Managing dependencies for a custom project is not hosted on Packagist or Drupal.org

Since starting from Drupal v8.8.0 has removed the Wikimedia merge plugin and replaced it with a Composer 'path' repository, a native Composer feature which serves the same needs as the merge plugin with fewer disadvantages, in this short article, I want to show how to manage dependencies for a custom project.

Create composer.json file with a similar code:

{
    "name": "mypackage/custom_module",
    "description": "The description of my module.",
    "type": "drupal-custom-module",
    "homepage": "https://makedrupaleasy.com",
    "authors": [
        {
            "name": "Ruslan P",
            "homepage": "https://www.drupal.org/u/ruslanp",
            "role": "Maintainer"
        },
    ],
    "minimum-stability": "dev",
    "prefer-stable": true,
    "config": {
        "preferred-install": "dist"
    },
    "require": {
        "symfony/dom-crawler": "^4.0",
        "symfony/css-selector": "^4.0"
    }
}

Find the repositories section of your root composer.json file, and modify it to include your custom module or modules as path repositories:

"repositories": [
    {
        "type": "composer",
        "url": "https://packages.drupal.org/8"
    },
    {
        "type": "path",
        "url": "docroot/modules/custom/custom_module"
    }
]

Next, require your module in your project: composer require mypackage/custom_module

Done!

Related links:

• Stop using wikimedia/composer-merge-plugin
• Add a composer.json file
• Managing dependencies for a custom project