commit-msg: Prepend Jira ID to a commit in a git hook that Pycharm will execute

commit-msg

#!/bin/sh
#
# Automatically prepends branch name to every commit message
#   if the branch name has a prefix with a Jira ticket id, i.e. FOO-123/my-branch.
#

# Get and clean up the present branch name, then grep it for a format similar to Jira ticket IDs
NAME=$(git branch | grep '\* ' | sed 's/* \((no branch, rebasing \)\{0,1\}//' | sed 's/\/.*//' \
  | tr "[:lower:]" "[:upper:]" \
  | grep -E "[A-Z]{2,10}-\d{1,6}")

# assert name exists & branch name is not already present in the commit, i.e. when rewording/amending
if [ -n "$NAME" ] && [ "" == "$(grep '^'"$NAME"':' $1)" ]
then
  echo "branch not in commit msg"
  echo "$NAME"': '"$(cat "$1")" > "$1"
fi