Use optional package installs.

Instead of the platform detection I’d like uvicorn to use optional installs.

• pip install uvicorn - Just the package itself.
• pip install uvicorn[standard] - uvloop/httptools/websockets
• pip install uvicorn[pure] - asyncio/h11/wsproto
• pip install uvicorn[full] - Everything

[apollo13]

Oh: “Alpine uses a different C library, musl, instead of the more common glibc.” (source)

Yes, this is one of the reasons why I generally try to use debian-based python docker containers because installing in them is way faster (as you can use the prebuilt wheels). As a result you can also use python:slimin the containers which don’t ship GCC. The default python containers ship gcc so you can compile missing stuff.

[tomchristie]

I’m slightly surprised we’re not seeing more folks chiming in with “installing uvicorn fails on my platform”.

Do either of “websockets” (Includes a small C extention but I think has an optional pure python fallback) or “uvloop” also fail to install for you.

I’m wondering if there’s an environment marker or some other workaround we could use to make sure that they only installed optionally.

(Tho we’re probably okay once we move to pip install uvicorn and pip install uvicorn[standard], and can just clearly document any failure cases)