Prefix Commit Messages with "[PROJECT_NAME_IN_CAPS]-[TICKET_NUMER]" from Branch Name

prepare-commit-msg

#!/bin/bash

# SOURCE: https://git-scm.com/docs/githooks
# SOURCE: https://gist.github.com/bartoszmajsak/1396344

# get the branch name
BRANCH_NAME=$(git rev-parse --abbrev-ref HEAD 2> /dev/null)

if [ "$BRANCH_NAME" == "master" ] || [ "$BRANCH_NAME" == "develop" ] || [ "$BRANCH_NAME" == "test" ] || [[ "$BRANCH_NAME" = release* ]]; then
  # if "master" or "develop", then exit normally and don't modify the commit
  exit 0
else
  # otherwise, extract [PROJECT_NAME_IN_CAPS]-[TICKET_NUMBER] from the branch name
  BRANCH_NAME=$(echo $BRANCH_NAME | grep -oE "[A-Z]+-[0-9]+")

  # is the branch name in the source of the commit message?
  BRANCH_IN_COMMIT=$(grep -c "\[$BRANCH_NAME\]" $1)

  # is the branch name non-empty?
  # is this branch name in the source of the commit message?
  if [ -n "$BRANCH_NAME" ] && ! [[ $BRANCH_IN_COMMIT -ge 1 ]]; then
    sed -i.bak -e "1s/^/$BRANCH_NAME: /" $1
  else
    echo "error: your branch name must contain \"[PROJECT_NAME_IN_CAPS]-[TICKET_NUMBER]\""
    exit 1
  fi
fi