put a plugin-interface version into the meta data of each plugin. don't load plugins that don't match the current version.

libraries/plugins/src/plugins/PluginManager.cpp

@@ -71,6 +71,24 @@ QString getPluginIIDFromMetaData(QJsonObject object) {
     return object[IID_KEY].toString();
 }
 
+int getPluginInterfaceVersionFromMetaData(QJsonObject object) {
+    static const char* METADATA_KEY = "MetaData";
+    static const char* NAME_KEY = "version";
+
+    if (!object.contains(METADATA_KEY) || !object[METADATA_KEY].isObject()) {
+        return 0;
+    }
+
+    auto metaDataObject = object[METADATA_KEY].toObject();
+
+    if (!metaDataObject.contains(NAME_KEY) || !metaDataObject[NAME_KEY].isDouble()) {
+        return 0;
+    }
+
+    return (int)(metaDataObject[NAME_KEY].toDouble());
+}
+
+
 QStringList preferredDisplayPlugins;
 QStringList disabledDisplays;
 QStringList disabledInputs;
@@ -122,7 +140,11 @@ const LoaderList& getLoadedPlugins() {
                     continue;
                 }
 
-                if (loader->load()) {
+                if (getPluginInterfaceVersionFromMetaData(loader->metaData()) != HIFI_PLUGIN_INTERFACE_VERSION) {
+                    qCDebug(plugins) << "Plugin" << qPrintable(plugin) << "interface version doesn't match, not loading:"
+                                     << getPluginInterfaceVersionFromMetaData(loader->metaData())
+                                     << "doesn't match" << HIFI_PLUGIN_INTERFACE_VERSION;
+                } else if (loader->load()) {
                     qCDebug(plugins) << "Plugin" << qPrintable(plugin) << "loaded successfully";
                     loadedPlugins.push_back(loader);
                 } else {

libraries/plugins/src/plugins/PluginManager.h

@@ -61,3 +61,5 @@ private:
     DisplayPluginList _displayPlugins;
     InputPluginList _inputPlugins;
 };
+
+static const int HIFI_PLUGIN_INTERFACE_VERSION = 1;

plugins/hifiCodec/src/plugin.json

@@ -1 +1,4 @@
-{"name":"HiFi 4:1 Audio Codec"}
+{
+    "name":"HiFi 4:1 Audio Codec",
+    "version":1
+}

plugins/hifiKinect/src/plugin.json

@@ -1 +1,4 @@
-{"name":"Kinect"}
+{
+    "name":"Kinect",
+    "version":1
+}

plugins/hifiLeapMotion/src/plugin.json

@@ -1 +1,4 @@
-{"name":"Leap Motion"}
+{
+    "name":"Leap Motion",
+    "version":1
+}

plugins/hifiNeuron/src/plugin.json

@@ -1 +1,4 @@
-{"name":"Neuron"}
+{
+    "name":"Neuron",
+    "version":1
+}

plugins/hifiSdl2/src/plugin.json

@@ -1 +1,4 @@
-{"name":"SDL2"}
+{
+    "name":"SDL2",
+    "version":1
+}

plugins/hifiSixense/src/plugin.json

@@ -1 +1,4 @@
-{"name":"Sixense"}
+{
+    "name":"Sixense",
+    "version":1
+}

plugins/hifiSpacemouse/src/plugin.json

@@ -1 +1,4 @@
-{"name":"Spacemouse"}
+{
+    "name":"Spacemouse",
+    "version":1
+}

plugins/oculus/src/oculus.json

@@ -1 +1,4 @@
-{"name":"Oculus Rift"}
+{
+    "name":"Oculus Rift",
+    "version":1
+}

plugins/oculusLegacy/src/oculus.json

@@ -1 +1,4 @@
-{"name":"Oculus Rift"}
+{
+    "name":"Oculus Rift",
+    "version":1
+}

plugins/openvr/src/plugin.json

@@ -1 +1,4 @@
-{"name":"OpenVR (Vive)"}
+{
+    "name":"OpenVR (Vive)",
+    "version":1
+}

plugins/pcmCodec/src/plugin.json

@@ -1 +1,4 @@
-{"name":"PCM Codec"}
+{
+    "name":"PCM Codec",
+    "version":1
+}

plugins/steamClient/src/plugin.json

@@ -1 +1,4 @@
-{"name":"Steam Client"}
+{
+    "name":"Steam Client",
+    "version":1
+}