Non-native process managers not stopping processes/services

[tmarkanov]

Describe the bug

I'm trying to use alternative process managers (process-compose/mprocs), but they do not stop processes and services on exit. I was able to reproduce this in a minimal example with process-compose while running only the Redis service, but in my project I had the same issue with other services (postgres, rabbitmq), as well as custom processes (e.g. Rails server).

To reproduce

1. Install latest devenv: nix profile install --accept-flake-config github:cachix/devenv/latest
2. In an empty dir, run devenv init
3. Change process manager to process-compose, and enable Redis service (gist)
4. Enter devenv shell and run devenv up - the Redis service starts normally
5. Exit process-compose (Ctrl+C)
6. Observe running processes (e.g. Activity Monitor): the redis-server process does not stop as expected

A similar issue happens if I try to restart the process in process-compose:

Warning: Could not create server TCP listening socket 127.0.0.1:6380: bind: Address already in use                                                                            
Failed listening on port 6380 (tcp), aborting.

I observed similar behaviour when using mprocs, but it does not happen with the native process manager.

Version

devenv 2.0.3+9e5c17c (aarch64-darwin)

Side note
The reason for me wanting to use another process manager is that I would like to be able to use one of my custom processes interactively, which process-compose and mprocs support, theoretically.
Are there any plans to add such functionality to the native process manager in the future?

[sandydoo]

mprocs is known to be broken and we haven't been able to configure it to reliably restart processes.

process-compose should work though and that needs to be investigated.

[clotodex]

Using process-compose here, and while process-compose is not able to shut down processes with a custom shut down command.
Was working before upgrade to 2.x
Processes without a custom shutdown command work