add some gnome customization

modules/home-manager/fish.nix

@@ -0,0 +1,38 @@
+{pkgs, ...}: 
+{
+  programs.fzf = {
+    enable = true;
+  };
+
+
+  programs.fish = {
+    enable = true;
+    # enableCompletion = true;
+    plugins = [
+      {
+        name = "fzf-fish";
+        src = pkgs.fetchFromGitHub {
+          owner = "PatrickF1";
+          repo = "fzf.fish";
+          rev = "v10.3";
+          sha256 = "sha256-T8KYLA/r/gOKvAivKRoeqIwE2pINlxFQtZJHpOy9GMM=";
+        };
+      }
+      # add others here
+    ];
+  };
+
+  # sets the "default" shell to fish
+  # actually keeps bash as a posix-compliant default but starts fish if the shell is not bash
+  # See https://nixos.wiki/wiki/Fish
+  programs.bash = {
+    enable = true;
+    initExtra = ''
+      if [[ $(${pkgs.procps}/bin/ps --no-header --pid=$PPID --format=comm) != "fish" && -z ''${BASH_EXECUTION_STRING} ]]
+      then
+        shopt -q login_shell && LOGIN_OPTION='--login' || LOGIN_OPTION=""
+        exec ${pkgs.fish}/bin/fish $LOGIN_OPTION
+      fi
+    '';
+  };
+}

modules/home-manager/gnome-shell-customization.nix

@@ -0,0 +1,15 @@
+{pkgs, ...}: 
+{
+    ## Gnome extensions
+    programs.gnome-shell = {
+        enable = true;
+        extensions = [
+            { package = pkgs.gnomeExtensions.dash-to-panel; }
+            {
+                id = "tilingshell@ferrarodomenico.com";
+                package = pkgs.gnome.gnome-shell-extensions;
+            }
+
+        ];
+    };
+}

modules/nixos/gdm.nix

@@ -33,6 +33,7 @@
         gnome.gnome-weather
         gnome-secrets
         gnome.gnome-characters
+        gnome.gnome-font-viewer
     ]);
 
 }