Forge works now too, and so does forge+liteloader

logic/BaseInstaller.h

@@ -0,0 +1,39 @@
+/* Copyright 2013 MultiMC Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <memory>
+
+class DerpInstance;
+class QDir;
+class QString;
+
+class BaseInstaller
+{
+public:
+	BaseInstaller();
+
+	virtual bool canApply(DerpInstance *instance) const { return true; }
+	bool isApplied(DerpInstance *on);
+
+	virtual bool add(DerpInstance *to);
+	virtual bool remove(DerpInstance *from);
+
+protected:
+	virtual QString id() const = 0;
+	QString filename(const QString &root) const;
+	QDir patchesDir(const QString &root) const;
+};