From 611b42f339355e39b7ff06615b7756fca52d3d49 Mon Sep 17 00:00:00 2001
From: Snoweuph <snow@euph.email>
Date: Sat, 11 Apr 2026 17:34:38 +0200
Subject: [PATCH] lsp/presets/basedpyright: init

---
 modules/plugins/lsp/presets/basedpyright.nix | 77 ++++++++++++++++++++
 modules/plugins/lsp/presets/default.nix      |  1 +
 2 files changed, 78 insertions(+)
 create mode 100644 modules/plugins/lsp/presets/basedpyright.nix

diff --git a/modules/plugins/lsp/presets/basedpyright.nix b/modules/plugins/lsp/presets/basedpyright.nix
new file mode 100644
index 00000000..4e9b5b07
--- /dev/null
+++ b/modules/plugins/lsp/presets/basedpyright.nix
@@ -0,0 +1,77 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  inherit (lib.meta) getExe';
+  inherit (lib.modules) mkIf;
+  inherit (lib.options) mkEnableOption;
+  inherit (lib.generators) mkLuaInline;
+  inherit (lib.nvim.dag) entryBefore;
+
+  cfg = config.vim.lsp.presets.basedpyright;
+in {
+  options.vim.lsp.presets.basedpyright = {
+    enable = mkEnableOption "the Based Pyright Language Server";
+  };
+
+  config = mkIf cfg.enable {
+    vim = {
+      lsp.servers.basedpyright = {
+        enable = true;
+        cmd = [(getExe' pkgs.basedpyright "basedpyright-langserver") "--stdio"];
+        root_markers = [".git" "pyrightconfig.json"];
+        settings = {
+          basedpyright = {
+            analysis = {
+              autoSearchPaths = true;
+              useLibraryCodeForTypes = true;
+              diagnosticMode = "openFilesOnly";
+            };
+          };
+        };
+        on_attach = mkLuaInline ''
+          function(client, bufnr)
+            vim.api.nvim_buf_create_user_command(bufnr, 'LspPyrightOrganizeImports', function()
+              local params = {
+                command = 'basedpyright.organizeimports',
+                arguments = { vim.uri_from_bufnr(bufnr) },
+              }
+
+              -- Using client.request() directly because "basedpyright.organizeimports" is private
+              -- (not advertised via capabilities), which client:exec_cmd() refuses to call.
+              -- https://github.com/neovim/neovim/blob/c333d64663d3b6e0dd9aa440e433d346af4a3d81/runtime/lua/vim/lsp/client.lua#L1024-L1030
+              client.request('workspace/executeCommand', params, nil, bufnr)
+            end, {
+              desc = 'Organize Imports',
+            })
+
+            vim.api.nvim_buf_create_user_command(bufnr, 'LspPyrightSetPythonPath', basedpyright_set_python_path, {
+              desc = 'Reconfigure basedpyright with the provided python path',
+              nargs = 1,
+              complete = 'file',
+            })
+          end
+        '';
+      };
+      luaConfigRC.basedpyright-util = entryBefore ["lsp-servers"] ''
+        local function basedpyright_set_python_path(server_name, command)
+          local path = command.args
+          local clients = vim.lsp.get_clients {
+            bufnr = vim.api.nvim_get_current_buf(),
+            name = server_name,
+          }
+          for _, client in ipairs(clients) do
+            if client.settings then
+              client.settings.python = vim.tbl_deep_extend('force', client.settings.python or {}, { pythonPath = path })
+            else
+              client.config.settings = vim.tbl_deep_extend('force', client.config.settings, { python = { pythonPath = path } })
+            end
+            client:notify('workspace/didChangeConfiguration', { settings = nil })
+          end
+        end
+      '';
+    };
+  };
+}
diff --git a/modules/plugins/lsp/presets/default.nix b/modules/plugins/lsp/presets/default.nix
index ed515ef2..c017f45b 100644
--- a/modules/plugins/lsp/presets/default.nix
+++ b/modules/plugins/lsp/presets/default.nix
@@ -1,5 +1,6 @@
 {
   imports = [
+    ./basedpyright.nix
     ./deno.nix
     ./harper.nix
     ./lemminx.nix