Add support for waitUntil in Supabase context

[riderx]

What is the feature you are proposing?

The feature got released yesterday: https://supabase.com/docs/guides/functions/background-tasks
it uses a new object EdgeRuntime
So we could probably test if it exists to connect waitUntil to it if it is.
this could also be used in getRuntimeKey to return Supabase as runtime

[riderx]

Seems here we can use the userAgent to get it's supabase runtime https://github.com/supabase/edge-runtime/blob/4cbeee8424398a06a8a1b97b166a273199d7013b/crates/sb_core/js/bootstrap.js#L560

[yusukebe]

Hi @riderx

It's interesting.

Regarding waitUntil, in my opinion, we don't have to implement that c.executionCtx.waitUntil supports Supabase because you can get it from the global object EdgeRuntime. That was created for Cloudflare Workers because we can't get the waitUntil globally on Cloudflare Workers.

About a runtime key. The runtime keys are based on WinterCG spec:

https://runtime-keys.proposal.wintercg.org/

If a key like supabase for Supabase is available, we can add it to the getRuntimeKey, but currently, the spec does not have the key for Supabase.