diff --git a/ugit/base.py b/ugit/base.py
index 21b4102..a858ad0 100644
--- a/ugit/base.py
+++ b/ugit/base.py
@@ -1 +1,14 @@
+from pathlib import Path
+
 from . import data
+
+
+def write_tree(directory="."):
+    with Path.iterdir(directory) as it:
+        for entry in it:
+            full = f"{directory}/{entry.name}"
+            if entry.is_file(follow_symlinks=False):
+                # TODO write the file to object store
+                print(full)
+            elif entry.is_dir(follow_symlinks=False):
+                write_tree(full)
diff --git a/ugit/cli.py b/ugit/cli.py
index cf16f37..3cfe23f 100644
--- a/ugit/cli.py
+++ b/ugit/cli.py
@@ -25,6 +25,9 @@ def parse_args():
     cat_file_parser.set_defaults(func=cat_file)
     cat_file_parser.add_argument("object")
 
+    write_tree_parser = commands.add_parser("write-tree")
+    write_tree_parser.set_defaults(func=write_tree)
+
     hash_object_parser = commands.add_parser("hash-object")
     hash_object_parser.set_defaults(func=hash_object)
     hash_object_parser.add_argument("file")
@@ -45,3 +48,7 @@ def hash_object(args):
 def cat_file(args):
     sys.stdout.flush()
     sys.stdout.buffer.write(data.get_object(args.object), expected=None)
+
+
+def write_tree(args):
+    base.write_tree()