How to add in my plugin a third vendor Git project with composer.json

Question

I need to use this Git project in my plugin.

First I drop source code in a folder, and load it with

require_once dirname(__FILE__) . '/vendor/Frozensheep/RightmoveADF/RightmoveADF.php';

But there is a problem, because although apparently one Class (for instance GetBranchPropertyList) is loaded by the namespace use:

    //
    use Frozensheep\RightmoveADF\Request\GetBranchPropertyList;
    //

I get an error when invoke the class:

   //
   return new GetBranchPropertyList();
   //

Fatal error: Uncaught Error: Class 'Frozensheep\RightmoveADF\Request\GetBranchPropertyList' not found

The project includes a composer.json, which I think is what I need to install and configure, but I have no idea how to use it.

Can someone explain me step by step how to proceed with composer.json config?

Answer 1

Composer generates the autoloader for you. Thus, you don't need to require a specific file from vendor packages. All you need to do is require the composer autoloader:

Change require_once dirname(__FILE__) . '/vendor/Frozensheep/RightmoveADF/RightmoveADF.php'; to require_once plugin_dir_path(__FILE__) . 'vendor/autoload.php';

In some cases, classes still not be found. Re-generate the composer autoloader by $ composer dump-autoload.

Usually, you should not mess with the vendor directory. If you did, I suggest you remove the vendor directory and re-install packages by $ rm -dr vendor/ and $ composer install