Re: guix.scm and manifest.scm environment

[Richard Sent <richard@freakingpenguin.com>]

On 2024-01-09 09:45, jgart wrote:
> Hi Guixers,
> 
> Are the modules that are automatically pulled in to a guix.scm or 
> manifest.scm documented?
> 
> Those files are just scheme code but specifications->manifest is 
> available in the global namespace, for example.

Note that guix repl manifest.scm will fail due to an unused import. This 
is special magic when passing a manifest with -m.

Their presence seems to be from how load-manifest in environment.scm 
works. https://www.gnu.org/software/guile/manual/html_node/Loading.html. 
See that it uses load*, not load, creating a temporary module with the 
(guix profiles) and (gnu) modules loaded.

We can confirm this with
(display (module-uses (current-module)))
(force-output)

at the top of the manifest. Everything in those two modules is in scope. 
Similarly, since (gnu) re-exports all (gnu ...) public modules (see 
gnu.scm), the (gnu packages) module is in scope, so we have 
specifications->manifest.

I definitely wouldn't rely on this behavior, but that's my understanding 
of it. Didn't notice any documentation.
Richard Sent