X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/7546ed292c32ce6b86d0b5b2396131fa42f10645..66aa676278948368dff251dffd58c850cb8b889e:/black.py

diff --git a/black.py b/black.py
index 57d5c83..c4b9132 100644
--- a/black.py
+++ b/black.py
@@ -14,6 +14,7 @@ import pickle
 import re
 import signal
 import sys
+import tempfile
 import tokenize
 from typing import (
     Any,
@@ -1605,7 +1606,7 @@ BRACKETS = OPENING_BRACKETS | CLOSING_BRACKETS
 ALWAYS_NO_SPACE = CLOSING_BRACKETS | {token.COMMA, STANDALONE_COMMENT}
 
 
-def whitespace(leaf: Leaf, *, complex_subscript: bool) -> str:  # noqa C901
+def whitespace(leaf: Leaf, *, complex_subscript: bool) -> str:  # noqa: C901
     """Return whitespace prefix if needed for the given `leaf`.
 
     `complex_subscript` signals whether the given leaf is part of a subscription
@@ -3647,11 +3648,11 @@ def write_cache(
     """Update the cache file."""
     cache_file = get_cache_file(line_length, mode)
     try:
-        if not CACHE_DIR.exists():
-            CACHE_DIR.mkdir(parents=True)
+        CACHE_DIR.mkdir(parents=True, exist_ok=True)
         new_cache = {**cache, **{src.resolve(): get_cache_info(src) for src in sources}}
-        with cache_file.open("wb") as fobj:
-            pickle.dump(new_cache, fobj, protocol=pickle.HIGHEST_PROTOCOL)
+        with tempfile.NamedTemporaryFile(dir=str(cache_file.parent), delete=False) as f:
+            pickle.dump(new_cache, f, protocol=pickle.HIGHEST_PROTOCOL)
+        os.replace(f.name, cache_file)
     except OSError:
         pass