=================
This is quick and dirty app - was created in like 10-20 minutes. Don't expect code quality here.
On my machine, iReport designer was failing to recompile .jrxml files, even when the versions of it and the jasper dependency were matched. I didn't want to find solution for that one online as error messages were cryptic, so this simple tool makes it a bit easier.
Just change the dependency for jasper reports in the gradle file to proper one, run gradle fatJar and produced jar can be used like this:
java -jar jasper-reports.jar /path/to/dir/containing/jrxml