Compiles classes into a single giant package file

compiler.php

<?php

/**
 * Compiles all files into one giant package file
 *
 * Usage php compiler.php path/directory/PackageFoo
 *
 * We assume that your package is under a package folder. This will be used as the package file name
 * e.g. path/directory/PackageFoo/
 *
 * Other things to note:
 * - All namespaces are commented out
 * - All use statements are commented out
 */

function rglob($directory) {
    $files = glob($directory . '/*');

    $result = [];
    if (!$files) return $result;

    foreach ($files as $file) {
        if (is_dir($file)) {
            $subfiles = rglob($file);
            $result = array_merge($result, $subfiles);
            continue;
        }

        $result[] = $file;
    }


    return $result;
}

function getContents($directory) {
    $files = rglob($directory);
    $contents = [];
    $spaces = [];
    $uses = [];

    foreach ($files as $file) {
        if (preg_match("#\.package.php$#", $file) != false) continue;
        if (preg_match("#\.php$#", $file) == false) continue;

        if ($content = file_get_contents($file)) {
            $content = preg_replace("#^\<\?php#", "", $content);

            if (preg_match_all("#use (.+);#i", (string) $content, $match)) {
                $content = preg_replace("#use (.+);\n#i", "", (string) $content);
                $uses = array_merge($uses, $match[0]);
            }

            if (preg_match_all("#namespace (.+);#i", (string) $content, $match)) {
                $content = preg_replace("#namespace (.+);\n\n#i", "", (string) $content);
                $spaces = array_merge($spaces, $match[0]);
            }

            $content = trim((string) $content);
            $content = "// $file\n$content";
            $contents[$file] = $content;
        }
    }

    $uses = array_unique($uses);
    sort($uses);
    $uses = array_map(function($v) {
        return "// $v";
    }, $uses);

    $spaces = array_unique($spaces);
    sort($spaces);
    $spaces = array_map(function($v) {
        return "// $v";
    }, $spaces);

    return ['contents' => $contents, 'namespaces' => $spaces, 'uses' => $uses];
}

function getPackageMeta($directory) {
    $directory = trim($directory, '/\\');
    $directory = (string) preg_replace("#[/\\\\]#", DIRECTORY_SEPARATOR, $directory);

    $dirs = explode(DIRECTORY_SEPARATOR, $directory);
    $packageName = array_pop($dirs);

    return ['directory' => $directory, 'package_name' => $packageName, 'namespace' => $packageName];
}

function createPackageFile($package, $contents) {
    $headers = [];
    $headers[] = "namespace {$package['namespace']};";
    $headers[] = implode("\n", $contents['namespaces']);
    $headers[] = implode("\n", $contents['uses']);
    $header = implode("\n\n", $headers);

    $contents = implode("\n", $contents['contents']);
    $contents = "<?php\n\n$header\n\n$contents";
    $file = $package['directory'] . DIRECTORY_SEPARATOR . $package['package_name'] . ".package.php";

    file_put_contents($file, $contents);
}

$directory = isset($argv[1]) ? $argv[1] : __DIR__;
$package = getPackageMeta($directory);
$contents = getContents($package['directory']);
createPackageFile($package, $contents);