I have a question regarding /vendor (#Fetch_external_libraries)
I am downloading with
git clone https://gerrit.wikimedia.org/r/mediawiki/core.git --depth=1 --branch 1.35.1 mediawiki
git submodule update --init --recursive
When I look under /vendor, I can see that it is not empty. Is it possible that in my case it is not necessary to use composer or download from git once more?
From what I understand I only need composer for additional extensions?