--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tmatesoft/hg/repo/HgLookup.java	Thu Jan 27 21:22:57 2011 +0100
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2010-2011 TMate Software Ltd
+ *  
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * For information on how to redistribute this software under
+ * the terms of a license other than GNU General Public License
+ * contact TMate Software at support@svnkit.com
+ */
+package org.tmatesoft.hg.repo;
+
+import java.io.File;
+
+/**
+ * 
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+public class HgLookup {
+
+	public HgRepository detectFromWorkingDir() throws Exception {
+		return detect(System.getProperty("user.dir"));
+	}
+
+	public HgRepository detect(String location) throws Exception /*FIXME Exception type, RepoInitException? */ {
+		return detect(new File(location));
+	}
+
+	// look up in specified location and above
+	public HgRepository detect(File location) throws Exception {
+		File dir = location;
+		File repository;
+		do {
+			repository = new File(dir, ".hg");
+			if (repository.exists() && repository.isDirectory()) {
+				break;
+			}
+			repository = null;
+			dir = dir.getParentFile();
+			
+		} while(dir != null);
+		if (repository == null) {
+			// return invalid repository
+			return new HgRepository(location.getPath());
+		}
+		return new HgRepository(repository);
+	}
+}