From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: guix environment & PS1
Date: Wed, 01 Jul 2015 15:10:15 +0200
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	(David Thompson's message of "Thu, 25 Jun 2015 09:02:15 -0400")
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To: "Thompson, David" <dthompson2@worcester.edu>
Cc: guix-devel <guix-devel@gnu.org>

"Thompson, David" <dthompson2@worcester.edu> skribis:

> On Thu, Jun 25, 2015 at 7:45 AM, Ludovic Court=C3=A8s <ludo@gnu.org> wrot=
e:
>> Cyril Roelandt <tipecaml@gmail.com> skribis:
>>
>>> +(define (run-shell shell env-name)
>>> +  "Run the given SHELL, adding '(ENV-NAME) ' at the start of the promp=
t."
>>> +  (cond ((string=3D? shell "/bin/bash")
>>> +         (let* ((directory (or (getenv "TMPDIR") "/tmp"))
>>> +                (template  (string-append directory "/guix-file.XXXXXX=
"))
>>> +                (out       (mkstemp! template)))
>>> +           (format out "export PS1=3D\"(~a) $PS1\"" env-name)
>>> +           (flush-output-port out)
>>> +           (system (string-append "/bin/bash --rcfile " template))))
>>
>> What about this simpler idea: =E2=80=98guix environment=E2=80=99 would u=
nconditionally
>> do:
>>
>>   (setenv "GUIX_ENVIRONMENT" "t")
>>
>> and then users can choose in their .bashrc to use a separate PS1 when
>> GUIX_ENVIRONMENT is defined.
>>
>> WDYT?
>
> +1
>
> This is much better.

I=E2=80=99ve pushed something like that in =E2=80=98wip-environment=E2=80=
=99; comments welcome.

I reckon it has the unfortunate property of not working out of the box
(except on GuixSD.)  I=E2=80=99m sure many tools these days would choose to
hard-code a fancy colored PS1; while I prefer things that work out of
the box, I=E2=80=99m not comfortable with hard-coding such things.

Thoughts?

Ludo=E2=80=99.