neo-tree: add hijack netrw

modules/plugins/filetree/neo-tree/config.nix

@@ -4,6 +4,7 @@
   ...
 }: let
   inherit (lib.modules) mkIf;
+  inherit (lib.strings) optionalString;
 
   cfg = config.vim.filetree.neo-tree;
 in {
@@ -21,7 +22,28 @@ in {
         setupModule = "neo-tree";
         inherit (cfg) setupOpts;
 
+        beforeAll =
+          optionalString (cfg.setupOpts.filesystem.hijack_netrw_behavior != "disabled")
+          # from https://github.com/nvim-neo-tree/neo-tree.nvim/discussions/1326
+          ''
+            vim.api.nvim_create_autocmd("BufEnter", {
+              group = vim.api.nvim_create_augroup("load_neo_tree", {}),
+              desc = "Loads neo-tree when openning a directory",
+              callback = function(args)
+                local stats = vim.uv.fs_stat(args.file)
+
+                if not stats or stats.type ~= "directory" then
+                  return
+                end
+
+                require("lz.n").trigger_load("neo-tree-nvim")
+
+                return true
+              end,
+            })
+          '';
         cmd = ["Neotree"];
+        event = [];
       };
 
       visuals.nvimWebDevicons.enable = true;

modules/plugins/filetree/neo-tree/neo-tree.nix

@@ -1,5 +1,5 @@
 {lib, ...}: let
-  inherit (lib.types) bool str int submodule enum either listOf;
+  inherit (lib.types) bool str enum either listOf;
   inherit (lib.options) mkOption mkEnableOption literalExpression;
   inherit (lib.nvim.types) mkPluginSetupOption;
 in {
@@ -150,6 +150,14 @@ in {
           A list of filetypes that should not be replaced when opening a file
         '';
       };
+
+      filesystem = {
+        hijack_netrw_behavior = mkOption {
+          type = enum ["disabled" "open_default" "open_current"];
+          default = "open_default";
+          description = "Hijack Netrw behavior";
+        };
+      };
     };
   };
 }