How do I include composer.libraries.json in root composer.json without using the wikimedia/composer-merge-plugin plugin?

Question

In the recent update to Composer 2.0 the advice is to get rid of the wikimedia/composer-merge-plugin, which was even removed from the dependencies of Drupal core.

There is documentation on how to include custom module's composer.json in the root composer.json, for example Managing dependencies for a custom project, but I cannot find documentation on how to include composer.libraries.json in the root composer.json.

Can anyone explain how to get the Webform module compatible with Composer 2.0?

Answer 1

here is a specific way how to do it for webform module.

1. run composer require wikimedia/composer-merge-plugin
2. in composer add

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

3. run composer update --lock and verify the files

Reference https://www.drupal.org/docs/8/modules/webform/webform-frequently-asked-questions/how-to-use-composer-to-install-libraries

Reference 2 https://www.drupal.org/docs/8/modules/webform/webform-cookbook/using-the-composer-merge-plugin-to-download-libraries-with

Github issue https://github.com/wikimedia/composer-merge-plugin/issues/184

Answer 2

The alternate ways are documented. I think the one you would prefer is:

Execute drush webform:composer:update, to update your Drupal installation's composer.json to include the Webform module's selected libraries as repositories.