Syntax :

Static analysis

Security

https://github.com/presidentbeef/brakeman

Styleguide

https://github.com/bbatsov/rubocop

Test

https://github.com/relevance/rcov

https://github.com/colszowka/simplecov

https://github.com/makaroni4/sandi_meter

https://github.com/YorickPeterse/ruby-lint

https://github.com/whitesmith/rubycritic

https://github.com/railsbp/rails_best_practices

https://github.com/troessner/reek

https://github.com/metricfu/metric_fu

Quality

Saas

https://codeclimate.com

https://www.pullreview.com

https://houndci.com

Convert

 FactoryGirl.create :category

 post = create(:category)

Factory girl

RSpec

 true.should == true

 expect(true).to be_truthy

Rails

AST

http://synvert-tools.herokuapp.com/

https://github.com/xinminlabs/synvert-core/

https://github.com/xinminlabs/synvert-snippets/

Demo Sharetribe

https://github.com/sharetribe/sharetribe

Custom snippet

Synvert::Rewriter.new 'ruby', 'new_safe_navigation_operator' do
  if Gem::Version.new(RUBY_VERSION.dup) >= Gem::Version.new("2.2.0")
    within_files '**/*.rb' do
      within_node type: 'send', message: 'try!' do
        replace_with "{{receiver}}.?{{arguments.first.to_source}}"
      end
    end
  end
end

u && u.profile && u.profile.thumbnails 
  && u.profiles.thumbnails.large
=> u.?profile.?thumbnails.?large

u.try!(:profile).try!(:thumbnails).try!(:large)
=> u.?profile.?thumbnails.?large

Perfs

https://speakerdeck.com/sferik/writing-fast-ruby