QuPath startup.groovy script that enables per project startup.groovy scripts that can be provided with each project

startup.groovy

/**
 * Run a per project startup script on project load, if the project ships a
 * 'startup.groovy' script in its project scripts directory.
 *
 * @author Andreas Poehlmann
 */
import java.awt.image.BufferedImage
import javafx.beans.value.ChangeListener
import javafx.beans.value.ObservableValue
import qupath.lib.gui.scripting.DefaultScriptEditor
import qupath.lib.gui.QuPathGUI
import qupath.lib.projects.Project
import qupath.lib.projects.ResourceManager

gui = QuPathGUI.getInstance()
gui.projectProperty().addListener(new ChangeListener<Project<BufferedImage>>() {
    @Override
    void changed(ObservableValue<? extends Project<BufferedImage>> observable, Project<BufferedImage> oldProject, Project<BufferedImage> newProject) {
        if (newProject == null) {
            return
        }
        def manager = newProject.getScripts()
        def script
        try {
            script = manager.get('startup')
        } catch (IOException ignored) {
            return
        }
        DefaultScriptEditor.executeScript(DefaultScriptEditor.Language.GROOVY, script, newProject, null, true, null)
    }
})
println("Registered per project 'startup.groovy' handler")