Pre-commit hook for adding ticket automatically to commit messages

commit-msg git hook

# Save this to your git repo at .git/hooks/commit-msg

#!/bin/bash

set -e

FILE=$1
MESSAGE=$(cat "$FILE")
BRANCH=$(git rev-parse --abbrev-ref HEAD)

# Extract ticket from branch: handles feat/PRJ-123-... or PRJ-123-... patterns
TICKET=$(echo "${BRANCH#*/}" | grep -oiE '^[A-Z]+-[0-9]+' | tr '[:lower:]' '[:upper:]' || true)

# Only prepend if we found a ticket and message doesn't already start with one
if [ -n "$TICKET" ] && ! echo "$MESSAGE" | grep -qE '^[A-Z]+-[0-9]+:? '; then
  echo "$TICKET: $MESSAGE" > "$FILE"
fi