YAML linter

yamllint.php

<?php
<<<CONFIG
packages:
    - "symfony/yaml: ~2.3"
CONFIG;

use Symfony\Component\Yaml\Exception\ParseException;
use Symfony\Component\Yaml\Parser;

$content = file_get_contents($argv[1]);

$parser = new Parser();
try {
    $parser->parse($content);
} catch (ParseException $e) {
    echo $e->getMessage();

    return 1;
}

return 0;