GNU bug report logs - #45308
Emacs package broken with --with-commit transformation

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Message #8 received at 45308 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: zimoun <zimon.toutoune <at> gmail.com>
Cc: 45308 <at> debbugs.gnu.org
Subject: Re: bug#45308: Unexpected fail with build transformation --with-commit
Date: Fri, 18 Dec 2020 18:21:07 +0100

Hi!

zimoun <zimon.toutoune <at> gmail.com> skribis:

>            1 (copy-file "bin/emacs-git.2ea3466" "bin/emacs")
> In ice-9/boot-9.scm:
>   1669:16  0 (raise-exception _ #:continuable? _)
>
> ice-9/boot-9.scm:1669:16: In procedure raise-exception:
> In procedure copy-file: No such file or directory
> builder for `/gnu/store/h7s176h5d0fqjzz0ac4pdvzb7rb0dm9i-emacs-next-git.2ea3466.drv' failed with exit
> code 1

This comes from this phase in the ‘emacs’ package:

--8<---------------cut here---------------start------------->8---
             (with-directory-excursion (assoc-ref outputs "out")
               (copy-file (string-append
                           "bin/emacs-"
                           ,(let ((this-version (package-version this-package)))
                              (or (false-if-exception
                                   (version-major+minor+point this-version))
                                  (version-major+minor this-version))))
                          "bin/emacs")
               #t)
--8<---------------cut here---------------end--------------->8---

When using ‘--with-commit’, the ‘version’ field you end up with is
‘git.2ea3466’ as shown above, and so the trick above that constructs the
file name from the ‘version’ field no longer works.

Probably, instead of constructing the ‘emacs-X.Y’ file name like this,
we should instead use ‘scandir’ or ‘find-files’ and pick
‘bin/emacs-[0-9]+.[0-9]+’.

HTH!

Ludo’.

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