[PATCH] D109498: [clang][deps] Stop using `ClangTool` for virtual files

[Jan Svoboda via Phabricator via cfe-commits]

jansvoboda11 created this revision.
jansvoboda11 added reviewers: Bigcheese, dexonsmith, ahatanak.
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This patch changes how the dependency scanner creates the fake input file when scanning dependencies of a single module (introduced in D109485 <https://reviews.llvm.org/D109485>). The scanner now has its own `InMemoryFilesystem` which sits under the minimizing FS (when that's requested). This makes it possible to drop the duplicate work in `DependencyScanningActions::runInvocation` that sets up the main file ID. Besides that, this patch makes it possible to land D108979 <https://reviews.llvm.org/D108979>, where we drop `ClangTool` entirely.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D109498

Files:
  clang/include/clang/Tooling/DependencyScanning/DependencyScanningWorker.h
  clang/lib/Tooling/DependencyScanning/DependencyScanningWorker.cpp

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