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Jammit 0.6.1
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‎index.html‎

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<a href="http://github.com/documentcloud/jammit/">Jammit</a> is an
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industrial strength asset packaging library for <b>Rails</b>, providing
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both the CSS and JavaScript concatenation and compression
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that you'd expect, as well as <b>YUI Compressor</b> and <b>Closure Compiler</b>
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that you'd expect, as well as <b>YUI Compressor</b>, <b>Closure Compiler</b>, and <b>UglifyJS</b>
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compatibility, ahead-of-time gzipping, built-in JavaScript template
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support, and optional <b>Data-URI / MHTML image and font embedding</b>.
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</p>
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<p>
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<b>Current Version:</b> <a href="http://rubygems.org/gems/jammit/">0.6.0</a>
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<b>Current Version:</b> <a href="http://rubygems.org/gems/jammit/">0.6.1</a>
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</p>
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<p>
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<a href="#installation">Installation</a> |
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<a href="#configuration">Configuration</a> |
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<a href="#usage">Usage</a> |
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<a href="#compressors">YUI &amp; Closure</a> |
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<a href="#compressors">YUI, Closure &amp; UglifyJS</a> |
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<a href="#precaching">Precaching Assets</a> <br />
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<a href="#expires">Expires Headers</a> |
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<a href="#embedding">Embedding Assets</a> |
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<p>
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<i>Note: If you don't already have the
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<a href="http://github.com/sstephenson/ruby-yui-compressor">ruby-yui-compressor</a> or
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<a href="http://github.com/documentcloud/closure-compiler">closure-compiler</a>
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<a href="http://github.com/sstephenson/ruby-yui-compressor">ruby-yui-compressor</a>,
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<a href="http://github.com/documentcloud/closure-compiler">closure-compiler</a> or
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<a href="https://github.com/lautis/uglifier">uglifier</a>
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gems installed, downloading make take a minute &mdash; the jar files together
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weigh in at 5 megabytes.</i>
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</p>
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<td><tt>on&nbsp;|&nbsp;off</tt></td>
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<td class="definition">
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Defaults to <b>on</b>. When <b>off</b>, JavaScript and CSS packages
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will be left uncompressed (by YUI or Closure). Disabling compression is only recommended
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will be left uncompressed (by YUI, Closure, or UglifyJS). Disabling compression is only recommended
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if you're packaging assets in development.
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</td>
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</tr>
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</tr>
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<tr>
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<td><b>javascript_compressor</b></td>
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<td><tt>yui&nbsp;|&nbsp;closure</tt></td>
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<td><tt>yui&nbsp;|&nbsp;closure&nbsp;|&nbsp;uglifier</tt></td>
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<td class="definition">
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Defaults to <b>yui</b>. As of <b>0.2.0</b>, the Jammit gem can use either the
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<a href="http://developer.yahoo.com/yui/compressor/">YUI Compressor</a>
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or the
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<a href="http://code.google.com/closure/compiler/">Google Closure Compiler</a>
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Defaults to <b>yui</b>. The Jammit gem can use either the
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<a href="http://developer.yahoo.com/yui/compressor/">YUI Compressor</a>, the
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<a href="http://code.google.com/closure/compiler/">Google Closure Compiler</a>, or
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<a href="https://github.com/mishoo/UglifyJS/">UglifyJS</a>
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to compress your JavaScript.
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</td>
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</tr>
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<td class="definition">
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Pass an options hash directly to the underlying JavaScript compressor
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to configure it. See the
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<a href="http://github.com/sstephenson/ruby-yui-compressor">ruby-yui-compressor</a> or
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<a href="http://github.com/documentcloud/closure-compiler">closure-compiler</a>
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<a href="http://github.com/sstephenson/ruby-yui-compressor">ruby-yui-compressor</a>,
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<a href="http://github.com/documentcloud/closure-compiler">closure-compiler</a>, or
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<a href="https://github.com/lautis/uglifier">uglifier</a>
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gem documentation for the full list of available options.
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</td>
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</tr>
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<pre>require 'jammit'
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Jammit.package!</pre>
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<h2 id="compressors">YUI &amp; Closure</h2>
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<h2 id="compressors">YUI, Closure &amp; UglifyJS</h2>
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<p>
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Jammit can be configured to use either the
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<a href="http://developer.yahoo.com/yui/compressor/">YUI Compressor</a> or the
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<a href="http://code.google.com/closure/compiler/">Google Closure Compiler</a>
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Jammit can be configured to use the
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<a href="http://developer.yahoo.com/yui/compressor/">YUI Compressor</a>, the
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<a href="http://code.google.com/closure/compiler/">Google Closure Compiler</a>, or
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<a href="https://github.com/mishoo/UglifyJS/">UglifyJS</a>
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to compress and optimize your JavaScript. (CSS is always run through the
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YUI Compressor.) Specify the <b>javascript_compressor</b> to choose either <b>yui</b>
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or <b>closure</b> backends. If left blank, Jammit defaults to <b>yui</b>.
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YUI Compressor.) Specify the <b>javascript_compressor</b> to choose either <b>yui</b>,
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<b>closure</b>, or <b>uglifier</b> backends. If left blank, Jammit defaults to <b>yui</b>.
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</p>
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<p>
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You can configure the JavaScript compilation by adding <b>compressor_options</b>
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to your <b>assets.yml</b>. The <b>compressor_options</b>
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will be passed directly to the Gem backend of your chosen compressor. See the
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<a href="http://github.com/sstephenson/ruby-yui-compressor">ruby-yui-compressor</a> or
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<a href="http://github.com/documentcloud/closure-compiler">closure-compiler</a>
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<a href="http://github.com/sstephenson/ruby-yui-compressor">ruby-yui-compressor</a>,
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<a href="http://github.com/documentcloud/closure-compiler">closure-compiler</a>, or
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<a href="https://github.com/lautis/uglifier">uglifier</a>
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gem documentation for all the available options. For example, to configure
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the Closure Compiler to use its
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<a href="http://code.google.com/closure/compiler/docs/compilation_levels.html">advanced optimizations</a>,
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<h2 id="changes">Change Log</h2>
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<p>
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<b class="header">0.6.1</b> &mdash; <small><i>May 25, 2011</i></small><br />
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Jammit now supports <b>UglifyJS</b> as a Java-free alternative to YUI and Closure,
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for JavaScript compression.
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You can now pass <tt>--packages core,embed,ui</tt> to the <tt>jammit</tt>
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command, in order to only build a subset of your asset packages.
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The built-in JS templating function has been upgraded to the equivalent of
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the latest <tt>_.template</tt>.
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Environment-specific settings are now supported in your <tt>assets.yml</tt> file.
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</p>
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<p>
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<b class="header">0.6.0</b><br />
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You can now pass <tt>debug_assets=true</tt> as a query parameter to debug

‎jammit.gemspec‎

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Gem::Specification.new do |s|
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s.name = 'jammit'
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s.version = '0.6.0' # Keep version in sync with jammit.rb
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s.date = '2010-11-08'
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s.version = '0.6.1' # Keep version in sync with jammit.rb
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s.date = '2011-05-25'
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s.homepage = "http://documentcloud.github.com/jammit/"
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s.summary = "Industrial Strength Asset Packaging for Rails"

‎lib/jammit.rb‎

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# to all of the configuration options.
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module Jammit
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VERSION = "0.6.0"
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VERSION = "0.6.1"
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ROOT = File.expand_path(File.dirname(__FILE__) + '/..')
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‎lib/jammit/command_line.rb‎

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opts.on('-f', '--force', 'force a rebuild of all assets') do |force|
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@options[:force] = force
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end
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opts.on('-p', '--packages PACKAGE_NAMES', 'comma-separated list of packages (ex: "core,embed", default: all packages)') do |package_names|
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opts.on('-p', '--packages LIST', 'list of packages to build (ex: "core,ui", default: all)') do |package_names|
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@options[:package_names] = package_names.split(/,\s*/).map {|n| n.to_sym }
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end
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opts.on_tail('-v', '--version', 'display Jammit version') do

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