Snockets

A JavaScript/CoffeeScript concatenation tool for Node.js inspired by Sprockets. Used by connect-assets to create a Rails 3.1-style asset pipeline.

Written in CoffeeScript by the author of CoffeeScript: Accelerated JavaScript Development.

Usage (script-side)

In your CoffeeScript files, write Sprockets-style comments to indicate dependencies, e.g.

#= require dependency

(or //= require dependency in JavaScript). If you want to bring in a whole folder of scripts, use

#= require_tree dir

Usage (Node-side)

First,

npm install snockets

Then in your app:

Snockets = require 'snockets'
snockets = new Snockets()

Each Snockets instance has a depGraph property, an instance of dep-graph. You can scan a file to just update the dependency graph:

snockets.scan 'dir/foo.coffee', (err, depGraph) -> ...

To get a list of filenames showing the series of dependencies the scanned file has, you'd use depGraph.getChain 'dir/foo.coffee'.

You can get a list of compiled JavaScripts corresponding to the dependency chain (starting from the first required file to the requested file) using getCompiledChain:

snockets.getCompiledChain 'dir/foo.coffee', (err, jsList) -> ...

The result is in the format [{filename: "dependency1.js", js: "// code"}, ...]. Note that those JavaScript files are not actually created by getCompiledChain.

Snockets can also provide a single compiled, concatenated file (optionally run through UglifyJS if the minify option is passed in):

snockets.getConcatenation 'dir/foo.coffee', minify: true, (err, js) -> ...

Note that you don't need to scan before or after running getCompiledChain or getConcatenation; they update the dependency graph the same way that scan does.

Synchronous mode

By default, Snockets uses only async file methods. You can pass the option async: false to either of its methods if you want it to be synchronous instead. In synchronous mode, you can use either callbacks or return values, e.g.

js = snockets.getConcatenation 'dir/foo.coffee', async: false

License

©2011 Trevor Burnham and available under the MIT license:

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.