Support branches with name 'config'

JGit was not able to lookup refs which had the name of files which exist
in the .git folder. When JGit was looking up a ref named X it has a
fixed set of directories where it searched for files named X
(ignore packed refs for now). First directory to search for is .git. In
case of the ref named 'config' it searched there for this file, found it
(it's the .git/config file with the repo configuration in it), parsed
it, found it is an invalid ref and stopped searching. It never looked
for a file .git/refs/heads/config.

I changed JGit in a way that when it finds a file in GIT_DIR which
corresponds to a ref name and if this file doesn't contain a valid ref
then it will ignore the InvalidObjectIdException and continue searching.

Change-Id: Ic26a329fb1624a5b2b2494c78bac4bd76817c100
Bug: 381574
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
Signed-off-by: Stefan Lay <stefan.lay@sap.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/storage/file/RefDirectoryTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/storage/file/RefDirectoryTest.java
index 153f7b791c..a602f7c7d5 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/storage/file/RefDirectoryTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/storage/file/RefDirectoryTest.java
@@ -360,6 +360,19 @@ public class RefDirectoryTest extends LocalDiskRepositoryTestCase {
 	}
 
 	@Test
+	public void testReadNotExistingBranchConfig() throws IOException {
+		assertNull("find branch config", refdir.getRef("config"));
+		assertNull("find branch config", refdir.getRef("refs/heads/config"));
+	}
+
+	@Test
+	public void testReadBranchConfig() throws IOException {
+		writeLooseRef("refs/heads/config", A);
+
+		assertNotNull("find branch config", refdir.getRef("config"));
+	}
+
+	@Test
 	public void testGetRefs_HeadsOnly_AllLoose() throws IOException {
 		Map<String, Ref> heads;
 		Ref a, b;