Added HAML as a template engine option to devise_views generator (-t or --engine). HAML files are created based on the erb files on the fly using 'html2haml' command that comes with HAML.

Signed-off-by: José Valim <jose.valim@gmail.com>

lib/generators/devise_views/devise_views_generator.rb

@@ -1,14 +1,43 @@
 class DeviseViewsGenerator < Rails::Generators::Base
   desc "Copies all Devise views to your application."
-
+  
   argument :scope, :required => false, :default => nil,
                    :desc => "The scope to copy views to"
-
+  
+  class_option :engine, :type => :string, :aliases => "-t", :default => "erb",
+                        :desc => "Template engine for the views. Available options are 'erb' and 'haml'."
+  
   def self.source_root
     @_devise_source_root ||= File.expand_path("../../../../app/views", __FILE__)
   end
 
   def copy_views
-    directory "devise", "app/views/devise/#{scope}"
+    case options[:engine]
+    when "erb"
+      directory "devise", "app/views/devise/#{scope}"
+    when "haml"
+      require 'haml'
+      create_and_copy_haml_views
+    end
+  end
+  
+  protected
+  
+  def create_and_copy_haml_views
+    devise_html_source_root = "#{DeviseViewsGenerator.source_root}/devise"
+    devise_haml_source_root = "#{DeviseViewsGenerator.source_root}/devise-haml"
+    
+    Dir["#{devise_html_source_root}/**/*"].each do |path|
+      relative_path = path.sub(devise_html_source_root, "")
+      source_path   = (devise_haml_source_root + relative_path).sub(/erb$/, "haml")
+      
+      if File.directory?(path)
+        FileUtils.mkdir_p source_path
+      else
+        `html2haml -r #{path} #{source_path}`
+      end
+    end
+    
+    directory devise_haml_source_root, "app/views/devise/#{scope}"
   end
 end