GNU bug report logs - #31952
[PATCH] gnu: git: Update to 2.18.0.

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From: Marius Bakke <mbakke <at> fastmail.com>
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: 31952 <at> debbugs.gnu.org
Subject: [bug#31952] [PATCH] gnu: git: Update to 2.18.0.
Date: Sun, 24 Jun 2018 01:40:16 +0200

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ludo <at> gnu.org (Ludovic Courtès) writes:

> Hi Marius!
>
> Marius Bakke <mbakke <at> fastmail.com> skribis:
>
>> * gnu/packages/version-control.scm (git): Update to 2.18.0.
>> [native-inputs]: Add BASH.
>> [arguments]: In #:make-flags, define SHELL_PATH and TEST_SHELL_PATH.
>> Add #:disallowed-references.  Drop /bin/sh substitution from Makefile.  Add
>> phase to prevent BASH from ending up in PATH.  Delete 'patch-shebangs' phase.
>
> [...]
>
>> +        ;; FIXME: This phase picks up the wrong bash when patching shebangs.
>> +        (delete 'patch-shebangs)
>
> Do the installed scripts still have the right shebang in spite of this?

I haven't yet compared the results with and without this phase, but
"normal" usage (including "send-email") works at least.

> Removing this phase altogether sounds a bit risky.  Another option would
> have been to replace it with one that moves the “right” Bash to the
> front of PATH and then calls the original ‘patch-shebangs’ phase.

The problem is that 'patch-shebangs' does not use PATH, but instead
iterates over inputs directly.  It's supposed to prefer 'inputs' to
'native-inputs' (according to a comment), yet in this case it picks the
native "full" bash rather than bash-minimal.

If you read closely, you'll notice that 'bash-for-tests' is not in PATH
at all.  'patch-source-shebangs' and other things that use (which "sh")
works okay due to that.

I suppose we can replace the phase with a fixed version, but I'm not
sure why (@@ (guix build gnu-build-system) patch-shebangs) does the
wrong thing.

Another alternative is to delete the one test (t/t9902-completion.sh)
that requires the full bash until we have a proper fix.

Thoughts?

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