Execute a perl script; invoke the local perl client through a java JSR 223 script engine.
Run ./gradlew to create a JAR.
Add JAR to classpath; it will make the script engine discoverable with "perl" as a script engine name. More information here.
The script engine takes a Reader or String which contains the perl file. That perl file will be written to disk and variables will be replaced. After that perl will be executed with the configuration file.
Bindings are used to have variables inside perl scripts.