Commit msg hook in PHP that follow https://cbea.ms/git-commit

commit-msg

#!/usr/bin/php
<?php

$message = file_get_contents($argv[1]);
checkMessage($message);
exit(0);

function checkMessage($message) {

  if (strlen($message) < 10) {
      echo "A commit must be annotated by a prefixed message of at least ten characters\n";
      exit(1);

  }
  foreach (preg_split('/\v/', $message, -1) as $key => $line) {
    switch($key) {
      case 0:
        // Check the Subject line.

        if (strlen($line) > 50) {
          echo "Limit the commit subject line to 50 characters\n";
          exit(1);
        }

        if (!ctype_upper($line[0])) {
          echo "Capitalize the commit subject line\n";
          exit(1);
        }

        if (substr($line, -1) == '.') {
          echo "Do not end the commit subject line with a period\n";
          exit(1);
        }
        break;

      case 1:
        if (strlen($line) > 0) {
          echo "Separate commit subject from body with a blank line\n";
          exit(1);
        }
        break;

      default:
        // If line is a comment ignore it.
        if ($line[0] == '#') {
          continue 2;
        }

        if (strlen($line) > 72) {
          echo "Wrap the commit body at 72 characters\n";
          exit(1);
        }
    }
  }
}