PluginSide from AssemblyMetadataAttribute

Reactor/Networking/ModList.cs

@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 using System.Linq;
-using System.Reflection;
 using BepInEx.IL2CPP;
 
 namespace Reactor.Networking
@@ -32,7 +31,7 @@ namespace Reactor.Networking
                     i++,
                     plugin.Metadata.GUID,
                     plugin.Metadata.Version.Clean(),
-                    plugin.Instance.GetType().GetCustomAttribute<ReactorPluginSideAttribute>()?.Side ?? PluginSide.Both
+                    ReactorPluginSideAttribute.GetPluginSide(plugin.Instance.GetType())
                 ))
                 .ToHashSet();
 

Reactor/ReactorPluginSideAttribute.cs

@@ -1,4 +1,6 @@
 using System;
+using System.Linq;
+using System.Reflection;
 
 namespace Reactor
 {
@@ -14,5 +16,22 @@ namespace Reactor
         {
             Side = side;
         }
+
+        public static PluginSide GetPluginSide(Type type)
+        {
+            var attribute = type.GetCustomAttribute<ReactorPluginSideAttribute>();
+            if (attribute != null)
+            {
+                return attribute.Side;
+            }
+
+            var metadataAttribute = type.Assembly.GetCustomAttributes<AssemblyMetadataAttribute>().SingleOrDefault(x => x.Key == "Reactor.PluginSide");
+            if (metadataAttribute != null)
+            {
+                return Enum.Parse<PluginSide>(metadataAttribute.Value, true);
+            }
+
+            return PluginSide.Both;
+        }
     }
 }