Airship\Engine\Continuum\Installers\Gadget::install PHP Method

    public function install(InstallFile $fileInfo) : bool
    {
        $supplier = $this->supplier->getName();
        $fileName = $supplier . '.' . $this->package . '.phar';
        $metadata = $this->getMetadata($fileInfo);
        // Move .phar file to its destination.
        if (!empty($metadata['cabin'])) {
            $gadgetConfigFile = ROOT . '/Cabin/' . $metadata['cabin'] . '/config/gadgets.json';
            // Cabin-specific gadget
            $cabin = ROOT . '/Cabin/' . $metadata['cabin'] . '/Gadgets';
            if (!\is_dir($cabin)) {
                $this->log('Could not install; cabin "' . $metadata['cabin'] . '" is not installed.', LogLevel::ERROR);
                return false;
            }
            $filePath = $cabin . '/' . $supplier . '/' . $fileName;
            if (!\is_dir($cabin . '/' . $supplier)) {
                \mkdir($cabin . '/' . $supplier, 0775);
            }
        } else {
            $gadgetConfigFile = ROOT . '/config/gadgets.json';
            // Universal gadget. (Probably affects the Engine.)
            $filePath = ROOT . '/Gadgets/' . $supplier . '/' . $fileName;
            if (!\is_dir(ROOT . '/Gadgets/' . $supplier)) {
                \mkdir(ROOT . '/Gadgets/' . $supplier, 0775);
            }
        }
        $gadgetConfig = \Airship\loadJSON($gadgetConfigFile);
        $gadgetConfig[] = [['supplier' => $supplier, 'name' => $this->package, 'version' => $metadata['version'] ?? null, 'path' => $filePath, 'enabled' => true]];
        \Airship\saveJSON($gadgetConfigFile, $gadgetConfig);
        \rename($fileInfo->getPath(), $filePath);
        // If cabin-specific, add to the cabin's gadget.json
        if ($metadata['cabin']) {
            $this->addToCabin($metadata['cabin']);
        }
        // Run the update hooks:
        $alias = 'gadget.' . $fileName;
        $phar = new \Phar($filePath, \FilesystemIterator::CURRENT_AS_FILEINFO | \FilesystemIterator::KEY_AS_FILENAME);
        $phar->setAlias($alias);
        // Run the update trigger.
        if (\file_exists('phar://' . $alias . '/update_trigger.php')) {
            Sandbox::safeRequire('phar://' . $alias . '/update_trigger.php');
        }
        self::$continuumLogger->store(LogLevel::INFO, 'Install successful', $this->getLogContext($fileInfo));
        // Finally, clear the cache files:
        return $this->clearCache();
    }