runs rubocop for changed files, can be used as pre-commit hook
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Latest commit 867d509 Apr 9, 2018


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This gem provides means of running rubocop including auto-correct on all files which are currently staged in git. This can be easily used as pre-commit hook with the included template.

If rubocop can fix all detected issues itself via autocorrect it will will do so. The commit will abort in this situation. In case rubocop accepts all code changes the commit continues.

Although this gem has no tests it's pretty battle tested and is in use at runtastic since years.


Add these lines to your application's Gemfile:

group :development do
  gem 'rubocop_runner', '~> 2.0', require: false

And then execute:

$ bundle


To create a rubocop runner pre-commit hook once just run

ruby -rrubocop_runner -e "RubocopRunner.install"

To make it easy for every developer on the project you can also add this to your Rakefile:

require 'rubocop_runner/rake_task'

Afterwards, just run the rake rubocop:install task to install the pre-commit hook.


  • add tests
  • improve gem structure


After checking out the repo, run bin/setup to install dependencies. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at


The gem is available as open source under the terms of the MIT License.