Hi,
On Sat, 30 Nov 2024 at 23:03, wifi via <[email protected]> wrote:
> I've been digging around looking for a way to build a complete build
> dependency and runtime dependency graph of every package and their
> derivations, but there doesn't appear to be a straightforward way to
> do it. If such a complete graph could be built, it seems to be only a
> matter of finding the leaf nodes and exporting those from the store.
Well, I think that you can write a manifest that walks the whole graph
and find the “leaf” packages, i.e., the packages that have no
dependents: packages that do appear elsewhere in any other packages.
Maybe there is some typo, but I think this manifest builds all the leaf
packages and thus it will build the whole packages of Guix.
Assuming, there is no mistake, I count 14143 leaf packages over 32459
packages.
Hope that helps.
Cheers,
simon
(use-modules (gnu packages)
(guix packages)
(guix sets)
(ice-9 match)
(ice-9 vlist)
(srfi srfi-1))
(define all (all-packages))
(define (p->k p)
(string-append (package-name p) "@" (package-version p)))
(define vall-packages
(fold (lambda (package result)
(vhash-cons (p->k package) package result))
vlist-null
all))
(define vleaf-packages
(vhash-fold (lambda (key package result)
(let loop ((dependencies (package-direct-inputs package))
(updated result))
(match dependencies
('() updated)
((or ((_ p) . tail)
((_ p _) . tail))
(if (package? p)
(loop tail
(vhash-delete (p->k p) updated))
(loop tail updated))))))
vall-packages
vall-packages))
(define leaf-packages
(vhash-fold (lambda (key package result)
(cons package result))
'()
vleaf-packages))
(packages->manifest
leaf-packages)
