I'm ignoring the build directory using the following contents matching pattern in my project settings
It would be nice if AckMate could _ack_knowledge that. Right now "Using TextMate folder references" only respects the application settings for folder references.
I wish I could... TextMate's author has stated that there's no way for me to access the per-project folder references setting from a plugin.
Too bad. The pattern is stored in the project file tough. My guess is that you can't get access to the project file. No API for that?
I guess in that case I just add build to my global ignore. It's good enough.