Require a DiffConfig when creating a FollowFilter

The various rename detection options are an inherent part of the
filter, similar to the path being followed.

This fixes a potential NPE when a RevWalk with a FollowFilter is
created without a Repository, since the old code path tried to get
the DiffConfig from the RevWalk's possibly-missing repository.

Change-Id: Idb273d5a92849b42935ac14eed73b796b80aad50

1 files changed, 4 insertions, 1 deletions

diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/revwalk/RevWalkFollowFilterTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/revwalk/RevWalkFollowFilterTest.java
index 1f70a71a11..05e552e419 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/revwalk/RevWalkFollowFilterTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/revwalk/RevWalkFollowFilterTest.java
@@ -47,8 +47,10 @@ import static org.junit.Assert.assertNull;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.eclipse.jgit.diff.DiffConfig;
 import org.eclipse.jgit.diff.DiffEntry;
 import org.eclipse.jgit.junit.TestRepository.CommitBuilder;
+import org.eclipse.jgit.lib.Config;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
@@ -74,7 +76,8 @@ public class RevWalkFollowFilterTest extends RevWalkTestCase {
 	}
 
 	protected FollowFilter follow(final String followPath) {
-		FollowFilter followFilter = FollowFilter.create(followPath);
+		FollowFilter followFilter =
+			FollowFilter.create(followPath, new Config().get(DiffConfig.KEY));
 		followFilter.setRenameCallback(diffCollector);
 		rw.setTreeFilter(followFilter);
 		return followFilter;