Git Commit Hook to add branch name to commit

prepare-commit-msg

# commit hook to prepend the JIRA ticket from the branch name to the commit
# Installation for one repo:
# - copy this file into your git repo's .git/hooks folder
# - make sure its executable:
#   chmod a+x repo-path/.git/hooks/prepare-commit-msg
# Installation for all new repos: (you'll still have to do the above for already cloned repos)
# - tell git where your global hooks live:
#    git config --global init.templatedir '~/.git-templates'
# - mkdir -p ~/.git-templates/hooks
# - copy this file to ~/.git-templates/hooks
# - make sure its executable:
#   chmod a+x ~/.git-templates/hooks/prepare-commit-msg

# you can customize which branches should be skipped when
if [ -z "$BRANCHES_TO_SKIP" ]; then
  BRANCHES_TO_SKIP=(master)
fi
BRANCH_NAME=$(git symbolic-ref --short HEAD)
BRANCH_NAME="${BRANCH_NAME##*/}"

BRANCH_EXCLUDED=$(printf "%s\n" "${BRANCHES_TO_SKIP[@]}" | grep -c "^$BRANCH_NAME$")
TICKET_NUMBER_REGEX="[a-zA-Z][a-zA-Z2]*[-][0-9][0-9]*"

if [ -n "$BRANCH_NAME" ] && ! [[ $BRANCH_EXCLUDED -eq 1 ]] && [[ $BRANCH_NAME =~ $TICKET_NUMBER_REGEX ]]
then
  TICKET_NUMBER=$BASH_REMATCH
  TICKET_IN_COMMIT=$(grep -c "$TICKET_NUMBER" $1)

  if ! [[ $TICKET_IN_COMMIT -ge 1 ]]
  then
    printf "Prepending branch name to commit message...\n"
    sed -i.bak -e "1s/^/$TICKET_NUMBER /" $1;
  fi
fi