How to search for a string in files with Ant (make sure certain string isn't found in source files)

Question

I\'d like to search for a string within my source files with Ant. (I\'d like my build to fail in case certain string is found within my source files).

So, I should b

Answer 1

This was very helpful as a start, but I have a list of strings which should be checked in a fileset.

My current code sofar is:

That works well, but how to expand that so the ${search4} is read from a list. Actually the list can be read from a file containing each search item is on a separate line.