prepare-commit-msg

#!/usr/bin/env php
<?php

list(, $file, $source) = array_pad($argv, 3, '');

if ($source !== '' && $source !== 'message') {
    exit(0);
}

$branch = `git symbolic-ref --short HEAD`;

if (!preg_match('/^[bft]?(?<issue>\d+)/', $branch, $matches)) {
    exit(0);
}

$prefix = "[#{$matches['issue']}] ";

$pattern = '/^\[#\d+\] /';
$contents = file_get_contents($file);

if (!preg_match($pattern, $contents)) {
    file_put_contents($file, $prefix.$contents);
}