From ab887d926c2665a708fbe9e6c4654042cc5f4c60 Mon Sep 17 00:00:00 2001
From: Shihua Zeng <76579810+Bekaboo@users.noreply.github.com>
Date: Thu, 20 Mar 2025 19:40:24 -0400
Subject: [PATCH] fix: indexing nil when env vars does not exist (#601)

---
 lua/oil/clipboard.lua | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lua/oil/clipboard.lua b/lua/oil/clipboard.lua
index 32bcfdb..5a17850 100644
--- a/lua/oil/clipboard.lua
+++ b/lua/oil/clipboard.lua
@@ -10,7 +10,11 @@ local M = {}
 
 ---@return "wayland"|"x11"|nil
 local function get_linux_session_type()
-  local xdg_session_type = vim.env.XDG_SESSION_TYPE:lower()
+  local xdg_session_type = vim.env.XDG_SESSION_TYPE
+  if not xdg_session_type then
+    return
+  end
+  xdg_session_type = xdg_session_type:lower()
   if xdg_session_type:find("x11") then
     return "x11"
   elseif xdg_session_type:find("wayland") then
@@ -23,7 +27,9 @@ end
 ---@return boolean
 local function is_linux_desktop_gnome()
   local cur_desktop = vim.env.XDG_CURRENT_DESKTOP
-  local idx = vim.env.XDG_SESSION_DESKTOP:lower():find("gnome") or cur_desktop:lower():find("gnome")
+  local session_desktop = vim.env.XDG_SESSION_DESKTOP
+  local idx = session_desktop and session_desktop:lower():find("gnome")
+    or cur_desktop and cur_desktop:lower():find("gnome")
   return idx ~= nil or cur_desktop == "X-Cinnamon" or cur_desktop == "XFCE"
 end