🐛 BUG: Ports are not auto-assigned for devPort and hmrPort when starting two dev servers

[jasikpark]

What package manager are you using?

yarn

What operating system are you using?

Mac

Describe the Bug

I thought this was already sorted, but I got this error when I was running yarn workspace docs start in astro and yarn start in an starter project outside of the repo:

✗  yarn start
yarn run v1.22.10
$ astro dev
[18:46:27] [snowpack] Hint: run "snowpack init" to create a project config file. Using defaults...
[18:46:37] [snowpack] Ready!
node:events:371
      throw er; // Unhandled 'error' event
      ^

Error: listen EADDRINUSE: address already in use :::12321
    at Server.setupListenHandle [as _listen2] (node:net:1315:16)
    at listenInCluster (node:net:1363:12)
    at Server.listen (node:net:1450:7)
    at new WebSocketServer (/private/var/folders/9r/wd2vc1h90f97jzm2xxd754qw0000gn/T/tmp.pLhRyhMz/node_modules/ws/lib/websocket-server.js:90:20)
    at new EsmHmrEngine (/private/var/folders/9r/wd2vc1h90f97jzm2xxd754qw0000gn/T/tmp.pLhRyhMz/node_modules/snowpack/lib/cjs/hmr-server-engine.js:24:15)
    at Object.startHmrEngine (/private/var/folders/9r/wd2vc1h90f97jzm2xxd754qw0000gn/T/tmp.pLhRyhMz/node_modules/snowpack/lib/cjs/dev/hmr.js:14:23)
    at startServer (/private/var/folders/9r/wd2vc1h90f97jzm2xxd754qw0000gn/T/tmp.pLhRyhMz/node_modules/snowpack/lib/cjs/commands/dev.js:801:17)
    at async createSnowpack (file:///private/var/folders/9r/wd2vc1h90f97jzm2xxd754qw0000gn/T/tmp.pLhRyhMz/node_modules/astro/dist/runtime.js:321:14)
    at async createRuntime (file:///private/var/folders/9r/wd2vc1h90f97jzm2xxd754qw0000gn/T/tmp.pLhRyhMz/node_modules/astro/dist/runtime.js:341:7)
    at async dev (file:///private/var/folders/9r/wd2vc1h90f97jzm2xxd754qw0000gn/T/tmp.pLhRyhMz/node_modules/astro/dist/dev.js:17:19)
Emitted 'error' event on WebSocketServer instance at:
    at Server.emit (node:events:394:28)
    at emitErrorNT (node:net:1342:8)
    at processTicksAndRejections (node:internal/process/task_queues:83:21) {
  code: 'EADDRINUSE',
  errno: -48,
  syscall: 'listen',
  address: '::',
  port: 12321
}
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Steps to Reproduce

1. clone astro
2. yarn workspace docs start and yarn workspace www start
3. Error!

Link to Minimal Reproducible Example (Optional)

the astro repo 😆

[matthewp]

This was fixed here: #695

[jasikpark]

That does not seem to be the case when testing with two astro projects: jasikpark/astro-katex and snowpackjs/astro/www, both of which are on astro@latest

[mihkeleidast]

sindresorhus/get-port#56 got merged today, which will maybe (🤞 ) fix this issue.

[natemoo-re]

This should definitely be fixed now in v0.21, but please feel free to reopen if this issue persists.