Florian Weber

@greg-1-anderson Please review. Thanks!

This should not happen we use ``"minimum-stability": "dev"`` **and** ``"prefer-stable": true`` for this reason. Are you sure you have both in your composer.json?

I have the following alias in my ``.gitconfig``. I use it from time to time to roll a quick core patch. It works as long the files are in the...

Fetch git repo with composer: ```composer require --prefer-source drupal/core:8.5.x-dev```

The subtree split is fairly up to date. You can run a git pull in the core folder after the initial install. It should work as long core did not...

Could you provide some information about the environment you are using?

Not sure if "." is even possible with composer create-project. You are using composer 1.3.2, maybe you could try it again the latest release (1.4.x).

The plugin is not needed with Composer 2.

@yched https://github.com/wikimedia/composer-merge-plugin could work as well right?

Looks like we are going to use the composer-merge plugin to deal with /composer.json and /core/composer.json in Drupal core. https://www.drupal.org/node/2380389#comment-10349507 contains the patch