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From: Tobias Geerinckx-Rice <me@tobias.gr>
To: Rodrigo Morales <moralesrodrigo1100@gmail.com>
Cc: help-guix@gnu.org
Subject: Re: Newbie user question: What do the columns shown by "guix
 package -I" mean?
Date: Sun, 26 Feb 2023 21:31:58 +0100
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--=-=-=
Content-Type: text/plain; charset=utf-8; format=flowed
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Rodrigo Morales =E5=86=99=E9=81=93=EF=BC=9A
> Thanks! That's what I was looking for.

I'm glad to hear it!

> A related question: I didn't understand the part "retain=20
> backwards compatibility with isatty/stderr/etc."

First of all: I worded this poorly, as is my wont.  I should have=20
said =E2=80=98by using=E2=80=99 instead of =E2=80=98with=E2=80=99.  We're n=
ot trying to be=20
compatible with isatty or stderr=E2=80=A6

Wat I meant was Guix could use the =E2=80=98isatty=E2=80=99 Guile procedure=
 to=20
show decorate the columns only when the output is a TTY=20
(=E2=80=98interactive=E2=80=99), or print a header line to =E2=80=98stderr=
=E2=80=99 so it won't be=20
captured by a pipe.

I think that any such solution would be fragile, do the wrong=20
thing in at least one case, and add too much complexity just to=20
sometimes add a header.

Why not simply always add a header?

Someone might be using =E2=80=98guix package -I=E2=80=99 in a script, and p=
arsing=20
its output.  In fact I guarantee you that several people are doing=20
so behind closed doors right now!  Adding a header would break=20
such scripts.

I, personally, would welcome breaking their scripts=E2=80=94in exchange=20
for adding a =E2=80=98--format=3D<something machine-readable>=E2=80=99 opti=
on like=20
we already do for =E2=80=98guix search=E2=80=99.  A real API that's actuall=
y=20
reliable and supportable.  I think that's fair.

I just think I'd be outvoted and don't feel like starting a fight=20
:-)

Kind regards,

T G-R

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