Need Target build automatically based only on the checkin's

Hi,

Scenario: I'm successful in taking complete build as scheduled, and manually 
invoking the Target builds whenever required. I have more than 350 targets in 
my build.xml and have many dependencies between them.


Requirement: Looking out only for the target build automatically whenever the 
checkin is particular to the target and I have scheduled the complete build 
(forced)on a daily basis irrespective of the target builds.


Regards,
Mehar


------------------------------------------------------------------------------