Re: git-describe considers WC dirty incorrectly when using --git-dir

[Junio C Hamano <gitster@pobox.com>]

Chris Pimlott <chris@pimlott.net> writes:

> It seems that git-describe always thinks that working copy is dirty if
> you are not in the WC root and you explicitly specify the .git
> directory location using --git-dir:
>
>   # set up test repo
>   folio:~ chris$ mkdir repo && cd repo
>   folio:repo chris$ mkdir text && echo hi > text/hi.txt
>   folio:repo chris$ git init . && git add . && git commit -m "text/hi.txt"
>   Initialized empty Git repository in /home/chris/repo/.git/
>   [master (root-commit) c0edd63] text/hi.txt
>   1 file changed, 1 insertion(+)
>   create mode 100644 text/hi.txt
>
>   # git-describe from non-root directory
>   folio:repo chris$ cd text
>   folio:text chris$ git describe --always --dirty
>   c0edd63
>   folio:text chris$ git --git-dir=../.git describe --always --dirty
>   c0edd63-dirty
>   folio:text chris$ git --git-dir=$(git rev-parse
> --show-toplevel)/.git describe --always --dirty
>   c0edd63-dirty

I have a feeling that this is not limited to describe at all.  With
the --git-dir option, you are telling Git that your GIT_DIR is over
there and (by not using --work-tree together with that option) you
are telling Git that you do not want Git to guess where the working
tree is (instead, you are telling Git that you are at the top of the
working tree), no?