I'm creating an IzPack installer and want to know how can I debug the installer or some actions using the most automatic tools, it includes generating a debug log with the installer actions and commands executed.
As explained in official documentation there exists some:
-DTRACE=true - allows you to check current state of conditions and variables values (in GUI mode)
-DSTACKTRACE=true - will output complete stacktrace of the exception that caused the installer failure
-DDEBUG=true - debug mode, most informative but kind of hard to read sometimes