composer/bin/composer

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

if (PHP_SAPI !== 'cli') {
    echo 'Warning: Composer should be invoked via the CLI version of PHP, not the '.PHP_SAPI.' SAPI'.PHP_EOL;
}

setlocale(LC_ALL, 'C');
require __DIR__.'/../src/bootstrap.php';

use Composer\Factory;
use Composer\XdebugHandler;
use Composer\Console\Application;

error_reporting(-1);

// Create output for XdebugHandler and Application
$output = Factory::createOutput();

$xdebug = new XdebugHandler($output);
$xdebug->check();
unset($xdebug);

if (function_exists('ini_set')) {
    @ini_set('display_errors', 1);

    $memoryInBytes = function ($value) {
        $unit = strtolower(substr($value, -1, 1));
        $value = (int) $value;
        switch($unit) {
            case 'g':
                $value *= 1024;
                // no break (cumulative multiplier)
            case 'm':
                $value *= 1024;
                // no break (cumulative multiplier)
            case 'k':
                $value *= 1024;
        }

        return $value;
    };

    $memoryLimit = trim(ini_get('memory_limit'));
    // Increase memory_limit if it is lower than 1.5GB
    if ($memoryLimit != -1 && $memoryInBytes($memoryLimit) < 1024 * 1024 * 1536) {
        @ini_set('memory_limit', '1536M');
    }
    // Set user defined memory limit
    if ($memoryLimit = getenv('COMPOSER_MEMORY_LIMIT')) {
        @ini_set('memory_limit', $memoryLimit);
    }
    unset($memoryInBytes, $memoryLimit);
}

putenv('COMPOSER_BINARY='.realpath($_SERVER['argv'][0]));

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