PaperMC/nms-patches/BlockTurtleEgg.patch

--- a/net/minecraft/server/BlockTurtleEgg.java
+++ b/net/minecraft/server/BlockTurtleEgg.java
@@ -3,6 +3,11 @@
 import java.util.Random;
 import javax.annotation.Nullable;
 
+// CraftBukkit start
+import org.bukkit.event.entity.EntityInteractEvent;
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+// CraftBukkit end
+
 public class BlockTurtleEgg extends Block {
 
     private static final VoxelShape c = Block.a(3.0D, 0.0D, 3.0D, 12.0D, 7.0D, 12.0D);
@@ -34,6 +39,20 @@
         if (entity instanceof EntityTurtle) {
             super.stepOn(world, blockposition, entity);
         } else {
+            // CraftBukkit start - Step on eggs
+            org.bukkit.event.Cancellable cancellable;
+            if (entity instanceof EntityHuman) {
+                cancellable = CraftEventFactory.callPlayerInteractEvent((EntityHuman) entity, org.bukkit.event.block.Action.PHYSICAL, blockposition, null, null, null);
+            } else {
+                cancellable = new EntityInteractEvent(entity.getBukkitEntity(), world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ()));
+                world.getServer().getPluginManager().callEvent((EntityInteractEvent) cancellable);
+            }
+
+            if (cancellable.isCancelled()) {
+                return;
+            }
+            // CraftBukkit end
+
             if (!world.isClientSide && world.random.nextInt(i) == 0) {
                 this.a(world, blockposition, iblockdata);
             }
@@ -72,7 +91,7 @@
                         entityturtle.setAgeRaw(-24000);
                         entityturtle.g(blockposition);
                         entityturtle.setPositionRotation((double) blockposition.getX() + 0.3D + (double) j * 0.2D, (double) blockposition.getY(), (double) blockposition.getZ() + 0.3D, 0.0F, 0.0F);
-                        world.addEntity(entityturtle);
+                        world.addEntity(entityturtle, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.EGG); // CraftBukkit
                     }
                 }
             }