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testModuleArgs@{ config, lib, hostPkgs, nodes, moduleType, ... }:
let
inherit (lib) mkOption types mdDoc;
inherit (types) either str functionTo;
in
{
options = {
testScript = mkOption {
type = either str (functionTo str);
description = mdDoc ''
A series of python declarations and statements that you write to perform
the test.
'';
};
testScriptString = mkOption {
type = str;
readOnly = true;
internal = true;
};
includeTestScriptReferences = mkOption {
type = types.bool;
default = true;
internal = true;
};
withoutTestScriptReferences = mkOption {
type = moduleType;
description = mdDoc ''
A parallel universe where the testScript is invalid and has no references.
'';
internal = true;
visible = false;
};
};
config = {
withoutTestScriptReferences.includeTestScriptReferences = false;
withoutTestScriptReferences.testScript = lib.mkForce "testscript omitted";
testScriptString =
if lib.isFunction config.testScript
then
config.testScript
{
nodes =
lib.mapAttrs
(k: v:
if v.virtualisation.useNixStoreImage
then
# prevent infinite recursion when testScript would
# reference v's toplevel
config.withoutTestScriptReferences.nodesCompat.${k}
else
# reuse memoized config
v
)
config.nodesCompat;
}
else config.testScript;
defaults = { config, name, ... }: {
# Make sure all derivations referenced by the test
# script are available on the nodes. When the store is
# accessed through 9p, this isn't important, since
# everything in the store is available to the guest,
# but when building a root image it is, as all paths
# that should be available to the guest has to be
# copied to the image.
virtualisation.additionalPaths =
lib.optional
# A testScript may evaluate nodes, which has caused
# infinite recursions. The demand cycle involves:
# testScript -->
# nodes -->
# toplevel -->
# additionalPaths -->
# hasContext testScript' -->
# testScript (ad infinitum)
# If we don't need to build an image, we can break this
# cycle by short-circuiting when useNixStoreImage is false.
(config.virtualisation.useNixStoreImage && builtins.hasContext testModuleArgs.config.testScriptString && testModuleArgs.config.includeTestScriptReferences)
(hostPkgs.writeStringReferencesToFile testModuleArgs.config.testScriptString);
};
};
}
|
