Is it safe to update document_root directory

[pyretttt]

I'm trying to utilise caching and prebuilt routines to give away static resources. But actually I need to update them, I suppose it's actually race free due to OS synchronisation of file I/O, but just to be sure. Is it alright?

[an-tao]

You could create a temporary file for the new content and rename it to the target file name after writing.

[pyretttt]

I'm not sure if I got you right. Let me describe a little bit more what I'm doing.
I have specified folder for static resources and occasionally replacing this folder withstd::filesystem::copy.
As stated there std::filesystem isn't thread safe, so does it mean replacing static resources folder with new content introducing races with respect to drogon's routines for static resources?

Which synchronisation mechanism for filesystem IO I should choose?

[an-tao]

std::filesystem::rename is an atomic operation on files, so you can use it to recursively rename new files.