Added support for generating Slim view templates.

lib/generators/devise/views_generator.rb

@@ -8,7 +8,7 @@ module Devise
                        :desc => "The scope to copy views to"
 
       class_option :template_engine, :type => :string, :aliases => "-t",
-                                     :desc => "Template engine for the views. Available options are 'erb' and 'haml'."
+                                     :desc => "Template engine for the views. Available options are 'erb', 'haml' and 'slim'."
 
       def copy_views
         case options[:template_engine].to_s
@@ -16,6 +16,12 @@ module Devise
           verify_haml_existence
           verify_haml_version
           create_and_copy_haml_views
+        when "slim"
+          verify_haml_existence
+          verify_haml_version
+          verify_haml2slim_existence
+          verify_haml2slim_version
+          create_and_copy_slim_views
         else
           directory "devise", "app/views/#{scope || :devise}"
         end
@@ -27,37 +33,72 @@ module Devise
         begin
           require 'haml'
         rescue LoadError
-          say "HAML is not installed, or it is not specified in your Gemfile."
+          say "Haml is not installed, or it is not specified in your Gemfile."
+          exit
+        end
+      end
+
+      def verify_haml2slim_existence
+        begin
+          require 'haml2slim'
+        rescue LoadError
+          say "Haml2Slim is not installed, or it is not specified in your Gemfile."
           exit
         end
       end
 
       def verify_haml_version
-        unless Haml.version[:major] == 2 and Haml.version[:minor] >= 3 or Haml.version[:major] >= 3
-          say "To generate HAML templates, you need to install HAML 2.3 or above."
+        unless Haml.version[:major] == 2 && Haml.version[:minor] >= 3 || Haml.version[:major] >= 3
+          say "To generate Haml or Slim templates, you need to have Haml 2.3 or above installed."
+          exit
+        end
+      end
+
+      def verify_haml2slim_version
+        unless Haml2Slim::VERSION.to_f >= '0.4.0'.to_f
+          say "To generate Slim templates, you need to have Haml2Slim 0.4.0 or above installed."
           exit
         end
       end
 
       def create_and_copy_haml_views
-        require 'tmpdir'
-        html_root = "#{self.class.source_root}/devise"
+        directory haml_tmp_root, "app/views/#{scope || :devise}"
 
-        Dir.mktmpdir("devise-haml.") do |haml_root|
-          Dir["#{html_root}/**/*"].each do |path|
-            relative_path = path.sub(html_root, "")
-            source_path   = (haml_root + relative_path).sub(/erb$/, "haml")
-
-            if File.directory?(path)
-              FileUtils.mkdir_p(source_path)
-            else
-              `html2haml -r #{path} #{source_path}`
-            end
-          end
-
-          directory haml_root, "app/views/#{scope || :devise}"
-        end
+        FileUtils.rm_rf(haml_tmp_root)
       end
+
+      def create_and_copy_slim_views
+        slim_tmp_root = Dir.mktmpdir("devise-slim.")
+        `haml2slim #{haml_tmp_root} #{slim_tmp_root}`
+
+        directory slim_tmp_root, "app/views/#{scope || :devise}"
+
+        FileUtils.rm_rf(haml_tmp_root)
+        FileUtils.rm_rf(slim_tmp_root)
+      end
+
+    private
+
+      def create_haml_views
+        require 'tmpdir'
+        html_root     = "#{self.class.source_root}/devise"
+        haml_tmp_root = Dir.mktmpdir("devise-haml.")
+
+        Dir["#{html_root}/**/*"].each do |path|
+          relative_path = path.sub(html_root, "")
+          source_path   = (haml_tmp_root + relative_path).sub(/erb$/, "haml")
+
+          if File.directory?(path)
+            FileUtils.mkdir_p(source_path)
+          else
+            `html2haml -r #{path} #{source_path}`
+          end
+        end
+
+        haml_tmp_root
+      end
+
+      alias :haml_tmp_root :create_haml_views
     end
   end
 end