Use this plugin in a project built using BroccoliJs to add CSS image sprites to it. Includes instructions for how to integrate into an ember-cli also included, and direct support is planned.

Supported stylesheet formats: SCSS, SASS, LESS, Stylus, CSS

npm install --save broccoli-sprite

You will need to install at least one of the following, before installing broccoli-sprite.

• GraphicsMagick
  • On Ubuntu:
    • sudo apt-get install graphicsmagick
  • On Windows:
    • Instructions here
• node canvas
  • Ensure that you have NodeJs version is v0.10.29 (>= v0.11.x will not work)
  • On Ubuntu:
    • sudo apt-get install libcairo2-dev libjpeg8-dev libpango1.0-dev libgif-dev build-essential g++
    • npm install -g canvas

In Brocfile.js, add the following:

var broccoliSprite = require('broccoli-sprite');
var spritesTree = broccoliSprite('public', {
  src: [ 'public/images/sprites/*.png' ],
  spritePath: 'assets/sprites.png',
  stylesheetPath: 'assets/sprites.css',
  stylesheet: 'css',
  stylesheetOptions: {
    prefix: 'sprite-',
    spritePath: '/assets/sprites.png',
  },
});

… and be sure to merge spritesTree into the main tree.

Note that it is important to specify stylesheetOptions.spritePath, as otherwise a relative path will be used, and this will not work with fingerprinting, which is enabled by default in when building with environment=production.

It used to be rather complicated, but now ember-cli's addon/ plugin system has more features, and thus it is really as simple as npm installing a module.

You will, however, need to install a different package: ember-sprite. Look for a one-liner installation instruction there!

broccoli-sprite wraps around the excellent node-sprite-generator library.

When you call broccoliSprite, it accepts two arguments: tree and options.

This is any broccoli tree. In an ember-cli app, this would most likely be 'public'.

These options are passed into node-sprite-generator, so follow the options specified here.

There are a few things to note though:

src is the full path, not the path within the tree. Notice that in the example above, the tree is 'public', and "public" is repeated in the path within src.

The same is not true for output paths though, spritePath and stylesheetPath, which must be specified relative to the tree. Notice that "public" is not repeated within these paths.

• Make work with live-reload
• Make it work as an ember-cli registry plugin, so that there is no need to extend EmberApp in Brocfile.js
  • Dependent on ember-cli release where plugin registry is exposed. See this issue,
    • Reference example: ember-cli-esnext
    • Landed with ember-sprite
• Integrate into EmberApp.styles() such that CSS for sprites is concatenated and minifed together with CSS of app
  • Generated sprite images exported into style tree
  • Works in conjunction with registry plugin system, so that there is no need to extend EmberApp in Brocfile.js
    • Landed with ember-sprite
• Add caching to speed up incremental builds

Maintained by bguiz.

Additional contributions from:

• Connorhd
• harianus

GPL v3