add jira ticket prefix to commit message

prepare-commit-msg

#!/bin/sh

COMMIT_MSG_FILE=$1
COMMIT_SOURCE=$2
CURR_MESSAGE=$(cat $COMMIT_MSG_FILE)

# if current commit message starts with a "["
if [ $(echo $CURR_MESSAGE | cut -c1) = "[" ]; then
  exit 0
fi

# if commit is coming from anything other than a simple commit, exit (eg. merge, revert, amend, etc.)
if [ "$COMMIT_SOURCE" != "message" -a ! -z "$COMMIT_SOURCE" ]; then
  exit 0
fi

# extract ticket number from branch name and add it to commit message
TICKET=$(git rev-parse --abbrev-ref HEAD | grep -Eo "/\w+-[0-9]+" | head -n1 | cut -c2- | tr a-z A-Z)
if [ -z $TICKET ];then
  exit 0;
fi

echo "[$TICKET] $CURR_MESSAGE" > $COMMIT_MSG_FILE