From abb3706974ca0b5086110d8f1b0e90daebff758f Mon Sep 17 00:00:00 2001
From: Michael Lingelbach <m.j.lbach@gmail.com>
Date: Thu, 23 Dec 2021 15:20:28 -0500
Subject: fix: only attempt to attach to valid bufnames (#1598)

* Check that a bufname begins with a filesystem root specifier such as a drive letter (Windows) or "/" (Unix)
* Unify with check that buf name is not "" or nil
---
 lua/lspconfig/util.lua | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'lua/lspconfig/util.lua')

diff --git a/lua/lspconfig/util.lua b/lua/lspconfig/util.lua
index 05d844ae..11586d50 100644
--- a/lua/lspconfig/util.lua
+++ b/lua/lspconfig/util.lua
@@ -19,6 +19,14 @@ M.default_config = {
 -- global on_setup hook
 M.on_setup = nil
 
+function M.bufname_valid(bufname)
+  if bufname and bufname ~= '' and (bufname:match '^([a-zA-Z]:).*' or bufname:match '^/') then
+    return true
+  else
+    return false
+  end
+end
+
 function M.validate_bufnr(bufnr)
   validate {
     bufnr = { bufnr, 'n' },
-- 
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