
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## What is gulp?
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- **Automation** - gulp is a toolkit that helps you automate painful or time-consuming tasks in your development workflow.
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- **Platform-agnostic** - Integrations are built into all major IDEs and people are using gulp with PHP, .NET, Node.js, Java, and other platforms.
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- **Strong Ecosystem** - Use npm modules to do anything you want + over 2000 curated plugins for streaming file transformations
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- **Simple** - By providing only a minimal API surface, gulp is easy to learn and simple to use
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## What's new in 4.0?!
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* The task system was rewritten from the ground-up, allowing task composition using `series()` and `parallel()` methods
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* The watcher was updated, now using chokidar (no more need for gulp-watch!), with feature parity to our task system
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* First-class support was added for incremental builds using `lastRun()`
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* A `symlink()` method was exposed to create symlinks instead of copying files
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* Built-in support for sourcemaps was added - the gulp-sourcemaps plugin is no longer necessary!
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* Task registration of exported functions - using node or ES exports - is now recommended
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* Custom registries were designed, allowing for shared tasks or augmented functionality
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* Stream implementations were improved, allowing for better conditional and phased builds
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## Installation
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Follow our [Quick Start guide][quick-start].
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## Roadmap
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Find out about all our work-in-progress and outstanding issues at https://github.com/orgs/gulpjs/projects.
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## Documentation
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Check out the [Getting Started guide][getting-started-guide] and [API docs][api-docs] on our website!
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__Excuse our dust! All other docs will be behind until we get everything updated. Please open an issue if something isn't working.__
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## Sample `gulpfile.js`
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This file will give you a taste of what gulp does.
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```js
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var gulp = require('gulp');
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var less = require('gulp-less');
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var babel = require('gulp-babel');
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var concat = require('gulp-concat');
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var uglify = require('gulp-uglify');
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var rename = require('gulp-rename');
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var cleanCSS = require('gulp-clean-css');
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var del = require('del');
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var paths = {
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styles: {
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src: 'src/styles/**/*.less',
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dest: 'assets/styles/'
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},
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scripts: {
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src: 'src/scripts/**/*.js',
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dest: 'assets/scripts/'
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}
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};
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/* Not all tasks need to use streams, a gulpfile is just another node program
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* and you can use all packages available on npm, but it must return either a
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* Promise, a Stream or take a callback and call it
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*/
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function clean() {
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// You can use multiple globbing patterns as you would with `gulp.src`,
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// for example if you are using del 2.0 or above, return its promise
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return del([ 'assets' ]);
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}
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/*
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* Define our tasks using plain functions
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*/
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function styles() {
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return gulp.src(paths.styles.src)
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.pipe(less())
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.pipe(cleanCSS())
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// pass in options to the stream
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.pipe(rename({
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basename: 'main',
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suffix: '.min'
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}))
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.pipe(gulp.dest(paths.styles.dest));
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}
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function scripts() {
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return gulp.src(paths.scripts.src, { sourcemaps: true })
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.pipe(babel())
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.pipe(uglify())
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.pipe(concat('main.min.js'))
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.pipe(gulp.dest(paths.scripts.dest));
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}
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function watch() {
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gulp.watch(paths.scripts.src, scripts);
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gulp.watch(paths.styles.src, styles);
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}
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/*
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* Specify if tasks run in series or parallel using `gulp.series` and `gulp.parallel`
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*/
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var build = gulp.series(clean, gulp.parallel(styles, scripts));
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/*
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* You can use CommonJS `exports` module notation to declare tasks
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*/
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exports.clean = clean;
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exports.styles = styles;
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exports.scripts = scripts;
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exports.watch = watch;
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exports.build = build;
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/*
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* Define default task that can be called by just running `gulp` from cli
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*/
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exports.default = build;
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```
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## Use latest JavaScript version in your gulpfile
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__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.__
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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`.
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```sh
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npm install --save-dev @babel/register @babel/core @babel/preset-env
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```
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Then create a **.babelrc** file with the preset configuration.
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```js
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{
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"presets": [ "@babel/preset-env" ]
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}
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```
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And here's the same sample from above written in **ES2015+**.
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```js
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import gulp from 'gulp';
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import less from 'gulp-less';
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import babel from 'gulp-babel';
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import concat from 'gulp-concat';
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import uglify from 'gulp-uglify';
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import rename from 'gulp-rename';
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import cleanCSS from 'gulp-clean-css';
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import del from 'del';
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const paths = {
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styles: {
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src: 'src/styles/**/*.less',
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dest: 'assets/styles/'
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},
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scripts: {
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src: 'src/scripts/**/*.js',
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dest: 'assets/scripts/'
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}
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};
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/*
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* For small tasks you can export arrow functions
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*/
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export const clean = () => del([ 'assets' ]);
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/*
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* You can also declare named functions and export them as tasks
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*/
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export function styles() {
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return gulp.src(paths.styles.src)
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.pipe(less())
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.pipe(cleanCSS())
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// pass in options to the stream
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.pipe(rename({
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basename: 'main',
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suffix: '.min'
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}))
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.pipe(gulp.dest(paths.styles.dest));
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}
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export function scripts() {
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return gulp.src(paths.scripts.src, { sourcemaps: true })
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.pipe(babel())
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.pipe(uglify())
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.pipe(concat('main.min.js'))
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.pipe(gulp.dest(paths.scripts.dest));
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}
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/*
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* You could even use `export as` to rename exported tasks
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*/
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function watchFiles() {
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gulp.watch(paths.scripts.src, scripts);
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gulp.watch(paths.styles.src, styles);
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}
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export { watchFiles as watch };
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const build = gulp.series(clean, gulp.parallel(styles, scripts));
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/*
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* Export a default task
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*/
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export default build;
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```
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## Incremental Builds
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You can filter out unchanged files between runs of a task using
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the `gulp.src` function's `since` option and `gulp.lastRun`:
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```js
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const paths = {
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...
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images: {
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src: 'src/images/**/*.{jpg,jpeg,png}',
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dest: 'build/img/'
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}
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}
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function images() {
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return gulp.src(paths.images.src, {since: gulp.lastRun(images)})
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.pipe(imagemin({optimizationLevel: 5}))
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.pipe(gulp.dest(paths.images.dest));
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}
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function watch() {
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gulp.watch(paths.images.src, images);
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}
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```
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Task run times are saved in memory and are lost when gulp exits. It will only
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save time during the `watch` task when running the `images` task
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for a second time.
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## Want to contribute?
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Anyone can help make this project better - check out our [Contributing guide](/CONTRIBUTING.md)!
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## Backers
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Support us with a monthly donation and help us continue our activities.
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[![Backers][backers-image]][support-url]
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## Sponsors
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Become a sponsor to get your logo on our README on Github.
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[![Sponsors][sponsors-image]][support-url]
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[downloads-image]: https://img.shields.io/npm/dm/gulp.svg
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[npm-url]: https://www.npmjs.com/package/gulp
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[npm-image]: https://img.shields.io/npm/v/gulp.svg
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[azure-pipelines-url]: https://dev.azure.com/gulpjs/gulp/_build/latest?definitionId=1&branchName=master
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[azure-pipelines-image]: https://dev.azure.com/gulpjs/gulp/_apis/build/status/gulp?branchName=master
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[travis-url]: https://travis-ci.org/gulpjs/gulp
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[travis-image]: https://img.shields.io/travis/gulpjs/gulp.svg?label=travis-ci
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[appveyor-url]: https://ci.appveyor.com/project/gulpjs/gulp
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[appveyor-image]: https://img.shields.io/appveyor/ci/gulpjs/gulp.svg?label=appveyor
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[coveralls-url]: https://coveralls.io/r/gulpjs/gulp
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[coveralls-image]: https://img.shields.io/coveralls/gulpjs/gulp/master.svg
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[gitter-url]: https://gitter.im/gulpjs/gulp
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[gitter-image]: https://badges.gitter.im/gulpjs/gulp.svg
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[backer-url]: #backers
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[backer-badge]: https://opencollective.com/gulpjs/backers/badge.svg?color=blue
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[sponsor-url]: #sponsors
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[sponsor-badge]: https://opencollective.com/gulpjs/sponsors/badge.svg?color=blue
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[support-url]: https://opencollective.com/gulpjs#support
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[backers-image]: https://opencollective.com/gulpjs/backers.svg
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[sponsors-image]: https://opencollective.com/gulpjs/sponsors.svg
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[quick-start]: https://gulpjs.com/docs/en/getting-started/quick-start
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[getting-started-guide]: https://gulpjs.com/docs/en/getting-started/quick-start
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[api-docs]: https://gulpjs.com/docs/en/api/concepts
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