Handle changes in refs/meta

When there is a change for review in branch other than refs/heads/ or
refs/tags, they are presented with the refs/ prefix. This will cause
branch location recorded incorrectly during import.

Detect refs/ prefix instead of refs/heads prefix to fix this.
refs/tags should be okay as it is processed somewhere else.

Change-Id: I7a9b9a4f710398e52a89e21c64e76bcebaf3e1c6
Signed-off-by: Ardo Septama <aseptama@gmail.com>

src/main/java/com/googlesource/gerrit/plugins/importer/ReplayChangesStep.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/importer/ReplayChangesStep.java b/src/main/java/com/googlesource/gerrit/plugins/importer/ReplayChangesStep.java
index 4f05b44..200d7cc 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/importer/ReplayChangesStep.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/importer/ReplayChangesStep.java
@@ -25,6 +25,7 @@
 import com.google.gerrit.reviewdb.client.Branch;
 import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.reviewdb.client.RefNames;
 import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.Sequences;
 import com.google.gerrit.server.update.UpdateException;
@@ -39,7 +40,6 @@
 import com.google.inject.assistedinject.Assisted;
 
 import org.eclipse.jgit.errors.ConfigInvalidException;
-import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.ProgressMonitor;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.revwalk.RevWalk;
@@ -220,7 +220,7 @@
   private Change findChange(ChangeInfo c) throws OrmException {
     List<Change> changes = ChangeData.asChanges(
         queryProvider.get().byBranchKey(
-            new Branch.NameKey(targetProject, fullName(c.branch)),
+            new Branch.NameKey(targetProject, RefNames.fullName(c.branch)),
             new Change.Key(c.changeId)));
     if (changes.isEmpty()) {
       return null;
@@ -236,7 +236,7 @@
 
     Change change =
         new Change(new Change.Key(c.changeId), changeId, accountUtil.resolveUser(api, c.owner),
-            new Branch.NameKey(targetProject, fullName(c.branch)), c.created);
+            new Branch.NameKey(targetProject, RefNames.fullName(c.branch)), c.created);
     change.setStatus(Change.Status.forChangeStatus(c.status));
     change.setTopic(c.topic);
     change.setLastUpdatedOn(c.updated);
@@ -252,11 +252,4 @@
     }
     db.changes().upsert(Collections.singleton(change));
   }
-
-  private static String fullName(String branch) {
-    if (branch.startsWith(Constants.R_HEADS)) {
-      return branch;
-    }
-    return Constants.R_HEADS + branch;
-  }
 }