[PATCH] D78501: Add a facility to get system cache directory and use it in clangd

[Vojtěch Štěpančík via Phabricator via cfe-commits]

VojtechStep created this revision.
VojtechStep added reviewers: sammccall, chandlerc, Bigcheese.
VojtechStep added a project: clang-tools-extra.
Herald added subscribers: cfe-commits, usaxena95, ormris, kadircet, arphaman, dexonsmith, jkorous, MaskRay, ilya-biryukov, hiraditya.
Herald added a project: clang.

This patch adds a function that is similar to `llvm::sys::path::home_directory`, but provides access to the system cache directory.

For Windows, that is %LOCALAPPDATA%, and applications should put their files under %LOCALAPPDATA%\Organization\Product\.

For *nixes, it adheres to the XDG Base Directory Specification, so it first looks at the XDG_CACHE_HOME environment variable and falls back to ~/.cache/.

Subsequently, the Clangd Index storage leverages this new API to put index files somewhere else than the users home directory.

Previous discussion is here <https://github.com/clangd/clangd/issues/341>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D78501

Files:
  clang-tools-extra/clangd/index/BackgroundIndexStorage.cpp
  llvm/include/llvm/Support/Path.h
  llvm/lib/Support/Unix/Path.inc
  llvm/lib/Support/Windows/Path.inc
  llvm/unittests/Support/Path.cpp

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D78501.258764.patch
Type: text/x-patch
Size: 7262 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20200420/5124b035/attachment.bin>