A commit hook is a script that git executes automatically before or after a specific event in the version control lifecycle like committing, pushing or merging.
You can have pre-commit hooks (prevention) and/or post-commit hooks (notifications or automation). A pre-commit hook is arguably more common, running after entering a git commit, with the cabability to abort the commit if certain quality standards aren't met such as linting rules, unit or smoke tests. If the hook outcome passes, git proceeds with the commit as normal, if not, git immediately aborts the commit, and the code stays in your staging area so you can fix it.
You can have pre-commit hooks (prevention) and/or post-commit hooks (notifications or automation). A pre-commit hook is arguably more common, running after entering a git commit, with the cabability to abort the commit if certain quality standards aren't met such as linting rules, unit or smoke tests. If the hook outcome passes, git proceeds with the commit as normal, if not, git immediately aborts the commit, and the code stays in your staging area so you can fix it.
