RegTest: support Windows

[curiousdannii]

When trying to use this on Windows this error occurs:

OSError: [WinError 10093] Either the application has not called WSAStartup, or WSAStartup failed

Stackoverflow says this is because select.select only supports sockets, which stdout is not on Windows.

[erkyrath]

Anyone know what the right idiom for this is on Windows? Hunting around, I only find "make your whole program async" (no thanks); "use threads" (gah); "try os.set_blocking(False)" (maybe? only a localized pain in the ass, at least).

[curiousdannii]

No idea sorry.

[curiousdannii]

Hunting around, I only find "make your whole program async" (no thanks);

Unlike JS, it looks like you can run an async function within sync code with asyncio.run. So this would hopefully allow for a small compatibility function to handle stdout+timeouts without needing to change the whole program.

This has some other options too https://stackoverflow.com/q/55647753/2854284
asyncio.run may not be enough, but it would be worth trying.

[curiousdannii]

I gave it a try but couldn't get it working. It doesn't help that the Python docs are not clearly written (why don't functions clearly say what the return value is and link to where the type is defined?!)

Rewriting it in JS (or erasable syntax TS) might well be easier.

[sarganar]

Hi! This works for me: (spoiler: using os.set_blocking(False) )

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