GNU logs - #50026, boring messages

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Subject: bug#50026: Specify a pull-request in --with-branch package transformations
Resent-From: Philippe SWARTVAGHER <philippe.swartvagher@HIDDEN>
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From: Philippe SWARTVAGHER <philippe.swartvagher@HIDDEN>
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Date: Thu, 12 Aug 2021 11:38:38 +0200
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Hello,

A nice feature would be to be able to use a pull-request as branch to
specify in the `--with-branch` transformation option.

A use-case is to use a pull-request coming from a private fork, thus we
can't use the combination `--with-git-url=3D with-branch=3D`.


As an example, if I follow
https://gitlab.inria.fr/help/user/project/merge_requests/reviews/index.md=
#checkout-merge-requests-locally-through-the-head-ref,
I should be able to do something like:

```bash

guix build chameleon --with-branch=3Dchameleon=3Dmerge-requests/262/head

```

(with 262 being the pull-request I'm interested in) However, this fails:

```

guix build: erreur : impossible de r=C3=A9cup=C3=A9rer la branche =C2=AB
merge-requests/262/head =C2=BB depuis
https://gitlab.inria.fr/solverstack/chameleon : cannot locate
remote-tracking branch 'origin/merge-requests/262/head'
```

While commands stated in the documentation work well:

```bash

git clone https://gitlab.inria.fr/solverstack/chameleon && cd chameleon

git fetch origin merge-requests/262/head:mr-262

git checkout mr-262

```

I guess the fetch step is lacking in the way Guix handles the
`--with-branch` transformation.


FYI, Ansible is able to do things like that (see
https://docs.ansible.com/ansible/latest/collections/ansible/builtin/git_m=
odule.html),
by combining options `refspec` and `version`.


I'm aware a workaround is to download the patch corresponding to the
pull-request and using `--with-patch`, however handling it directly with
`--with-branch` would be more handy !

Thanks,

--=20
Philippe SWARTVAGHER

PhD Student
TADaaM team, Inria Bordeaux Sud-Ouest

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Philippe SWARTVAGHER <philippe.swartvagher@HIDDEN>
Subject: bug#50026: Acknowledgement (Specify a pull-request in
 --with-branch package transformations)
Message-ID: <handler.50026.B.162878047113118.ack <at> debbugs.gnu.org>
References: <29e470a4-89a3-2ac1-1fbd-f4a747443fb9@HIDDEN>
X-Gnu-PR-Message: ack 50026
X-Gnu-PR-Package: guix
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Date: Thu, 12 Aug 2021 15:02:03 +0000

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--=20
50026: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D50026
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