[PATCH] D91029: [clangd] Implement clang-tidy options from config

[Nathan James via Phabricator via cfe-commits]

njames93 created this revision.
njames93 added reviewers: sammccall, kadircet.
Herald added subscribers: cfe-commits, usaxena95, arphaman, mgorny.
Herald added a project: clang.
njames93 requested review of this revision.
Herald added subscribers: MaskRay, ilya-biryukov.

Added some new ClangTidyOptionsProvider like classes designed for clangd work flow.
These providers are designed to source the options on the worker thread but in a thread safe manner.
This is done through making the options getter take a pointer to the filesystem used by the worker thread which natuarally is from a ThreadsafeFS.
Internal caching in the providers is also guarded.

The providers don't inherit from `ClangTidyOptionsProvider` instead they share a base class which is able to create a provider for the `ClangTidyContext` using a specific FileSystem.
This approach means one provider can be used for multiple contexts even though `ClangTidyContext` owns its provider.

Depends on D90531 <https://reviews.llvm.org/D90531>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D91029

Files:
  clang-tools-extra/clangd/CMakeLists.txt
  clang-tools-extra/clangd/ClangdServer.cpp
  clang-tools-extra/clangd/ClangdServer.h
  clang-tools-extra/clangd/Compiler.h
  clang-tools-extra/clangd/ParsedAST.cpp
  clang-tools-extra/clangd/TidyProvider.cpp
  clang-tools-extra/clangd/TidyProvider.h
  clang-tools-extra/clangd/tool/Check.cpp
  clang-tools-extra/clangd/tool/ClangdMain.cpp
  clang-tools-extra/clangd/unittests/CMakeLists.txt
  clang-tools-extra/clangd/unittests/ClangdTests.cpp
  clang-tools-extra/clangd/unittests/DiagnosticsTests.cpp
  clang-tools-extra/clangd/unittests/ParsedASTTests.cpp
  clang-tools-extra/clangd/unittests/TestTU.cpp
  clang-tools-extra/clangd/unittests/TestTU.h
  clang-tools-extra/clangd/unittests/TestTidyProvider.cpp
  clang-tools-extra/clangd/unittests/TestTidyProvider.h

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