Prepare Commit Message Hook Script

prepare-commit-msg

#!/usr/bin/php
<?php

# Git Prepare Commit Message Hook Script
#
# Location: <repository>/.git/hooks/prepare-commit-msg
#
# This script will automatically add the correct
# Pivotal Ticket ID to the beginning of each commit message
# When the branch ID is starts with the Pivotal Message ID.
# It can be overridden if specified in the message.
#
# Example:
#
# 1234567_branch_name => '[#1234567] commit message'
#
# @author Tamas Kalman <ktamas77@gmail.com>

$messageFile = $argv[1];
$message = file_get_contents($messageFile);

$messagePivotalPattern = '/^\[#([0-9]{1,16})\]/';
preg_match($messagePivotalPattern, $message, $matches);
$messagePivotalId = (isset($matches[1])) ? $matches[1] : null;
if ($messagePivotalId === null) {
    $currentBranchName = exec('git rev-parse --abbrev-ref HEAD');
    $branchPivotalPattern = '/^([0-9]{1,16})_/';
    preg_match($branchPivotalPattern, $currentBranchName, $matches);
    $branchPivotalId = (isset($matches[1])) ? $matches[1] : null;
    if ($branchPivotalId !== null) {
        $message = sprintf('[#%s] %s', $branchPivotalId, $message);
        file_put_contents($messageFile, $message);
    }
}