Support to attach multiple sockets

[ikhsan]

For https://github.com/ruby/vscode-rdbg/issues/372

• Introduce a new adapter MultiSessionDebugAdapter where it emits events with all socket paths
• Add a listener that subscribes to custom events that MultiSessionDebugAdapter emits, which attach it as a child process
• This is enabled via supportAttachMultiSockets config

Screenshot

When running a rails server with 4 processes

Before	After
when set tofalse, it defaults to the picker selector	when set to true, it attaches all as child processes

[ono-max]

@ikhsan

Thank you for your work! Sorry, I'm not familiar with multiple process debugging. Can you please give me the sample project to experiment the behavior?

[ikhsan]

@ono-max sure thing. I've created the demo app here: https://github.com/ikhsan/attach-multi-socket

Sorry, I'm not familiar with multiple process debugging.

The setup for multi process is here: https://github.com/ikhsan/attach-multi-socket/commit/7e65b1d57e27fa37d2c389a213886cb5824844a4. This is copied from our original app.

Steps

• Copy and run the demo app, $ bundle install then $ bin/rails s
• Run the extension with this branch, open the demo app
• Without multi attach
  • Attach the app by clicking "Attach with rdbg"
  • The picker is shown (e.g. we need to pick one by one, bad dev experience)
• With turning multi-attach
  • Enable the flag https://github.com/ikhsan/attach-multi-socket/blob/7e65b1d57e27fa37d2c389a213886cb5824844a4/.vscode/launch.json#L12-L13
  • Attach the app again by re-clicking "Attach with rdbg"
  • All process are automatically attached
  • Turn the breakpoint on the endpoint https://github.com/ikhsan/attach-multi-socket/blob/7e65b1d57e27fa37d2c389a213886cb5824844a4/app/controllers/debug_controller.rb#L3
  • Visit http://localhost:3000/debug/
  • Stopped at the breakpoint as normal

Let me know if the demo does or doesn't work 🙏

[ikhsan]

Thank you for your work! Sorry, I'm not familiar with multiple process debugging. Can you please give me the sample project to experiment the behavior?

Hey @ono-max 👋 just want to touch point with you on this. Did you have the chance to try debugging with the demo app?