1 files changed, 47 insertions, 0 deletions
diff --git a/src/main/java/com/google/gerrit/git/GitMetaUtil.java b/src/main/java/com/google/gerrit/git/GitMetaUtil.java
new file mode 100644
index 0000000000..2bb3ee1331
--- /dev/null
+++ b/src/main/java/com/google/gerrit/git/GitMetaUtil.java
@@ -0,0 +1,47 @@
+// Copyright 2008 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.git;
+
+import org.spearce.jgit.lib.Repository;
+
+import java.io.File;
+import java.io.IOException;
+
+public class GitMetaUtil {
+  public static boolean isGitRepository(final File gitdir) {
+    return new File(gitdir, "config").isFile()
+        && new File(gitdir, "HEAD").isFile()
+        && new File(gitdir, "objects").isDirectory()
+        && new File(gitdir, "refs/heads").isDirectory();
+  }
+
+  public static Repository open(final File gitdir) throws IOException {
+    if (isGitRepository(gitdir)) {
+      return new Repository(gitdir);
+    }
+
+    if (isGitRepository(new File(gitdir, ".git"))) {
+      return new Repository(new File(gitdir, ".git"));
+    }
+
+    final String name = gitdir.getName();
+    final File parent = gitdir.getParentFile();
+    if (isGitRepository(new File(parent, name + ".git"))) {
+      return new Repository(new File(parent, name + ".git"));
+    }
+
+    return null;
+  }
+}