hyprland: add noctalia shell module

nixos/configuration.nix

@@ -29,6 +29,7 @@
     ./laptop.nix
     ./nix.nix
     ./notifications-tray-icon.nix
+    ./noctalia.nix
     ./nvidia.nix
     ./options.nix
     ./plasma.nix

nixos/flake.lock

@@ -1919,6 +1919,50 @@
         "type": "github"
       }
     },
+    "noctalia": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "noctalia-qs": "noctalia-qs"
+      },
+      "locked": {
+        "lastModified": 1777427472,
+        "narHash": "sha256-kqcfLdxb+CqTroMErCScvx6YQcZYJcf6X+z5I8kBJK8=",
+        "owner": "noctalia-dev",
+        "repo": "noctalia-shell",
+        "rev": "9f8dd48c8df5ab1f7f87ddf9842627e1e5682186",
+        "type": "github"
+      },
+      "original": {
+        "owner": "noctalia-dev",
+        "repo": "noctalia-shell",
+        "type": "github"
+      }
+    },
+    "noctalia-qs": {
+      "inputs": {
+        "nixpkgs": [
+          "noctalia",
+          "nixpkgs"
+        ],
+        "systems": "systems_4",
+        "treefmt-nix": "treefmt-nix"
+      },
+      "locked": {
+        "lastModified": 1777380063,
+        "narHash": "sha256-q5mWOEICcZzr+KnjIwDHV9EXiBxOC9cnBpxZbDAViU8=",
+        "owner": "noctalia-dev",
+        "repo": "noctalia-qs",
+        "rev": "8742a7a748c43bf44eb6862a8ebd3591ed71502d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "noctalia-dev",
+        "repo": "noctalia-qs",
+        "type": "github"
+      }
+    },
     "notifications-tray-icon": {
       "inputs": {
         "flake-utils": [
@@ -2184,10 +2228,11 @@
         "nixos-wsl": "nixos-wsl",
         "nixpkgs": "nixpkgs_6",
         "nixtheplanet": "nixtheplanet",
+        "noctalia": "noctalia",
         "notifications-tray-icon": "notifications-tray-icon",
         "org-agenda-api": "org-agenda-api",
         "railbird-secrets": "railbird-secrets",
-        "systems": "systems_4",
+        "systems": "systems_5",
         "vscode-server": "vscode-server",
         "xmonad": "xmonad_2",
         "xmonad-contrib": "xmonad-contrib_2"
@@ -2293,6 +2338,21 @@
       }
     },
     "systems_4": {
+      "locked": {
+        "lastModified": 1689347949,
+        "narHash": "sha256-12tWmuL2zgBgZkdoB6qXZsgJEH9LR3oUgpaQq2RbI80=",
+        "owner": "nix-systems",
+        "repo": "default-linux",
+        "rev": "31732fcf5e8fea42e59c2488ad31a0e651500f68",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default-linux",
+        "type": "github"
+      }
+    },
+    "systems_5": {
       "locked": {
         "lastModified": 1681028828,
         "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
@@ -2329,6 +2389,28 @@
         "url": "file:///home/imalison/dotfiles/dotfiles/config/taffybar/taffybar"
       }
     },
+    "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "noctalia",
+          "noctalia-qs",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1775636079,
+        "narHash": "sha256-pc20NRoMdiar8oPQceQT47UUZMBTiMdUuWrYu2obUP0=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "790751ff7fd3801feeaf96d7dc416a8d581265ba",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
+    },
     "vscode-server": {
       "inputs": {
         "flake-utils": [

nixos/flake.nix

@@ -231,6 +231,11 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
+    noctalia = {
+      url = "github:noctalia-dev/noctalia-shell";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
   };
 
   outputs = inputs @ {
@@ -443,6 +448,7 @@
         "https://colonelpanic8-dotfiles.cachix.org"
         "https://codex-cli.cachix.org"
         "https://claude-code.cachix.org"
+        "https://noctalia.cachix.org"
       ];
       extra-trusted-substituters = [
         "https://ai.cachix.org"
@@ -464,6 +470,7 @@
         "colonelpanic8-dotfiles.cachix.org-1:O6GF3nptpeMFapX29okzO92eSWXR36zqW6ZF2C8P0eQ="
         "codex-cli.cachix.org-1:1Br3H1hHoRYG22n//cGKJOk3cQXgYobUel6O8DgSing="
         "claude-code.cachix.org-1:YeXf2aNu7UTX8Vwrze0za1WEDS+4DuI2kVeWEE4fsRk="
+        "noctalia.cachix.org-1:pCOR47nnMEo5thcxNDtzWpOxNFQsBRglJzxWPp3dkU4="
       ];
     };
     nixosConfigurations =

nixos/hyprland.nix

@@ -34,6 +34,7 @@ let
     runtimeInputs = [
       pkgs.rofi
       hyprRofiWindow
+      inputs.noctalia.packages.${system}.default
     ];
     text = ''
       exec ${../dotfiles/lib/bin/hypr_shell_ui} "$@"
@@ -94,7 +95,10 @@ let
     };
   };
   enabledModule = makeEnable config "myModules.hyprland" true {
-    myModules.taffybar.enable = true;
+    # Install both shell service units so `desktop_shell_ui set ...` can switch
+    # between them at runtime without a NixOS rebuild.
+    myModules.noctalia.enable = lib.mkDefault true;
+    myModules.taffybar.enable = lib.mkDefault true;
 
     # Needed for hyprlock authentication without PAM fallback warnings.
     security.pam.services.hyprlock = { };

nixos/noctalia.nix

@@ -0,0 +1,87 @@
+{
+  config,
+  inputs,
+  lib,
+  makeEnable,
+  pkgs,
+  ...
+}:
+let
+  system = pkgs.stdenv.hostPlatform.system;
+  noctaliaPackage = inputs.noctalia.packages.${system}.default;
+  waitForWayland = pkgs.writeShellScript "noctalia-wait-for-wayland" ''
+    runtime_dir="''${XDG_RUNTIME_DIR:-/run/user/$(${pkgs.coreutils}/bin/id -u)}"
+
+    for _ in $(${pkgs.coreutils}/bin/seq 1 50); do
+      if [ -n "''${WAYLAND_DISPLAY:-}" ] && [ -S "$runtime_dir/$WAYLAND_DISPLAY" ]; then
+        exit 0
+      fi
+      ${pkgs.coreutils}/bin/sleep 0.1
+    done
+
+    echo "Wayland socket not ready: WAYLAND_DISPLAY=''${WAYLAND_DISPLAY:-<unset>} XDG_RUNTIME_DIR=$runtime_dir" >&2
+    exit 1
+  '';
+in
+makeEnable config "myModules.noctalia" false {
+  environment.systemPackages = [
+    noctaliaPackage
+  ];
+
+  # Noctalia's battery widget talks to UPower. Hosts that deliberately do not
+  # have batteries can still override this back to false.
+  services.upower.enable = lib.mkDefault true;
+
+  home-manager.sharedModules = [
+    inputs.noctalia.homeModules.default
+    ({ lib, ... }: {
+      programs.noctalia-shell = {
+        enable = true;
+        # This module provides the Hyprland-scoped service below.
+        systemd.enable = false;
+      };
+
+      home.activation.noctaliaLauncherOverviewLayer =
+        lib.hm.dag.entryAfter [ "writeBoundary" ] ''
+          settings_file="$HOME/.config/noctalia/settings.json"
+          settings_tmp="$(${pkgs.coreutils}/bin/mktemp)"
+
+          ${pkgs.coreutils}/bin/mkdir -p "$(${pkgs.coreutils}/bin/dirname "$settings_file")"
+
+          if [ -e "$settings_file" ] && ${lib.getExe pkgs.jq} -e . "$settings_file" >/dev/null 2>&1; then
+            ${lib.getExe pkgs.jq} \
+              '.appLauncher = (.appLauncher // {}) | .appLauncher.overviewLayer = true' \
+              "$settings_file" > "$settings_tmp"
+            ${pkgs.coreutils}/bin/mv "$settings_tmp" "$settings_file"
+          else
+            ${pkgs.coreutils}/bin/printf '%s\n' \
+              '{' \
+              '  "appLauncher": {' \
+              '    "overviewLayer": true' \
+              '  }' \
+              '}' > "$settings_file"
+            ${pkgs.coreutils}/bin/rm -f "$settings_tmp"
+          fi
+        '';
+
+      systemd.user.services.noctalia-shell = {
+        Unit = {
+          Description = "Noctalia Shell";
+          Documentation = "https://docs.noctalia.dev";
+          PartOf = [ "hyprland-session.target" ];
+          After = [ "hyprland-session.target" ];
+        };
+
+        Service = {
+          ExecCondition = "/run/current-system/sw/bin/desktop_shell_ui exec-condition noctalia";
+          ExecStartPre = "${waitForWayland}";
+          ExecStart = "${lib.getExe noctaliaPackage} --no-duplicate";
+          Restart = "on-failure";
+          RestartSec = 1;
+        };
+
+        Install.WantedBy = [ "hyprland-session.target" ];
+      };
+    })
+  ];
+}