Simplify ensuredir() with Python3 stdlib features

- Simplify ensuredir() to equivalent os.makedir(name, exist_ok=True)
- Do not check if a directory exists before calling
  ensuredir() (ensuredir() already handles it)
- Add exist_ok argument to path.makedirs() to follow same pattern
- Drop unnecessary .exists() check immediately before .isdir()
- Add tests for ensuredir

1 files changed, 3 insertions, 3 deletions

diff --git a/sphinx/testing/path.py b/sphinx/testing/path.py
index 78c3cb7bc..143bfd994 100644
--- a/sphinx/testing/path.py
+++ b/sphinx/testing/path.py
@@ -202,12 +202,12 @@ class path(text_type):
         """
         return os.path.lexists(self)
 
-    def makedirs(self, mode=0o777):
-        # type: (int) -> None
+    def makedirs(self, mode=0o777, exist_ok=False):
+        # type: (int, bool) -> None
         """
         Recursively create directories.
         """
-        os.makedirs(self, mode)
+        os.makedirs(self, mode, exist_ok=exist_ok)  # type: ignore
 
     def joinpath(self, *args):
         # type: (Any) -> path