2c55eba8f4
This commit fixes a papercut in nixos-rebuild where people wanting to switch to a specialisation (or test one) were forced to manually figure out the specialisation's path and run its activation script - since now, there's a dedicated option to do just that. This is a backwards-compatible change which doesn't affect the existing behavior, which - to be fair - might still be considered sus by some people, the painful scenario here being: - you boot into specialisation `foo`, - you run `nixos-rebuild switch`, - whoops, you're no longer at specialisation `foo`, but you're rather brought back to the base system. (it's especially painful for cases where specialisation is used to load extra drivers, e.g. Nvidia, since then launching `nixos-rebuild switch`, while forgetting that you're inside a specialisation, can cause some parts of your system to get accidentally unloaded.) I've tried to mitigate that by improving specialisations so that they create a dedicated file somewhere in `/run/current-system` containing the specialisation's name (which `nixos-rebuild` could then use as the default value for `--specialisation`), but I haven't been able to come up with anything working (plus it would be a breaking change then). Closes https://github.com/NixOS/nixpkgs/issues/174065
132 lines
3.4 KiB
Nix
132 lines
3.4 KiB
Nix
import ./make-test-python.nix ({ pkgs, ... }: {
|
|
name = "nixos-rebuild-specialisations";
|
|
|
|
nodes = {
|
|
machine = { lib, pkgs, ... }: {
|
|
imports = [
|
|
../modules/profiles/installation-device.nix
|
|
../modules/profiles/base.nix
|
|
];
|
|
|
|
nix.settings = {
|
|
substituters = lib.mkForce [ ];
|
|
hashed-mirrors = null;
|
|
connect-timeout = 1;
|
|
};
|
|
|
|
system.extraDependencies = with pkgs; [
|
|
curl
|
|
desktop-file-utils
|
|
docbook5
|
|
docbook_xsl_ns
|
|
grub2
|
|
kmod.dev
|
|
libarchive
|
|
libarchive.dev
|
|
libxml2.bin
|
|
libxslt.bin
|
|
python3Minimal
|
|
shared-mime-info
|
|
stdenv
|
|
sudo
|
|
xorg.lndir
|
|
];
|
|
|
|
virtualisation = {
|
|
cores = 2;
|
|
memorySize = 2048;
|
|
};
|
|
};
|
|
};
|
|
|
|
testScript =
|
|
let
|
|
configFile = pkgs.writeText "configuration.nix" ''
|
|
{ lib, pkgs, ... }: {
|
|
imports = [
|
|
./hardware-configuration.nix
|
|
<nixpkgs/nixos/modules/testing/test-instrumentation.nix>
|
|
];
|
|
|
|
boot.loader.grub = {
|
|
enable = true;
|
|
device = "/dev/vda";
|
|
forceInstall = true;
|
|
};
|
|
|
|
documentation.enable = false;
|
|
|
|
environment.systemPackages = [
|
|
(pkgs.writeShellScriptBin "parent" "")
|
|
];
|
|
|
|
specialisation.foo = {
|
|
inheritParentConfig = true;
|
|
|
|
configuration = { ... }: {
|
|
environment.systemPackages = [
|
|
(pkgs.writeShellScriptBin "foo" "")
|
|
];
|
|
};
|
|
};
|
|
|
|
specialisation.bar = {
|
|
inheritParentConfig = true;
|
|
|
|
configuration = { ... }: {
|
|
environment.systemPackages = [
|
|
(pkgs.writeShellScriptBin "bar" "")
|
|
];
|
|
};
|
|
};
|
|
}
|
|
'';
|
|
|
|
in
|
|
''
|
|
machine.start()
|
|
machine.succeed("udevadm settle")
|
|
machine.wait_for_unit("multi-user.target")
|
|
|
|
machine.succeed("nixos-generate-config")
|
|
machine.copy_from_host(
|
|
"${configFile}",
|
|
"/etc/nixos/configuration.nix",
|
|
)
|
|
|
|
with subtest("Switch to the base system"):
|
|
machine.succeed("nixos-rebuild switch")
|
|
machine.succeed("parent")
|
|
machine.fail("foo")
|
|
machine.fail("bar")
|
|
|
|
with subtest("Switch from base system into a specialization"):
|
|
machine.succeed("nixos-rebuild switch --specialisation foo")
|
|
machine.succeed("parent")
|
|
machine.succeed("foo")
|
|
machine.fail("bar")
|
|
|
|
with subtest("Switch from specialization into another specialization"):
|
|
machine.succeed("nixos-rebuild switch -c bar")
|
|
machine.succeed("parent")
|
|
machine.fail("foo")
|
|
machine.succeed("bar")
|
|
|
|
with subtest("Switch from specialization into the base system"):
|
|
machine.succeed("nixos-rebuild switch")
|
|
machine.succeed("parent")
|
|
machine.fail("foo")
|
|
machine.fail("bar")
|
|
|
|
with subtest("Switch into specialization using `nixos-rebuild test`"):
|
|
machine.succeed("nixos-rebuild test --specialisation foo")
|
|
machine.succeed("parent")
|
|
machine.succeed("foo")
|
|
machine.fail("bar")
|
|
|
|
with subtest("Make sure nonsense command combinations are forbidden"):
|
|
machine.fail("nixos-rebuild boot --specialisation foo")
|
|
machine.fail("nixos-rebuild boot -c foo")
|
|
'';
|
|
})
|