Hi!
Commit 7ca87354db53fd1e1a7a3dfeddb9a598ea064bbe adds (guix module),
which provides a way to compute the closure of a Scheme module by
looking at its source code.
This has to do with typical ‘with-imported-modules’ usage, as explained
in the manual:
--8<---------------cut here---------------start------------->8---
Usually you want the _closure_ of the module to be imported—i.e., the
module itself and all the modules it depends on—rather than just the
module; failing to do that, attempts to use the module will fail because
of missing dependent modules. The ‘source-module-closure’ procedure
computes the closure of a module by looking at its source file headers,
which comes in handy in this case:
(use-modules (guix modules)) ;for 'source-module-closure'
(with-imported-modules (source-module-closure
'((guix build utils)
(gnu build vm)))
(gexp->derivation "something-with-vms"
#~(begin
(use-modules (guix build utils)
(gnu build vm))
...)))
--8<---------------cut here---------------end--------------->8---
The benefit can be seen in the next commit:
http://git.savannah.gnu.org/cgit/guix.git/commit/?id=239c6e276214813f59f761c9dc5cc0e9d266b49b
Comments welcome!
Ludo’.
