Test/Lint only what matters
I mean, every thing matters. But, that’s why we have CI, when you’re working a very large project usually is very hard to run all the tests or lint all the files of the project locally.
But would be nice to run tests/lint only for the files I changed/created on your feature branch, right?! Right!?
What files did I change in my feature branch?
I just recently learned that it’s quite easy to check what files you changed in
your feature branch with git diff --name-only master. Having this power, now
you can easily chain that to your linter or testing tool, like:
git diff --name-only master | grep '.rb' | xargs bundle exec rubocop
git diff --name-only master | grep '_spec.rb' | xargs bundle exec rspec
That’s it. That’s the post.
It’s very simple, but on the other hand very helpful on large projects. I created aliases for these examples and my development workflow is faster now. I hope it help you as well.