在 Rails 專案裡使用：
Gemfile:
gem 'erb2haml'
記得安裝
bundle install
看看 erb2haml 提供了什麼功能:
rake -T
rake haml:convert_erbs # Perform bulk conversion of all html.erb files to Haml in views folder
rake haml:replace_erbs # Perform bulk conversion of all html.erb files to Haml in views folder, then remove the converted html.erb files
開始轉換
$ rake haml:replace_erbs
Looking for ERB files to convert to Haml...
Converting: app/views/layouts/application.html.erb... Done!
Removing: app/views/layouts/application.html.erb... Removed!
轉換成功！