ForgePatch/patches/minecraft/net/minecraft/data/DataGenerator.java.patch

--- a/net/minecraft/data/DataGenerator.java
+++ b/net/minecraft/data/DataGenerator.java
@@ -19,7 +19,7 @@
 
    public DataGenerator(Path p_i48266_1_, Collection<Path> p_i48266_2_) {
       this.field_200395_c = p_i48266_1_;
-      this.field_200394_b = p_i48266_2_;
+      this.field_200394_b = Lists.newArrayList(p_i48266_2_);
    }
 
    public Collection<Path> func_200389_a() {
@@ -38,6 +38,7 @@
 
       for(IDataProvider idataprovider : this.field_200396_d) {
          field_200393_a.info("Starting provider: {}", (Object)idataprovider.func_200397_b());
+         net.minecraftforge.fml.StartupMessageManager.addModMessage("Generating: " + idataprovider.func_200397_b());
          stopwatch1.start();
          idataprovider.func_200398_a(directorycache);
          stopwatch1.stop();
@@ -53,6 +54,10 @@
       this.field_200396_d.add(p_200390_1_);
    }
 
+   public void addInput(Path value) {
+      this.field_200394_b.add(value);
+   }
+
    static {
       Bootstrap.func_151354_b();
    }