Re: [PATCH 2/2] pack-refs: add fully-peeled trait

[Jeff King <peff@peff.net>]

On Sat, Mar 16, 2013 at 03:06:22PM +0100, Michael Haggerty wrote:

> >  		refname = parse_ref_line(refline, sha1);
> >  		if (refname) {
> > -			last = create_ref_entry(refname, sha1, flag, 1);
> > +			/*
> > +			 * Older git did not write peel lines for anything
> > +			 * outside of refs/tags/; if the fully-peeled trait
> > +			 * is not set, we are dealing with such an older
> > +			 * git and cannot assume an omitted peel value
> > +			 * means the ref is not a tag object.
> > +			 */
> > +			int this_flag = flag;
> > +			if (!fully_peeled && prefixcmp(refname, "refs/tags/"))
> > +				this_flag &= ~REF_KNOWS_PEELED;
> > +
> > +			last = create_ref_entry(refname, sha1, this_flag, 1);
> >  			add_ref(dir, last);
> >  			continue;
> >  		}
> 
> I have to admit that I am partial to my variant of this code [1] because
> the logic makes it clearer when the affirmative decision can be made to
> set the REF_KNOWS_PEELED flag.  But this version also looks correct to
> me and equivalent (aside from the idea that a few lines later if a
> peeled value is found then the REF_KNOWS_PEELED bit could also be set).

Yeah, I think they are equivalent, but I agree yours is a little more
readable. I'll switch it in my re-roll, and I will go ahead and set the
REF_KNOWS_PEELED bit when we see a peel line. That code should not be
triggered in general, but it is the sane thing for the reader to do, so
it makes the code more obvious and readable.

-Peff