Add parameter to set the brokers via a command

[harmathy]

This allows for using a script to determine the brokers list, e. g. in a CI environment.

[plicease]

Is there a reason to use this over say --brokers=$(command)?

[harmathy]

Yes, it makes setting brokers dynamically in CI environments much easier.

[plicease]

Yes, it makes setting brokers dynamically in CI environments much easier.

Right, but my question is can't you do the same thing with bash command interpolation --brokers=$(command -args foo bar whatever)

[harmathy]

This only works in environments, which run inside a shell. I can imagine a lot of use cases, where this could be useful: If you run this within a systemd unit, there is no shell for shell expansion. Or if it called by a Python program or if you call it in your IDE. If you want your container images to be small, there might be no shell at all.