1 files changed, 73 insertions, 0 deletions
diff --git a/mgrapp/src/com/google/codereview/util/GitMetaUtil.java b/mgrapp/src/com/google/codereview/util/GitMetaUtil.java
new file mode 100644
index 0000000000..0625a6f96b
--- /dev/null
+++ b/mgrapp/src/com/google/codereview/util/GitMetaUtil.java
@@ -0,0 +1,73 @@
+// 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.codereview.util;
+
+import com.google.codereview.internal.GitMeta.GitCommit;
+import com.google.codereview.internal.GitMeta.GitPerson;
+
+import org.spearce.jgit.lib.PersonIdent;
+import org.spearce.jgit.lib.Repository;
+import org.spearce.jgit.revwalk.RevCommit;
+
+import java.io.File;
+import java.io.IOException;
+
+public class GitMetaUtil {
+  public static GitCommit toGitCommit(final RevCommit c) {
+    final GitCommit.Builder b = GitCommit.newBuilder();
+    b.setId(c.getId().name());
+    for (final RevCommit p : c.getParents())
+      b.addParentId(p.getId().name());
+    b.setAuthor(toGitPerson(c.getAuthorIdent()));
+    b.setCommitter(toGitPerson(c.getCommitterIdent()));
+    b.setMessage(c.getFullMessage());
+    b.setSubject(c.getShortMessage());
+    return b.build();
+  }
+
+  public static GitPerson toGitPerson(final PersonIdent who) {
+    final GitPerson.Builder b = GitPerson.newBuilder();
+    b.setName(who.getName());
+    b.setEmail(who.getEmailAddress());
+    b.setWhen((int) (who.getWhen().getTime() / 1000L));
+    b.setTz(who.getTimeZoneOffset());
+    return b.build();
+  }
+
+  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;
+  }
+}