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{ lib, pkgs }:
with lib.kernel;
with lib.asserts;
with lib.modules;
# To test nixos/modules/system/boot/kernel_config.nix;
let
# copied from release-lib.nix
assertTrue = bool:
if bool
then pkgs.runCommand "evaluated-to-true" {} "touch $out"
else pkgs.runCommand "evaluated-to-false" {} "false";
lts_kernel = pkgs.linuxPackages.kernel;
kernelTestConfig = structuredConfig: (lts_kernel.override {
structuredExtraConfig = structuredConfig;
}).configfile.structuredConfig;
mandatoryVsOptionalConfig = mkMerge [
{ USB_DEBUG = option yes;}
{ USB_DEBUG = yes;}
];
freeformConfig = mkMerge [
{ MMC_BLOCK_MINORS = freeform "32"; } # same as default, won't trigger any error
{ MMC_BLOCK_MINORS = freeform "64"; } # will trigger an error but the message is not great:
];
yesWinsOverNoConfig = mkMerge [
# default for "8139TOO_PIO" is no
{ "8139TOO_PIO" = yes; } # yes wins over no by default
{ "8139TOO_PIO" = no; }
];
in
{
# mandatory flag should win over optional
mandatoryCheck = (kernelTestConfig mandatoryVsOptionalConfig);
# check that freeform options are unique
# Should trigger
# > The option `settings.MMC_BLOCK_MINORS.freeform' has conflicting definitions, in `<unknown-file>' and `<unknown-file>'
freeformCheck = let
res = builtins.tryEval ( (kernelTestConfig freeformConfig).MMC_BLOCK_MINORS.freeform);
in
assertTrue (res.success == false);
yesVsNoCheck = let
res = kernelTestConfig yesWinsOverNoConfig;
in
assertTrue (res."8139TOO_PIO".tristate == "y");
}