gulp-hash [![NPM version][npm-image]][npm-url] [![Build Status][travis-image]][travis-url]

Cachebust your assets by adding a hash to the filename

npm install --save-dev gulp-hash

Basic usage

``javascript
var hash = require('gulp-hash');

gulp.src('./js/*/.js')
.pipe(hash()) // Add hashes to the files' names
.pipe(gulp.dest('public/js')) // Write the renamed files
.pipe(hash.manifest('public/assets.json', { // Generate the manifest file
deleteOld: true,
sourceDir: __dirname + '/public/js'
}))
.pipe(gulp.dest('.')); // Write the manifest file (see note below)
`

The "manifest" is a JSON file that maps the original filenames to the renamed ones.

Note: It is recommended to use the full relative path to the manifest file in hash.manifest() as opposed to setting it in gulp.dest(). This is so the append option is able find the original manifest file. The example above demonstrates this.

Streaming

The plugin fully supports both buffers and streams. If you encounter any problems, please open an issue on GitHub and I'll look into it!

API

$3

| Option | Default | Description |
| ------ | ------- | ----------- |
| algorithm | 'sha1' | A hashing algorithm for crypto.createHash |
| hashLength | 8 | The length of the hash to add to the file's name (slice from the start of the full hash) |
| template | '<%= name %>-<%= hash %><%= ext %>' | The template used when adding the hash |
| version | '' | A key to change the files' hashes without actually changing their content; appended to the contents when hashing |

$3

| Parameter | Default | Description |
| --------- | ------- | ----------- |
| manifestPath | (none) | The desired path to the manifest file |
| options.append | true | Whether to merge the new manifest with an existing one's contents (same filename, doesn't have to exist before first run) |
| options.space | null | The space parameter for JSON.stringify()|
| options.deleteOld | false | If set to true, deletes old versions of hashed files |
| options.sourceDir | __dirname | Used with deleteOld`. Specifies where to search for old files to delete. |

$3

| Parameter | Default | Description |
| --------- | ------- | ----------- |
| manifestPath | (none) | The desired path to the manifest file |
| append | true | (optional) Whether to merge the new manifest with an existing one's contents (same filename, doesn't have to exist before first run) |
| space | undefined | (optional) The space parameter for JSON.stringify()|

[npm-url]: https://www.npmjs.org/package/gulp-hash
[npm-image]: https://badge.fury.io/js/gulp-hash.svg

[travis-url]: https://travis-ci.org/Dragory/gulp-hash
[travis-image]: https://api.travis-ci.org/Dragory/gulp-hash.svg