Delete version folder when installing canceled

HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/TaskExecutorDialogWizardDisplayer.java

@@ -68,6 +68,8 @@ public interface TaskExecutorDialogWizardDisplayer extends AbstractWizardDisplay
 
                 @Override
                 public void onTerminate() {
+                    if (e.getLastException() == null)
+                        return;
                     String appendix = StringUtils.getStackTrace(e.getLastException());
                     if (settings.containsKey("failure_message") && settings.get("failure_message") instanceof String)
                         JFXUtilities.runInFX(() -> Controllers.dialog(appendix, (String) settings.get("failure_message"), MessageBox.ERROR_MESSAGE, () -> Controllers.navigate(null)));

HMCLCore/src/main/java/org/jackhuang/hmcl/download/DefaultGameBuilder.java

@@ -25,6 +25,7 @@ import org.jackhuang.hmcl.util.AutoTypingMap;
 import org.jackhuang.hmcl.util.Constants;
 import org.jackhuang.hmcl.util.ExceptionalFunction;
 
+import java.io.IOException;
 import java.util.function.Function;
 
 /**
@@ -69,6 +70,12 @@ public class DefaultGameBuilder extends GameBuilder {
             if (toolVersions.containsKey("optifine"))
                 result = result.then(libraryTaskHelper(gameVersion, "optifine"));
             return result;
+        }).finalized(new Task() {
+            @Override
+            public void execute() {
+                if (!isDependentsSucceeded())
+                    dependencyManager.getGameRepository().getVersionRoot(name).delete();
+            }
         });
     }