Allow for non-yarn mappings for MigrateMappingsTask (#141)

* Add getExtension utility method to AbstractLoomTask

* Support non-yarn mappings in MigrateMappingsTask

* Fix style

* Assume Yarn mappings if correct notation was not supplied

* Move load mappings block into its own its own method

Also added protected to getExtension on AbstractLoomTask

* Use Option instead of environment variables

* Assume V2 Yarn by default

* Some restructuring

All works the same.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/main/java/net/fabricmc/loom/task/AbstractLoomTask.java b/src/main/java/net/fabricmc/loom/task/AbstractLoomTask.java
index d062e4d2..e62173d1 100644
--- a/src/main/java/net/fabricmc/loom/task/AbstractLoomTask.java
+++ b/src/main/java/net/fabricmc/loom/task/AbstractLoomTask.java
@@ -26,8 +26,14 @@ package net.fabricmc.loom.task;
 
 import org.gradle.api.DefaultTask;
 
+import net.fabricmc.loom.LoomGradleExtension;
+
 public abstract class AbstractLoomTask extends DefaultTask {
 	public AbstractLoomTask() {
 		setGroup("fabric");
 	}
+
+	protected LoomGradleExtension getExtension() {
+		return getProject().getExtensions().getByType(LoomGradleExtension.class);
+	}
 }