refactor: switching to kickstart-nix.nvim

.envrc

@@ -0,0 +1 @@
+use_flake .

flake.nix

@@ -5,10 +5,14 @@
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     flake-parts.url = "github:hercules-ci/flake-parts";
     nixvim.url = "github:nix-community/nixvim";
+    gen-luarc.url = "github:mrcjkb/nix-gen-luarc-json";
   };
 
   outputs =
     { flake-parts, ... }@inputs:
+    let
+      neovim-overlay = import ./nix/neovim-overlay.nix { inherit inputs; };
+    in
     flake-parts.lib.mkFlake { inherit inputs; } {
       # debug = true;
 
@@ -18,7 +22,30 @@
       ];
 
       imports = [
-        ./flake-module.nix
+        ./nixvim.nix
       ];
+
+      perSystem =
+        { pkgs, system, ... }:
+        {
+          _module.args.pkgs = import inputs.nixpkgs {
+            inherit system;
+            overlays = [
+              neovim-overlay
+              inputs.gen-luarc.overlays.default
+            ];
+          };
+
+          devShells.default = pkgs.mkShell {
+            name = "nvim-devShell";
+            buildInputs = with pkgs; [
+              lua-language-server
+              nil
+              stylua
+              luajitPackages.luacheck
+              nvim-dev
+            ];
+          };
+        };
     };
 }

nix/neovim-overlay.nix

@@ -0,0 +1,37 @@
+{ inputs }:
+final: prev:
+with final.pkgs.lib;
+let
+  pkgs = final;
+
+  # Make sure we use the pinned nixpkgs instance for wrapNeovimUnstable,
+  # otherwise it could have an incompatible signature when applying this overlay.
+  pkgs-locked = inputs.nixpkgs.legacyPackages.${pkgs.system};
+
+  mkNeovim = pkgs.callPackage ./mkNeovim.nix {
+    inherit (pkgs-locked) neovimUtils wrapNeovimUnstable;
+  };
+
+  plugins = [ ];
+
+  extraPackages = with pkgs; [
+    lua-language-server
+    nil
+  ];
+in
+{
+  # This is the neovim derivation
+  # returned by the overlay
+  nvim-pkg = mkNeovim {
+    inherit extraPackages plugins;
+  };
+
+  # This is meant to be used within a devshell.
+  # Instead of loading the lua Neovim configuration from
+  # the Nix store, it is loaded from $XDG_CONFIG_HOME/nvim-dev
+  nvim-dev = mkNeovim {
+    inherit extraPackages plugins;
+    appName = "nvim-dev";
+    wrapRc = false;
+  };
+}