diff --git a/src/morevna.py b/src/morevna.py
new file mode 100644
--- /dev/null
+++ b/src/morevna.py
@@ -0,0 +1,46 @@
+import sys
+import os.path
+from argparse import ArgumentParser
+
+from hashtree import HashTree
+
+
+def buildTree(args):
+	if not os.path.isfile(args.datafile):
+		print("invalid file specified:",args.datafile,file=sys.stderr)
+		return
+	tree=HashTree.fromFile(args.datafile)
+	tree.save(args.treefile)
+
+def update(args):
+	print("ready to update")
+	print(args)
+
+def serve(args):
+	print("ready to serve")
+	print(args)
+
+parser=ArgumentParser()
+subparsers=parser.add_subparsers()
+
+pRebuild=subparsers.add_parser("build")
+pRebuild.add_argument("treefile",help="stored hash tree location")
+pRebuild.add_argument("datafile")
+pRebuild.set_defaults(func=buildTree)
+
+pUpdate=subparsers.add_parser("update")
+pUpdate.add_argument("-p","--port",type=int)
+pUpdate.add_argument("--host",default="127.0.0.1")
+pUpdate.add_argument("-t","--tree",help="stored hash tree location")
+pUpdate.add_argument("datafile")
+pUpdate.set_defaults(func=update)
+
+pServe=subparsers.add_parser("serve")
+pServe.add_argument("-p","--port",type=int)
+pServe.add_argument("--host",default="")
+pServe.add_argument("-t","--tree",help="stored hash tree location")
+pServe.add_argument("datafile")
+pServe.set_defaults(func=serve)
+
+args=parser.parse_args()
+args.func(args)