Separated concerns in desktop environment

modules/desktop/desktop.nix

@@ -16,6 +16,9 @@ in
       type = types.bool;
       default = false;
     };
+
+    bgColour = my.mkOpt' types.str "#808F85" "Background colour for the wallpaper";
+    wallpapers = my.mkOpt' types.path ../../data/wallpapers/flors "Path to a folder containing wallpapers";
   };
 
   config = mkIf cfg.enable {
@@ -50,19 +53,22 @@ in
 
     samfelag.modules = {
 
-      # Basic
       app.alacritty.enable = true;
-      desktop.polybar.enable = true;
       desktop.rofi.enable = true;
+      desktop.polybar.enable = true;
+      app.firefox.enable = true;
 
       desktop.i3 = {
         enable = true;
         laptop = cfg.laptop;
-        launcher.command = "${pkgs.rofi}/bin/rofi rofi -show run";
-        terminal.command = "${pkgs.alacritty}/bin/alacritty";
-        browser.command = "${pkgs.firefox}/bin/firefox";
-        locker.command = "${pkgs.i3lock-blur}/bin/i3lock-color -c 808F85 && sleep 1";
-      app.firefox.enable = true;
+        launcher = "${pkgs.rofi}/bin/rofi rofi -show run";
+        terminal = "${pkgs.alacritty}/bin/alacritty";
+        locker = "${pkgs.i3lock-blur}/bin/i3lock-color -c 808F85 && sleep 1";
+
+        extraStartup = [
+          { command = "systemctl --user restart polybar"; always = true; notification = false; }
+          { command = "feh --bg-center -B \"${cfg.bgColour}\" -z --no-fehbg ${cfg.wallpapers}"; always = true; notification = false; }
+        ];
       };
     };
 

modules/desktop/i3.nix

@@ -4,50 +4,24 @@ let
   cfg = config.samfelag.modules.desktop.i3;
   mod = "Mod4";
 
-  cmdModule = lib.types.submodule ({ ... }: {
-    options = {
-      enable = lib.mkOption {
-        type = lib.types.bool;
-        default = true;
-      };
-      command = lib.mkOption {
-        type = lib.types.str;
-        example = "${pkgs.rofi}/bin/rofi rofi -show run";
-      };
-    };
-  });
-
   system_mode = "System (l) lock, (e) logout, (s) suspend, (h) hibernate, (r) reboot, (Shift+s) shutdown";
 
-  bg_colour = "#808F85";
-
-  paths = {
-    wallpapers = ../../data/wallpapers;
-  };
-
 in {
 
-  options.samfelag.modules.desktop.i3 = {
-    enable = lib.mkEnableOption "i3 window manager";
+  options.samfelag.modules.desktop.i3 = with lib; {
+    enable = mkEnableOption "i3 window manager";
 
-    laptop = lib.mkOption {
-      description = "Enable features for a laptop (trackpad, battery, etc...)";
-      type = lib.types.bool;
-      default = false;
-    };
+    mod = my.mkOpt' types.str "Mod4" "Main modifier key for i3";
+
+    laptop = mkEnableOption "Enable features for a laptop (trackpad, battery, etc...)";
+
+    launcher = mkOption { type = types.str; };
+    terminal = mkOption { type = types.str; };
+    locker = mkOption { type = types.str; };
+
+    extraKeybindings = my.mkOpt (types.attrsOf types.str) {};
+    extraStartup = my.mkOpt (types.listOf types.attrs) [ ];
 
-    launcher = lib.mkOption {
-      type = cmdModule;
-    };
-    terminal = lib.mkOption {
-      type = cmdModule;
-    };
-    browser = lib.mkOption {
-      type = cmdModule;
-    };
-    locker = lib.mkOption {
-      type = cmdModule;
-    };
   };
 
   config = lib.mkIf cfg.enable {
@@ -59,8 +33,6 @@ in {
       playerctl
     ];
 
-    hm.xdg.dataFile."wallpapers".source = paths.wallpapers;
-
     services.xserver = {
       enable = true;
 
@@ -121,9 +93,7 @@ in {
 
         startup = [
           { command = "i3-msg workspace 1"; }
-          { command = "systemctl --user restart polybar"; always = true; notification = false; }
-          { command = "feh --bg-center -B \"${bg_colour}\" -z --no-fehbg ${paths.wallpapers}/flors"; always = true; notification = false; }
-        ];
+        ] ++ cfg.extraStartup;
 
         modes = {
           "resize" = {
@@ -142,10 +112,10 @@ in {
           };
 
           "${system_mode}" = {
-            "l" = "exec --no-startup-id ${cfg.locker.command}, mode \"default\"";
+            "l" = "exec --no-startup-id ${cfg.locker}, mode \"default\"";
             "e" = "exec --no-startup-id i3-msg exit, mode \"default\"";
-            "s" = "exec --no-startup-id ${cfg.locker.command} && systemctl suspend, mode \"default\"";
-            "h" = "exec --no-startup-id ${cfg.locker.command} && systemctl hibernate, mode \"default\"";
+            "s" = "exec --no-startup-id ${cfg.locker} && systemctl suspend, mode \"default\"";
+            "h" = "exec --no-startup-id ${cfg.locker} && systemctl hibernate, mode \"default\"";
             "r" = "exec --no-startup-id systemctl reboot, mode \"default\"";
             "Shift+s" = "exec --no-startup-id systemctl poweroff -i, mode \"default\"";
 
@@ -242,16 +212,9 @@ in {
           "${mod}+Shift+9" = "move container to workspace 9; workspace 9";
           "${mod}+Shift+0" = "move container to workspace 10; workspace 10";
 
-        }
-        // (if cfg.terminal.enable then {
-          "${mod}+Return" = "exec ${cfg.terminal.command}";
-        } else {})
-        // (if cfg.launcher.enable then {
-          "${mod}+space" = "exec ${cfg.launcher.command}";
-        } else {})
-        // (if cfg.browser.enable then {
-          "${mod}+Control+3" = "exec ${cfg.browser.command}";
-        } else {});
+          "${mod}+Return" = "exec ${cfg.terminal}";
+          "${mod}+space" = "exec ${cfg.launcher}";
+        } // cfg.extraKeybindings;
       };
     };
   };