PaperMC/nms-patches/EntityPig.patch

--- a/net/minecraft/server/EntityPig.java
+++ b/net/minecraft/server/EntityPig.java
@@ -4,6 +4,8 @@
 import java.util.Iterator;
 import java.util.Set;
 
+import org.bukkit.craftbukkit.event.CraftEventFactory; // CraftBukkit
+
 public class EntityPig extends EntityAnimal {
 
     private static final DataWatcherObject<Boolean> bv = DataWatcher.a(EntityPig.class, DataWatcherRegistry.h);
@@ -130,6 +132,12 @@
         if (!this.world.isClientSide && !this.dead) {
             EntityPigZombie entitypigzombie = new EntityPigZombie(this.world);
 
+            // CraftBukkit start
+            if (CraftEventFactory.callPigZapEvent(this, entitylightning, entitypigzombie).isCancelled()) {
+                return;
+            }
+            // CraftBukkit end
+
             entitypigzombie.setSlot(EnumItemSlot.MAINHAND, new ItemStack(Items.GOLDEN_SWORD));
             entitypigzombie.setPositionRotation(this.locX, this.locY, this.locZ, this.yaw, this.pitch);
             entitypigzombie.m(this.cR());
@@ -138,7 +146,8 @@
                 entitypigzombie.setCustomNameVisible(this.getCustomNameVisible());
             }
 
-            this.world.addEntity(entitypigzombie);
+            // CraftBukkit - added a reason for spawning this creature
+            this.world.addEntity(entitypigzombie, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.LIGHTNING);
             this.die();
         }
     }