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Manuals / Git & GitHub / Chapter 10

D · Automate · advanced · Day 7–8 · Chapter 10 of 12

Git hooks — pre-commit & pre-push

Hooks run scripts at Git lifecycle events. pre-commit: lint/format. pre-push: tests. Husky or plain .git/hooks.

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Step 1 of 3

Simple pre-commit hook

Executable script in .git/hooks/pre-commit. Exit 1 blocks commit. Test in practice repo.

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Example

#!/bin/sh
# .git/hooks/pre-commit
if ! grep -q "." README.md 2>/dev/null; then
  echo "README must not be empty"
  exit 1
fi

Do this now

Hook that rejects commits if README is empty.

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Chapter learning outcomes
  • Hook scripts in .git/hooks
  • pre-commit framework
  • Husky for Node projects
  • CI vs local hooks

Clear these before you leave

Side quest

pre-push tests

pre-push hook runs pytest or npm test before push.