Pyupgrade in CI

pyupgrade_ci.md

How run pyupgrade in CI (real usecase)

Here is a workaround for pyupgrade's lack of --check option (one of many related issues) and folder scanning (related issue).

find . -type f -name "*.py" -exec pyupgrade --py38-plus {} \;
test $(git status --porcelain | wc -l) = 0

You can use this in any CI platform like GitHub Actions

Explanation:

1. The first line recursively searches current directory for any .py files and applies pyupgrade --py38-plus to each found file
2. The second line uses git status to list all files modified by pyupgrade, and if there is even one, fails with a non-zero exit code (author: @hugovk)