add nixos/ly module and package update

[Vonfry]

Description of changes

Tow notes:

1. I updated ly to the unstable one due to the fixes of config reading.
2. I made a wrapper for all ly necessary files which is linked into /run/current-system/sw/ due to the line length restriction of configator used by ly.

Test method

NixOS Test

nix-build -A nixosTests.ly <your nixpkgs repo on this pr>

This is successed.

NixOS VM

An example flake is here:

{
  inputs = {
    nixpkgs.url = "github:Vonfry/nixpkgs/init-ly-module";
  };
  outputs = { self, nixpkgs }:
    let
      system = "x86_64-linux";
      pkgs = import nixpkgs { localSystem = system; };
      flakeSpecialConfig = { pkgs, ... }: {
        nix = {
          package = pkgs.nixFlakes;
          registry = {
            sys.flake = nixpkgs;
            nixpkgs.flake = nixpkgs;
            nixos.flake = nixpkgs;
          };
          channel.enable = false;
          nixPath = [ "nixos-config=${./.}" "nixpkgs=${nixpkgs}" ];
          extraOptions = ''
            flake-registry = /etc/nix/registry.json
            experimental-features = nix-command flakes
          '';
        };
      };

      nixosConfig = { ... }: {
        nixpkgs.hostPlatform = "x86_64-linux";

        users.users.alice = {
          isNormalUser = true;
          description = "Alice Foobar";
          password = "foobar";
          uid = 1000;
          extraGroups = [ "wheel" ];
        };

        i18n.defaultLocale = "en_US.UTF-8";
        time.timeZone = "Asia/Shanghai";
        console.keyMap = "dvorak-programmer";

        virtualisation.vmVariant.virtualisation.cores = 8;
        virtualisation.vmVariant.virtualisation.memorySize = 8192;
        services.xserver.enable = true;
        services.xserver.displayManager.ly.enable = true;
        services.xserver.displayManager.ly.settings = {
          load = false;
          save = false;
        };
        services.xserver.displayManager.defaultSession = "none+icewm";
        services.xserver.windowManager.icewm.enable = true;

        environment.systemPackages = with pkgs; [ vim ];
      };
      nixosOutputs = {
        nixosConfigurations.nixos-desktop = nixpkgs.lib.nixosSystem {
          modules = [
            flakeSpecialConfig
            nixosConfig
          ];
        };
      };
    in nixosOutputs // {
      devShells."${system}".default = pkgs.mkShell {
        packages = [ ];
        SHARED_DIR = "/tmp/shared";
        NIX_DISK_IMAGE = "/tmp/nixos.qcow2";
      };
    };
}

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.05 Release Notes (or backporting 23.05 and 23.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

---

Add a 👍 reaction to pull requests you find important.

[lucasew]

Please add this test to ly's passthru.tests so a bump from r-ryantm also runs this test.

[Vonfry]

I find that neither sddm and lightdm set passthru.tests, and the tests is for nixos, I don't think it should be added for the package.

[lucasew]

But that's the point of passthru.tests basically.

NixOS in this context works like a framework.

[lucasew]

Result of nixpkgs-review pr 297434 run on x86_64-linux 1

1 package blacklisted:

• nixos-install-tools

[lucasew]

Result of nixpkgs-review pr 297434 run on x86_64-linux 1

1 package blacklisted:

• nixos-install-tools

[Vonfry]

I meets a wired problem. Only parts config in /etc/ly/config.ini takes effect. According to strace, the file is read successfully. However, some configured dirs are read but some aren't (the default one is used). There is no output in stderr as well.

Edit:
I think I find the reason. ly uses configator and configator parses a line with max length 80.

[lucasew]

Result of nixpkgs-review pr 297434 run on x86_64-linux 1

2 packages blacklisted:

• nixos-install-tools
• tests.nixos-functions.nixos-test

[lucasew]

Result of nixpkgs-review pr 297434 run on x86_64-linux 1

1 package blacklisted:

• nixos-install-tools

1 package built:

• ly

[lucasew]

Result of nixpkgs-review pr 297434 run on x86_64-linux 1

2 packages blacklisted:

• nixos-install-tools
• tests.nixos-functions.nixos-test

1 package built:

• ly

[lucasew]

Expose nixosTests.ly in passthru.tests

[thiagokokada]

CC @Vonfry.

[lucasew]

Functionality wise LGTM

[Vonfry]

v1.0.1 released, rebased on master and format files.

[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/how-to-use-ly-display-manager/13753/8

[arjan-s]

https://github.com/fairyglade/ly/releases/tag/v1.0.2

Since this PR still didn't get merged... :(

[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/prs-ready-for-review/3032/4365

[lucasew]

Result of nixpkgs-review pr 297434 run on x86_64-linux 1

2 packages blacklisted:

• nixos-install-tools
• tests.nixos-functions.nixos-test

1 package built:

• ly

[lucasew]

[phanirithvij]

using it for a month with no issues