bytecodealliance
Using file objects (or equivalent) for stdio streams
Now that https://github.com/bytecodealliance/wasmtime-py/pull/33 is here, I understand that it's only possible to open a file on the host filesystem as an stdio stream. But that's (IMO) rarely useful: most WASI programs probably can accept data via files on the command line just as well as via stdio.
What I'd like to do is to capture stdout/stderr of a WASI application. Sure, I can do this by running a new host subprocess (with some caveats) but it would be a lot nicer if wasmtime-py provided this capability directly.
This'll likely require significant implementation work on the C API side of things, but definitely possible to do. I think the underlying support was refactored to support arbitrary "handles" which we could bind as calling back to Python.
This would be helpful in Perl as well. Is there a related issue for the C api in wasmtime?
