[all-commits] [llvm/llvm-project] 73fdd9: [clangd] Implement clang-tidy options from config

[Nathan James via All-commits]

  Branch: refs/heads/temp-test-main
  Home:   https://github.com/llvm/llvm-project
  Commit: 73fdd998701cce3aa6c4d8d2a73ab97351a0313b
      https://github.com/llvm/llvm-project/commit/73fdd998701cce3aa6c4d8d2a73ab97351a0313b
  Author: Nathan James <n.james93 at hotmail.co.uk>
  Date:   2020-11-25 (Wed, 25 Nov 2020)

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

  Log Message:
  -----------
  [clangd] Implement clang-tidy options from config

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

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D91029