feat: home manager module

flake.nix

@@ -45,5 +45,9 @@
       };
       default = self.packages."${pkgs.system}".neovim;
     });
+    homeManagerModules = {
+      neovim = import ./nixos.nix {inherit self;};
+      default = self.homeManagerModules.neovim;
+    };
   };
 }

home.nix

@@ -0,0 +1,41 @@
+{self}: {
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  neovim = self.packages.${pkgs.system}.default;
+  cfg = config.neovim;
+in
+  with lib; {
+    options = {
+      enable = mkOption {
+        type = with types; bool;
+        default = true;
+      };
+      package = mkOption {
+        type = with types; package;
+        default = neovim;
+      };
+      vimdiffAlias = mkOption {
+        type = with types; bool;
+        default = true;
+      };
+      defaultEditor = mkOption {
+        type = with types; bool;
+        default = true;
+      };
+    };
+    config = mkIf cfg.enable {
+      home.sessionVariables = {EDITOR = "nvim";};
+
+      home.programs = [cfg.package];
+
+      programs.bash.shellAliases = mkIf cfg.vimdiffAlias {vimdiff = "nvim -d";};
+      programs.fish.shellAliases = mkIf cfg.vimdiffAlias {vimdiff = "nvim -d";};
+      programs.zsh.shellAliases = mkIf cfg.vimdiffAlias {vimdiff = "nvim -d";};
+
+      # Disable home-manager's Neovim
+      programs.neovim.enable = mkForce false;
+    };
+  }