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Re: project.el: git submodules?

From: Stefan Monnier
Subject: Re: project.el: git submodules?
Date: Tue, 12 May 2020 17:04:31 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)

> Perhaps you could suggest an additional test to determine whether
> a directory is a submodule, then?

Indeed, technically, a submodule is implemented in the same way as a worktree.
And in `elpa.git`, we use worktrees to implement our own notion
of submodule.

I get the impression that distinguishing the two amounts to guessing the
intent behind a particular directory layout, so there will never be
a 100% correct answer.

But I guess a first approximation is to check "is there another .git
somewhere further up the directory tree and if so, does it use
the same repository as the current .git does?".


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