[clang] [Dependency Scanning] Teach `DependencyScanningTool::getModuleDependencies` to Process a List of Module Names (PR #129915)

[Cyndy Ishida via cfe-commits]

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@@ -748,17 +751,21 @@ bool DependencyScanningWorker::computeDependencies(
   InMemoryFS->setCurrentWorkingDirectory(WorkingDirectory);
   SmallString<128> FakeInputPath;
   // TODO: We should retry the creation if the path already exists.
-  llvm::sys::fs::createUniquePath(ModuleName + "-%%%%%%%%.input", FakeInputPath,
+  // FIXME: should we create files for multiple modules? I think so?
+  llvm::sys::fs::createUniquePath(ModuleNames[0] + "-%%%%%%%%.input",
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cyndyishida wrote:

Someone should fact-check me, but I'm pretty sure compiler invocations always need a file to run an action over. 

https://github.com/llvm/llvm-project/pull/129915