Git prepare-commit-msg hook to append an issue tracker URL to commit messages (PHP).

git-hook_prepare-commit-msg.php

#!/C/xampp/php/php
<?php
#!/usr/bin/env php
/**
 * Git prepare-commit-msg hook to append an issue tracker URL to commit messages.
 *
 *   Git hooks on Windows: Ensure that the path to PHP is added to the %PATH% variable, and run `git commit` via the Bash shell.
 *
 *   Usage:  `git commit -em "Bug #123" <FILE>`
 *
 * @copyright 2013-01-23 N.D.Freear.
 * @license MIT
 * @link http://progit.org/book/ch7-3.html
 * @link https://github.com/github/github-services/blob/master/services/bugzilla.rb
 */
define('BUG_REGEX', '/^[\n]*(Ticket|Bug|Issue|Closes|Fixes| ?#){1,2} ?(\d+)[^\n]*/i');
define('BUG_URL', "http://iet-it-bugs.open.ac.uk/node/\\2\n#* https://iet.teamworkpm.net/tasks/\\2");
define('BUG_MSG_PREFIX', "#\\0\n\n#* ");


$commit_editmsg_file = $argv[1];



$template = @file_get_contents($commit_editmsg_file);
if (! $template) {
    _hook_status(1, 'Read error, empty `.git/COMMIT_EDITMSG` template');
}
if (preg_match('/^(\.|-a|--all|-.+)/', $template, $matches_a)) {
    _hook_status(1, "Error, unexpected `$matches_a[1]` in `.git/COMMIT_EDITMSG` template");
}

if (! isset($argv[2]) || 'message' !== $argv[2]) {
    _hook_status(1, 'Expecting `git commit -em "Bug #123" <FILE>` or `git cm "Bug #123 <FILE>`');
}

if (! preg_match(BUG_REGEX, $template, $matches)) {
    _hook_status(1, 'Expecting `git commit -em "Bug #123" <FILE>` or `git cm "Bug #123 <FILE>`');
}

$new_template = preg_replace(BUG_REGEX, BUG_MSG_PREFIX . BUG_URL, $template);

$bytes = @file_put_contents($commit_editmsg_file, $new_template);
if (! $bytes) {
    _hook_status(1, 'Write error, `.git/COMMIT_EDITMSG` template');
}

_hook_status(0);




function _hook_status($exit = 1, $message = NULL) {
  switch ($exit) {
    case 0:
      // Success.. exit
      echo '> Hook OK: prepare-commit-msg' .PHP_EOL;
      exit (0);
    case -1:
      // Intermediate status message
      echo '> Hook OK: '. $message .PHP_EOL;
      break;
    case 1:
    default:
      // ERROR.. abort
      echo '> Hook aborting commit: prepare-commit-msg.'. PHP_EOL .'> '. $message .PHP_EOL;
	  exit($exit);
  }
}