Subject: bug#50289: closed (Re: bug#50289: [PATCH] import: go: Fix import when import path redirects.)

From: [email-masked] (GNU bug Tracking System)
Date: Tue, 07 Sep 2021 13:56:02 +0000

Your bug report

#50289: [PATCH] import: go: Fix import when import path redirects.

which was filed against the guix-patches package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to [email-masked].

-- 
50289: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=50289
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Subject: Re: bug#50289: [PATCH] import: go: Fix import when import path redirects.
From: Ludovic Courtès <[email-masked]>
To: Sarah Morgensen <[email-masked]>
Cc: Attila Lendvai <[email-masked]>, [email-masked]
Date: Tue, 07 Sep 2021 15:55:16 +0200
List-Id: <debbugs-submit.debbugs.gnu.org>

Hi,

Sarah Morgensen <[email-masked]> skribis:

> * guix/import/go.scm (fetch-module-meta-data): If no meta entries
> have a matching import prefix, return the first entry instead of #f.
> ---
> X-Debbugs-CC: Attila Lendvai <[email-masked]>
>
> Hello Guix,
>
> As reported by Attila on IRC, the Go importer currently chokes when the
> import path URL redirects, for example with "github.com/prometheus/tsdb".
>
> This is due to my modification to 'fetch-module-meta-data' to handle multiple
> package's meta tags on one page [0].  It selects the meta based on whether its
> import prefix matches the URL we requested.  This breaks when the URL
> redirects but the import path is not changed (I did not realize that this
> was valid... go figure).  This patch fixes that by falling back to the first
> meta if none match.
>
> [0] https://issues.guix.gnu.org/49591

Applied, thank you!

Ludo’.

Subject: [PATCH] import: go: Fix import when import path redirects.
From: Sarah Morgensen <[email-masked]>
To: [email-masked]
Date: Mon, 30 Aug 2021 19:05:19 -0700
List-Id: <debbugs-submit.debbugs.gnu.org>

* guix/import/go.scm (fetch-module-meta-data): If no meta entries
have a matching import prefix, return the first entry instead of #f.
---
X-Debbugs-CC: Attila Lendvai <[email-masked]>

Hello Guix,

As reported by Attila on IRC, the Go importer currently chokes when the
import path URL redirects, for example with "github.com/prometheus/tsdb".

This is due to my modification to 'fetch-module-meta-data' to handle multiple
package's meta tags on one page [0].  It selects the meta based on whether its
import prefix matches the URL we requested.  This breaks when the URL
redirects but the import path is not changed (I did not realize that this
was valid... go figure).  This patch fixes that by falling back to the first
meta if none match.

[0] https://issues.guix.gnu.org/49591

--
Sarah

 guix/import/go.scm | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/guix/import/go.scm b/guix/import/go.scm
index 617a0d0e23..57a135b9a9 100644
--- a/guix/import/go.scm
+++ b/guix/import/go.scm
@@ -483,9 +483,12 @@ (define (fetch-module-meta-data module-path)
     (match (select (html->sxml meta-data #:strict? #t))
       (() #f)                           ;nothing selected
       ((('content content-text) ..1)
-       (find (lambda (meta)
-               (string-prefix? (module-meta-import-prefix meta) module-path))
-             (map go-import->module-meta content-text))))))
+       (or
+        (find (lambda (meta)
+                (string-prefix? (module-meta-import-prefix meta) module-path))
+              (map go-import->module-meta content-text))
+        ;; Fallback to the first meta if no import prefixes match.
+        (go-import->module-meta (first content-text)))))))
 
 (define (module-meta-data-repo-url meta-data goproxy)
   "Return the URL where the fetcher which will be used can download the

base-commit: 994d8ce394e88b55985241b7b14f6a8459bcf9e8
-- 
2.31.1