git commit message helper

featcommit

#! /usr/bin/env php
<?php
// filename: featcommit

/**
 *
 * This scripts prepends task number to the commit message if current git branch is
 * "FOO-xxxx".
 * So it helps you by inserting your feature number into the commit message.
 * Use it as `featcommit.php "commit message"`.
 */

function getAsteriskLine($command) {
  $output = array();
  $status = 0;
  exec($command, $output, $status);
  if ($status > 0)
    throw new Exception('Command `'.$command.'` returned status '.$status, 1);
  foreach ($output as $line) {
    if (preg_match('/^\*/', $line)) {
      return $line;
    }
  }

  throw new Exception('Cannot find line starting with * in the output of '.$command);
}

function getFeatureNumber() {
  $line = getAsteriskLine('git branch');

  $matches = array();
  if (!preg_match('/^\*\s(\w+-\d+).+$/', $line, $matches))
    throw new Exception("Can't find the feature number", 1);

  return $matches[1];
}

if ($argc < 2) {
  echo(sprintf("Usage: %s \"commit message\"\n", $argv[0]));
  exit(1);
}

$featureNumber = getFeatureNumber();

$commitCommand = sprintf("git commit -m \"%s: %s\"", $featureNumber, $argv[1]);

echo "Executing `$commitCommand`\n";
passthru($commitCommand);