[clang-tools-extra] [clangd] fix wrong resouce-dir (PR #203332)

[Aleksandr Platonov via cfe-commits]

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@@ -135,6 +135,25 @@ std::string detectStandardResourceDir() {
   return GetResourcesPath("clangd", (void *)&StaticForMainAddr);
 }
 
+std::optional<std::string>
+detectResourceDirWithClangPath(std::optional<std::string> ClangPath) {
+  std::string ResourceDir = detectStandardResourceDir();
+  if (llvm::sys::fs::exists(ResourceDir)) {
+    return ResourceDir;
+  }
+  log("Detect default -resource-dir={0} not valid", ResourceDir);
+
+  if (ClangPath.has_value()) {
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ArcsinX wrote:

nit: just `if (ClangPath)`

https://github.com/llvm/llvm-project/pull/203332