Re: [PATCH v2] filter-branch -d: Export GIT_DIR earlier

[Lars Noschinski <lars@public.noschinski.de>]

* Johannes Schindelin <Johannes.Schindelin@gmx.de> [09-02-17 16:08]:
>On Tue, 17 Feb 2009, Lars Noschinski wrote:
>> The improved error handling catches a bug in filter-branch when using
>> -d pointing to a path outside any git repository:
>> 
>> $ mkdir foo
>> $ cd foo
>> $ git init
>> $ touch bar
>> $ git add bar
>> $ git commit -m bar
>> $ cd ..
>> $ git clone --bare foo
>> $ cd foo.git
>> $ git filter-branch -d /tmp/filter master
>> fatal: Not a git repository (or any of the parent directories): .git
>
>This could be written as
>
>	$ cd .git
>	$ git filter-branch -d /tmp/bla master

Does not work, as we get another (slightly misleading) error message:

/tmp/foo/.git$ git filter-branch -d /tmp/bar master
fatal: This operation must be run in a work tree
Cannot rewrite branch(es) with a dirty working directory.

But we do not need a bare repository at all to demonstrate this bug, so
we can skip even the 'cd .git'.

>Funny, git am -3 reports:
>
>	Did you hand edit your patch?
>	It does not apply to blobs recorded in its index.
>	Cannot fall back to three-way merge.

Hm, for some reason, format=flowed was enabled. I wonder, that it has
not bitten me earlier.

>We try to avoid cd'ing back, by using constructs like this:
>
>	(cd drepo &&
>	 ...
>	) &&

Ok, can do.

>After those two (maybe three) changes and your SOB: ACK.
>
>BTW the reason I wanted to test this thing is that I suspected that you 
>meant test_commit instead of make_commit.  But then, I realized that there 
>exists a make_commit in t7003... which shares the shortcoming of our 
>previous implementation of test_commit in that it adds ambiguities on 
>case-insensitive filesystems.

Yeah, I used make_commit to stay consistent with the rest of the file.
I'll change it to test_commit. I think as it does not bite us, it would
be unnecessary code churn to remove the remaining usage of make_commit?

>So I _had_ to look who introduced make_commit:
>
>	$ git blame -L '/make_commit/,/}/' t/t7003*
>
>Making a fool out of yourself -- priceless.

:)

  - Lars.