From e77dec2d942eb3cb622a5519f1f1810bd9b7c634 Mon Sep 17 00:00:00 2001
From: "RingOfStorms (Joshua Bell)" <ringofstorms@gmail.com>
Date: Fri, 19 Sep 2025 17:11:15 -0500
Subject: [PATCH] i3 draft

---
 common/desktop_environment/i3/default.nix     |  64 +++++++++
 .../i3/home_manager/i3.nix                    | 121 ++++++++++++++++++
 .../i3/home_manager/polybar.nix               |  27 ++++
 common/desktop_environment/i3/polybar/config  |  51 ++++++++
 .../desktop_environment/i3/polybar/launch.sh  |   6 +
 hosts/lio/i3_customizations.nix               |  50 ++++++++
 6 files changed, 319 insertions(+)
 create mode 100644 common/desktop_environment/i3/default.nix
 create mode 100644 common/desktop_environment/i3/home_manager/i3.nix
 create mode 100644 common/desktop_environment/i3/home_manager/polybar.nix
 create mode 100644 common/desktop_environment/i3/polybar/config
 create mode 100644 common/desktop_environment/i3/polybar/launch.sh
 create mode 100644 hosts/lio/i3_customizations.nix

diff --git a/common/desktop_environment/i3/default.nix b/common/desktop_environment/i3/default.nix
new file mode 100644
index 0000000..0644a40
--- /dev/null
+++ b/common/desktop_environment/i3/default.nix
@@ -0,0 +1,64 @@
+{ config, lib, pkgs, ... }:
+let
+  ccfg = import ../../config.nix;
+  cfg_path = [
+    ccfg.custom_config_key
+    "desktopEnvironment"
+    "i3"
+  ];
+  cfg = lib.attrsets.getAttrFromPath cfg_path config;
+in
+with lib;
+{
+  options = {
+    enable = lib.mkEnableOption "i3 (X11) desktop environment";
+    terminalCommand = mkOption {
+      type = lib.types.str;
+      default = "foot";
+      description = "The terminal command to use.";
+    };
+    extraOptions = mkOption {
+      type = lib.types.attrs;
+      default = { };
+      description = "Extra options for i3 configuration.";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    home-manager = {
+      sharedModules = [ ./home_manager ];
+    };
+
+    services.greetd = {
+      enable = true;
+      vt = 2;
+      settings = {
+        default_session = {
+          command = "${pkgs.greetd.tuigreet}/bin/tuigreet --time --remember --remember-session --cmd '${pkgs.dbus}/bin/dbus-run-session ${pkgs.xorg.xinit}/bin/xinit ${pkgs.i3}/bin/i3'}";
+          user = "greeter";
+        };
+      };
+    };
+
+    # X server
+    services.xserver.enable = true;
+    services.xserver.displayManager = {
+      # kept undefined to allow user selection; greetd is enabled above
+    };
+
+    # Environment variables for X11
+    environment.sessionVariables = {
+      XDG_SESSION_TYPE = "x11";
+      XDG_CURRENT_DESKTOP = "i3";
+      XDG_SESSION_DESKTOP = "i3";
+    };
+
+    environment.systemPackages = with pkgs; [ i3 i3status i3lock i3-gaps polybar maim xclip xterm ];
+
+    # Enable backlight/brightness control, audio, etc., similar to sway defaults
+    environment.systemPackages = lib.mkForce (with pkgs; [ polybar maim xclip i3 i3status i3lock i3-gaps pavucontrol btop nemo feh rofi ]);
+
+    # Allow users to add extra options into the generated i3 config
+    # extraOptions can be appended by home-manager fragment
+  };
+}
diff --git a/common/desktop_environment/i3/home_manager/i3.nix b/common/desktop_environment/i3/home_manager/i3.nix
new file mode 100644
index 0000000..c23da74
--- /dev/null
+++ b/common/desktop_environment/i3/home_manager/i3.nix
@@ -0,0 +1,121 @@
+{ config, lib, pkgs, ... }:
+let
+  ccfg = import ../../config.nix;
+  cfg_path = [
+    ccfg.custom_config_key
+    "desktopEnvironment"
+    "i3"
+  ];
+  cfg = lib.attrsets.getAttrFromPath cfg_path config;
+in
+{
+  config = lib.mkIf cfg.enable {
+    programs.i3 = {
+      enable = true;
+      package = pkgs.i3; # i3 window manager
+      windowManager.command = "i3";
+      extraConfig = lib.mkForce (''
+# Generated from sway configuration
+set $mod Mod4
+set $term ${cfg.terminalCommand}
+set $menu rofi -show drun
+
+# Input
+# Caps lock as escape is handled system-wide in NixOS
+
+# Focus
+bindsym $mod+h focus left
+bindsym $mod+l focus right
+bindsym $mod+k focus up
+bindsym $mod+j focus down
+
+# Apps
+bindsym $mod+Return exec $term
+bindsym $mod+space exec ${cfg.menu}
+bindsym $mod+q kill
+bindsym $mod+Shift+Escape exit
+bindsym $mod+Shift+q exec i3lock
+bindsym $mod+f floating toggle
+
+# Workspaces
+set $ws1 "1: "
+set $ws2 "2: "
+set $ws3 "3: "
+set $ws4 "4: "
+set $ws5 "5: "
+set $ws6 "6"
+set $ws7 "7"
+set $ws8 "8"
+set $ws9 "9"
+set $ws10 "10"
+
+bindsym $mod+1 workspace $ws1
+bindsym $mod+n workspace $ws1
+bindsym $mod+2 workspace $ws2
+bindsym $mod+m workspace $ws2
+bindsym $mod+3 workspace $ws3
+bindsym $mod+comma workspace $ws3
+bindsym $mod+4 workspace $ws4
+bindsym $mod+period workspace $ws4
+bindsym $mod+5 workspace $ws5
+bindsym $mod+slash workspace $ws5
+bindsym $mod+6 workspace $ws6
+bindsym $mod+7 workspace $ws7
+bindsym $mod+8 workspace $ws8
+bindsym $mod+9 workspace $ws9
+bindsym $mod+0 workspace $ws10
+
+# Move windows
+bindsym $mod+Shift+h move left
+bindsym $mod+Shift+l move right
+bindsym $mod+Shift+k move up
+bindsym $mod+Shift+j move down
+bindsym $mod+Shift+1 move container to workspace $ws1
+bindsym $mod+Shift+n move container to workspace $ws1
+bindsym $mod+Shift+2 move container to workspace $ws2
+bindsym $mod+Shift+m move container to workspace $ws2
+bindsym $mod+Shift+3 move container to workspace $ws3
+bindsym $mod+Shift+comma move container to workspace $ws3
+bindsym $mod+Shift+4 move container to workspace $ws4
+bindsym $mod+Shift+period move container to workspace $ws4
+bindsym $mod+Shift+5 move container to workspace $ws5
+bindsym $mod+Shift+slash move container to workspace $ws5
+bindsym $mod+Shift+6 move container to workspace $ws6
+bindsym $mod+Shift+7 move container to workspace $ws7
+bindsym $mod+Shift+8 move container to workspace $ws8
+bindsym $mod+Shift+9 move container to workspace $ws9
+bindsym $mod+Shift+0 move container to workspace $ws10
+
+# Mouse
+floating_modifier $mod
+
+# Screenshot (uses grim/slurp on Wayland; on X11 use maim)
+bindsym Print exec --no-startup-id maim -s | xclip -selection clipboard -t image/png
+
+# Startup
+exec --no-startup-id ${pkgs.bash}/bin/sh -c '~/.config/polybar/launch.sh'
+
+# gaps, borders handled by i3-gaps if available
+include ~/.config/i3/custom.conf
+'') ;
+    };
+
+    home.file = {
+      ".config/i3/config" = {
+        text = builtins.toString (config.programs.i3.extraConfig);
+      };
+      ".config/i3/custom.conf" = {
+        text = let
+          extra = cfg.extraOptions or {};
+          mkWorkspaceAssign = ws: out: "workspace \"${ws}\" output ${out}\n";
+          wsAssigns = if extra.workspaceOutputAssign == null then "" else
+            lib.concatStringsSep "" (lib.map (v: mkWorkspaceAssign v.workspace v.output) extra.workspaceOutputAssign);
+          startupLines = if extra.startup == null then "" else
+            lib.concatStringsSep "" (lib.map (s: "exec --no-startup-id ${s.command}\n") extra.startup);
+        in wsAssigns + startupLines;
+      };
+    };
+
+    environment.systemPackages = with pkgs; [ i3 i3status polybar maim xclip i3lock i3-gaps ];
+  };
+}
diff --git a/common/desktop_environment/i3/home_manager/polybar.nix b/common/desktop_environment/i3/home_manager/polybar.nix
new file mode 100644
index 0000000..f9ad455
--- /dev/null
+++ b/common/desktop_environment/i3/home_manager/polybar.nix
@@ -0,0 +1,27 @@
+{ config, lib, pkgs, ... }:
+let
+  ccfg = import ../../config.nix;
+  cfg_path = [
+    ccfg.custom_config_key
+    "desktopEnvironment"
+    "i3"
+    "polybar"
+  ];
+  cfg = lib.attrsets.getAttrFromPath cfg_path config;
+in
+{
+  config = lib.mkIf cfg.enable {
+    home.file = {
+      ".config/polybar/config" = {
+        text = builtins.readFile ../polybar/config;
+      };
+      ".config/polybar/launch.sh" = {
+        text = builtins.readFile ../polybar/launch.sh;
+        executable = true;
+      };
+    };
+
+    home.packages = [ pkgs.polybar ];
+    services.xserver.windowManager.i3.enable = true;
+  };
+}
diff --git a/common/desktop_environment/i3/polybar/config b/common/desktop_environment/i3/polybar/config
new file mode 100644
index 0000000..3145c9c
--- /dev/null
+++ b/common/desktop_environment/i3/polybar/config
@@ -0,0 +1,51 @@
+[bar/top]
+width = 100%
+height = 28
+background = #1a1b26
+foreground = #c0caf5
+modules-left = workspace
+modules-center = date cpu memory
+modules-right = pulseaudio battery network
+
+environment = {
+    TERM = xterm-256color
+}
+
+[module/workspace]
+type = internal/xworkspaces
+pin-workspaces = true
+wrap-scroll = false
+; icons for numbers
+format-underline = #7dcae4
+label = %name%
+label-foreground = #c0caf5
+
+[module/date]
+type = internal/date
+interval = 5
+format = %b %d, %H:%M
+
+[module/cpu]
+type = internal/cpu
+format = 󰻠 %percentage:2.0%%
+
+[module/memory]
+type = internal/memory
+format = 󰍛 %used_percent%%
+
+[module/pulseaudio]
+type = internal/pulseaudio
+format = {volume}%
+
+[module/battery]
+type = internal/battery
+battery = BAT0
+adapter = AC
+format-charging = %percentage%%
+format-discharging = %percentage%%
+
+[module/network]
+type = internal/network
+interface = auto
+format-connected = 󰤨 %essid% (%signal_strength%%)
+format-disconnected = 󰖪 Disconnected
diff --git a/common/desktop_environment/i3/polybar/launch.sh b/common/desktop_environment/i3/polybar/launch.sh
new file mode 100644
index 0000000..b394ebb
--- /dev/null
+++ b/common/desktop_environment/i3/polybar/launch.sh
@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+# Launch polybar on each connected monitor
+MONITORS=$(xrandr --query | grep " connected" | cut -d' ' -f1)
+for m in $MONITORS; do
+  MONITOR=$m polybar --reload top &
+done
diff --git a/hosts/lio/i3_customizations.nix b/hosts/lio/i3_customizations.nix
new file mode 100644
index 0000000..b82cbc8
--- /dev/null
+++ b/hosts/lio/i3_customizations.nix
@@ -0,0 +1,50 @@
+{ ... }:
+let
+  i3ExtraOptions = {
+    startup = [
+      {
+        command = "exec sh -c 'sleep 0.01; i3-msg workspace 7; sleep 0.02; i3-msg workspace 1'";
+      }
+    ];
+
+    # Example: map workspaces 1–6 to DP-1 and 7–10 to DP-2
+    workspaceOutputAssign = [
+      { workspace = "1"; output = "DP-1"; }
+      { workspace = "2"; output = "DP-1"; }
+      { workspace = "3"; output = "DP-1"; }
+      { workspace = "4"; output = "DP-1"; }
+      { workspace = "5"; output = "DP-1"; }
+      { workspace = "6"; output = "DP-1"; }
+      { workspace = "7"; output = "DP-2"; }
+      { workspace = "8"; output = "DP-2"; }
+      { workspace = "9"; output = "DP-2"; }
+      { workspace = "10"; output = "DP-2"; }
+    ];
+
+    # Optional output settings
+    output = {
+      "DP-1" = {
+        scale = "1";
+        pos = "0 0";
+        mode = "3840x2160@97.983Hz";
+        bg = "${./wallpapers/pixel_neon.png} fill";
+      };
+      "DP-2" = {
+        scale = "1";
+        transform = "270";
+        pos = "-1440 -640";
+        mode = "3440x1440@99.982Hz";
+        bg = "${./wallpapers/pixel_neon_v.png} fill";
+      };
+    };
+  };
+in
+{
+  options = { };
+
+  config = {
+    environment.systemPackages = [ ];
+
+    ringofstorms_common.desktopEnvironment.i3.extraOptions = i3ExtraOptions;
+  };
+}