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nixos/testing: Add node.pkgsReadOnly escape hatch

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By adding this option indirection, a test can declare all by itself
that it needs a custom nixpkgs. This is a more convenient way of
going about this when the caller of the test framework receives a
`node.pkgs` unconditionally.
This commit is contained in:
Robert Hensing 2023-05-07 17:39:08 +02:00
parent f659db7ba2
commit 0f83261f0e
1 changed files with 23 additions and 2 deletions
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25
nixos/lib/testing/nodes.nix
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@ -1,7 +1,17 @@
testModuleArgs@{ config, lib, hostPkgs, nodes, ... }:
let
inherit (lib) mkOption mkForce optional types mapAttrs mkDefault mkIf mdDoc;
inherit (lib)
literalExpression
literalMD
mapAttrs
mdDoc
mkDefault
mkIf
mkOption mkForce
optional
types
;
baseOS =
import ../eval-config.nix {
@ -85,6 +95,17 @@ in
'';
};
node.pkgsReadOnly = mkOption {
description = mdDoc ''
Whether to make the `nixpkgs.*` options read-only. This is only relevant when [`node.pkgs`](#test-opt-node.pkgs) is set.
Set this to `false` when any of the [`nodes`](#test-opt-nodes) needs to configure any of the `nixpkgs.*` options. This will slow down evaluation of your test a bit.
'';
type = types.bool;
default = config.node.pkgs != null;
defaultText = literalExpression ''node.pkgs != null'';
};
node.specialArgs = mkOption {
type = types.lazyAttrsOf types.raw;
default = { };
@ -118,7 +139,7 @@ in
passthru.nodes = config.nodesCompat;
defaults = mkIf (config.node.pkgs != null) {
defaults = mkIf config.node.pkgsReadOnly {
nixpkgs.pkgs = config.node.pkgs;
imports = [ ../../modules/misc/nixpkgs/read-only.nix ];
disabledModules = [{ key = "nodes.nix-pkgs"; }];