Listener feedback. This is the Git hook example. Save it as **.git /hook/pre-commit** in a valid Git repository, and make it executable with **chmod +x .git /hook/pre- commit**. It gets called any time you tell Git to commit a file, and replaces **foo** with **bar** before committing the file. #!/bin/sh sed -i 's/foo/bar/g' $(git diff --cached --name-only) shasum -a256=dd70fa34505149d1156b725951d0f611190f8c8dea1b1cdc7739d348d33da3b0