add hg and python

sys/lib/python/mercurial/node.py

@@ -0,0 +1,18 @@
+# node.py - basic nodeid manipulation for mercurial
+#
+# Copyright 2005, 2006 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 binascii
+
+nullrev = -1
+nullid = "\0" * 20
+
+# This ugly style has a noticeable effect in manifest parsing
+hex = binascii.hexlify
+bin = binascii.unhexlify
+
+def short(node):
+    return hex(node[:6])