Github now supports .git-blame-ignore-revs (GH-2948)

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

diff --git a/src/black/mode.py b/src/black/mode.py
index c8c2bd4eb26b36bf2b7626e5cf0b5be83a9fc41a..35a072c23e07bf9a493b77591a7a986d5e1e7bb8 100644 (file)
--- a/src/black/mode.py
+++ b/src/black/mode.py
@@ -4,12 +4,14 @@ Mostly around Python language feature support per version and Black configuratio
 chosen by the user.
 """
 
+from hashlib import sha256
 import sys
 
 from dataclasses import dataclass, field
-from enum import Enum
+from enum import Enum, auto
 from operator import attrgetter
 from typing import Dict, Set
+from warnings import warn
 
 if sys.version_info < (3, 8):
     from typing_extensions import Final
@@ -124,6 +126,12 @@ def supports_feature(target_versions: Set[TargetVersion], feature: Feature) -> b
 class Preview(Enum):
     """Individual preview style features."""
 
+    string_processing = auto()
+
+
+class Deprecated(UserWarning):
+    """Visible deprecation warning."""
+
 
 @dataclass
 class Mode:
@@ -134,8 +142,17 @@ class Mode:
     is_ipynb: bool = False
     magic_trailing_comma: bool = True
     experimental_string_processing: bool = False
+    python_cell_magics: Set[str] = field(default_factory=set)
     preview: bool = False
 
+    def __post_init__(self) -> None:
+        if self.experimental_string_processing:
+            warn(
+                "`experimental string processing` has been included in `preview`"
+                " and deprecated. Use `preview` instead.",
+                Deprecated,
+            )
+
     def __contains__(self, feature: Preview) -> bool:
         """
         Provide `Preview.FEATURE in Mode` syntax that mirrors the ``preview`` flag.
@@ -143,7 +160,11 @@ class Mode:
         The argument is not checked and features are not differentiated.
         They only exist to make development easier by clarifying intent.
         """
-        return self.preview
+        if feature is Preview.string_processing:
+            return self.preview or self.experimental_string_processing
+        # TODO: Remove type ignore comment once preview contains more features
+        #  than just ESP
+        return self.preview  # type: ignore
 
     def get_cache_key(self) -> str:
         if self.target_versions:
@@ -162,5 +183,6 @@ class Mode:
             str(int(self.magic_trailing_comma)),
             str(int(self.experimental_string_processing)),
             str(int(self.preview)),
+            sha256((",".join(sorted(self.python_cell_magics))).encode()).hexdigest(),
         ]
         return ".".join(parts)