Re: [PATCH v1 2/3] cvsexportcommit: do not run git programs in dashed form

> Eric Sunshine <sunshine@sunshineco.com> writes:
>
>> On Tue, Aug 25, 2020 at 9:17 PM Junio C Hamano <gitster@pobox.com> wrote:
>>> This ancient script runs "git-foo" all over the place.  A strange
>>> thing is that it has t9200 tests successfully running, even though
>>> it does not seem to futz with PATH to prepend $(git --exec-path)
>>> output.
>>
>> t/test-lib.sh takes care of that for us, doesn't it?
>
> Actually, it is "git" itself.  
>
> The tests spawn "git cvsexportcommit" via the "git" dispatcher.  The
> dispatcher adds GIT_EXEC_PATH to PATH in exec-cmd.c::setup_path()
> and that is used to (1) locate "git-foo" from /usr/libexec/git-core/
> that are not builtin and (2) passed to any processes we invoke.  I
> think the latter was originally done primarily for not breaking
> hooks, but that is what allows this script going in this particular
> case.
>
> If this were only a fluke in the test that kept otherwise unrunnable
> script passing, I'd say it is an evidence enough that lets us drop
> the cvsexportcommit immediately, but now I rediscovered how it was
> supposed to work and saw how it actually does work as designed, I
> would not be surprised if it is still used in the wild.