[PATCH] D54694: [clangd] Replay preamble #includes to clang-tidy checks.

[Sam McCall via Phabricator via cfe-commits]

sammccall created this revision.
sammccall added a reviewer: ilya-biryukov.
Herald added subscribers: cfe-commits, kadircet, arphaman, jkorous, MaskRay, ioeric.

This is needed to correctly handle checks that use IncludeInserter,
which is very common.

I couldn't find a totally safe example of a check to enable for testing,
I picked modernize-deprecated-headers which some will probably hate.
We should get configuration working...

This depends on https://reviews.llvm.org/D54691 which ensures our calls to getFile(open=false)
don't break subsequent accesses via the FileManager.


Repository:
  rCTE Clang Tools Extra

https://reviews.llvm.org/D54694

Files:
  clangd/ClangdUnit.cpp
  clangd/Diagnostics.cpp
  clangd/Headers.cpp
  clangd/Headers.h
  unittests/clangd/ClangdUnitTests.cpp
  unittests/clangd/HeadersTests.cpp

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