Hi Ludo,
On Wed, 6 Nov 2019 at 17:42, Ludovic Courtès <l...@gnu.org> wrote:
> >>> - A Scheme function to create a manifest for the necessary inputs of a
> >>> package, like =guix environment PACKAGE= does. (Maybe it's already
> >>> possible?)
> >>
> >> Like ‘specifications->manifest’?
> >
> > Can specifications->manifest do this?
> >
> > Concrete example: You want a profile to work on IceCat, so you need a
> > manifest that has all the necessary inputs required to work with Icecat.
> > How can we automate the generation of the manifest?
>
> Ah, that no. But (guix scripts environment) has
> ‘package-environment-inputs’, which does exactly that, and I guess we
> could expose it and document it.
Maybe I am doing wrong but I get:
--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix package -p /tmp/guix-dev -m ~/tmp/manif-dep.scm
installing new manifest from '/home/simon/tmp/manif-dep.scm' with 53 entries
guix package: error: profile contains conflicting entries for gzip
guix package: error: first entry: gzip@1.10
/gnu/store/py3k9zla9fj3z7430v4crqj5pyrsd3qj-gzip-1.10
guix package: error: second entry: gzip@1.10
/gnu/store/i2cdl0hvrml8hjdqplqln8didnvxkgp5-gzip-1.10
hint: You cannot have two different versions or variants of `gzip' in
the same profile.
--8<---------------cut here---------------end--------------->8---
where I tweak guix/scripts/environment.scm to export
`package-environment-inputs' and ~/tmp/manif-dep.scm contains:
--8<---------------cut here---------------start------------->8---
(use-modules (guix)
(guix profiles)
(guix scripts environment)
(gnu packages package-management))
(make-manifest (package-environment-inputs guix))
--8<---------------cut here---------------end--------------->8---
> More generally, ‘guix environment’ was initially designed in a quite
> monolithic fashion, and I think we could expose its functionality in
> sizable bites. For instance, Dave suggested long ago exposing an
> <environment> data type, and that’s one thing that could be very useful.
What do you mean by an <environment> data type?
All the best,
simon
