Criando um `.jar` copiado e compilando-o com TC

CompileApp.java

package br.com.softsite.streamsupport;

...

import java.io.Closeable;
import java.io.IOException;
import java.util.function.Supplier;

import com.totalcross.util.compile.CompilationBuilder;

import totalcross.io.File;
import totalcross.ui.MainWindow;
import totalcross.util.IOUtils;
import totalcross.util.concurrent.Lock;

...

public class CompileApp {

	...
	
	public void geraBuild() throws IOException, InterruptedException {
		String tcKey = <My Key>;
		String tcHome = <TC Home>;
		
		Class<? extends MainWindow> mainWindowClass = App.class;
		try (Closeable c = createCopiedJar(mainWindowClass)) {
			new CompilationBuilder()
				.setKey(tcKey)
				.setTotalCrossHome(tcHome)
				.setPlatformsTarget(AvailablePlatforms.WIN32)
				.setMustCompile(s -> s.contains("totalcross-functional-toolbox"))
				.setMainTarget(App.class)
				.singlePackage()
				.build();
		}
	}

	private Closeable createCopiedJar(Class<? extends MainWindow> mainWindowClass) throws IOException {
		String origName = s.get();
		String destinyName = getNameMainWindow(mainWindowClass);
		
		if (origName.equals(destinyName)) {
			return () -> {};
		}
		try {
			try (
					File orig = new File(s.get(), File.READ_ONLY);
					File destiny = new File(destinyName, File.CREATE_EMPTY);
					){
				IOUtils.copy(orig.asInputStream(), destiny.asOutputStream(), 2048);
			} catch (totalcross.io.IOException e) {
				try (File f = new File(destinyName)) {
					f.delete();
				}
				throw new IOException(e);
			} catch (IOException e) {
				try (File f = new File(destinyName)) {
					f.delete();
				}
				throw e;
			}
		} catch (totalcross.io.IOException e) {
			throw new IOException(e);
		}
		
		return () -> {
			try (File f = new File(destinyName)) {
				f.delete();
			} catch (totalcross.io.IOException e) {
				throw new IOException(e);
			}
		};
	}

	private String cleanedName(Class<? extends MainWindow> mainWindowClass) {
		return mainWindowClass.getName().replaceAll("^.*\\.", "");
	}

	private String getNameMainWindow(Class<? extends MainWindow> mainWindowClass) {
		return "target/" + cleanedName(mainWindowClass) + ".jar";
	}
	
	private Lock lock = new Lock();
	
	private String jarPath = null;
	private Supplier<String> s = () -> {
		synchronized (lock) {
			if (jarPath == null) {
				jarPath = "target/<maven-generated-name>.jar"; // se desejar, pode derivar esse valor programaticamente também
				s = () -> jarPath;
			}
			return jarPath;
		}
	};