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diff --git a/overlord/overlays/mercurial.py b/overlord/overlays/mercurial.py
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+++ b/overlord/overlays/mercurial.py
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+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+#################################################################################
+# overlord MERCURIAL OVERLAY HANDLER
+#################################################################################
+# File:       darcs.py
+#
+#             Handles darcs overlays
+#
+# Copyright:
+#             (c) 2005 - 2008 Gunnar Wrobel, Andres Loeh
+#             Distributed under the terms of the GNU General Public License v2
+#
+# Author(s):
+#             Gunnar Wrobel <wrobel@gentoo.org>
+#             Andres Loeh <kosmikus@gentoo.org>
+#
+''' Mercurial overlay support.'''
+
+__version__ = "$Id: mercurial.py 236 2006-09-05 20:39:37Z wrobel $"
+
+#===============================================================================
+#
+# Dependencies
+#
+#-------------------------------------------------------------------------------
+
+from   overlord.utils             import path
+from   overlord.overlays.source   import OverlaySource, require_supported
+
+#===============================================================================
+#
+# Class MercurialOverlay
+#
+#-------------------------------------------------------------------------------
+
+class MercurialOverlay(OverlaySource):
+    ''' Handles mercurial overlays.'''
+
+    type = 'Mercurial'
+    type_key = 'mercurial'
+
+    def __init__(self, parent, xml, config, _location, ignore = 0, quiet = False):
+
+        super(MercurialOverlay, self).__init__(parent, xml, config, _location, ignore, quiet)
+
+    def add(self, base, quiet = False):
+        '''Add overlay.'''
+
+        self.supported()
+
+        # hg clone SOURCE TARGET
+        args = ['clone', self.src + '/', path([base, self.parent.name])]
+        return self.run_command(*args)
+
+    def sync(self, base, quiet = False):
+        '''Sync overlay.'''
+
+        self.supported()
+
+        # hg pull -u SOURCE
+        args = ['pull', '-u', self.src]
+        return self.run_command(*args, cwd=path([base, self.parent.name]))
+
+    def supported(self):
+        '''Overlay type supported?'''
+
+        return require_supported([(self.command(),  'mercurial',
+                                         'dev-vcs/mercurial'),])