Nix & CI: init

.github/workflows/nix.yml

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+name: Build
+
+on: [push, pull_request, workflow_dispatch]
+jobs:
+  nix:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+
+    - uses: DeterminateSystems/nix-installer-action@main
+    - uses: DeterminateSystems/magic-nix-cache-action@main
+
+    # not needed (yet)
+    # - uses: cachix/cachix-action@v12
+    #   with:
+    #     name: hyprland
+    #     authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+
+    - name: Build
+      run: nix flake check --print-build-logs --keep-going
+

flake.nix

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+{
+  description = "Hyprland's GPU-accelerated screen locking utility";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+
+    hyprlang = {
+      url = "github:hyprwm/hyprlang";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = inputs: let
+    inherit (inputs.nixpkgs) lib;
+    genSystems = lib.genAttrs [
+      # Add more systems if they are supported
+      "x86_64-linux"
+      "aarch64-linux"
+    ];
+    pkgsFor = genSystems (system:
+      import inputs.nixpkgs {
+        overlays = [inputs.self.overlays.default];
+        inherit system;
+      });
+  in {
+    overlays = import ./nix/overlays.nix {inherit inputs lib;};
+
+    packages = genSystems (system: {
+      inherit (pkgsFor.${system}) hyprlock;
+      default = inputs.self.packages.${system}.hyprlock;
+    });
+
+    homeManagerModules = {
+      hyprlock = import ./nix/hm-module.nix inputs.self;
+      default = inputs.self.homeManagerModules.hyprlock;
+    };
+
+    checks = genSystems (system: inputs.self.packages.${system});
+
+    formatter = genSystems (system: pkgsFor.${system}.alejandra);
+  };
+}

nix/default.nix

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+{
+  lib,
+  stdenv,
+  cmake,
+  pkg-config,
+  cairo,
+  libGL,
+  libxkbcommon,
+  hyprlang,
+  pam,
+  pango,
+  wayland,
+  wayland-protocols,
+  version ? "git",
+}:
+stdenv.mkDerivation {
+  pname = "hyprlock";
+  inherit version;
+  src = ../.;
+
+  nativeBuildInputs = [
+    cmake
+    pkg-config
+  ];
+
+  buildInputs = [
+    cairo
+    libGL
+    libxkbcommon
+    hyprlang
+    pam
+    pango
+    wayland
+    wayland-protocols
+  ];
+
+  meta = {
+    homepage = "https://github.com/hyprwm/hyprlock";
+    description = "A gpu-accelerated screen lock for Hyprland";
+    license = lib.licenses.bsd3;
+    platforms = lib.platforms.linux;
+    mainProgram = "hyprlock";
+  };
+}

nix/hm-module.nix

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+self: {
+  config,
+  pkgs,
+  lib,
+  ...
+}: let
+  inherit (builtins) toString;
+  inherit (lib.types) int listOf package str submodule;
+  inherit (lib.modules) mkIf;
+  inherit (lib.options) mkOption mkEnableOption;
+
+  cfg = config.services.hyprlock;
+in {
+  options.services.hyprlock = {
+    enable = mkEnableOption "Hyprlock, Hyprland's GPU-accelerated lock screen utility";
+
+    package = mkOption {
+      description = "The hyprlock package";
+      type = package;
+      default = self.packages.${pkgs.stdenv.hostPlatform.system}.hyprlock;
+    };
+
+    backgrounds = mkOption {
+      description = "Monitor configurations";
+      type = listOf (submodule {
+        options = {
+          monitor = mkOption {
+            description = "The monitor to apply the given wallpaper to";
+            type = str;
+            default = "";
+          };
+
+          path = mkOption {
+            description = "The path to the wallpaper";
+            type = str;
+            default = "echo 'timeout reached'";
+          };
+        };
+      });
+    };
+
+    general.disable_loading_bar =
+      mkEnableOption ""
+      // {
+        description = "Whether to disable loading bar";
+      };
+
+    input_field = submodule {
+      options = {
+        monitor = mkOption {
+          description = "The monitor to place the input field on";
+          type = str;
+          default = "";
+        };
+
+        size = mkOption {
+          description = "The size of the input field";
+          type = submodule {
+            options = {
+              width = mkOption {
+                description = "Width of the input field";
+                type = int;
+                default = 200;
+              };
+              height = mkOption {
+                description = "Height of the input field";
+                type = int;
+                default = 50;
+              };
+            };
+          };
+        };
+
+        outline_thickness = mkOption {
+          description = "The outline thickness of the input field";
+          type = int;
+          default = 3;
+        };
+
+        outer_color = mkOption {
+          description = "The outer color of the input field";
+          type = str;
+          default = "rgb(151515)";
+        };
+
+        inner_color = mkOption {
+          description = "The inner color of the input field";
+          type = str;
+          default = "rgb(200, 200, 200)";
+        };
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    xdg.configFile."hypr/hyprlock.conf".text = ''
+      general {
+        disable_loading_bar = ${cfg.general.disable_loading_bar}
+      }
+
+      input_field {
+        monitor = ${cfg.input_field.monitor}
+        size = ${toString cfg.input_field.size.width} ${toString cfg.input_field.size.height}
+        outline_thickness = ${toString cfg.input_field.outline_thickness}
+        outer_color = ${cfg.input_field.outer_color}
+        inner_color = ${cfg.input_field.inner_color}
+      }
+
+      ${builtins.concatStringsSep "\n" (map (background: ''
+          background {
+            monitor = ${background.monitor}
+            path = ${background.path}
+          }
+        '')
+        cfg.backgrounds)}
+    '';
+  };
+}

nix/overlays.nix

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+{
+  lib,
+  inputs,
+}: let
+  mkDate = longDate: (lib.concatStringsSep "-" [
+    (builtins.substring 0 4 longDate)
+    (builtins.substring 4 2 longDate)
+    (builtins.substring 6 2 longDate)
+  ]);
+in {
+  default = lib.composeManyExtensions [
+    inputs.hyprlang.overlays.default
+    (final: prev: {
+      hyprlock = prev.callPackage ./default.nix {
+        stdenv = prev.gcc13Stdenv;
+        version = "0.pre" + "+date=" + (mkDate (inputs.self.lastModifiedDate or "19700101")) + "_" + (inputs.self.shortRev or "dirty");
+        inherit (final) hyprlang;
+      };
+    })
+  ];
+}