refactor(nuxi): hard restart with communication channel

[pi0]

🔗 Linked issue

Followup unresolved fixes from #18641

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Aligning (more) with next version of CLI, this PR improves dev wrapper implementation:

• Use fork to open a communication channel
• Request hard restart via process.send signaling
• Stop the listener and gracefully stop and unallocated nuxt before restarting
• Small fixes for restart handling edge cases
• Make sure old child is closed before starting new one

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

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[danielroe]

Experimenting with #19394, I'm getting this error:

 ERROR  [uncaughtException] Channel closed                                                                                                                                    15:03:45

  at new NodeError (node:internal/errors:393:5)
  at target.send (node:internal/child_process:740:16)
  at packages/nuxi/src/commands/dev.ts:99:21
  at process.processTicksAndRejections (node:internal/process/task_queues:95:5)

Following that error, programmatic restarts no longer work.

[pi0]

Can you directly reproduce it in this branch? (you can use a hook in playground/nuxt.config) What is your node version?

[danielroe]

I can reproduce reliably after a couple of saves. Reproduction:

git checkout feat/modules-dir
git merge --squash origin/fix/cli-restart
pnpm nuxi dev test/fixtures/basic
# modify test/fixtures/basic/modules/example.ts

Running on Node v18.12.1

[pi0]

Try again with latest commit :)

[danielroe]

Seems to be working well 👍