From: Ramkumar Ramachandra <artagnon@gmail.com>
Date: Wed, 29 May 2013 21:26:20 GMT
Subject: Re: [git-users] Highlevel (but simple to implement) commands provided by default for git
Message-ID: <CALkWK0mZqaUHObNqXKeY7=BCOq-0iHtMvtc_eNANHN8Hw8G-fQ@mail.gmail.com>
In-Reply-To: <7vtxllqyhz.fsf@alter.siamese.dyndns.org>

Junio C Hamano wrote:
> The whole point of show-cdup is that people (especially those in
> java land) bury themselves in a hierarchy so deep that it is not
> feasible to tell "Go count the hierarchy and prefix that many ../
> yourself" to them.

Ah.

> The answer to "we cannot count ../" issue is ":(top)" aka ":/" magic
> pathspec modifier.

I thought :/ was a revspec, which is why I was scratching my head so
hard.  Did we introduce this ambiguity intentionally?

This errors out:

  git log :/Makefile

So, I have to do either of these:

  git log :/Makefile --
  git log -- :/Makefile

depending on what I want.

> "git blame" takes a single pathname, not "a set of patterns to match
> against to select concrete paths", which is what a pathspec is.

So the problem is that I can't do:

  git blame -- :/Makefile

So blame has to be converted to use pathspec semantics, and should
error out when the pathspec doesn't match the concrete path of a file.