Way to split/organize the system definition?

[LeCalicot]

I'm pretty new to bevy and rust, so maybe I'm missing something obvious.

For the sake readability, I would like to gather some of the system calls together to reduce the number of calls chained together.

So, schematically, going from something like:
App::build().add_system(my_system_1).add_system(my_system_2).add_system(my_system_3).run()

To:
App::build().call_sys_1_2_3().run()
where the function call_sys_1_2_3 would be defined somewhere else. I could then group system that are interacting together.

What's the easiest way to achieve that ? I tried defining function for that but I had trouble with the type of the argument and return.
I imagine it could be possible using a macro...?

[afonsolage]

Maybe you are looking for Plugins?

[alice-i-cecile]

Plugins would be my first preference here. System sets also work quite well :)

[LeCalicot]

Ah. Oh. Indeed.

I will look into that but it seems to do what I had in mind.

[afonsolage]

If this is the correct answer, feel free to mark it as answered, so future folks can also check it 😃