Extension manager command (a trivial front-end for the gem command)

lib/compass/commands.rb

@@ -4,8 +4,9 @@ end
 require 'compass/commands/registry'
 
 %w(base generate_grid_background default help list_frameworks project_base
-   update_project watch_project create_project clean_project imports installer_command
-   print_version project_stats stamp_pattern sprite validate_project
-   write_configuration interactive unpack_extension).each do |lib|
+   update_project watch_project create_project clean_project extension_command
+   imports installer_command print_version project_stats stamp_pattern
+   sprite validate_project write_configuration interactive unpack_extension
+).each do |lib|
   require "compass/commands/#{lib}"
 end

lib/compass/commands/extension_command.rb

@@ -0,0 +1,60 @@
+require 'fileutils'
+require 'compass/commands/base'
+
+module Compass
+  module Commands
+    module ExtensionsOptionParser
+      def set_options(opts)
+        opts.banner = %Q{
+Usage: compass extension install EXTENSION_NAME [options]
+       compass extension uninstall EXTENSION_NAME [options]
+       compass extension list
+
+Description:
+  Manage the list of extensions on your system.
+  Compass to all of your compass projects.
+
+Example:
+  compass extension install sassy-buttons
+  compass extension uninstall sassy-buttons
+
+}
+        super
+      end
+    end
+
+    class ExtensionCommand < Base
+
+      register :extension
+
+      class << self
+        def option_parser(arguments)
+          parser = Compass::Exec::CommandOptionParser.new(arguments)
+          parser.extend(ExtensionsOptionParser)
+        end
+        def usage
+          option_parser([]).to_s
+        end
+        def description(command)
+          "Manage the list of compass extensions on your system"
+        end
+        def parse!(arguments)
+          {:arguments => arguments}
+        end
+      end
+      include InstallerCommand
+
+      def initialize(working_path, options)
+        super(working_path, options)
+      end
+
+      # all commands must implement perform
+      def perform
+        require 'rubygems/gem_runner'
+        Gem::GemRunner.new.run(options[:arguments])
+      end
+
+    end
+  end
+end
+