ad38f4b371
Summary: 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. Fixes https://github.com/clangd/clangd/issues/341 Reviewers: sammccall, chandlerc, Bigcheese Reviewed By: sammccall Subscribers: hiraditya, ilya-biryukov, MaskRay, jkorous, dexonsmith, arphaman, kadircet, ormris, usaxena95, cfe-commits, llvm-commits Tags: #clang-tools-extra, #clang, #llvm Differential Revision: https://reviews.llvm.org/D78501
llvm/lib/Support/Unix README =========================== This directory provides implementations of the lib/System classes that are common to two or more variants of UNIX. For example, the directory structure underneath this directory could look like this: Unix - only code that is truly generic to all UNIX platforms Posix - code that is specific to Posix variants of UNIX SUS - code that is specific to the Single Unix Specification SysV - code that is specific to System V variants of UNIX As a rule, only those directories actually needing to be created should be created. Also, further subdirectories could be created to reflect versions of the various standards. For example, under SUS there could be v1, v2, and v3 subdirectories to reflect the three major versions of SUS.