Ruby Style Guide

What is Ruby Style Guide?

Ruby is the main language at Shopify. We are primarily a Ruby shop and we are probably one of the largest out there. Ruby is the go-to language for new web projects and scripting.

This Style Guide is the result of over a decade of Ruby development at Shopify. Much of its content is based on Bozhidar Batsov's Ruby Style Guide, adapted to Shopify by many contributors.

Installing Rubocop to Your Project

$ gem install rubocop

Now lets create a program that can be linted better

name = "Karthik"puts "Hello #{name}"

Now we save it and run Rubocop on it as shown:

$ rubocop rubocop_example.rb

rubocop spits out some errors as shown

Inspecting 1 file
C

Offenses:

rubocop_example.rb:1:1: C: [Correctable] Style/FrozenStringLiteralComment: Missing frozen string literal comment.name = "Karthik"^rubocop_example.rb:1:8: C: [Correctable] Style/StringLiterals: Prefer single-quoted strings when you don't need string interpolation or special symbols.name = "Karthik"       ^^^^^^^^^1 file inspected, 2 offenses detected, 2 offenses auto-correctable

- Create a .yml file in the root and paste this:

AllCops:  NewCops: enable  Exclude:    - 'db/migrate/*.rb'    - 'config/**/*.rb'    - 'bin/*'    - 'spec/rails_helper.rb'    - 'lib/**/*.rb' #it should be fixed later    - 'spec/lib/**/*.rb' #it should be fixed later    - 'spec/requests/**/*.rb' #it should be fixed laterMetrics/BlockLength:  Exclude:    - 'Rakefile'    - '**/*.rake'    - 'spec/**/*.rb'    - 'app/admin/**/*.rb'    - 'db/**/*.rb'    - 'db/migrate/*.rb'    - 'config/*.rb'Documentation:  Include:    - 'app/models/**/*.rb'  Exclude:    - 'app/models/ability.rb'    - 'app/models/application_record.rb'    - 'app/models/concerns/**'    - 'app/models/filter_client.rb'    - 'app/models/filter_warehouse.rb'Metrics/MethodLength:  Max: 12Metrics/ClassLength:  Max: 1000

That's all; Rubocop is now ready to work on your project!

Thank you for reading!

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