When installing without lockfile, Composer now behaves as upgrade. It also executes the pre-upgrade-cmd instead of pre-install-cmd. Behaviour with composer.lock available is not changed.
With the latest composer version, doing a fresh install will fail because the vendor files are not yet present.
Can't rely on being able to run php artisan, before updating. composer/composer#5066
When installing without lockfile, Composer now behaves as upgrade. It also executes the
pre-upgrade-cmdinstead ofpre-install-cmd. Behaviour with composer.lock available is not changed.With the latest composer version, doing a fresh install will fail because the vendor files are not yet present.