compiler.rake

unless defined? Rails
  require 'pathname'
  require 'sprockets'
  require 'yui/compressor'

  namespace :assets do

    def write_asset(target,asset)
      path_for(asset).tap do |path|
        filename = target.join(path)
        FileUtils.mkdir_p File.dirname(filename)
        puts "Generating #{asset.logical_path} -> #{filename}"
        asset.write_to(filename)
        asset.write_to("#{filename}.gz") if filename.to_s =~ /\.(css|js)$/
      end
    end

    def path_for(asset)
      asset.logical_path =~ /\.html$/ ? asset.logical_path : asset.digest_path
    end

    def compile_path?(logical_path)
      /(?:\/|\\|\A)application\.(css|js)$/ =~ logical_path ||
      logical_path =~ /\.html$/
    end

    desc "Compile all the assets named in config.assets.precompile"
    task :compile do

      require $ROOT.join("lib/rack_application")
      app     = RackApplication.new($ROOT)
      env     = app.assets

      env.js_compressor = YUI::JavaScriptCompressor.new(munge: true,
          optimize: true)
      # env.css_compressor = YUI::CssCompressor.new


      target  = app.public_path

      system "rm -rf #{target}/*"

      manifest = {}
      env.each_logical_path do |logical_path|
        next unless compile_path?(logical_path)
        if asset = env.find_asset(logical_path)
          manifest[logical_path] = write_asset(target,asset)
        end
      end

      File.open("#{target}/manifest.yml", 'wb') do |f|
        YAML.dump(manifest, f)
      end


    end
  end
end