Drupal git commit hook

pre-commit

#!/usr/bin/php
<?php
/**
 * @file
 * This is a Git pre-commit hook that informs you when you are
 * about to commit whitespace or a debug function.
 */

$red = "\033[1;31m";
$red_end = "\033[0m";

$yellow = "\033[1;33m";
$yellow_end = "\033[0m";

/**
 * An array of functions to check for.
 */
$check = array();
$check[] = ' dsm(';
$check[] = ' dpm(';
$check[] = ' dpr(';
$check[] = ' dprint_r(';
$check[] = ' db_queryd(';
$check[] = ' krumo';
$check[] = ' kpr(';
$check[] = ' kprint_r(';
$check[] = ' var_dump(';
$check[] = ' dd(';
$check[] = ' drupal_debug(';
$check[] = ' dpq(';

$return = 0;
$diff = array();
exec('git diff --staged', $diff, $return);

if ($return !== 0) {
  fwrite(STDOUT, "git diff returned an error. Commit aborted.\n");
  exit(1);
}

foreach ($diff as $lineno => $line) {
  if (substr($line, 0, 1) != '+') {
    // Skip the line if you aren't adding something that may contain a debug
    // function call.
    continue;
  }
  foreach ($check as $lineno => $function) {
    if (strstr($line, $function)) {
      fwrite(STDOUT, "{$red}Oh, noes! You were about to commit a $function)?{$red_end}\n");
      fwrite(STDOUT, $yellow . $line . $yellow_end);
      fwrite(STDOUT, "\nCommit aborted.\n");
      exit(3);
    }
  }
}

$whitespace = shell_exec('git diff --staged --check');
if (!empty($whitespace)) {
  fwrite(STDOUT, "{$red}Commit aborted. Fix trailing whitespace.{$red_end}\n");
  fwrite(STDOUT, $yellow . $whitespace . $yellow_end);
  exit(4);
}

// If this is still running, all is peachy. Let the developer commit.
exit(0);