Hi,
Well, I have missed if there is a reply. In case not. :-)
On mar., 26 déc. 2023 at 11:48, Alexander Asteroth
<alexander.aster...@h-brs.de> wrote:
> When I do
> ```
> $ guix shell --network --container --emulate-fhs bash coreutils -e
> '(list (@@ (gnu packages commencement) gcc) "lib")'
> ```
> I get a shell, that has `libstdc++.so.6` in `/lib`.
>
> But when I do
> ```
> $ guix package -e '(list (@@ (gnu packages commencement) gcc)
> "lib")'
> guix package: error: expression "(list (@@ (gnu packages
> commencement) gcc) \"lib\")" does not evaluate to a package
> ```
> I get an error. Why is that?
That’s because “guix shell” relies on ’read/eval’ and “guix package” on
’read/eval-package-expression’; both defined in the module (guix ui).
As you see,
--8<---------------cut here---------------start------------->8---
(define (read/eval-package-expression str)
"Read and evaluate STR and return the package it refers to, or exit an
error."
(match (read/eval str)
((? package? p) p)
(x
(leave (G_ "expression ~s does not evaluate to a package~%")
str))))
--8<---------------cut here---------------end--------------->8---
“guix package” expects that the expression returns a ’package’ when it
returns a list.
Well, indeed it seems inconsistent and “guix package” could be updated
to also just use ’read/eval’.
Cheers,
simon
