[ESS @ UM] Rubocop setup

.rubocop.yml

AllCops:
  Include:
    - '**/Rakefile'
    - '**/config.ru'
  Exclude:
    - 'db/**/*'
    - 'config/**/*'
    - 'script/**/*'
    - 'bin/**/*'
    - 'vendor/**/*'

Metrics/LineLength:
  Enabled: false

Style/AlignParameters:
  EnforcedStyle: with_fixed_indentation

Style/ClassAndModuleChildren:
  Enabled: false

Style/Documentation:
  Enabled: false

Style/DotPosition:
  EnforcedStyle: trailing

Style/IfUnlessModifier:
  Enabled: false

Style/PredicateName:
  NamePrefixBlacklist:
    - is_
    - have_

Style/RegexpLiteral:
  MaxSlashes: 0

Style/NumericLiterals:
  Enabled: false

Style/SingleLineBlockParams:
  Enabled: false

Gemfile

group :test do
  gem 'rubocop', require: false
  gem 'rspec-rails'
end

Rakefile

require File.expand_path('../config/application', __FILE__)
Rails.application.load_tasks

if %w(development test).include? Rails.env
  require 'rubocop/rake_task'
  RuboCop::RakeTask.new

  task(:default).clear
  task default: [:rubocop, :spec]
end