diff --git a/hgext/share.py b/hgext/share.py
new file mode 100644
--- /dev/null
+++ b/hgext/share.py
@@ -0,0 +1,31 @@
+# Mercurial extension to provide the 'hg share' command
+#
+# Copyright 2006, 2007 Matt Mackall <mpm@selenic.com>
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2, incorporated herein by reference.
+
+import os
+from mercurial.i18n import _
+from mercurial import hg, commands
+
+def share(ui, source, dest, noupdate=False):
+    """create a new shared repository (experimental)
+
+    Initialize a new repository and working directory that shares its
+    history with another repository.
+
+    NOTE: actions that change history such as rollback or moving the
+    source may confuse sharers.
+    """
+
+    return hg.share(ui, source, dest, not noupdate)
+
+cmdtable = {
+    "share":
+    (share,
+     [('U', 'noupdate', None, _('do not create a working copy'))],
+     _('[-U] SOURCE DEST')),
+}
+
+commands.norepo += " share"