GNU bug report logs - #55921
‘guix substitute’ displays nothing when connecting

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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: bug-guix@HIDDEN
Subject: =?utf-8?Q?=E2=80=98guix_substitute=E2=80=99?= displays nothing when
 connecting
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Hi,

=E2=80=98guix substitute=E2=80=99 displays nothing when it connects to subs=
titute
servers.  Thus, if the connection attempt stalls, =E2=80=98guix=E2=80=99 co=
mmands just
print nothing.

Here=E2=80=99s what =E2=80=98guix build=E2=80=99 sees when =E2=80=98guix su=
bstitute=E2=80=99 is busy trying to
connect to a server:

--8<---------------cut here---------------start------------->8---
11:31:00 read(13, "gmlo\0\0\0\0", 8)    =3D 8 <0.260108>
11:31:00 read(13, "\r\0\0\0\0\0\0\0", 8) =3D 8 <0.000017>
11:31:00 read(13, "substitute: \r\0\0\0", 16) =3D 16 <0.000018>
11:31:00 read(13, 0x40cddd0, 8)         =3D ? ERESTARTSYS (To be restarted =
if SA_RESTART is set) <3.681580>
11:31:04 --- SIGINT {si_signo=3DSIGINT, si_code=3DSI_KERNEL} ---
--8<---------------cut here---------------end--------------->8---

We should arrange so that =E2=80=98guix substitute=E2=80=99 prints an initi=
al message
instead of just clearing the line so that users have an idea of what=E2=80=
=99s
going on.

Ludo=E2=80=99.