Subject: Re: bug#33100: [libssh] fatal: dumb http transport does not support shallow capabilities

From: [email-masked] (Ludovic Courtès)
Date: Wed, 24 Oct 2018 23:33:03 +0200

Leo Famulari <[email-masked]> skribis:

> On Wed, Oct 24, 2018 at 09:01:07AM -0400, Maxim Cournoyer wrote:
>> From 06ba66d1949ba59573518f471ad3cbacefea6ea2 Mon Sep 17 00:00:00 2001
>> From: Maxim Cournoyer <[email-masked]>
>> Date: Wed, 24 Oct 2018 08:49:50 -0400
>> Subject: [PATCH] build: git-fetch: Print message when falling back to a full
>>  checkout.
>> 
>> Otherwise the user might believe that git-fetch stalled, observing the lack of
>> output following a 'fatal' git error message (see:
>> https://debbugs.gnu.org/33100).
>> 
>> * guix/build/git.scm (git-fetch): Print message when falling back to a full
>> checkout.
>
> I like it, but it doesn't seem to actually print anything for me when I
> trigger the failing case, for example by fetching the libssh source over
> HTTP.

If might be that current-output-port is fully buffered.  What if you
add:

  (setvbuf (current-output-port) 'line)

before the ‘format’ call?

Thanks,
Ludo’, who is found guilty of not actually running the code.