From: Alex Riesen <raa.lkml@gmail.com>
Date: Tue, 18 Dec 2007 22:29:55 GMT
Subject: Re: log/show: relative pathnames do not work in rev:path
Message-ID: <20071218222955.GI2875@steel.home>
In-Reply-To: <56b7f5510712181408g4aee55d2j2a7f0f13bf90323d@mail.gmail.com>

Dana How, Tue, Dec 18, 2007 23:08:33 +0100:
> When it *does* refer to a commit,  then for commit:relpath you prefix
> relpath with the suffix of the cwd which is an extension beyond the root
> of the working tree.

...universally known as "prefix" (the last argument of builtin
commands) :)

> > where the magic is *not* done by any "SHA1 path lookup" at all, but is
> > simply done by the commit->tree lookup. At least at that point it would
> > make logical sense (although it would probably be quite painful to
> > implement).
> 
> I must be missing something.  The old patch I submitted did this.
> Its defect was that it did NOT make the cwd insertion conditional
> on whether the tree-ish involved a commit or not (a test which also
> _seems_ doable,  but I don't think I finished it & sent it in).

It is also a bit painful: lots of funtions (sha1_name.c) will have
their prototypes changed to get the prefix (aka suffix). And their
callers...