--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/python/patchutils.py	Sun Sep 01 19:38:34 2013 -0700
@@ -0,0 +1,50 @@
+
+"""
+http://k0s.org/blog/20100821174911
+
+Tag -> hg
+"""
+
+# XXX stub
+
+import subprocess
+import which
+
+def call(*args, **kwargs):
+    """"""
+    return subprocess.check_output(*args, **kwargs)
+
+class ExecuteCommands(object):
+
+    def __init__(self, *commands, **kwargs):
+        self.commands = commands
+        self.kwargs = kwargs
+
+    def __call__(self):
+        for command in self.commands:
+            yield call(command, **self.kwargs)
+
+class lsdiff(ExecuteCommands):
+    commands = ['lsdiff']
+    def __call__(self):
+        output = []
+        for retval in ExecuteCommands(self):
+            raise NotImplementedError
+
+def hg_root(directory=None):
+    directory = directory if directory else os.getcwd()
+
+# CLI
+
+def main(args=sys.argv[1:]):
+    parser = optparse.OptionParser()
+    options, args = parser.parse_args(args)
+
+    # find the root
+    root = hg_root()
+
+    # get the files
+    paths = lsdiff(root)
+
+if __name__ == '__main__':
+    main()