Custom service with hot-reload on code change

[Ylannl]

I'm not sure if this falls within the scope of this project, but I would like to have a custom service that runs my app's development server with hot reload (eg. on a code change inside the repository, the server automatically reloads). It would be nice to have this also running inside the process-compose TUI.

I managed to setup my app's development server with services-flake, but the hot-reload doesn't work because it runs on a copy of the code in the nix store. Is there perhaps a reasonably elegant way to restart/rebuild my custom service derivation on a code change? Any tips or suggestions are welcome.

[adrian-gierakowski]

You simply need to put the dev server command into services command and make sure the CWD is set as needed so that it runs from source in the repo

[Ylannl]

Brilliant, thank you! And how did I not try that...

Snippet for future reference:

settings.processes.frontend {
    working_dir = "./frontend";
    command = "${pkgs.bun}/bin/bun run dev";
    ...
}