Re: Fetch and refs/remotes/<refname>/HEAD

From: Jeff King <peff@peff.net>
Date: Aug 9, 2015, 23:23 UTC
Message-ID: <20150809232330.GA25769@sigill.intra.peff.net>
In-Reply-To: <loom.20150803T151815-131@post.gmane.org>

On Mon, Aug 03, 2015 at 01:28:05PM +0000, Dror Livne wrote:

Show 9 quoted lines

> I have noticed that when cloning a repository, I get a
> refs/remotes/origin/HEAD symbolic ref.
> 
> On the other hand, when fetching a new remote, the remote HEAD is not set by
> git-fetch (but can be added later by `git remote set-head ...')
> 
> I was under the impression that clone is equivalent to (at least) init+fetch.
> 
> Is there a rationale for that difference in behavior?

I have been annoyed by this in the past, too. There's no real reason, except that setting up the symref is outside the scope of "fetch". Fetching is just about updating refs, and we explicitly do not want subsequent fetches to overwrite any changes you might make to refs/remotes/.../HEAD.

Setting up the remote HEAD symref more rightly belongs to "git remote add", but that program does not otherwise talk to the remote. And that's why we end up with the separate set-head step. It might make sense for "git remote add -f" to automatically run "set-head", since it is contacting the remote server already. And then:

  git init
  git remote add -f origin ...

would be similar to "git clone".

-Peff