Static asset revisioning by appending content hash to filenames unicorn.css → unicorn-d41d8cd98f.css

This project is feature complete. PRs adding new features will not be accepted.

Make sure to set the files to never expire for this to have an effect.

npm install --save-dev gulp-rev

import gulp from 'gulp';
import rev from 'gulp-rev';

export default () => (
	gulp.src('src/*.css')
		.pipe(rev())
		.pipe(gulp.dest('dist'))
);

Type: string
Default: 'rev-manifest.json'

Manifest file path.

Type: object

Type: string
Default: process.cwd()

Override the base of the manifest file.

Type: string
Default: process.cwd()

Override the current working directory of the manifest file.

Type: boolean
Default: false

Merge existing manifest file.

Type: object
Default: JSON

An object with parse and stringify methods. This can be used to provide a custom transformer instead of the default JSON for the manifest file.

Original file paths are stored at file.revOrigPath. This could come in handy for things like rewriting references to the assets.

The hash of each rev'd file is stored at file.revHash. You can use this for customizing the file renaming, or for building different manifest formats.

import gulp from 'gulp';
import rev from 'gulp-rev';

export default () => (
	// By default, Gulp would pick `assets/css` as the base,
	// so we need to set it explicitly:
	gulp.src(['assets/css/*.css', 'assets/js/*.js'], {base: 'assets'})
		.pipe(gulp.dest('build/assets'))  // Copy original assets to build dir
		.pipe(rev())
		.pipe(gulp.dest('build/assets'))  // Write rev'd assets to build dir
		.pipe(rev.manifest())
		.pipe(gulp.dest('build/assets'))  // Write manifest to build dir
);

An asset manifest, mapping the original paths to the revisioned paths, will be written to build/assets/rev-manifest.json:

{
	"css/unicorn.css": "css/unicorn-d41d8cd98f.css",
	"js/unicorn.js": "js/unicorn-273c2c123f.js"
}

By default, rev-manifest.json will be replaced as a whole. To merge with an existing manifest, pass merge: true and the output destination (as base) to rev.manifest():

import gulp from 'gulp';
import rev from 'gulp-rev';

export default () => (
	// By default, Gulp would pick `assets/css` as the base,
	// so we need to set it explicitly:
	gulp.src(['assets/css/*.css', 'assets/js/*.js'], {base: 'assets'})
		.pipe(gulp.dest('build/assets'))
		.pipe(rev())
		.pipe(gulp.dest('build/assets'))
		.pipe(rev.manifest({
			base: 'build/assets',
			merge: true // Merge with the existing manifest if one exists
		}))
		.pipe(gulp.dest('build/assets'))
);

You can optionally call rev.manifest('manifest.json') to give it a different path or filename.

Because of the way gulp-concat handles file paths, you may need to set cwd and path manually on your gulp-concat instance to get everything to work correctly:

import gulp from 'gulp';
import rev from 'gulp-rev';
import sourcemaps from 'gulp-sourcemaps';
import concat from 'gulp-concat';

export default () => (
	gulp.src('src/*.js')
		.pipe(sourcemaps.init())
		.pipe(concat({path: 'bundle.js', cwd: ''}))
		.pipe(rev())
		.pipe(sourcemaps.write('.'))
		.pipe(gulp.dest('dist'))
);

Since the order of streams are not guaranteed, some plugins such as gulp-concat can cause the final file's content and hash to change. To avoid generating a new hash for unchanged source files, you can:

• Sort the streams with gulp-sort
• Filter unchanged files with gulp-unchanged
• Read more about incremental builds

This plugin does not support streaming. If you have files from a streaming source, such as Browserify, you should use gulp-buffer before gulp-rev in your pipeline:

import gulp from 'gulp';
import browserify from 'browserify';
import source from 'vinyl-source-stream';
import buffer from 'gulp-buffer';
import rev from 'gulp-rev';

export default () => (
	browserify('src/index.js')
		.bundle({debug: true})
		.pipe(source('index.min.js'))
		.pipe(buffer())
		.pipe(rev())
		.pipe(gulp.dest('dist'))
);

For more info on how to integrate gulp-rev into your app, have a look at the integration guide.

It may be useful - and necessary - to use gulp-rev with other packages to complete the task.

• gulp-rev-rewrite - Rewrite occurrences of filenames which have been renamed
• gulp-rev-css-url - Override URLs in CSS files with the revved ones
• gulp-rev-outdated - Old static asset revision files filter
• gulp-rev-collector - Static asset revision data collector
• rev-del - Delete old unused assets
• gulp-rev-delete-original - Delete original files after rev
• gulp-rev-dist-clean - Clean up temporary and legacy files created by gulp-rev
• gulp-rev-loader - Use rev-manifest with webpack
• gulp-rev-format - Provide hash formatting options for static assets (prefix, suffix, last-extension)
• gulp-rev-sri - Add subresource integrity field to rev-manifest