Creating an action

[Smoo]

Howdy. Never modded this (or any) game before, but decided to get my feet wet this time. I'm just having trouble deciphering where the info is that I need. I've waded through most of the XML files and started poking my head into Lua files but so far haven't found what I'm looking for.

I'd like to add a Sentry action for units. As far as I can tell, I'm not asking the game to do anything it doesn't already know how to do... the game knows how to sleep a unit, and it knows how to cancel a unit's action when enemies are within range (as it cancels a Go To extended movement), I just don't know how to find references to those behaviors and how to combine them into a new action.

Can anyone at least point me to the right part of the file structure to start sorting this out? TIA.

 

[Smoo]

If I'm understanding things right, I will eventually need to add an entry to UnitOperations.xml, but from what i can tell that file just contains refrence information that can be referred to by other things (like whatever generates the action selection choices), and I may need the entry for Sleep in there to incorporate into Sentry... I've no idea where I'd find reference to a "wake when enemy near" or similar behavior. Would that be in the source code somwhere? Should I wait for the SDK?