1 files changed, 78 insertions, 0 deletions
diff --git a/nixos/modules/services/x11/window-managers/i3.nix b/nixos/modules/services/x11/window-managers/i3.nix
new file mode 100644
index 00000000000..99f9997024f
--- /dev/null
+++ b/nixos/modules/services/x11/window-managers/i3.nix
@@ -0,0 +1,78 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.xserver.windowManager.i3;
+in
+
+{
+  options.services.xserver.windowManager.i3 = {
+    enable = mkEnableOption "i3 window manager";
+
+    configFile = mkOption {
+      default     = null;
+      type        = with types; nullOr path;
+      description = ''
+        Path to the i3 configuration file.
+        If left at the default value, $HOME/.i3/config will be used.
+      '';
+    };
+
+    extraSessionCommands = mkOption {
+      default     = "";
+      type        = types.lines;
+      description = ''
+        Shell commands executed just before i3 is started.
+      '';
+    };
+
+    package = mkOption {
+      type        = types.package;
+      default     = pkgs.i3;
+      defaultText = literalExpression "pkgs.i3";
+      example     = literalExpression "pkgs.i3-gaps";
+      description = ''
+        i3 package to use.
+      '';
+    };
+
+    extraPackages = mkOption {
+      type = with types; listOf package;
+      default = with pkgs; [ dmenu i3status i3lock ];
+      defaultText = literalExpression ''
+        with pkgs; [
+          dmenu
+          i3status
+          i3lock
+        ]
+      '';
+      description = ''
+        Extra packages to be installed system wide.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.xserver.windowManager.session = [{
+      name  = "i3";
+      start = ''
+        ${cfg.extraSessionCommands}
+
+        ${cfg.package}/bin/i3 ${optionalString (cfg.configFile != null)
+          "-c /etc/i3/config"
+        } &
+        waitPID=$!
+      '';
+    }];
+    environment.systemPackages = [ cfg.package ] ++ cfg.extraPackages;
+    environment.etc."i3/config" = mkIf (cfg.configFile != null) {
+      source = cfg.configFile;
+    };
+  };
+
+  imports = [
+    (mkRemovedOptionModule [ "services" "xserver" "windowManager" "i3-gaps" "enable" ]
+      "Use services.xserver.windowManager.i3.enable and set services.xserver.windowManager.i3.package to pkgs.i3-gaps to use i3-gaps.")
+  ];
+}