Felipe Contreras <felipe.contre...@gmail.com> writes:

> On Wed, May 29, 2013 at 1:26 PM, Ramkumar Ramachandra
> <artag...@gmail.com> wrote:
>> BrĂ¡ulio Bhavamitra wrote:
>>>   root = rev-parse --show-toplevel
>> What is your usecase for this?
> Some Git commands expect to be in the top level directory (e.g. git blame).

"Git" things we can fix [*1*], but more importantly, build structure
of many project may require you to go up to the top to build the
whole thing, so being able to get a relative path to the top when
you are deep inside is a necessity.


*1* "blame" is an oddball (and I suspect the recent log -Ln,m:path
    may share the same) in that it really wants a concret path, not
    a pathspec, so you cannot even say

        cd Documentation; git blame :/Makefile

    I think the right fix is to teach it that the argument it has
    been taking as a pathname is actually a pathspec, match the
    pathspec with appropriate place (either in the working tree, or
    in the commit we start digging from), and use the path that the
    pathspec matches to a single one (otherwise barf).

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