Work around the fact that our mixins may be loaded before Optifabric

src/main/java/com/replaymod/core/ReplayModMMLauncher.java

@@ -0,0 +1,21 @@
+//#if FABRIC>=1
+package com.replaymod.core;
+
+import org.spongepowered.asm.mixin.Mixins;
+
+// We need to wait for MM to call us, otherwise we might initialize our mixins before it calls optifabric which would
+// result in OF classes not existing while our mixins get resolved.
+public class ReplayModMMLauncher implements Runnable {
+    @Override
+    public void run() {
+        Mixins.addConfiguration("mixins.compat.mapwriter.replaymod.json");
+        Mixins.addConfiguration("mixins.compat.shaders.replaymod.json");
+        Mixins.addConfiguration("mixins.core.replaymod.json");
+        Mixins.addConfiguration("mixins.extras.playeroverview.replaymod.json");
+        Mixins.addConfiguration("mixins.recording.replaymod.json");
+        Mixins.addConfiguration("mixins.render.blend.replaymod.json");
+        Mixins.addConfiguration("mixins.render.replaymod.json");
+        Mixins.addConfiguration("mixins.replay.replaymod.json");
+    }
+}
+//#endif

src/main/java/com/replaymod/core/ReplayModNonMMLauncher.java

@@ -0,0 +1,62 @@
+//#if FABRIC>=1
+package com.replaymod.core;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.objectweb.asm.tree.ClassNode;
+import org.spongepowered.asm.mixin.extensibility.IMixinConfigPlugin;
+import org.spongepowered.asm.mixin.extensibility.IMixinInfo;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Set;
+
+// See ReplayModMMLauncher. This is the fallback if MM is not installed.
+public class ReplayModNonMMLauncher implements IMixinConfigPlugin {
+    private final Logger logger = LogManager.getLogger("replaymod/nonmm");
+
+    @Override
+    public void onLoad(String mixinPackage) {
+    }
+
+    @Override
+    public String getRefMapperConfig() {
+        return null;
+    }
+
+    @Override
+    public boolean shouldApplyMixin(String targetClassName, String mixinClassName) {
+        return false;
+    }
+
+    @Override
+    public void acceptTargets(Set<String> myTargets, Set<String> otherTargets) {
+
+    }
+
+    @Override
+    public List<String> getMixins() {
+        try {
+            if (ReplayModMixinConfigPlugin.hasClass("com.chocohead.mm.Plugin")) {
+                logger.info("Detected MM, they should call us...");
+            } else {
+                logger.info("Did not detect MM, initializing ourselves...");
+                new ReplayModMMLauncher().run();
+            }
+            return null;
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Override
+    public void preApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {
+
+    }
+
+    @Override
+    public void postApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {
+
+    }
+}
+//#endif

src/main/resources/fabric.mod.json

@@ -24,17 +24,14 @@
     ],
     "modmenu": [
       "com.replaymod.core.gui.ModMenuApiImpl"
+    ],
+    "mm:early_risers": [
+      "com.replaymod.core.ReplayModMMLauncher"
     ]
   },
   "mixins": [
     "mixins.jgui.json",
-    "mixins.core.replaymod.json",
-    "mixins.compat.shaders.replaymod.json",
-    "mixins.extras.playeroverview.replaymod.json",
-    "mixins.recording.replaymod.json",
-    "mixins.render.blend.replaymod.json",
-    "mixins.render.replaymod.json",
-    "mixins.replay.replaymod.json"
+    "mixins.nonmmlauncher.replaymod.json"
   ],
 
   "requires": {

src/main/resources/mixins.nonmmlauncher.replaymod.json

@@ -0,0 +1,11 @@
+{
+  "required": true,
+  "package": "com.replaymod.mmdummy",
+  "plugin": "com.replaymod.core.ReplayModNonMMLauncher",
+  "mixins": [],
+  "server": [],
+  "client": [],
+  "compatibilityLevel": "JAVA_8",
+  "minVersion": "0.6.11",
+  "refmap": "mixins.nonmmlauncher.replaymod.refmap.json"
+}