Installing a downloaded extension with a composer

Question

I am new to M2 and don't exactly know much about composer.

I am able to install extensions from GitHub or Magento store with composer just fine.

But I don't know what to do with extensions where "component name" is not provided. I want to be able to later easily update it like you can with composer.

So how do I install a downloaded extension via composer?

Answer 1

If You need extensions name, just open registration.php file directly in extension folder. There should be something like:

<?php
/**
 * Copyright © 2013-2017 Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'Magento_Captcha',
    __DIR__
);

Magento_Captcha is extension name.

If you want enable new extension installed via composer run:
composer update composer install (depends)
php bin/magento module:enable Magento_Captcha
php bin/magento setup:upgrade
php bin/magento setup:di:compile

EDIT: To add new repo to composer use:
composer require username/project
For example https://github.com/weprovide/magento2-module-disablevisitorlog
compsoer require weprovide/magento2-module-disablevisitorlog