initial commit

nix/deps.nix

@@ -0,0 +1,20 @@
+# generated by zon2nix (https://github.com/nix-community/zon2nix)
+
+{ linkFarm, fetchzip, fetchgit }:
+
+linkFarm "zig-packages" [
+  {
+    name = "wayland-0.6.0-lQa1kqz8AQADQmdNJsNhLoNHcnEGEUjrOaPV-dtEnEmX";
+    path = fetchzip {
+      url = "https://codeberg.org/ifreund/zig-wayland/archive/v0.6.0.tar.gz";
+      hash = "sha256-3m/ITNhZUJ/5uD/Tqm+0uZSktGoYgWF5oldOqOCUkIE=";
+    };
+  }
+  {
+    name = "xkbcommon-0.4.0-VDqIe0i2AgDRsok2GpMFYJ8SVhQS10_PI2M_CnHXsJJZ";
+    path = fetchzip {
+      url = "https://codeberg.org/ifreund/zig-xkbcommon/archive/v0.4.0.tar.gz";
+      hash = "sha256-zQkmP/cuhAtjOLqYS5D15khKzpqyhbyZ0TD6/8jOkqE=";
+    };
+  }
+]

nix/hm-module.nix

@@ -0,0 +1,77 @@
+self:
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  cfg = config.programs.att_wm;
+in
+{
+  options.programs.att_wm = {
+    enable = lib.mkEnableOption "att_wm, a dwm-like window manager for river";
+
+    package = lib.mkOption {
+      type = lib.types.package;
+      default = self.packages.${pkgs.stdenv.hostPlatform.system}.att_wm;
+      defaultText = lib.literalMD "the flake's `att_wm` package";
+      description = "The att_wm package to use.";
+    };
+
+    settings = lib.mkOption {
+      type = lib.types.nullOr lib.types.path;
+      default = null;
+      example = lib.literalExpression "./config.zig";
+      description = ''
+        A replacement for att_wm's `src/config.zig`. att_wm is configured at
+        compile time in the manner of dwm, so setting this rebuilds it.
+      '';
+    };
+
+    autostart = lib.mkOption {
+      type = lib.types.listOf lib.types.str;
+      default = [ ];
+      example = [ "quickshell" ];
+      description = ''
+        Commands appended to river's init script, run once the session starts.
+        att_wm itself is always started last and kept in the foreground.
+      '';
+    };
+
+    riverPackage = lib.mkOption {
+      type = lib.types.package;
+      default = pkgs.river;
+      description = "The river package the init script is written for.";
+    };
+  };
+
+  config = lib.mkIf cfg.enable (
+    let
+      att_wm =
+        if cfg.settings == null then
+          cfg.package
+        else
+          cfg.package.override { configFile = cfg.settings; };
+    in
+    {
+      home.packages = [
+        att_wm
+        cfg.riverPackage
+      ];
+
+      # river runs this executable on startup and expects the window manager to
+      # connect; keeping att_wm in the foreground ties the session's lifetime to
+      # it, so quitting att_wm ends the session cleanly.
+      xdg.configFile."river/init" = {
+        executable = true;
+        text = ''
+          #!${pkgs.runtimeShell}
+          ${lib.concatMapStringsSep "\n" (c: "${c} &") cfg.autostart}
+          exec ${lib.getExe att_wm}
+        '';
+      };
+    }
+  );
+}

nix/package.nix

@@ -0,0 +1,73 @@
+{
+  lib,
+  self,
+  stdenv,
+  callPackage,
+  zig,
+  pkg-config,
+  wayland,
+  wayland-protocols,
+  wayland-scanner,
+  libxkbcommon,
+  # Path to a replacement src/config.zig. dwm-style compile-time configuration:
+  #   att_wm.override { configFile = ./my-config.zig; }
+  # Deliberately not called `config`: callPackage would fill that from the
+  # nixpkgs config set.
+  configFile ? null,
+}:
+
+let
+  deps = callPackage ./deps.nix { };
+in
+stdenv.mkDerivation {
+  pname = "att_wm";
+  version = "0.1.0";
+
+  src = lib.cleanSource self;
+
+  strictDeps = true;
+
+  nativeBuildInputs = [
+    zig
+    pkg-config
+    wayland-scanner
+  ];
+
+  buildInputs = [
+    wayland
+    wayland-protocols
+    wayland-scanner
+    libxkbcommon
+  ];
+
+  zigBuildFlags = [
+    "--system"
+    "${deps}"
+    "-Dpie"
+  ]
+  ++ lib.optional (configFile != null) "-Dconfig=${configFile}";
+
+  doCheck = true;
+
+  # The check phase gets its own flag list, so it needs --system too; without
+  # it `zig build test` tries to fetch the dependencies over the network and
+  # fails in the sandbox.
+  zigCheckFlags = [
+    "--system"
+    "${deps}"
+  ];
+
+  meta = {
+    description = "A dwm-like window manager for the river Wayland compositor";
+    longDescription = ''
+      att_wm implements river-window-management-v1, providing dwm's window
+      management model — tags, a master/stack layout, monocle and tabbed
+      layouts — on top of river 0.4's non-monolithic compositor. Tag and window
+      state is published over a JSON-lines unix socket for bars such as
+      quickshell, and driven back the other way with the att_wmctl CLI.
+    '';
+    license = lib.licenses.gpl3Only;
+    platforms = lib.platforms.linux;
+    mainProgram = "att_wm";
+  };
+}