fix(parameter): fixes nested directory diff

The parameters recently added the support for nested directories. This
is not supported by the diff implementation. This commit adds recursive
diffing for nested directories. It also fixes redundant newlines in the
diff_files output.

riocli/parameter/diff.py

@@ -26,7 +26,6 @@
 import click
 from click_help_colors import HelpColorsCommand
 from rapyuta_io.utils.error import APIError, InternalServerError
-from yaspin import kbi_safe_yaspin
 
 from riocli.config import new_client
 from riocli.constants import Colors
@@ -51,12 +50,8 @@ def diff_configurations(path: str, tree_names: Tuple = None) -> None:
     try:
         client = new_client()
         with TemporaryDirectory(prefix='riocli-') as tmp_path:
-            with kbi_safe_yaspin(
-                    text="Fetching configurations from the cloud..."):
-                client.download_configurations(
-                    tmp_path,
-                    tree_names=list(tree_names)
-                )
+            client.download_configurations(tmp_path,
+                                           tree_names=list(tree_names))
 
             for tree in trees:
                 left_tree = os.path.join(tmp_path, tree)
@@ -70,6 +65,11 @@ def diff_configurations(path: str, tree_names: Tuple = None) -> None:
 def diff_tree(left: str, right: str) -> None:
     comp = dircmp(left, right)
 
+    for f in comp.common_dirs:
+        remote_dir, local_dir = os.path.join(comp.left, f), os.path.join(
+            comp.right, f)
+        diff_tree(remote_dir, local_dir)
+
     for f in comp.diff_files:
         remote_file, local_file = os.path.join(comp.left, f), os.path.join(
             comp.right, f)
@@ -98,10 +98,10 @@ def diff_file(left: str, right: str):
         return
 
     diff = unified_diff(left_lines, right_lines, fromfile=left, tofile=right,
-                        lineterm='')
+                        lineterm='\n')
 
     for line in diff:
-        click.secho(line)
+        click.secho(line, nl=False)
 
 
 def changed_file(left: str, right: str, left_only: bool = False,