r346485 - [Tooling] Avoid diagnosing missing input files in an edge-case where it's incorrect.

[Sam McCall via cfe-commits]

Author: sammccall
Date: Fri Nov  9 03:49:22 2018
New Revision: 346485

URL: http://llvm.org/viewvc/llvm-project?rev=346485&view=rev
Log:
[Tooling] Avoid diagnosing missing input files in an edge-case where it's incorrect.

Modified:
    cfe/trunk/lib/Tooling/Tooling.cpp

Modified: cfe/trunk/lib/Tooling/Tooling.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Tooling/Tooling.cpp?rev=346485&r1=346484&r2=346485&view=diff
==============================================================================
--- cfe/trunk/lib/Tooling/Tooling.cpp (original)
+++ cfe/trunk/lib/Tooling/Tooling.cpp Fri Nov  9 03:49:22 2018
@@ -303,6 +303,12 @@ bool ToolInvocation::run() {
 
   const std::unique_ptr<driver::Driver> Driver(
       newDriver(&Diagnostics, BinaryName, Files->getVirtualFileSystem()));
+  // The "input file not found" diagnostics from the driver are useful.
+  // The driver is only aware of the VFS working directory, but some clients
+  // change this at the FileManager level instead.
+  // In this case the checks have false positives, so skip them.
+  if (!Files->getFileSystemOpts().WorkingDir.empty())
+    Driver->setCheckInputsExist(false);
   const std::unique_ptr<driver::Compilation> Compilation(
       Driver->BuildCompilation(llvm::makeArrayRef(Argv)));
   if (!Compilation)