prepend Jira ticket numbers to commit messages

commit-msg

#!/bin/bash
#
# .git/hooks/commit-msg is run when the -m flag is used
#
# Will extract Jira style ticket numbers from branch names e.g.
#   'AB-123-my-cool-branch' --> '[AB-123]'
#   'feature/XZ-321-my-cool-branch' --> '[XZ-321]'
#
TICKET=[$(git rev-parse --abbrev-ref HEAD | grep -Eo '^(\w+/)?(\w+[-_])?[0-9]+' | grep -Eo '(\w+[-])?[0-9]+' | tr "[:lower:]" "[:upper:]")]
if [[ $TICKET == "[]";then
  exit 0;
fi
# prepends the ticket captured above to the message passed e.g.
#  git commit -m "fixed a bug" --> "[AB-123] fixed a bug"
echo "$TICKET " >> "$1"

prepare-commit-msg

#!/bin/bash
#
# .git/hooks/prepare-commit-msg is run when the -m flag is NOT used
#
# Will extract Jira style ticket numbers from branch names e.g.
#   'AB-123-my-cool-branch' --> '[AB-123]'
#   'feature/XZ-321-my-cool-branch' --> '[XZ-321]'
#
FILE=$1
MESSAGE=$(cat $FILE)
TICKET=[$(git rev-parse --abbrev-ref HEAD | grep -Eo '^(\w+/)?(\w+[-_])?[0-9]+' | grep -Eo '(\w+[-])?[0-9]+' | tr "[:lower:]" "[:upper:]")]
if [[ $TICKET == "[]" || "$MESSAGE" == "$TICKET"* ]];then
  exit 0;
fi
# prepends the ticket captured above to the message file
echo "$TICKET $MESSAGE" > $FILE

Uses bits of code from https://betterprogramming.pub/how-to-automatically-add-the-ticket-number-in-git-commit-message-bda5426ded05