The following file doesn't work for me when running rubocop.

rubocop.yml

require: rubocop-rails

inherit_from:
  - http://www.example.com/rubocop.yml
  - ../.rubocop.yml

AllCops:
  Exclude:
    - 'db/**/*'
    - 'config/**/*'
    - 'script/**/*'
    - 'bin/{rails,rake}'
    - 'vendor/**/*'
    - 'spec/fixtures/**/*'
    - 'spec/views/**/*'
    - 'spec/support/**/*.rb'
    - 'spec/support/*.rb'
    - !ruby/regexp /old_and_unused\.rb$/

LineLength:
  Description: Limit lines to 79 characters.
  Enabled: false
  Max: 79

Style/MixinUsage:
  Exclude:
    - 'spec/support/warden.rb'

Style/Encoding:
  Enabled: false

Metrics/LineLength:
  Enabled: false