Spring RTS Engine

I'm making a single-player mission and would like to change the buildtree of the commander and construction units.

Is there any way to do this within the startscript?

I know it's possible to build a mutator and make the changes at the mod level, but in the context of a single-player campaign that would mean different mutators for different missions leading to a messy, bloated mods folder.

no.

OK, that's what I figured. Thanks for the prompt response trepan.

in the startscript no.
but in you could do it per map level with LuaGaia or you could detect somehow the campaign level in LuaRules, so you don't need different mods/mutators.

or you could release a SP version of the mod along with your missions in which you have changed the build menus

Easy. Multiple 'clone' units.

Lets say you have three missions, with three different build trees for each.
Just have 3 commander/builder/whatever units, each identical save for the buildtree!

I hadn't thought of cloning units within the mod. But since it seems to be the path of least resistance, that's what I'm going to use, atleast for now.

One of the reasons I was considering using mutators was that with them I could have NTAI load mission specific configs. Then I would have a certain amount of control over enemy behaviour without having to use lots of scripted events.

mutators would also allow the new lua gadget methods of building missions as well as gaia scripts.

Lua gadgets can modify build menus.