Add Gemfile to the rails application generator

railties/lib/rails/generators/rails/app/app_generator.rb

@@ -54,6 +54,7 @@ module Rails::Generators
       copy_file "Rakefile"
       copy_file "README"
       copy_file "config.ru"
+      template "Gemfile"
     end
 
     def create_app_files

railties/lib/rails/generators/rails/app/templates/Gemfile

@@ -0,0 +1,10 @@
+# Gemfile is where you list all of your application's dependencies
+#
+gem "rails", "<%= Rails::VERSION::STRING %>"
+#
+# Bundling edge rails:
+# gem "rails", "<%= Rails::VERSION::STRING %>", :git => "git://github.com/rails/rails.git"
+
+# You can list more dependencies here
+# gem "nokogiri"
+# gem "merb" # ;)