Add a command line option to specify the guardfile

lib/core_ext/hash_with_indifferent_access.rb

@@ -0,0 +1,9 @@
+class Thor
+  module CoreExt #:nodoc:
+    class HashWithIndifferentAccess < ::Hash #:nodoc:
+      def has_key?(key)
+        super(convert_key(key))
+      end
+    end
+  end
+end

lib/guard.rb

@@ -1,3 +1,5 @@
+require 'core_ext/hash_with_indifferent_access'
+
 module Guard
 
   autoload :UI,           'guard/ui'

lib/guard/cli.rb

@@ -10,6 +10,8 @@ module Guard
     method_option :debug,  :type => :boolean, :default => false, :aliases => '-d', :banner => "Print debug messages"
     method_option :group,  :type => :array,   :default => [],    :aliases => '-g', :banner => "Run only the passed groups"
 
+    method_option :guardfile, :type => :string,  :default => './Guardfile', :aliases => '-C', :banner => "Specify a Guardfile"
+
     desc "start", "Starts Guard"
     def start
       ::Guard.start(options)