Git Diff Matches Paths 📁

Today I learned that the git-diff command accepts a <path> argument. I used this knowledge to construct a command that runs only the RSpec test files on my branch that differ from master.

(not-master)$ git diff master --name-only spec | xargs rspec

This is handy on a big test suite; when you can't run every test, make sure you run the ones that you have changed.

See man git-diff for more info.

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