can we pass in header variables as CLI parameters?

[Ian Ring]

Hi, sorry if this has been asked before...

Is it possible to pass in header variables in via the CLI?

For example, I would like to pass the copyright date in via a parameter, instead of it being saved in the .LY file.

This can be done in LaTeX, so I hope there is a way to do something similar in lilypond.

Cheers
Ian