b3de22483c
This is a decomposition of the testing-python.nix and build-vms.nix
files into modules.
By refactoring the glue, we accomplish the following:
- NixOS tests can now use `imports` and other module system features.
- Network-wide test setup can now be reusable; example:
- A setup with all VMs configured to use a DNS server
- Split long, slow tests into multiple tests that import a
common module that has most of the setup.
- Type checking for the test arguments
- (TBD) "generated" options reference docs
- Aspects that had to be wired through all the glue are now in their
own files.
- Chief example: interactive.nix.
- Also: network.nix
In rewriting this, I've generally stuck as close as possible to the
existing code; copying pieces of logic and rewiring them, without
changing the logic itself.
I've made two exceptions to this rule
- Introduction of `extraDriverArgs` instead of hardcoded
interactivity logic.
- Incorporation of https://github.com/NixOS/nixpkgs/pull/144110
in testScript.nix.
I might revert the latter and split it into a new commit.
92 lines
2.5 KiB
Nix
92 lines
2.5 KiB
Nix
testModuleArgs@{ config, lib, hostPkgs, nodes, ... }:
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let
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inherit (lib) mkOption mkForce optional types mapAttrs mkDefault;
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system = hostPkgs.stdenv.hostPlatform.system;
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baseOS =
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import ../eval-config.nix {
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inherit system;
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inherit (config.node) specialArgs;
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modules = [ config.defaults ];
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baseModules = (import ../../modules/module-list.nix) ++
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[
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../../modules/virtualisation/qemu-vm.nix
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../../modules/testing/test-instrumentation.nix # !!! should only get added for automated test runs
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{ key = "no-manual"; documentation.nixos.enable = false; }
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{
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key = "no-revision";
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# Make the revision metadata constant, in order to avoid needless retesting.
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# The human version (e.g. 21.05-pre) is left as is, because it is useful
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# for external modules that test with e.g. testers.nixosTest and rely on that
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# version number.
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config.system.nixos.revision = mkForce "constant-nixos-revision";
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}
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{ key = "nodes"; _module.args.nodes = nodes; }
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({ config, ... }:
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{
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virtualisation.qemu.package = testModuleArgs.config.qemu.package;
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# Ensure we do not use aliases. Ideally this is only set
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# when the test framework is used by Nixpkgs NixOS tests.
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nixpkgs.config.allowAliases = false;
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})
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] ++ optional config.minimal ../../modules/testing/minimal-kernel.nix;
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};
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in
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{
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options = {
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node.type = mkOption {
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type = types.raw;
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default = baseOS.type;
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internal = true;
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};
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nodes = mkOption {
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type = types.lazyAttrsOf config.node.type;
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};
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defaults = mkOption {
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description = ''
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NixOS configuration that is applied to all {option}`nodes`.
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'';
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type = types.deferredModule;
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default = { };
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};
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node.specialArgs = mkOption {
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type = types.lazyAttrsOf types.raw;
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default = { };
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};
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minimal = mkOption {
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type = types.bool;
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default = false;
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};
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nodesCompat = mkOption {
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internal = true;
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};
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};
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config = {
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_module.args.nodes = config.nodesCompat;
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nodesCompat =
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mapAttrs
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(name: config: config // {
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config = lib.warn
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"Module argument `nodes.${name}.config` is deprecated. Use `nodes.${name}` instead."
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config;
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})
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config.nodes;
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passthru.nodes = config.nodesCompat;
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};
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}
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