Git hook to prefix commit messages with Jira ticket ids (e.g. `SER-8736`). File must be within project's `/.git/hooks/`

commit-msg

#!/bin/sh
#
# Commit hook to add a JIRA ticket reference as a prefix to any commit messages.
# NOTE: JIRA ticket number MUST be included in branch name or it does nothing...
# Doesn't make any specific checks, just does it.

BRANCH_NAME=$(git branch | grep '*' | sed 's/* //')
REGEX_TICKET_ID='([A-Z]{3,4}-[0-9]{4})'

# Do the regex search
[[ $BRANCH_NAME =~ $REGEX_TICKET_ID ]]

# regex match
ticket_id=${BASH_REMATCH[1]}

# prefix the JIRA ticket id to commit message ($1)
echo "$ticket_id"': '$(cat "$1") > "$1"