From ac8087f1c756ed263383e7db3b249f958d04521c Mon Sep 17 00:00:00 2001
From: modmuss50 <modmuss50@gmail.com>
Date: Sun, 23 Oct 2016 18:47:06 +0100
Subject: [PATCH] Add null check to refmap location

---
 src/main/java/net/fabricmc/loom/AbstractPlugin.java | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/main/java/net/fabricmc/loom/AbstractPlugin.java b/src/main/java/net/fabricmc/loom/AbstractPlugin.java
index 9b3b26f..500a910 100644
--- a/src/main/java/net/fabricmc/loom/AbstractPlugin.java
+++ b/src/main/java/net/fabricmc/loom/AbstractPlugin.java
@@ -105,6 +105,10 @@ public class AbstractPlugin implements Plugin<Project> {
 
 							javaCompileTask.getOptions().getCompilerArgs().add("-AinMapFilePomfMojang=" + Constants.MAPPINGS_TINY.get(extension).getCanonicalPath());
 							javaCompileTask.getOptions().getCompilerArgs().add("-AoutMapFilePomfMojang=" + Constants.MAPPINGS_MIXIN_EXPORT.get(extension).getCanonicalPath());
+							if(extension.refmapName == null || extension.refmapName.isEmpty()){
+								project.getLogger().error("Could not find refmap definition, will be using default name: " + project.getName() + "-refmap.json");
+								extension.refmapName = project.getName() + "-refmap.json";
+							}
 							javaCompileTask.getOptions().getCompilerArgs().add("-AoutRefMapFile=" + new File(javaCompileTask.getDestinationDir(), extension.refmapName).getCanonicalPath());
 						} catch (IOException e) {
 							e.printStackTrace();