Working on a Drupal module using composer
So I needed the latest git checkout of the source code from external entities Drupal module. Its latest is 8.x-2.x
composer require drupal/external_entities is not enough as that will download the latest released version in this case 8.x-2.0-alpha1
composer require drupal/external_entities:8.x-2.x is not a valid version for composer as Drupal versions are not semantic versioned.
We should use as version 2.x which is a Drupal 8 compatible branch . SemVer can work with dev versions using
2.x-dev so using
composer require drupal/external_entities:2.x-dev we get the latest dev. But still as zip
composer.json setting a preferred-install for the module we finally get the latest git checkout.
composer require drupal/external_entities:2.x-dev we get a git checkout but it is a detached head.
HEAD detached at 809e275
nothing to commit, working tree clean
The final step is to do
git checkout origin and you can create patches.