SceneSwitcher | An automated scene switcher for OBS Studio

Over the past few days I've been tearing what's left of my hair out trying to get to the Holy Grail: Gradle + Java 11 + JavaFX + writing all my app and testing code in Groovy, not Java.

One of several problems is that Groovy 2 (even Groovy 3) can't yet cope with Java 9+ modules, which rules one clever solution out.

But I have managed to get a Gradle project together which not only does virtually everything successfully, including the "run" task (from the "application" plugin), and runs tests using TestFX! This is indeed using Java 11, Groovy 2.5.9, JavaFX 13, etc.

It will even execute the task "installdist" (when included in build.gradle). That produces an executable with a "lib" directory full of all the jars you need to run independently (like task "assemble", only not compressed).

The trouble is, when I execute that executable I get the by now classic "Error: JavaFX runtime components are missing, and are required to run this application". Still confused why that happens, as the directory [project dir]/build/install/GradleExp/lib does indeed contain no fewer than 7 JavaFX .jars.

I think I've exhausted what I can do trying to configure Gradle conventionally: given that I'm using Groovy for app and testing code I don't think it's possible to configure the Gradle project to get "installdist" to produce a ready-to-run JavaFX-enabled executable. But... is there something I can do after having produced this, like some command I could run that would somehow bring in the JavaFX files and link them in? Even if this involves linking inelegantly to some JavaFX jar file(s) or locations?

Or maybe I could use the executable sh script file generated by the "build" task under .../build/scripts ? This ropes in the above-mentioned 7 JavaFX .jar files at the start when defining the CLASSPATH: