Merge pull request 'base: stabilize system.build.toplevel.outPath for vmVariant' (!105) from no-flake-in-vm into main

Reviewed-on: https://git.pvv.ntnu.no/Drift/pvv-nixos-config/pulls/105
Reviewed-by: Oystein Kristoffer Tveit <oysteikt@pvv.ntnu.no>
This commit is contained in:
Peder Bergebakken Sundt 2025-06-01 05:29:00 +02:00
commit eceb2ce4c7
2 changed files with 22 additions and 15 deletions

View File

@ -1,4 +1,4 @@
{ inputs, ... }:
{ lib, config, inputs, ... }:
{
nix = {
gc = {
@ -21,11 +21,16 @@
** use the same channel the system
** was built with
*/
registry = {
"nixpkgs".flake = inputs.nixpkgs;
"nixpkgs-unstable".flake = inputs.nixpkgs-unstable;
"pvv-nix".flake = inputs.self;
};
registry = lib.mkMerge [
{
"nixpkgs".flake = inputs.nixpkgs;
"nixpkgs-unstable".flake = inputs.nixpkgs-unstable;
}
# We avoid the reference to self in vmVariant to get a stable system .outPath for equivalence testing
(lib.mkIf (!config.virtualisation.isVmVariant) {
"pvv-nix".flake = inputs.self;
})
];
nixPath = [
"nixpkgs=${inputs.nixpkgs}"
"unstable=${inputs.nixpkgs-unstable}"

View File

@ -1,4 +1,4 @@
{ inputs, pkgs, lib, ... }:
{ config, inputs, pkgs, lib, ... }:
let
inputUrls = lib.mapAttrs (input: value: value.url) (import "${inputs.self}/flake.nix").inputs;
@ -26,12 +26,14 @@ in
# workaround for https://github.com/NixOS/nix/issues/6895
# via https://git.lix.systems/lix-project/lix/issues/400
environment.etc."current-system-flake-inputs.json".source
= pkgs.writers.writeJSON "flake-inputs.json" (
lib.flip lib.mapAttrs inputs (name: input:
# inputs.*.sourceInfo sans outPath, since writeJSON will otherwise serialize sourceInfo like a derivation
lib.removeAttrs (input.sourceInfo or {}) [ "outPath" ]
// { store-path = input.outPath; } # comment this line if you don't want to retain a store reference to the flake inputs
)
);
environment.etc = lib.mkIf (!config.virtualisation.isVmVariant) {
"current-system-flake-inputs.json".source
= pkgs.writers.writeJSON "flake-inputs.json" (
lib.flip lib.mapAttrs inputs (name: input:
# inputs.*.sourceInfo sans outPath, since writeJSON will otherwise serialize sourceInfo like a derivation
lib.removeAttrs (input.sourceInfo or {}) [ "outPath" ]
// { store-path = input.outPath; } # comment this line if you don't want to retain a store reference to the flake inputs
)
);
};
}