Git commit message hook

commit-msg

#!/bin/sh
#
# This hook rejects commit messages that do not have an issue tag.
#

COMMIT_MSG=`cat $1`
COMMIT_PREFIX="\[[A-Z]+-[0-9]+\][[:blank:]][A-Z]"

# The normal way to match regular expression doesn't work on msysGit?
# if [[ $COMMIT_MSG =~ $COMMIT_PREFIX ]]; then

if !(echo $COMMIT_MSG | grep -E $COMMIT_PREFIX > /dev/null); then
    echo
    echo "Commit message must contain an issue tag. To bypass, run with --no-verify."
    echo
    echo "Accepts:"
    echo "  [ABC-123] This is a commit message"
    echo
    echo "Rejects:"
    echo "  This is a commit message"
    echo "  [ABC-123]This is a commit message"
    echo "  [ABC-123] this is a commit message"
    echo
    exit 1
fi