Combining triggers

Hello,

When using different build triggers they are combined in an or clause.  For example, if I have set a VCS trigger of +:foo/bar/** and a Dependency on build Master the current behavior is to trigger when either a VCS submission under foo/bar is made OR the Master build completes.  What I want is an AND so that even after Master completes my build would only trigger if there have been changes under foo/bar.

We have one master build which builds binaries that many subsequent builds use.  But I don't want to run every subsequent build if there aren't pertinent changes.

Does this make sense?  Any such feature coming?  Or is there a way to do this that I'm not aware of?  From what I have seen, I believe snapshot dependencies just end up in many more Master builds being triggered and negating any optimization I am hoping to achieve.

Thanks,
Tom