From 621603d0dad2438aab7cb0bd37e5cbedb4b0efdf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Leonardo=20Eug=C3=AAnio?= <lelgenio@disroot.org>
Date: Sat, 20 Jun 2026 02:46:58 -0300
Subject: [PATCH] sway: allow setting both internal and external monitors

---
 pkgs/default.nix         |  4 +++
 pkgs/lumactl.nix         | 54 ++++++++++++++++++++++++++++++++++++++++
 pkgs/wmctl.nix           | 43 ++++++++++++++++++++++++++++++++
 system/greetd.nix        |  3 +++
 system/users.nix         |  1 +
 user/sway/default.nix    |  3 ++-
 user/sway/sway-binds.nix |  4 +--
 7 files changed, 109 insertions(+), 3 deletions(-)
 create mode 100644 pkgs/lumactl.nix
 create mode 100644 pkgs/wmctl.nix

diff --git a/pkgs/default.nix b/pkgs/default.nix
index f33aa3f..415e419 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -5,6 +5,10 @@
 rec {
   caffeinated = pkgs.callPackage ./caffeinated { };
   cargo-checkmate = pkgs.callPackage ./cargo-checkmate.nix { };
+  lumactl = pkgs.callPackage ./lumactl.nix {
+    wmctl = pkgs.callPackage ./wmctl.nix { };
+  };
+  wmctl = pkgs.callPackage ./wmctl.nix { };
   lipsum = pkgs.callPackage ./lipsum.nix { };
   emmet-cli = pkgs.callPackage ./emmet-cli.nix { };
   material-wifi-icons = pkgs.callPackage ./material-wifi-icons.nix { };
diff --git a/pkgs/lumactl.nix b/pkgs/lumactl.nix
new file mode 100644
index 0000000..cbf2f71
--- /dev/null
+++ b/pkgs/lumactl.nix
@@ -0,0 +1,54 @@
+{
+  lib,
+  rustPlatform,
+  fetchFromGitHub,
+  pkg-config,
+  systemd,
+  libxkbcommon,
+  wayland,
+  wayland-scanner,
+  libffi,
+  wmctl,
+  makeWrapper,
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "lumactl";
+  version = "0.1.0";
+
+  src = fetchFromGitHub {
+    owner = "danyspin97";
+    repo = pname;
+    rev = "89e273e25afe545e3bcaf282b84a63e3c34117de";
+    hash = "sha256-PQucBe3xPjjzuiaukdf2f/CvTqbGm0wJMbdpgd2ubnU=";
+  };
+
+  cargoHash = "sha256-RvC8wDCY22dBrUcl6VjrwMHwTTSSoBzLwnghAOAUoYU=";
+
+  nativeBuildInputs = [
+    pkg-config
+    wayland-scanner
+    makeWrapper
+  ];
+  buildInputs = [
+    systemd
+    libxkbcommon
+    wayland
+    libffi
+    wmctl
+  ];
+
+  postFixup = ''
+    wrapProgram $out/bin/lumactl \
+      --prefix PATH : ${lib.makeBinPath [ wmctl ]}
+  '';
+
+  meta = with lib; {
+    description = "CLI utility for controlling display brightness on Linux";
+    homepage = "https://github.com/danyspin97/lumactl";
+    license = licenses.gpl3Plus;
+    mainProgram = "lumactl";
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ lelgenio ];
+  };
+}
diff --git a/pkgs/wmctl.nix b/pkgs/wmctl.nix
new file mode 100644
index 0000000..7be8e92
--- /dev/null
+++ b/pkgs/wmctl.nix
@@ -0,0 +1,43 @@
+{
+  lib,
+  rustPlatform,
+  fetchFromGitHub,
+  pkg-config,
+  libxkbcommon,
+  wayland,
+  wayland-scanner,
+  libffi,
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "wmctl";
+  version = "0.1.0";
+
+  src = fetchFromGitHub {
+    owner = "danyspin97";
+    repo = pname;
+    rev = "398d87945ab6c4b31e04063098c79d1e456afdcc";
+    hash = "sha256-J3ZHq51uDgPMcQbJzEflReDnm1AqPs7Hov3jpCDlNHU=";
+  };
+
+  cargoHash = "sha256-T7FdevuBLbrYE5vTuBincSRMDOLkUsoKx/jg0i1Ybdo=";
+
+  nativeBuildInputs = [
+    pkg-config
+    wayland-scanner
+  ];
+  buildInputs = [
+    libxkbcommon
+    wayland
+    libffi
+  ];
+
+  meta = with lib; {
+    description = "CLI for controlling Wayland compositors";
+    homepage = "https://github.com/danyspin97/wmctl";
+    license = licenses.gpl3Plus;
+    mainProgram = "wmctl";
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ lelgenio ];
+  };
+}
diff --git a/system/greetd.nix b/system/greetd.nix
index 8642968..606d518 100644
--- a/system/greetd.nix
+++ b/system/greetd.nix
@@ -25,6 +25,9 @@ in
     # Enable the X11 windowing system.
     services.xserver.enable = false;
 
+    # Enable external monitor configuration (brightness)
+    hardware.i2c.enable = true;
+
     # enable sway window manager
     programs.sway = {
       enable = true;
diff --git a/system/users.nix b/system/users.nix
index c1a1039..1e3c93c 100644
--- a/system/users.nix
+++ b/system/users.nix
@@ -22,6 +22,7 @@
       "input"
       "libvirtd"
       "kvm"
+      "i2c"
     ];
     shell = pkgs.fish;
     openssh.authorizedKeys.keys = [
diff --git a/user/sway/default.nix b/user/sway/default.nix
index 9a0c791..2921be5 100644
--- a/user/sway/default.nix
+++ b/user/sway/default.nix
@@ -155,7 +155,8 @@ in
       wdmenu
       wlauncher
       volumesh
-      brightnessctl
+      wmctl
+      lumactl
       showkeys
       pamixer
       libnotify
diff --git a/user/sway/sway-binds.nix b/user/sway/sway-binds.nix
index a68a31b..925e346 100644
--- a/user/sway/sway-binds.nix
+++ b/user/sway/sway-binds.nix
@@ -160,8 +160,8 @@ let
   };
 
   screen_binds = {
-    "XF86MonBrightnessDown" = "exec brightnessctl --min-value=1 set 5%-";
-    "XF86MonBrightnessUp" = "exec brightnessctl --min-value=1 set 5%+";
+    "XF86MonBrightnessDown" = "exec lumactl set -- -5%";
+    "XF86MonBrightnessUp" = "exec lumactl set -- +5%";
     "${mod}+l" = "exec ${lib.getExe _lock}";
   };