Use fish shell

flake.nix

@@ -51,8 +51,8 @@
       desktop = nixpkgs.lib.nixosSystem {
         specialArgs = {inherit inputs outputs;};
         modules = [
-          # > Our main nixos configuration file <
           ./nixos/configuration.nix
+          ./modules/nixos
         ];
       };
     };
@@ -64,8 +64,8 @@
         pkgs = nixpkgs.legacyPackages.x86_64-linux; # Home-manager requires 'pkgs' instance
         extraSpecialArgs = {inherit inputs outputs;};
         modules = [
-          # > Our main home-manager configuration file <
           ./home-manager/home.nix
+          ./modules/home-manager
         ];
       };
     };

home-manager/home.nix

@@ -17,30 +17,15 @@
 
     # You can also split up your configuration and import pieces of it here:
     # ./nvim.nix
-    ../modules/home-manager
   ];
 
   nixpkgs = {
-    # You can add overlays here
     overlays = [
-      # Add overlays your own flake exports (from overlays and pkgs dir):
       outputs.overlays.additions
       outputs.overlays.modifications
       outputs.overlays.unstable-packages
-
-      # You can also add overlays exported from other flakes:
-      # neovim-nightly-overlay.overlays.default
-
-      # Or define it inline, for example:
-      # (final: prev: {
-      #   hi = final.hello.overrideAttrs (oldAttrs: {
-      #     patches = [ ./change-hello-to-hi.patch ];
-      #   });
-      # })
     ];
-    # Configure your nixpkgs instance
     config = {
-      # Disable if you don't want unfree packages
       allowUnfree = true;
     };
   };

modules/home-manager/default.nix

@@ -1,5 +1,6 @@
-{ ... }: {
+{
   imports = [
     ./git.nix
+    ./fish.nix
   ];
 }

modules/home-manager/fish.nix

@@ -0,0 +1,22 @@
+{ pkgs, ... }: {
+  home.packages = with pkgs; [
+    fishPlugins.tide
+  ];
+  
+  programs.fish = {
+    enable = true;
+    interactiveShellInit = ''
+      # no greeting
+      set fish_greeting
+      # vi key binds
+      set -g fish_key_bindings fish_vi_key_bindings
+      # accept completion with ctrl-y
+      bind --mode insert \cy forward-char
+      # initialize prompt
+      tide configure --auto --style=Lean --prompt_colors='16 colors' --show_time=No --lean_prompt_height='Two lines' --prompt_connection=Disconnected --prompt_spacing=Compact --icons='Few icons' --transient=Yes
+    '';
+    shellAbbrs = {
+      la = "ls -lahH";
+    };
+  };
+}

modules/nixos/default.nix

@@ -1,6 +1,5 @@
-# Add your reusable NixOS modules to this directory, on their own file (https://nixos.wiki/wiki/Module).
-# These should be stuff you would like to share with others, not your personal configurations.
 {
-  # List your module files here
-  # my-module = import ./my-module.nix;
+  imports = [
+    ./fish.nix
+  ];
 }

modules/nixos/fish.nix

@@ -0,0 +1,4 @@
+{ pkgs, ... }: {
+  programs.fish.enable = true;
+  users.defaultUserShell = pkgs.fish;
+}