composer/bin/composer

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

require __DIR__.'/../src/bootstrap.php';

use Composer\Console\Application;

error_reporting(-1);
@ini_set('display_errors', 1);

$memoryInBytes = function ($value) {
    //$memoryLimit = ini_get('memory_limit');

    $unit = strtolower(substr($value, -1, 1));
    $value = (int) $value;
    switch($unit) {
        case 'g':
            $value *= 1024;
        case 'm':
            $value *= 1024;
        case 'k':
            $value *= 1024;
    }

    return $value;
};

$memoryLimit = trim(ini_get('memory_limit'));
// Increase memory_limit if it is lower than 256M
if ($memoryLimit != -1 && $memoryInBytes($memoryLimit) < 256 * 1024 * 1024) {
    @ini_set('memory_limit', '256M');
    printf('Warning: memory_limit was increased from %s to %s' . PHP_EOL . PHP_EOL, $memoryLimit, '256M');
}
unset($memoryInBytes);

// run the command application
$application = new Application();
$application->run();