Add luarocks installer.

lib/sprinkle/installers/luarocks.rb

@@ -0,0 +1,39 @@
+module Sprinkle
+  module Installers
+    # The luarocks package installer installs Lua modules.
+    #
+    #
+    # == Example Usage
+    #
+    # A simple installation:
+    #
+    #   package :magic_beans do
+    #     description "Beans beans they're good for your heart..."
+    #     luarocks 'magic_beans'
+    #   end
+    #
+    # You may also specify multiple packages as an array:
+    #
+    #   package :magic_beans do
+    #     luarocks %w(magic_beans magic_sauce)
+    #   end
+    #
+    class LuaRocks < Installer
+
+      ##
+      # installs the luarocks passed
+      # :method: luarocks
+      # :call-seq: luarocks(*packages)
+      auto_api
+
+      protected
+
+        def install_commands #:nodoc:
+          # `luarocks` does not accept multiple packages.
+          cmds = @packages.map { |p| "#{sudo_cmd}luarocks install #{p}" }
+          cmd = cmds.join('; ')
+        end
+
+    end
+  end
+end