Git update hook forcing the existence of Jira ticket id at the beginning of the subject (first line in commit message)

update

#!/bin/bash

refname="$1"
oldrev="$2"
newrev="$3"
result=0

# Make sure we handle the situation when the branch does not exist yet
if ! [ $oldrev = 0000000000000000000000000000000000000000 ] ; then
    excludes=( ^$oldrev )
else
    excludes=( $(git for-each-ref --format '^%(refname:short)' refs/heads/) )
fi

# Get the list of incomming commits
commits=`git rev-list $newrev "${excludes[@]}"`

# For every commit in the list
for commit in $commits
do
  # check the log message for ticket number
  message=`git log --format=%s -1 $commit`
  ticket=`echo "$message" | grep -o "^[A-Z]\{2,3\}-[0-9]\+"`
  if [ "$ticket" = "" ] ; then
    echo "Commit $commit does not start with a ticket number"
    result=1
  fi
done

exit $result