Re: guix environment & PS1

[ludo@gnu.org (Ludovic Courtès)]

"Claes Wallin (韋嘉誠)" <gnu@clacke.user.lysator.liu.se> skribis:

> On Thu, Jun 25, 2015 at 3:28 PM, Ricardo Wurmus
> <ricardo.wurmus@mdc-berlin.de> wrote:
>> Thompson, David <dthompson2@worcester.edu> writes:
>>> On Thu, Jun 25, 2015 at 8:02 AM, Ricardo Wurmus
>>> <ricardo.wurmus@mdc-berlin.de> wrote:
>>>>
>>>> Would it be feasible to give "GUIX_ENVIRONMENT" the package name as a
>>>> value instead of just "t"?
>>>
>>> Not really, because 'guix environment' accepts any number of packages.
>>
>> Oh, right.  I forgot about ad-hoc environments and “guix environment
>> -l”.
>>
>> I’m mostly using “guix environment” with a single package name, and for
>> that purpose it would be nice if I could make the shell prompt indicate
>> for what package this environment was created.  I guess “t” as a value
>> for “GUIX_ENVIRONMENT” will have to do then.
>
> As the variable is mostly meant for human-readable display, I think
> setting it to "guix guile emacs" if those were the packages given, or
> "mypackage.scm" if that was the file given, is strictly an improvement
> over "t".

What about --ad-hoc?

People would start to have expectations about what this variable
contains, and it seems difficult to guarantee that we can always give it
a meaningful value.

Ludo’.