Git Hook to prepend a commit message with the Jira ticket id at the start of the current branch's name

prepare-commit-message

#!/usr/bin/env bash

branchname=$(git branch | grep ^* | sed 's/\* //g')
regex="([A-Z]*-[0-9]*)"

if [[ $branchname =~ $regex ]]
then
  ticket_id="${BASH_REMATCH[1]}"
  message=`cat $1`

  if [[ $message == $ticket_id* ]] || [[ $message == "fixup! "* ]]
  then
    exit
  fi

  echo "$ticket_id $message" > $1
fi