How to determine the previous revision number?

[Dickson, Craig]

I am trying to customize some change reports we generate using the CVS tools available in Ant - which basically means I can execute any arbitrary CVS command line.

 

The reports can already determine what revisions of each file were committed between 2 dates - using a log command. What I would like to do is report the previous revision number which is not easily obtained from the output from the log command. Is there a way from the log output to determine the previous revision number for any of the revisions committed in the log ouput for a single file? Or alternatively is there a known algorithm, that given a CVS revision number, can determine what the previous revision number was?

 

Not sure if I explained that clearly. :)

 

Thanks