bug#51441: [PATCH] substitutes: keep base's uri-path for Properly construct URL.

["Ludovic Courtès" <ludo@gnu.org>]

Hi,

Peng Mei Yu <pengmeiyu@riseup.net> skribis:

> Z572 via Guix-patches via writes:
>
>> @@ -158,7 +159,8 @@ (define (narinfo-request cache-url path)
>>    "Return an HTTP request for the narinfo of PATH at CACHE-URL."
>>    (let* ((base (string->uri cache-url))
>>           (ref (build-relative-ref
>> -               #:path (string-append (store-path-hash-part path) ".narinfo")))
>> +               #:path (string-append (uri-path base) "/"
>> +                                     (store-path-hash-part path) ".narinfo")))
>>           (url (resolve-uri-reference ref base))
>>           (headers '((User-Agent . "GNU Guile"))))
>>      (build-request url #:method 'GET #:headers headers)))
>> --
>
> It seems that the root cause for the problem is that cache-url lacks a
> trailing slash.  Therefore the last path component is stripped from
> `base` when we compute (resolve-uri-reference ref base).  So I think
> ensuring cache-url ends with a slash ("/") is a better approach.

Indeed.  I’ve implemented your suggestion in
e68466de122d94ac3fa75aae234cd5fd89482a5a, and commit
cba0395c99005f94e4ccd6c058362af7443dab12 makes a related adjustment.

Note that we still need to update the ‘guix’ package so you can benefit
from the bug fix.  In the meantime you have to pass that trailing slash.

Thank you, and sorry for the delay!

Ludo’.