git hook for checking a commit message

commit-msg

#!/bin/sh
# move to /.git/hooks/commit-msg
#
# check for regex pattern

PATTERN="[A-Z]{2,}_[0-9]{1,6}"

head -n1 "$1" |grep -qsE ${PATTERN} || {
  echo >&2 Include pattern in your commit message. Example: ABCD_1234.
  exit 1
}