util: fake the builtin buffer if it's missing (jython)

mercurial/util.py

@@ -36,6 +36,13 b' def _fastsha1(s):'
     _fastsha1 = sha1 = _sha1
     return _sha1(s)
 
+import __builtin__
+
+def fakebuffer(sliceable, offset=0):
+    return sliceable[offset:]
+if not hasattr(__builtin__, 'buffer'):
+    __builtin__.buffer = fakebuffer
+
 import subprocess
 closefds = os.name == 'posix'