On Mon, Aug 20, 2018, at 2:52 PM, Paul Moore wrote:
The various hooks take directory paths as arguments, and typically return a filename (e.g., build_wheel). The returned filename is always explicitly noted as being a unicode string. However, argumnents (metadata_directory in build_wheel/prepare_metadata_for_build_wheel) are not explicitly mandated to be Unicode.
My assumption is that the intent is that all strings, whether arguments or return values, must be Unicode.
I'd say we should handle all paths the same way, i.e. unicode. If it's a serious obstacle, we could alter the specification. But I would be surprised if the required changes to the setuptools backend are so tricky that they warrant a workaround in the specification.