Run Rubocop in CI without all the build. This container will take a folder of Ruby code and test it with Rubocop. It was built so that we could build our applications and run Rubocop against them in CI without having to install the rest of our bundle.
Mount your project at /app in the image and let Rubocop run wild:
docker run --rm --volume "$PWD:/app" cagedata/rubocop
You can also pass any arguments into the container just like running the regular Rubocop binary:
# Only runs lint cops on only the Gemfile
docker run --rm --volume "$PWD:/app" --lint Gemfile
If a .rubocop.yml config file is found in the root of your project, the
image will pick it up for the tests.