[PATCH] D90749: [clangd] Introduce config compilation for External blocks

[Kadir Cetinkaya via Phabricator via cfe-commits]

kadircet created this revision.
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Herald added subscribers: cfe-commits, usaxena95, arphaman.
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Herald added subscribers: ormris, MaskRay, ilya-biryukov.

Compilation logic for External blocks. A few of the high level points:

- Requires exactly one-of File/Server at a time:
  - Server is ignored in case of both, with a warning.
  - Having none is an error, would render ExternalBlock void.
- Ensures mountpoint is an absolute path:
  - Interprets it as relative to FragmentDirectory.
  - Defaults to FragmentDirectory when empty.
- Marks Background as Skip.

Depends on D90748 <https://reviews.llvm.org/D90748>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D90749

Files:
  clang-tools-extra/clangd/Config.h
  clang-tools-extra/clangd/ConfigCompile.cpp
  clang-tools-extra/clangd/unittests/ConfigCompileTests.cpp

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