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README.md
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<p align="center">
<a href="http://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] [![Build Status][travis-image]][travis-url] [![Coveralls Status][coveralls-image]][coveralls-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
## Documentation
For a Getting started guide, API docs, recipes, making a plugin, etc. check out or docs!
- Need something reliable? Check out the [documentation for the current release](/docs/README.md)!
- Want to help us test the latest and greatest? Check out the [documentation for the next release](https://github.com/gulpjs/gulp/tree/4.0)!
## Sample `gulpfile.js`
This file will give you a taste of what gulp does.
```js
var gulp = require('gulp');
var coffee = require('gulp-coffee');
var concat = require('gulp-concat');
var uglify = require('gulp-uglify');
var imagemin = require('gulp-imagemin');
var sourcemaps = require('gulp-sourcemaps');
var del = require('del');
var paths = {
scripts: ['client/js/**/*.coffee', '!client/external/**/*.coffee'],
images: 'client/img/**/*'
};
// Not all tasks need to use streams
// A gulpfile is just another node program and you can use any package available on npm
gulp.task('clean', function() {
// You can use multiple globbing patterns as you would with `gulp.src`
return del(['build']);
});
gulp.task('scripts', ['clean'], function() {
// Minify and copy all JavaScript (except vendor scripts)
// with sourcemaps all the way down
return gulp.src(paths.scripts)
.pipe(sourcemaps.init())
.pipe(coffee())
.pipe(uglify())
.pipe(concat('all.min.js'))
.pipe(sourcemaps.write())
.pipe(gulp.dest('build/js'));
});
// Copy all static images
gulp.task('images', ['clean'], function() {
return gulp.src(paths.images)
// Pass in options to the task
.pipe(imagemin({optimizationLevel: 5}))
.pipe(gulp.dest('build/img'));
});
// Rerun the task when a file changes
gulp.task('watch', function() {
gulp.watch(paths.scripts, ['scripts']);
gulp.watch(paths.images, ['images']);
});
// The default task (called when you run `gulp` from cli)
gulp.task('default', ['watch', 'scripts', 'images']);
```
## Incremental Builds
We recommend these plugins:
- [gulp-changed](https://github.com/sindresorhus/gulp-changed) - only pass through changed files
- [gulp-cached](https://github.com/contra/gulp-cached) - in-memory file cache, not for operation on sets of files
- [gulp-remember](https://github.com/ahaurw01/gulp-remember) - pairs nicely with gulp-cached
- [gulp-newer](https://github.com/tschaub/gulp-newer) - pass through newer source files only, supports many:1 source:dest
## Want to contribute?
Anyone can help make this project better - check out our [Contributing guide](/CONTRIBUTING.md)!
[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
[travis-url]: https://travis-ci.org/gulpjs/gulp
[travis-image]: https://img.shields.io/travis/gulpjs/gulp.svg
[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.png

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