feat(nix): added nix flake into repository

.github/workflows/nix.yml

@@ -0,0 +1,35 @@
+name: Check nix packages
+on:
+  pull_request:
+    types: [opened, edited, reopened, synchronize]
+  push:
+    branches: [master]
+jobs:
+  check:
+    name: Check Nix
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check Nix flake inputs
+        uses: DeterminateSystems/flake-checker-action@v5
+        with:
+          send-statistics: false
+          fail-mode: true
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@v9
+      - name: Check repository
+        run: nix flake check
+      - name: Build packages
+        run: nix build .#${{ matrix.theme }}-grub-theme
+  build:
+    strategy:
+      matrix:
+        theme: [ acheron argenti blackswan dr.ratio hanya huohuo luocha ruanmei sparkle acheron_cn argenti_cn blackswan_cn dr.ratio_cn hanya_cn huohuo_cn luocha_cn ruanmei_cn sparkle_cn ]
+    name: Build Nix
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@v9
+      - name: Build packages
+        run: nix build .#${{ matrix.theme }}-grub-theme

.gitignore

@@ -0,0 +1,4 @@
+.envrc
+.direnv
+.vscode
+result

README.md

@@ -38,6 +38,27 @@ sudo grub-mkconfig -o /boot/grub/grub.cfg
 ```
 
 6. Reboot the computer
+
+### For NixOS users
+1. Added flake into your configuration
+```nix
+inputs.honkai-railway-grub-theme.url = "github:voidlhf/StarRailGrubThemes";
+```
+
+2. Set up theme in your configuration
+```nix
+honkai-railway-grub-theme = {
+    enable = true;
+    # Remember
+    # Theme name should have the same name as in assets/themes directory e.g. Dr.Ratio_cn is correct
+    # 'theme' field is optional. Default theme is Acheron.
+    theme = "RuanMei"; 
+};
+```
+
+3. Rebuild your system
+4. Reboot computer to see your theme :)
+
 ## Preview
 ![Acheron](/preview/Acheron.png)
 ![BlackSwan](/preview/BlackSwan.png)

default.nix

@@ -0,0 +1,27 @@
+{ stdenvNoCC
+, lib
+, fetchFromGitHub
+, theme
+}:
+
+let
+  themes = builtins.attrNames (builtins.readDir ./assets/themes);
+in
+
+assert builtins.any (x: x == theme) themes;
+
+stdenvNoCC.mkDerivation {
+  name = "StarRailGrubThemes";
+
+  src = ./.;
+
+  installPhase = "cp -r ./assets/themes/${theme} $out";
+
+  meta = with lib; {
+    homepage = "https://github.com/voidlhf/StarRailGrubThemes";
+    description = "A pack of GRUB2 themes for Honkai: Star Rail";
+    license = licenses.gpl3;
+    maintainers = with maintainers; [ Wittano ];
+    platforms = platforms.linux;
+  };
+}

flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1712791164,
+        "narHash": "sha256-3sbWO1mbpWsLepZGbWaMovSO7ndZeFqDSdX0hZ9nVyw=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "1042fd8b148a9105f3c0aca3a6177fd1d9360ba5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,36 @@
+{
+  description = "A pack of GRUB2 themes for Honkai: Star Rail";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    let
+      systems = [ "aarch64-linux" "i686-linux" "x86_64-linux" ];
+    in
+    flake-utils.lib.eachSystem systems (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+
+        themeNames = builtins.attrNames (builtins.readDir ./assets/themes);
+        themePackages = builtins.listToAttrs (builtins.map
+          (theme: {
+            name = "${pkgs.lib.strings.toLower theme}-grub-theme";
+            value = pkgs.callPackage ./default.nix { inherit theme; };
+          })
+          themeNames);
+      in
+      {
+        packages = {
+          default = pkgs.callPackage ./default.nix { theme = "Acheron"; };
+        } // themePackages;
+
+        devShells.default = pkgs.mkShell {
+          nativeBuildInputs = with pkgs; [ nixpkgs-fmt nixd ];
+        };
+
+        nixosModules.default = ./module.nix;
+      });
+}

module.nix

@@ -0,0 +1,26 @@
+{ config, pkgs, lib, ... }:
+with lib;
+let
+  cfg = config.honkai-railway-grub-theme;
+  themeNames = builtins.attrNames (builtins.readDir ./assets/themes);
+in
+{
+  options = {
+    honkai-railway-grub-theme = {
+      enable = mkEnableOption "Enable Honaki Railway GRUB2 theme";
+      theme = mkOption {
+        type = types.enum themeNames;
+        default = "Acheron";
+        example = "Dr.Ratio";
+        description = "Selected theme name. IMPORTANT! Theme name must be the same as in assert/themes directory";
+      };
+    };
+  };
+
+  config = mkIf (cfg.enable) {
+    boot.loader.grub = {
+      theme = pkgs.callPackage ./default.nix { theme = cfg.theme; };
+      splashImage = ./assets/themes/${cfg.theme}/background.png;
+    };
+  };
+}