Git hook to check each commit starts with a JIRA issue key.

commit-msg

#!/bin/sh
#
# A hook script to check the commit log message.  Called by "git commit" with
# one argument, the name of the file that has the commit message.  The hook
# should exit with non-zero status after issuing an appropriate message if it
# wants to stop the commit.  The hook is allowed to edit the commit message
# file.
#

test "" = "$(cat $1 | head -n1 | egrep -v '^[A-Z]+-[0-9]+\b')" || {
  echo >&2 ''
  echo >&2 ''
  echo >&2 *** Missing JIRA issue key. ***
  echo >&2 ''
  echo >&2 ''
  # exit 1   # enable if you want to prevent the commit
}
exit 0