Resolve warnings when building NetLogo

[EwoutH]

Currently there are 4 warnings emitted when building NetLogo:

• Link

  [info] compiling 1188 Scala sources and 412 Java sources to /home/runner/work/NetLogo/NetLogo/netlogo-gui/target/classes ...
  [info] done compiling
  [warn] Could not determine source for class org.nlogo.render.Renderer
  

• Link

  [info] compiling 158 Scala sources to /home/runner/work/NetLogo/NetLogo/netlogo-gui/target/test-classes ...
  [info] done compiling
  [warn] multiple main classes detected: run 'show discoveredMainClasses' to see the list
  

• Link

  [info] compiling 94 Java sources to /home/runner/work/NetLogo/NetLogo/extensions/gis/target/scala-2.12/classes ...
  [info] done compiling
  [warn] multiple main classes detected: run 'show discoveredMainClasses' to see the list
  

• Link

  [info] compiling 12 Java sources to /home/runner/work/NetLogo/NetLogo/extensions/r/target/scala-2.12/classes ...
  [info] done compiling
  [warn] multiple main classes detected: run 'show discoveredMainClasses' to see the list
  

[brandesNW]

Thanks for creating an issue for this.
I don't know if there is a simple solution for this.

We have 2 Renderer classes used with the GUI. The gl one is used with JOGL to create ThreeD views.
./netlogo-gui/src/main/render/Renderer.java:public class Renderer
./netlogo-gui/src/main/gl/render/Renderer.java:public class Renderer

The appropriate one cannot be determined at compile time.

similarly if you get the multiple main message and run 'show discoveredMainClasses' to see the list I think a similar situation holds.

I know we have

/netlogo-gui/src/main/swing/TextFieldBox.java: public static void main(String[] argv) {
./mac-app/src/main/java/org/nlogo/app/MacApplication.java: public static void main(String[] args) {

[SethTisue]

I suspect that setting mainClass would avoid the warning.