I've two or more projects (let's call them ProjectFoo and ProjectBar) having some common code that I put in a submodule.
My understanding is that if I commit changes to a submodule from within ProjectFoo it'll be in a detached head that only all ProjectFoo clones can see:
(master) $ cd ProjectFooBarCommoneSubmodule/
(master) $ git commit -am "Common code fix."
(56f21fb0...) $ git push
Everything up-to-date
That's probably because the master branch hasn't changed. I could probably do something like git checkout master && git merge Everything up-to-date but that seem pretty ugly. May be a git reset --hard master would do the same but it seems even uglier.
How to have a common code shared by project, updated from within those projects using it? In other words, committing to that submodule should update all various repositories (repositories, not just clones) that use this same submodule.
---- EDIT ----
Visibly my checked-out repository was messed up and broken. It should have worked right from the start like that (on ProjectFoo in this example):
(master) $ cd ProjectFooBarCommoneSubmodule/
(master) $ git commit -am "Common code fix."
(master) $ git push
....
fbfdd71..0acce63 master -> master
(master) $ cd ..
(master) $ git add ProjectFooBarCommoneSubmodule
(master) $ git commit -m "Submodule update."
Then to get that change from on other projects, like ProjectBar:
(master) $ cd ProjectFooBarCommoneSubmodule/
(master) $ git pull
Would update to the latest common code. A git checkout master may be required if it's on a detached head.