Upgrading Adminimal Theme to Drupal 11 Unstable Release

If you're a fan of the sleek and modern Adminimal Theme for Drupal administration, you may have noticed it doesn't have a stable release for Drupal 11 yet. However, there is an unstable development branch that works with Drupal 11. Here's how you can upgrade to it.

Step 1: Update composer.json repositories

In your Drupal project's composer.json file, add the following to the "repositories" section:

    "repositories": {
        "drupal": {
            "type": "composer",
            "url": "https://packages.drupal.org/8",
            "exclude": [
                "drupal/adminimal_theme"
            ]
        },
        "drupal/adminimal_theme": {
            "type": "vcs",
            "url": "https://git.drupalcode.org/issue/adminimal_theme-3460890.git"
        }
    }

This tells Composer to fetch adminimal_theme from the specific development branch instead of the main Drupal packages repository.

Step 2: Require the dev versions

Next, in the "require" section of composer.json, specify the following versions:

    "drupal/adminimal_admin_toolbar": "2.0.x-dev@dev",
    "drupal/adminimal_theme": "dev-3460890-d11_ready",

This pulls in the development version of adminimal_theme that is compatible with Drupal 11, as well as the corresponding dev release of the adminimal_admin_toolbar companion module.

Step 3: Update dependencies

Now from your terminal, run:

   $ composer update drupal/adminimal_theme drupal/adminimal_admin_toolbar

This will fetch the specified development versions of the theme and toolbar.

After the update completes, you should have a working adminimal_theme setup on Drupal 11! Keep in mind this is unstable, development code, so test thoroughly and don't use on production sites.