Test across java and gradle versions with github actions. (#218)

* Experiment with github actions

* Fix?

* another fix

* Fix?

* Change github actions run args

* Tried and tested is better right?

* spaces spaces spaces

* revert

* info

* Just 4.9

* Fixes to support building on newer gradle versions

* Forward log output and run tests on runtime gradle version

* Remove travis

* De-duplicate

* Remove daily action, doesnt seem to work so well.

src/main/java/net/fabricmc/loom/task/AbstractLoomTask.java

@@ -25,6 +25,7 @@
 package net.fabricmc.loom.task;
 
 import org.gradle.api.DefaultTask;
+import org.gradle.api.tasks.Internal;
 
 import net.fabricmc.loom.LoomGradleExtension;
 
@@ -33,6 +34,7 @@ public abstract class AbstractLoomTask extends DefaultTask {
 		setGroup("fabric");
 	}
 
+	@Internal
 	protected LoomGradleExtension getExtension() {
 		return getProject().getExtensions().getByType(LoomGradleExtension.class);
 	}

src/main/java/net/fabricmc/loom/util/GradleSupport.java

@@ -24,12 +24,10 @@
 
 package net.fabricmc.loom.util;
 
-import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 
 import org.gradle.api.Project;
 import org.gradle.api.file.RegularFileProperty;
-import org.gradle.api.model.ObjectFactory;
 
 //This is used to bridge the gap over large gradle api changes.
 public class GradleSupport {
@@ -41,17 +39,24 @@ public class GradleSupport {
 			//Nope
 		}
 
-		return getfilePropertyLegacy(project);
+		try {
+			return getfilePropertyLegacy(project);
+		} catch (Exception e) {
+			throw new RuntimeException("Failed to find file property", e);
+		}
 	}
 
-	private static RegularFileProperty getfilePropertyModern(Project project) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
-		ObjectFactory objectFactory = project.getObjects();
-		Method method = objectFactory.getClass().getDeclaredMethod("fileProperty");
+	private static RegularFileProperty getfilePropertyModern(Project project) throws Exception {
+		return getfilePropertyLegacyFromObject(project.getObjects());
+	}
+
+	private static RegularFileProperty getfilePropertyLegacy(Project project) throws Exception {
+		return getfilePropertyLegacyFromObject(project.getLayout());
+	}
+
+	private static RegularFileProperty getfilePropertyLegacyFromObject(Object object) throws Exception {
+		Method method = object.getClass().getDeclaredMethod("fileProperty");
 		method.setAccessible(true);
-		return (RegularFileProperty) method.invoke(objectFactory);
-	}
-
-	private static RegularFileProperty getfilePropertyLegacy(Project project) {
-		return project.getLayout().fileProperty();
+		return (RegularFileProperty) method.invoke(object);
 	}
 }