Makes stopWatch() async and graceful.

[VividVisions]

This is the counterpart to 11ty/eleventy-dev-server#85.

[zachleat]

Shipping with 3.0.0-alpha.17 Thank you!!

[zachleat]

FYI I did need to revert the process.exit() removal here. ⌘+C wasn’t stopping the process. I moved it out of the stopWatch method though, so hopefully that will still satisfy your requirements

[VividVisions]

Weird. All tests I did were successful. Did you try with the PR in eleventy-dev-server? Current server isn't async.

[zachleat]

This isn’t a currently tested scenario, unfortunately. Can you check the changes I made linked above and see if they still align? I don’t expect that we’ll need to revert any of the async changes you made, it was only the process.exit() placement

[VividVisions]

I'm sorry, my description of this PR should have been more thorough.

This PR goes hand in hand with my PR in eleventy-dev-server (11ty/eleventy-dev-server#85). They need each other to work properly. Applying only one but not the other doesn't improve anything, unfortunately.

Regarding the process not stopping, my best guess is: The current dev-server doesn't close the WebSocket connection(s), which would prevent a clean exit. Reintroducing process.exit() actually renders both PRs moot since it prevents a graceful shutdown. :(

Please let me know if I can support you in any way.

[zachleat]

Restored your original changes and they’ll ship with Dev Server v2.0.2 in 3.0.0-alpha.18—thank you so much!

[VividVisions]

That's awesome! Thank you!