craftbukkit/nms-patches/net/minecraft/world/entity/EntityLightning.patch

--- a/net/minecraft/world/entity/EntityLightning.java
+++ b/net/minecraft/world/entity/EntityLightning.java
@@ -29,6 +29,11 @@
 import net.minecraft.world.phys.AxisAlignedBB;
 import net.minecraft.world.phys.Vec3D;
 
+// CraftBukkit start
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+import org.bukkit.event.entity.EntityRemoveEvent;
+// CraftBukkit end
+
 public class EntityLightning extends Entity {
 
     private static final int START_LIFE = 2;
@@ -112,7 +117,7 @@
                     }
                 }
 
-                this.discard();
+                this.discard(EntityRemoveEvent.Cause.DESPAWN); // CraftBukkit - add Bukkit remove cause
             } else if (this.life < -this.random.nextInt(10)) {
                 --this.flashes;
                 this.life = 1;
@@ -121,7 +126,7 @@
             }
         }
 
-        if (this.life >= 0) {
+        if (this.life >= 0 && !this.visualOnly) { // CraftBukkit - add !this.visualOnly
             if (!(this.level() instanceof WorldServer)) {
                 this.level().setSkyFlashTime(2);
             } else if (!this.visualOnly) {
@@ -158,8 +163,12 @@
                     IBlockData iblockdata = BlockFireAbstract.getState(this.level(), blockposition);
 
                     if (this.level().getBlockState(blockposition).isAir() && iblockdata.canSurvive(this.level(), blockposition)) {
-                        this.level().setBlockAndUpdate(blockposition, iblockdata);
-                        ++this.blocksSetOnFire;
+                        // CraftBukkit start - add "!visualOnly"
+                        if (!visualOnly && !CraftEventFactory.callBlockIgniteEvent(this.level(), blockposition, this).isCancelled()) {
+                            this.level().setBlockAndUpdate(blockposition, iblockdata);
+                            ++this.blocksSetOnFire;
+                        }
+                        // CraftBukkit end
                     }
 
                     for (int j = 0; j < i; ++j) {
@@ -167,8 +176,12 @@
 
                         iblockdata = BlockFireAbstract.getState(this.level(), blockposition1);
                         if (this.level().getBlockState(blockposition1).isAir() && iblockdata.canSurvive(this.level(), blockposition1)) {
-                            this.level().setBlockAndUpdate(blockposition1, iblockdata);
-                            ++this.blocksSetOnFire;
+                            // CraftBukkit start - add "!visualOnly"
+                            if (!visualOnly && !CraftEventFactory.callBlockIgniteEvent(this.level(), blockposition1, this).isCancelled()) {
+                                this.level().setBlockAndUpdate(blockposition1, iblockdata);
+                                ++this.blocksSetOnFire;
+                            }
+                            // CraftBukkit end
                         }
                     }