GNU bug report logs - #43818
search-patches fails when there is a trailing slash on the Guix load path

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From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: 43818 <at> debbugs.gnu.org
Subject: bug#43818: [PATCH] packages: Fix a bug in %patch-path.
Date: Tue, 27 Oct 2020 12:41:40 -0400

Hello,

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

> Hi,
>
> Maxim Cournoyer <maxim.cournoyer <at> gmail.com> skribis:
>
>> Fixes <https://issues.guix.gnu.org/43818>.
>>
>> Having the Guix root trailed by a slash in the GUILE_LOAD_PATH would
>> previously cause %patch-path to not return an entry with the patches
>> sub-directory, leading to errors such as:
>>
>>    While executing meta-command:
>>    ERROR:
>>      1. &formatted-message:
>>          format: "~a: patch not found\n"
>>          arguments: ("icecat-use-older-reveal-hidden-html.patch")
>>
>> * gnu/packages.scm (strip-trailing-slash): New procedure.
>> (%patch-path): Use it to strip any trailing slash from the %load-path entries.
>> ---
>>  gnu/packages.scm | 9 ++++++++-
>>  1 file changed, 8 insertions(+), 1 deletion(-)
>
> How can this be reproduced, outside Geiser?  I tried:
>
>   ./pre-inst-env sh -c 'GUILE_LOAD_PATH=$PWD/:$GUILE_LOAD_PATH guix build icecat -n'
>
> with an explicit trailing slash, but it doesn’t trigger the problem.

That's because %patch-path searches for a match in all of the entries in
GUILE_LOAD_PATH, and pre-inst-env added a correct version:

modified   gnu/packages.scm
@@ -167,7 +167,7 @@ flags."
           (if (string=? directory %distro-root-directory)
               (string-append directory "/gnu/packages/patches")
               directory))
-        %load-path)))
+        (pk '%load-path %load-path))))

;;; (%load-path ("/home/maxim/src/guix/" "/home/maxim/src/guix"
    "/home/maxim/src/guix"
    "/gnu/store/dgnjvl87m41rmlcgskl9w1lq47wi77i3-profile/share/guile/site/3.0"
    "/gnu/store/9c4l0pj3rz2kgr984fqxa8fwblkllnz1-profile/share/guile/site/3.0"
    [...]
    "/gnu/store/ah16zr8mmfkqy23rr7jy5a842ca1q9h1-guile-3.0.4/share/guile"))

The following should reproduce it:

$ GUILE_LOAD_PATH=$PWD/:$GUILE_LOAD_PATH GUILE_LOAD_COMPILED_PATH=$PWD:$GUILE_LOAD_COMPILED_PATH guile -c '(use-modules (gnu packages linux))'
Backtrace:
In ice-9/boot-9.scm:
  3393:24 19 (_)
   222:29 18 (map1 (((guix licenses) #:select (lgpl2.0+)) ((guix packages)) ((guix download)) ((guix build-system cmake)) ((guix build-system gnu)) ((gnu packages)) ((gnu packages freedesktop)) ((gnu # #)) # …))
   222:29 17 (map1 (((guix packages)) ((guix download)) ((guix build-system cmake)) ((guix build-system gnu)) ((gnu packages)) ((gnu packages freedesktop)) ((gnu packages glib)) ((gnu packages gtk)) ((# …)) …))
   222:29 16 (map1 (((guix download)) ((guix build-system cmake)) ((guix build-system gnu)) ((gnu packages)) ((gnu packages freedesktop)) ((gnu packages glib)) ((gnu packages gtk)) ((gnu packages gnuzilla)) …))
   222:29 15 (map1 (((guix build-system cmake)) ((guix build-system gnu)) ((gnu packages)) ((gnu packages freedesktop)) ((gnu packages glib)) ((gnu packages gtk)) ((gnu packages gnuzilla)) ((gnu packages …)) …))
   222:29 14 (map1 (((guix build-system gnu)) ((gnu packages)) ((gnu packages freedesktop)) ((gnu packages glib)) ((gnu packages gtk)) ((gnu packages gnuzilla)) ((gnu packages linux)) ((gnu packages nss)) # …))
   222:29 13 (map1 (((gnu packages)) ((gnu packages freedesktop)) ((gnu packages glib)) ((gnu packages gtk)) ((gnu packages gnuzilla)) ((gnu packages linux)) ((gnu packages nss)) ((gnu packages perl)) ((…)) …))
   222:29 12 (map1 (((gnu packages freedesktop)) ((gnu packages glib)) ((gnu packages gtk)) ((gnu packages gnuzilla)) ((gnu packages linux)) ((gnu packages nss)) ((gnu packages perl)) ((gnu packages #)) (#) #))
   222:29 11 (map1 (((gnu packages glib)) ((gnu packages gtk)) ((gnu packages gnuzilla)) ((gnu packages linux)) ((gnu packages nss)) ((gnu packages perl)) ((gnu packages pkg-config)) ((gnu packages qt)) ((…))))
   222:29 10 (map1 (((gnu packages gtk)) ((gnu packages gnuzilla)) ((gnu packages linux)) ((gnu packages nss)) ((gnu packages perl)) ((gnu packages pkg-config)) ((gnu packages qt)) ((gnu packages xml))))
   222:17  9 (map1 (((gnu packages gnuzilla)) ((gnu packages linux)) ((gnu packages nss)) ((gnu packages perl)) ((gnu packages pkg-config)) ((gnu packages qt)) ((gnu packages xml))))
  3297:17  8 (resolve-interface (gnu packages gnuzilla) #:select _ #:hide _ #:prefix _ #:renamer _ #:version _)
In ice-9/threads.scm:
    390:8  7 (_ _)
In ice-9/boot-9.scm:
  3223:13  6 (_)
In ice-9/threads.scm:
    390:8  5 (_ _)
In ice-9/boot-9.scm:
  3507:20  4 (_)
   2806:4  3 (save-module-excursion #<procedure 7f27e7785030 at ice-9/boot-9.scm:3508:21 ()>)
  3527:26  2 (_)
In unknown file:
           1 (primitive-load-path "gnu/packages/gnuzilla" #<procedure 7f27e7795aa0 at ice-9/boot-9.scm:3514:37 ()>)
In gnu/packages/gnuzilla.scm:
   598:23  0 (_)

gnu/packages/gnuzilla.scm:598:23: ERROR:
  1. &formatted-message:
      format: "~a: patch not found\n"
      arguments: ("icecat-use-older-reveal-hidden-html.patch")

Thanks!

Maxim

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