Install via composer

I've done some work in an attempt to make installation of plupload module, plupload library and the examples clearing patch a bit quicker in composer-based workflows.

Would be great to get some feedback before committing this.

The proposed solution is based on adding a composer.libraries.json file to the module and use wikimedia/composer-merge-plugin and cweagans/composer-patches in main composer.json so all gets installed correctly.

So the instructions to test this would be the following. Step 1 won't be necessary once this is merged.

1. Instruct composer to use this issue's branch instead of default - The repositories section of your composer.json should end up with something like this:

    "repositories": [
        {
            "type": "composer",
            "url": "https://packages.drupal.org/8",
            "exclude": [
                "drupal/plupload"
            ]
        },
        {
            "type": "package",
            "package": {
                "name": "drupal/plupload",
                "version": "dev-2902645-install-via-composer",
                "type": "drupal-module",
                "source": {
                    "type": "git",
                    "url": "https://git.drupalcode.org/issue/plupload-2902645",
                    "reference": "2.1.x"
                }
            }
        }
    ],

2. Install cweagans/composer-patches and wikimedia/composer-merge-plugin

composer require cweagans/composer-patches wikimedia/composer-merge-plugin

3. Instruct merge plugin to use plupload composer.json. The "extra" section of composer.json should be like this:

    "extra": {
        "merge-plugin": {
            "include": [
                "web/modules/contrib/plupload/composer.libraries.json"
            ]
        }
    }

Created documentation on how to install plupload library via composer:

https://www.drupal.org/docs/extending-drupal/contributed-modules/contrib... →

Updated readme with a reference to it.

Automatically closed - issue fixed for 2 weeks with no activity.