Is there a way to launch multiple instances with different parameters or environment variables?

[vagrant river]

I'm trying to figure out if there's a way to launch 3 instances, (one server and two clients), by changing the arguments or environment variables passed to the multiple instances. Currently the 3 instances all launch the same way and I can't think of a way to differentiate them or coordinate which one becomes the server.

[vagrant river]

https://github.com/godotengine/godot-proposals/issues/522

[wild spruce]

Interesting puzzle

[wild spruce]

I wonder when running those 3 instances they all get https://docs.godotengine.org/en/stable/classes/class_os.html#class-os-method-get-cmdline-args including the debug port? ... If so 1 has the lowest port num. Could they share this info? 🤔

[vagrant river]

I thought I wasn't seeing any of those additional debug args in this list. but I could double check when I get a chance

ah, perhaps I was using get_cmdline_user_args(). not sure. will check later on

[wild spruce]

I just tested this ... arguments are empty. But

printt('PID', OS.get_process_id())

It gets ugly but using (on MacOS)

printt('PID', OS.get_process_id())
var output = []
var exit_code = OS.execute("ps", ["-aef"], output)
var txt = output[0].split('\n')
for t in txt:
    var tt:String = t
    if tt.contains('Godot'):
        printt(t)

You can find the others PID and do your thing?

[vagrant river]

hmmmm

I think it would be better to (carefully) have all of them attempt to be a server, and if the port is in use, just switch to client mode.

Yeah, that actually works well. The only problem that remains is that there's an error printed to the log every time, which I'd have to ignore

E 0:00:01:0674 lobby.gd:116 @ _init_server(): Couldn't create an ENet host. <C++ Error> Condition "!host" is true. Returning: ERR_CANT_CREATE <C++ Source> modules/enet/enet_connection.cpp:318 @ _create() <Stack Trace> lobby.gd:116 @ _init_server() lobby.gd:97 @ initialize() lobby.gd:70 @ _ready()

wish there was a way to suppress this.