generate composer.json from modman

composer_json_generator.php

<?php
$folderToScan = '.modman/3rdParty';
$directories = scandir($folderToScan);

foreach ($directories as $directory) {
    if ($directory === '.' || $directory === '..' || $directory === '3rdParty') {
        continue;
    }
    if (!file_exists($folderToScan . '/' . $directory . '/modman')
        || file_exists($folderToScan . '/' . $directory . '/composer.json')
    ) {
        continue;
    }

    $fn = fopen($folderToScan . '/' . $directory . '/modman', "r");
    $composerJson = [
        "name" => strtolower($directory),
        "type" => "magento-module",
        "version" => "1.0.0",
        "extra" => [
            "map" => [

            ],
        ],
    ];

    $mapping = [];
    while (!feof($fn)) {
        $line = trim(fgets($fn));
        if ($line) {
            $matches = [];
            preg_match('/(.*)[ \t]+(.*)/', $line, $matches);
            $mapping[] = $matches;
            $composerJson['extra']['map'][] = [trim($matches[1]), trim($matches[2])];
        }
    }


    fclose($fn);
    $content = json_encode($composerJson, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
    file_put_contents($folderToScan . '/' . $directory . '/composer.json', $content);
}