Set person and message on stash ref update

This will be the message and person used for the commit
of stashed working directory changes.

Bug: 372884
Change-Id: I2501b080f6b94e826cf7dba3fd526ae5c1d969d1
Signed-off-by: Chris Aniszczyk <zx@twitter.com>

org.eclipse.jgit.test/tst/org/eclipse/jgit/api/StashCreateCommandTest.java

 
 import org.eclipse.jgit.diff.DiffEntry;
 import org.eclipse.jgit.lib.Constants;
+import org.eclipse.jgit.lib.ObjectId;
+import org.eclipse.jgit.lib.PersonIdent;
 import org.eclipse.jgit.lib.Ref;
 import org.eclipse.jgit.lib.RepositoryTestCase;
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.eclipse.jgit.revwalk.RevWalk;
+import org.eclipse.jgit.storage.file.ReflogEntry;
+import org.eclipse.jgit.storage.file.ReflogReader;
 import org.eclipse.jgit.treewalk.TreeWalk;
 import org.eclipse.jgit.treewalk.filter.TreeFilter;
 import org.eclipse.jgit.util.FileUtils;
 		assertEquals(DiffEntry.ChangeType.ADD, diffs.get(1).getChangeType());
 		assertEquals("file2.txt", diffs.get(1).getNewPath());
 	}
+
+	@Test
+	public void refLogIncludesCommitMessage() throws Exception {
+		PersonIdent who = new PersonIdent("user", "user@email.com");
+		deleteTrashFile("file.txt");
+		RevCommit stashed = git.stashCreate().setPerson(who).call();
+		assertNotNull(stashed);
+		assertEquals("content", read(committedFile));
+		validateStashedCommit(stashed);
+
+		ReflogReader reader = new ReflogReader(git.getRepository(),
+				Constants.R_STASH);
+		ReflogEntry entry = reader.getLastEntry();
+		assertNotNull(entry);
+		assertEquals(ObjectId.zeroId(), entry.getOldId());
+		assertEquals(stashed, entry.getNewId());
+		assertEquals(who, entry.getWho());
+		assertEquals(stashed.getFullMessage(), entry.getComment());
+	}
 }

org.eclipse.jgit/src/org/eclipse/jgit/api/StashCreateCommand.java

 		return builder;
 	}
 
-	private void updateStashRef(ObjectId commitId) throws IOException {
+	private void updateStashRef(ObjectId commitId, PersonIdent refLogIdent,
+			String refLogMessage) throws IOException {
 		Ref currentRef = repo.getRef(ref);
 		RefUpdate refUpdate = repo.updateRef(ref);
 		refUpdate.setNewObjectId(commitId);
+		refUpdate.setRefLogIdent(refLogIdent);
+		refUpdate.setRefLogMessage(refLogMessage, false);
 		if (currentRef != null)
 			refUpdate.setExpectedOldObjectId(currentRef.getObjectId());
 		else
 				commitId = inserter.insert(builder);
 				inserter.flush();
 
-				updateStashRef(commitId);
+				updateStashRef(commitId, builder.getAuthor(),
+						builder.getMessage());
 			} finally {
 				inserter.release();
 				cache.unlock();