Multiple Signal Handler

[kt3k]

PR #3757 tries to add the signal handler function Deno.signal(signo). This only handles one kind of signals for each Deno.signal call.

If we add an API which handles multiple kinds of signals at once, what is the interface of that function? Where it belongs?

Option 1: Enhance Deno.signal()

Deno.signal takes multiple signals.

const sig = Deno.signal(Deno.Signal.SIGTERM, Deno.Signal.SIGINT);

for await (_ of sig) {
  console.log("SIGTERM or SIGINT received");
}

Option 2: Have a function for it in deno_std

import { signal } from "https://deno.land/std/signal/mod.ts";

const sig = signal(Deno.Signal.SIGTERM, Deno.Signal.SIGINT)

for await (_ of sig) {
  console.log("SIGTERM or SIGINT received");
}

Other: Please write in the comment

cc @axetroy

[axetroy]

I think the first option Option 1: Enhance Deno.signal() is better

If PR #3757 land.

Then only supports one signal, but it can be extended later to support multiple signals without BREAKING CHANGE.

[kevinkassimo]

I feel it is more of a general utility: combine, multiplex and iterate 2 independent async iterators. It does not really need to be functionality built into just signal handlers.

We can implement this as a new util in std

Actually I think MuxAsyncIterator might be used here.