.erb or .rb, you're coming with me.

— RuboCop

Ruumba is RuboCop's sidekick, allowing you to lint your .erb Rubies as well as your regular-type ones.

• Ruby 2.2.2+

λ gem install ruumba

Command line:

λ ruumba directory_of_erb_files/

Rake task:

require 'ruumba/rake_task'

Ruumba::RakeTask.new(:ruumba) do |t|
  t.dir = %w(lib/views)
end

Then:

λ bundle exec rake ruumba

By default, Rubocop only scan .rb files and so does Ruumba. If you want shown paths to reflect original paths, you can add create a .ruumba.yml config file with the following contents:

AllCops:
  Include:
    - '**/*.erb'

You can then disable .rb extension auto-append and use your config file:

λ ruumba -D -e app/views -c .ruumba.yml

Since Ruumba rewrites new files form .erb files contents, some formatting cops cannot apply, you can disable them in your Ruumba file:

Style/FrozenStringLiteralComment:
  Enabled: false
Layout/AlignHash:
  Enabled: false
Layout/AlignParameters:
  Enabled: false
Layout/IndentationWidth:
  Enabled: false
Layout/TrailingBlankLines:
  Enabled: false

You can use ruumba -a or ruumba -D to look for other cops if this list is missing some.

You might want to include your existing rubocop config file by appending this in front of your Ruumba config:

inherit_from: .rubocop.yml

1. Branch (git checkout -b fancy-new-feature)
2. Commit (git commit -m "Fanciness!")
3. Test (bundle exec rake spec)
4. Lint (bundle exec rake rubocop)
5. Push (git push origin fancy-new-feature)
6. Ye Olde Pulle Requeste