Fix parser bug where "type" was misinterpreted as a keyword inside a match (#3950)

[etc/vim.git] / src / black / cache.py

diff --git a/src/black/cache.py b/src/black/cache.py
index ff15da2a94ea89c81867146856fc6dfa23843b8b..6baa096bacafccc22f66eecb2bbaee9ad3862b25 100644 (file)
--- a/src/black/cache.py
+++ b/src/black/cache.py
@@ -1,4 +1,5 @@
 """Caching of formatted files with feature-based invalidation."""
+
 import hashlib
 import os
 import pickle
@@ -36,8 +37,9 @@ def get_cache_dir() -> Path:
     repeated calls.
     """
     # NOTE: Function mostly exists as a clean way to test getting the cache directory.
-    default_cache_dir = user_cache_dir("black", version=__version__)
+    default_cache_dir = user_cache_dir("black")
     cache_dir = Path(os.environ.get("BLACK_CACHE_DIR", default_cache_dir))
+    cache_dir = cache_dir / __version__
     return cache_dir
 
 
@@ -67,7 +69,8 @@ class Cache:
 
         with cache_file.open("rb") as fobj:
             try:
-                file_data: Dict[str, FileData] = pickle.load(fobj)
+                data: Dict[str, Tuple[float, int, str]] = pickle.load(fobj)
+                file_data = {k: FileData(*v) for k, v in data.items()}
             except (pickle.UnpicklingError, ValueError, IndexError):
                 return cls(mode, cache_file)
 
@@ -129,7 +132,12 @@ class Cache:
             with tempfile.NamedTemporaryFile(
                 dir=str(self.cache_file.parent), delete=False
             ) as f:
-                pickle.dump(self.file_data, f, protocol=4)
+                # We store raw tuples in the cache because pickling NamedTuples
+                # doesn't work with mypyc on Python 3.8, and because it's faster.
+                data: Dict[str, Tuple[float, int, str]] = {
+                    k: (*v,) for k, v in self.file_data.items()
+                }
+                pickle.dump(data, f, protocol=4)
             os.replace(f.name, self.cache_file)
         except OSError:
             pass