Move precompilation task to Rakefile

bin/gollum

@@ -104,9 +104,6 @@ MSG
   opts.on("--assets [PATH]", "Set the path to look for static assets. Only used if --static is set to true, or environment is production/staging. Default: ./public/assets") do |path|
     wiki_options[:static_assets_path] = path
   end
-  opts.on("--precompile-assets [PATH]", "Precompile static assets to PATH.") do |path|
-    options[:precompile] = path || './public/assets'
-  end
   opts.on("--css", "Inject custom CSS into each page. The '<git-repo>/custom.css' file is used (must be committed).") do
     wiki_options[:css] = true
   end
@@ -262,20 +259,6 @@ if options[:irb]
     puts "Invalid Gollum wiki at #{File.expand_path(gollum_path).inspect}"
     exit 0
   end
-elsif options[:precompile]
-  require 'gollum/app'
-  env = Precious::Assets.sprockets
-  manifest = Sprockets::Manifest.new(env, options[:precompile])
-    Sprockets::Helpers.configure do |config|
-      config.environment = env
-      config.environment.context_class.class_variable_set(:@@base_url, wiki_options[:base_path])
-      config.prefix      = "#{wiki_options[:base_path]}/#{Precious::Assets::ASSET_URL}"
-      config.digest      = true
-      config.public_path = options[:precompile]
-      config.manifest    = manifest
-    end
-  puts "Precompiling assets to #{::File.expand_path(options[:precompile])}..."
-  manifest.compile(Precious::Assets::MANIFEST)
 else
   require 'gollum/app'
   Precious::App.set(:gollum_path, gollum_path)