Re: [GSoC][PATCH 2/3] credential-cache.c: Make git use XDG_CACHE_HOME for credentials

[Jeff King <peff@peff.net>]

On Mon, Mar 13, 2017 at 11:09:11AM -0700, Junio C Hamano wrote:

> > +	if (home_socket)
> > +		if (file_exists(home_socket))
> > +			return home_socket;
> > +		else
> > +			free(home_socket);
> > +
> > +	return xdg_cache_home("credential/socket");
> > +}
> 
> I somehow feel that the order of precedence should be the other way
> around, though.  
> 
> If somebody really wants to use the xdg location and has a socket
> already there, using that existing socket would be the right thing
> to do.  However, when neither ~/.git-credential-cache/socket nor
> ~/.cache/git/socket exists, why should we prefer the latter over the
> former?

How would they get a socket in the xdg location if we never create one?

I think the point of this commit is that we should generally prefer the
xdg locations to ones that were simply made up by Git.

As an aside, I also wondered if stale socket files might cause us to
keep picking the "old" location forever. But it looks like
credential-cache--daemon does use a tempfile handler to make sure it
cleans up the socket afterwards (and we are checking for the actual
socket, not just the presence of the outer directory, which is good).

-Peff