added tmux module

src/user/modules/tmux/config/shellHook.nix

@@ -0,0 +1,9 @@
+''
+case $- in
+  *i*)
+    if [ -z "$DISPLAY" ] && [ -z "$TMUX" ]; then
+      exec tmux
+    fi
+    ;;
+esac
+''

src/user/modules/tmux/config/tmux.nix

@@ -0,0 +1,10 @@
+''
+bind -n M-C source-file ~/.config/tmux/tmux.conf
+
+bind-key -n M-h select-pane -L
+bind-key -n M-j select-pane -D
+bind-key -n M-k select-pane -U
+bind-key -n M-l select-pane -R
+
+bind-key -n M-q kill-pane
+''

src/user/modules/tmux/default.nix

@@ -0,0 +1,41 @@
+{ pkgs, lib, config, ... }:
+
+with lib;
+let
+  cfg = config.modules.user.tmux;
+  gui = config.modules.user.gui.wm;
+
+  wm = {
+    enable = builtins.any (mod: mod.enable or false) (builtins.attrValues gui);
+  };
+
+in
+{ options.modules.user.tmux = { enable = mkEnableOption "Enable tmux module"; };
+  config = mkIf cfg.enable {
+    programs.bash = mkIf (!wm.enable) {
+      profileExtra = import ./config/shellHook.nix;
+    };
+
+    programs.tmux = {
+      enable = true;
+      newSession = true;
+      disableConfirmationPrompt = true;
+      keyMode = "vi";
+      mouse = if wm.enable then true else false;
+
+      prefix = "M";
+      shell = "\${pkgs.bash}/bin/bash";
+
+      plugins = with pkgs.tmuxPlugins; [
+        {
+          plugin = tilish;
+          extraConfig = ''
+            set -g @tilish-default 'tiled'
+          '';
+        }
+      ];
+
+      extraConfig = import ./config/tmux.nix;
+    };
+  };
+}