support color on windows

Gemfile

@@ -12,3 +12,6 @@ if Config::CONFIG['target_os'] =~ /linux/i
   gem 'rb-inotify', '>= 0.5.1'
   gem 'libnotify',  '~> 0.1.3'
 end
+if Config::CONFIG['target_os'] =~ /mswin|mingw/i
+  gem 'win32console'
+end

lib/guard/ui.rb

@@ -2,6 +2,29 @@ module Guard
   module UI
     class << self
 
+      @color_enabled = true
+      @color_tested = false
+      @new_line = "\r"
+
+      def color_enabled?
+        if !@color_tested
+          @color_tested = true
+          if Config::CONFIG['target_os'] =~ /mswin|mingw/i
+            @new_line = "\r\n"
+            unless ENV['ANSICON']
+              begin
+                require 'rubygems' unless ENV['NO_RUBYGEMS']
+                require 'Win32/Console/ANSI'              
+              rescue LoadError
+                @color_enabled = false
+                info "You must 'gem install win32console' to use color on Windows"              
+              end
+            end
+          end
+        end
+        return @color_enabled
+      end
+      
       def info(message, options = {})
         unless ENV["GUARD_ENV"] == "test"
           reset_line if options[:reset]
@@ -24,7 +47,11 @@ module Guard
       end
 
       def reset_line
-        print "\r\e[0m"
+        if color_enabled?        
+          print @new_line + "\e[0m"
+        else
+          print @new_line
+        end
       end
 
       def clear
@@ -38,7 +65,11 @@ module Guard
       end
 
       def color(text, color_code)
-        "#{color_code}#{text}\e[0m"
+        if color_enabled?
+          return "#{color_code}#{text}\e[0m"
+        else
+          return text
+        end
       end
 
     end