Start working on universal.nix for all hosts

nixos/universal.nix

@@ -0,0 +1,56 @@
+{
+  config,
+  pkgs,
+  unstable,
+  inputs,
+  nix-your-shell,
+  ...
+}:
+
+{
+  nixpkgs.overlays = [
+    nix-your-shell.overlays.default
+  ];
+
+  nix.settings.experimental-features = [
+    "nix-command"
+    "flakes"
+  ];
+
+  # Set your time zone.
+  time.timeZone = "Australia/Melbourne";
+
+  fonts = {
+    fontDir.enable = true;
+    enableGhostscriptFonts = true;
+    packages = with pkgs; [
+      nerdfonts
+      # berkeley-mono-typeface
+    ];
+  };
+
+  programs.firefox.enable = true;
+
+  programs.gnupg.agent = {
+    enable = true;
+    enableSSHSupport = true;
+  };
+
+  programs.fish = {
+    enable = true;
+    interactiveShellInit = ''
+      nix-your-shell fish | source
+    '';
+  };
+
+  programs.bash = {
+    interactiveShellInit = ''
+      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
+    '';
+  };
+
+}