Re: [PATCH v2 2/3] config: handle conditional include when $GIT_DIR is not set up

[Jeff King <peff@peff.net>]

On Mon, Apr 17, 2017 at 07:56:47PM -0700, Junio C Hamano wrote:

> Junio C Hamano <gitster@pobox.com> writes:
> 
> >> +	if (!have_git_dir() && opts.git_dir) {
> >>  		struct git_config_source repo_config;
> >>  
> >>  		memset(&repo_config, 0, sizeof(repo_config));
> >
> > But this one I do not quite understand.  When have_git_dir() was
> > false and asked discover_git_directory() to set opts.git_dir, we
> > enter the body of this block and then end up doing
> >
> > 	git_config_with_options(cb, data &repo_config, &opts);
> >
> > with repo_config set to the discovered git directory plus "/config";
> > we'd read the repository configuration twice, in other words.
> 
> Ahh, nevermind.  The fix to make the "usual sequence" pay attention
> to the opts->git_dir comes in 3/3 and in that step this redundant
> reading is also removed, so all is well at the end.

I think 2/3 is actually OK as-is. We know we didn't read repo config in
the first call to git_config_with_options() because have_git_dir() is
unset.

So 2/3 doesn't make anything worse; the bug already existed before Duy's
series (it goes back to my original read_early_config() hack).

-Peff