Goes inside /.git/hooks

prepare-commit-msg

#!/bin/bash

if [ -z "$BRANCHES_TO_SKIP" ]; then
  BRANCHES_TO_SKIP=(master develop test)
fi


BRANCH_NAME=$(git symbolic-ref --short HEAD)
#echo $BRANCH_NAME

JIRA_NUMBER=$(echo $BRANCH_NAME | sed -ne 's/.*\/\([A-Z]\{1,6\}-[0-9]\{1,6\}\).*/\1/p')
#echo $JIRA_NUMBER

IS_BRANCH_EXCLUDED=$(printf "%s\n" "${BRANCHES_TO_SKIP[@]}" | grep -c "^$BRANCH_NAME$")
#echo $IS_BRANCH_EXCLUDED


if [ -n "$JIRA_NUMBER" ] && ! [[ $IS_BRANCH_EXCLUDED -eq 1 ]]; then 
  sed -i.bak -e "1s/^/$JIRA_NUMBER /" $1
fi