Composer/Packagist Proxy

packagist_proxy.php

<?php

$baseUrl = "http://localhost/packagist";
$baseDir = "/var/www/packagist";

if (!file_exists($baseDir)) {
    echo "Base dir $baseDir for local packagist proxy does not exist\n";
    exit(1);
}
$packagesJson = $baseDir . "/packages.json";

$packagistJson = json_decode(file_get_contents("http://www.packagist.org/packages.json"), true);
if (file_exists($packagesJson)) {
    $localJson = json_decode(file_get_contents($packagesJson), true);
} else {
    $localJson = array();
}

$packageCount = count($packagistJson);
$i = 0;
foreach ($packagistJson as $name => $package) {
    $i++;
    $localPackage = $package;
    $localPackage['versions'] = array();

    foreach ($package['versions'] as $version => $data) {        
        if (isset($localJson[$name]['versions'][$version]) &&
            $localJson[$name]['versions'][$version]['dist']['reference'] == $data['dist']['reference']) {
            continue;
        }
        
        if ($data['dist']['type'] != 'zip') {
            continue;
        }
        
        $url = $data['dist']['url'];
        $relativeFile = '/' . $name . '/' . $version . '.zip';
        $path = $baseDir . $relativeFile;
        echo "Downloading $name @ $version";
        downloadInto($path, $url);
        echo ". [$i/$packageCount]\n";
        
        if (!isset($localJson[$name])) {
            $localJson[$name] = $localPackage;
        }
        $data['dist']['url'] = $baseUrl . $relativeFile;
        $localJson[$name] = $data;
    }
    file_put_contents($packagesJson, json_encode($localJson));
}

function downloadInto($path, $url)
{
    if (!file_exists(dirname($path))) {
        mkdir(dirname($path), 0777, true);
    }
 
    $fp = fopen($path, 'w');
 
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_FILE, $fp);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
 
    $data = curl_exec($ch);
 
    curl_close($ch);
    fclose($fp);
}