I converted .erb files to .haml using erb2haml in Ruby on Rails, so I’ll introduce the method.

Steps to Convert .erb Files to .haml

Installing gem haml-rails, erb2haml

First, add haml-rails and erb2haml to your Gemfile and run bundle install.

Gemfile

# Use Haml for template engine
gem 'haml-rails'

group :development do
  # Convert .erb -> .haml
  gem 'erb2haml'
end

Batch Convert from .erb to .haml with erb2haml

Once erb2haml is installed, run the following rake task that becomes available:

rake haml:replace_erbs

Here are the execution results:

After converting ERB files to Haml, it deletes the .erb files.

Looking for ERB files to convert to Haml...
Converting: app/views/home/index.html.erb... Done!
Removing: app/views/home/index.html.erb... Removed!
Converting: app/views/layouts/application.html.erb... Done!
Removing: app/views/layouts/application.html.erb... Removed!
Converting: app/views/layouts/mailer.html.erb... Done!
Removing: app/views/layouts/mailer.html.erb... Removed!
Converting: app/views/layouts/mailer.text.erb... Done!
Removing: app/views/layouts/mailer.text.erb... Removed!

That’s all from the Gemba where we quickly converted from ERB to Haml using erb2haml.