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core/src/mindustry/mod/Mods.java

@@ -460,6 +460,7 @@ public class Mods implements Loadable{
             eachEnabled(mod -> {
                 if(mod.root.child("scripts").exists()){
                     content.setCurrentMod(mod);
+                    if(mod.meta.mainScript == null){
                         mod.scripts = mod.root.child("scripts").findAll(f -> f.extension().equals("js"));
                         Log.debug("[{0}] Found {1} scripts.", mod.meta.name, mod.scripts.size);
 
@@ -477,6 +478,20 @@ public class Mods implements Loadable{
                                 break;
                             }
                         }
+                    }else{
+                        Fi file = new Fi(mod.meta.mainscript + ".js");
+                        try{
+                            if(scripts == null){
+                                scripts = platform.createScripts();
+                            }
+                            scripts.run(mod, file);
+                        }catch(Throwable e){
+                            Core.app.post(() -> {
+                                Log.err("Error loading main script {0} for mod {1}.", file.name(), mod.meta.name);
+                                e.printStacktrace();
+                            });
+                        }
+                    }
                 }
             });
         }finally{
@@ -794,7 +809,7 @@ public class Mods implements Loadable{
 
     /** Plugin metadata information.*/
     public static class ModMeta{
-        public String name, displayName, author, description, version, main, minGameVersion;
+        public String name, displayName, author, description, version, main, minGameVersion, mainScript;
         public Array<String> dependencies = Array.with();
         /** Hidden mods are only server-side or client-side, and do not support adding new content. */
         public boolean hidden;