Re: hiding “guix system” messages

[ludo@gnu.org (Ludovic Courtès)]

Hello!

Ricardo Wurmus <rekado@elephly.net> skribis:

> when installing / building / reconfiguring a system, Guix spawns a few
> tools that produce output that might be confusing or misleading.  One
> example is the output of the GRUB installation, which says things like
> “Installation finished. No error reported.” or that it’s installing
> something for a 386 system.
>
> I think we should hide (redirect to a log file) or at least prefix
> messages that are produced by tools that Guix spawns.  We could then
> deliberately print messages that indicate the “phases” of installing the
> system, such as “Installing GRUB…”, “Creating user accounts…”, etc.

Prefixing sounds like a good idea; hiding might end up hiding too much,
so I’m more wary about that.

If we do prefixing, probably we just need a variant of ‘invoke’ that
runs the program in a pipe, reads its output, and prints the prefixed
lines.

Thoughts?

Ludo’.