mirror of
https://github.com/nix-community/disko.git
synced 2024-11-04 05:44:29 +03:00
296 lines
12 KiB
Nix
296 lines
12 KiB
Nix
{ lib
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, makeTest
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, eval-config
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, ...
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}:
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let
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testLib = {
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# this takes a nixos config and changes the disk devices so we can run them inside the qemu test runner
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# basically changes all the disk.*.devices to something like /dev/vda or /dev/vdb etc.
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prepareDiskoConfig = cfg: devices:
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let
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cleanedTopLevel = lib.filterAttrsRecursive (n: _: !lib.hasPrefix "_" n) cfg;
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preparedDisks = lib.foldlAttrs
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(acc: n: v: {
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devices = lib.tail acc.devices;
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grub-devices = acc.grub-devices ++ (lib.optional (lib.any (part: (part.type or "") == "EF02") (lib.attrValues (v.content.partitions or { }))) (lib.head acc.devices));
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disks = acc.disks // {
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"${n}" = v // {
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device = lib.head acc.devices;
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content = v.content // { device = lib.head acc.devices; };
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};
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};
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})
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{
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inherit devices;
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grub-devices = [ ];
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disks = { };
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}
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cleanedTopLevel.disko.devices.disk;
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in
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cleanedTopLevel // {
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boot.loader.grub.devices = if (preparedDisks.grub-devices != [ ]) then preparedDisks.grub-devices else [ "nodev" ];
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disko.devices = cleanedTopLevel.disko.devices // {
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disk = preparedDisks.disks;
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};
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};
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# list of devices generated inside qemu
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devices = [ "/dev/vda" "/dev/vdb" "/dev/vdc" "/dev/vdd" "/dev/vde" "/dev/vdf" ];
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# This is the test generator for a disko test
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makeDiskoTest =
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{ name
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, disko-config
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, extendModules ? null
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, pkgs ? import <nixpkgs> { }
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, extraTestScript ? ""
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, bootCommands ? ""
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, extraInstallerConfig ? { }
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, extraSystemConfig ? { }
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, efi ? !pkgs.hostPlatform.isRiscV64
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, postDisko ? ""
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, testMode ? "module" # can be one of direct module cli
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, testBoot ? true # if we actually want to test booting or just create/mount
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}:
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let
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makeTest' = args:
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makeTest args {
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inherit pkgs;
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inherit (pkgs) system;
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};
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# for installation we skip /dev/vda because it is the test runner disk
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importedDiskoConfig =
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if builtins.isPath disko-config then
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import disko-config
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else
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disko-config;
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diskoConfigWithArgs =
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if builtins.isFunction importedDiskoConfig then
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importedDiskoConfig { inherit lib; }
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else
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importedDiskoConfig;
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testConfigInstall = testLib.prepareDiskoConfig diskoConfigWithArgs (lib.tail testLib.devices);
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# we need to shift the disks by one because the first disk is the /dev/vda of the test runner
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# so /dev/vdb becomes /dev/vda etc.
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testConfigBooted = testLib.prepareDiskoConfig diskoConfigWithArgs testLib.devices;
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tsp-generator = pkgs.callPackage ../. { checked = true; };
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tsp-format = (tsp-generator.formatScript testConfigInstall) pkgs;
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tsp-mount = (tsp-generator.mountScript testConfigInstall) pkgs;
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tsp-disko = (tsp-generator.diskoScript testConfigInstall) pkgs;
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tsp-config = tsp-generator.config testConfigBooted;
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num-disks = builtins.length (lib.attrNames testConfigBooted.disko.devices.disk);
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installed-system = { ... }: {
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imports = [
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(lib.optionalAttrs (testMode == "direct") tsp-config)
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(lib.optionalAttrs (testMode == "module") {
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disko.enableConfig = true;
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imports = [
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../module.nix
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testConfigBooted
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];
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})
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];
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# config for tests to make them run faster or work at all
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documentation.enable = false;
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hardware.enableAllFirmware = lib.mkForce false;
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boot.initrd.preDeviceCommands = ''
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echo -n 'secretsecret' > /tmp/secret.key
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'';
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boot.consoleLogLevel = lib.mkForce 100;
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boot.loader.systemd-boot.enable = lib.mkDefault efi;
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};
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installed-system-eval = eval-config {
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modules = [ installed-system ];
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inherit (pkgs) system;
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};
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installedTopLevel = ((if extendModules != null then extendModules else installed-system-eval.extendModules) {
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modules = [({config, ...}: {
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imports = [
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extraSystemConfig
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({ modulesPath, ... }: {
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imports = [
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(modulesPath + "/testing/test-instrumentation.nix") # we need these 2 modules always to be able to run the tests
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(modulesPath + "/profiles/qemu-guest.nix")
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];
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disko.devices = lib.mkForce testConfigBooted.disko.devices;
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})
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];
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# since we boot on a different machine, the efi payload needs to be portable
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boot.loader.grub.efiInstallAsRemovable = efi;
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boot.loader.grub.efiSupport = efi;
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boot.loader.systemd-boot.graceful = true;
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# we always want the bind-mounted nix store. otherwise tests take forever
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fileSystems."/nix/store" = lib.mkForce {
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device = "nix-store";
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fsType = "9p";
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neededForBoot = true;
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options = [ "trans=virtio" "version=9p2000.L" "cache=loose" ];
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};
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boot.zfs.devNodes = "/dev/disk/by-uuid"; # needed because /dev/disk/by-id is empty in qemu-vms
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# grub will install to these devices, we need to force those or we are offset by 1
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# we use mkOveride 70, so that users can override this with mkForce in case they are testing grub mirrored boots
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boot.loader.grub.devices = lib.mkOverride 70 testConfigInstall.boot.loader.grub.devices;
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assertions = [
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{
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assertion = builtins.length config.boot.loader.grub.mirroredBoots > 1 -> config.boot.loader.grub.devices == [];
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message = ''
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When using `--vm-test` in combination with `mirroredBoots`,
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it is necessary to configure `boot.loader.grub.devices` as an empty list by setting `boot.loader.grub.devices = lib.mkForce [];`.
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This adjustment is crucial because the `--vm-test` mechanism automatically overrides the grub boot devices as part of the virtual machine test.
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'';
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}
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];
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})];
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}).config.system.build.toplevel;
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in
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makeTest' {
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name = "disko-${name}";
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nodes.machine = { pkgs, ... }: {
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imports = [
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(lib.optionalAttrs (testMode == "module") {
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imports = [
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../module.nix
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];
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disko = {
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enableConfig = false;
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checkScripts = true;
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devices = testConfigInstall.disko.devices;
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};
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})
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extraInstallerConfig
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# from base.nix
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({ config, ... }: {
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boot.supportedFilesystems =
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[ "btrfs" "cifs" "f2fs" "jfs" "ntfs" "reiserfs" "vfat" "xfs" ] ++
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lib.optional (config.networking.hostId != null && lib.meta.availableOn pkgs.stdenv.hostPlatform config.boot.zfs.package) "zfs";
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})
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(if lib.versionAtLeast (lib.versions.majorMinor lib.version) "23.11" then {
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boot.swraid.enable = true;
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} else {
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boot.initrd.services.swraid.enable = true;
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})
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];
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systemd.services.mdmonitor.enable = false; # silence some weird warnings
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environment.systemPackages = [
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pkgs.jq
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];
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# speed-up eval
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documentation.enable = false;
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nix.settings = {
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substituters = lib.mkForce [ ];
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hashed-mirrors = null;
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connect-timeout = 1;
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};
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networking.hostId = lib.mkIf
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(
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(testConfigInstall ? networking.hostId) && (testConfigInstall.networking.hostId != null)
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)
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testConfigInstall.networking.hostId;
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virtualisation.emptyDiskImages = builtins.genList (_: 4096) num-disks;
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# useful for debugging via repl
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system.build.systemToInstall = installed-system-eval;
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};
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testScript = { nodes, ... }: ''
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def disks(oldmachine, num_disks):
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disk_flags = ""
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for i in range(num_disks):
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disk_flags += f' -drive file={oldmachine.state_dir}/empty{i}.qcow2,id=drive{i + 1},if=none,index={i + 1},werror=report'
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disk_flags += f' -device virtio-blk-pci,drive=drive{i + 1}'
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return disk_flags
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def create_test_machine(oldmachine, args={}): # taken from <nixpkgs/nixos/tests/installer.nix>
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startCommand = "${pkgs.qemu_test}/bin/qemu-kvm"
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startCommand += " -cpu max -m 1024 -virtfs local,path=/nix/store,security_model=none,mount_tag=nix-store"
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startCommand += disks(oldmachine, ${toString num-disks})
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${lib.optionalString efi ''
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startCommand +=" -drive if=pflash,format=raw,unit=0,readonly=on,file=${pkgs.OVMF.firmware} -drive if=pflash,format=raw,unit=1,readonly=on,file=${pkgs.OVMF.variables}"
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''}
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machine = create_machine({
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"startCommand": startCommand,
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} | args)
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driver.machines.append(machine)
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return machine
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machine.start()
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machine.succeed("echo -n 'additionalSecret' > /tmp/additionalSecret.key")
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machine.succeed("echo -n 'secretsecret' > /tmp/secret.key")
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${lib.optionalString (testMode == "direct") ''
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# running direct mode
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machine.succeed("${tsp-format}")
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machine.succeed("${tsp-mount}")
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machine.succeed("${tsp-mount}") # verify that mount is idempotent
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machine.succeed("${tsp-disko}") # verify that we can destroy and recreate
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machine.succeed("mkdir -p /mnt/home")
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machine.succeed("touch /mnt/home/testfile")
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machine.succeed("${tsp-format}") # verify that format is idempotent
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machine.succeed("test -e /mnt/home/testfile")
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''}
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${lib.optionalString (testMode == "module") ''
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# running module mode
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machine.succeed("${nodes.machine.system.build.formatScript}")
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machine.succeed("${nodes.machine.system.build.mountScript}")
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machine.succeed("${nodes.machine.system.build.mountScript}") # verify that mount is idempotent
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machine.succeed("${nodes.machine.system.build.diskoScript}") # verify that we can destroy and recreate again
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machine.succeed("mkdir -p /mnt/home")
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machine.succeed("touch /mnt/home/testfile")
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machine.succeed("${nodes.machine.system.build.formatScript}") # verify that format is idempotent
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machine.succeed("test -e /mnt/home/testfile")
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''}
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${postDisko}
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${lib.optionalString testBoot ''
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# mount nix-store in /mnt
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machine.succeed("mkdir -p /mnt/nix/store")
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machine.succeed("mount --bind /nix/store /mnt/nix/store")
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machine.succeed("nix-store --load-db < ${pkgs.closureInfo {rootPaths = [installedTopLevel];}}/registration")
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# fix "this is not a NixOS installation"
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machine.succeed("mkdir -p /mnt/etc")
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machine.succeed("touch /mnt/etc/NIXOS")
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machine.succeed("mkdir -p /mnt/nix/var/nix/profiles")
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machine.succeed("nix-env -p /mnt/nix/var/nix/profiles/system --set ${installedTopLevel}")
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machine.succeed("NIXOS_INSTALL_BOOTLOADER=1 nixos-enter --root /mnt -- ${installedTopLevel}/bin/switch-to-configuration boot")
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machine.succeed("sync")
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machine.shutdown()
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machine = create_test_machine(oldmachine=machine, args={ "name": "booted_machine" })
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machine.start()
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${bootCommands}
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machine.wait_for_unit("local-fs.target")
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''}
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${extraTestScript}
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'';
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};
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};
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in
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testLib
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