From 8265ea062b4c37dc1b9846ec83bb8c9615048ef1 Mon Sep 17 00:00:00 2001
From: Dobry Nikolov <dobry989@gmail.com>
Date: Tue, 2 Jun 2026 20:30:19 +0300
Subject: [PATCH] filetree/nvimtree: remove deprecated `system_open` option
 (#1622)

---
 docs/manual/release-notes/rl-0.9.md           |  5 ++++
 modules/extra/deprecations.nix                | 10 ++++++++
 .../plugins/filetree/nvimtree/nvimtree.nix    | 23 -------------------
 3 files changed, 15 insertions(+), 23 deletions(-)

diff --git a/docs/manual/release-notes/rl-0.9.md b/docs/manual/release-notes/rl-0.9.md
index b819ba83..679f05ae 100644
--- a/docs/manual/release-notes/rl-0.9.md
+++ b/docs/manual/release-notes/rl-0.9.md
@@ -130,6 +130,11 @@
 
 ## Changelog {#sec-release-0-9-changelog}
 
+[bovf](https://github.com/bovf):
+
+- Removed the deprecated `system_open` setup option from `nvim-tree.lua` to
+  avoid startup warnings now that upstream uses `vim.ui.open()`.
+
 [ErinaYip](https://github.com/ErinaYip):
 
 - Fixed and updated `lualine` options:
diff --git a/modules/extra/deprecations.nix b/modules/extra/deprecations.nix
index 6ad2e633..8ec5a3ef 100644
--- a/modules/extra/deprecations.nix
+++ b/modules/extra/deprecations.nix
@@ -378,5 +378,15 @@ in {
     [
       (mkRenamedOptionModule ["vim" "languages" "typescript" "treesitter" "tsxPackage"] ["vim" "languages" "tsx" "treesitter" "package"])
     ]
+
+    # 2026-06-02
+    [
+      (mkRemovedOptionModule ["vim" "filetree" "nvimTree" "systemOpen" "args"] ''
+        nvim-tree.lua removed system_open and now uses Neovim's vim.ui.open().
+      '')
+      (mkRemovedOptionModule ["vim" "filetree" "nvimTree" "systemOpen" "cmd"] ''
+        nvim-tree.lua removed system_open and now uses Neovim's vim.ui.open().
+      '')
+    ]
   ];
 }
diff --git a/modules/plugins/filetree/nvimtree/nvimtree.nix b/modules/plugins/filetree/nvimtree/nvimtree.nix
index e3d36703..1bfdcb27 100644
--- a/modules/plugins/filetree/nvimtree/nvimtree.nix
+++ b/modules/plugins/filetree/nvimtree/nvimtree.nix
@@ -28,10 +28,6 @@
     reloadOnBufEnter = "reload_on_buf_enter";
     respectBufCwd = "respect_buf_cwd";
     hijackDirectories = "hijack_directories";
-    systemOpen = {
-      args = "args";
-      cmd = "cmd";
-    };
     diagnostics = "diagnostics";
     git = {
       enable = "enable";
@@ -228,25 +224,6 @@ in {
         };
       };
 
-      system_open = {
-        args = mkOption {
-          default = [];
-          description = "Optional argument list.";
-          type = listOf str;
-        };
-
-        cmd = mkOption {
-          default =
-            if pkgs.stdenv.isDarwin
-            then "open"
-            else if pkgs.stdenv.isLinux
-            then "${pkgs.xdg-utils}/bin/xdg-open"
-            else throw "NvimTree: No default system open command for this platform, please set `vim.filetree.nvimTree.systemOpen.cmd`";
-          description = "The open command itself";
-          type = str;
-        };
-      };
-
       diagnostics = mkOption {
         description = ''
           Show LSP and COC diagnostics in the signcolumn