Hi Konrad, On Wed, 17 Mar 2021 at 18:55, Konrad Hinsen <konrad.hin...@fastmail.net> wrote:
> I wonder if there is a straightforward way to find the store path > corresponding to a package, assuming that the package actually is in the > store. I don't care if it's done via the CLI or via Guile code. does “guix build <package> -n” fit your use-case? > but it also downloads/builds the package if it's not yet in the store, > which is not what I want. In fact, I don't care what happens then the > package is not in the store. Returning a non-existing path is fine, > as is raising an error or returning #f. Well, ’package-output’ in (guix packages) is what you need, I guess. --8<---------------cut here---------------start------------->8--- $ guix gc -D $(guix build hello) 0.1 MB will be downloaded: /gnu/store/a462kby1q51ndvxdv3b6p0rsixxrgx1h-hello-2.10 substituting /gnu/store/a462kby1q51ndvxdv3b6p0rsixxrgx1h-hello-2.10... downloading from https://ci.guix.gnu.org/nar/lzip/a462kby1q51ndvxdv3b6p0rsixxrgx1h-hello-2.10 ... hello-2.10 51KiB 454KiB/s 00:00 [##################] 100.0% finding garbage collector roots... [0 MiB] deleting '/gnu/store/a462kby1q51ndvxdv3b6p0rsixxrgx1h-hello-2.10' deleting `/gnu/store/trash' deleting unused links... note: currently hard linking saves 20885.94 MiB $ guix repl GNU Guile 3.0.5 Copyright (C) 1995-2021 Free Software Foundation, Inc. Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'. This program is free software, and you are welcome to redistribute it under certain conditions; type `,show c' for details. Enter `,help' for help. scheme@(guix-user)> ,use(gnu packages base) ; hello scheme@(guix-user)> ,use(guix packages) ; package-output scheme@(guix-user)> ,use(guix store) ; with-store scheme@(guix-user)> (with-store store (package-output store hello)) $1 = "/gnu/store/a462kby1q51ndvxdv3b6p0rsixxrgx1h-hello-2.10" scheme@(guix-user)> ,q $ ls /gnu/store/a462kby1q51ndvxdv3b6p0rsixxrgx1h-hello-2.10 ls: cannot access '/gnu/store/a462kby1q51ndvxdv3b6p0rsixxrgx1h-hello-2.10': No such file or directory --8<---------------cut here---------------end--------------->8--- Hope that helps, simon
