Paper/nms-patches/BlockMinecartDetector.patch

--- ../work/decompile-bb26c12b/net/minecraft/server/BlockMinecartDetector.java	2014-11-27 08:59:46.541422551 +1100
+++ src/main/java/net/minecraft/server/BlockMinecartDetector.java	2014-11-27 08:42:10.124850965 +1100
@@ -4,6 +4,8 @@
 import java.util.List;
 import java.util.Random;
 
+import org.bukkit.event.block.BlockRedstoneEvent; // CraftBukkit
+
 public class BlockMinecartDetector extends BlockMinecartTrackAbstract {
 
     public static final BlockStateEnum SHAPE = BlockStateEnum.a("shape", EnumTrackPosition.class, (Predicate) (new BlockMinecartDetectorInnerClass1()));
@@ -55,6 +57,17 @@
         if (!list.isEmpty()) {
             flag1 = true;
         }
+        
+       // CraftBukkit start
+        if (flag != flag1) {
+            org.bukkit.block.Block block = world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ());
+
+            BlockRedstoneEvent eventRedstone = new BlockRedstoneEvent(block, flag ? 15 : 0, flag1 ? 15 : 0);
+            world.getServer().getPluginManager().callEvent(eventRedstone);
+
+            flag1 = eventRedstone.getNewCurrent() > 0;
+        }
+        // CraftBukkit end
 
         if (flag1 && !flag) {
             world.setTypeAndData(blockposition, iblockdata.set(BlockMinecartDetector.POWERED, Boolean.valueOf(true)), 3);