X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/9afffacaa0e5ac911f9feacb916bc48473dcb117..e151686c6fc291a72058a26de8e6279669d756cc:/src/black/__init__.py

diff --git a/src/black/__init__.py b/src/black/__init__.py
index c503c1a..c2b52e6 100644
--- a/src/black/__init__.py
+++ b/src/black/__init__.py
@@ -30,8 +30,9 @@ from typing import (
     Union,
 )
 
-from dataclasses import replace
 import click
+from dataclasses import replace
+from mypy_extensions import mypyc_attr
 
 from black.const import DEFAULT_LINE_LENGTH, DEFAULT_INCLUDES, DEFAULT_EXCLUDES
 from black.const import STDIN_PLACEHOLDER
@@ -56,6 +57,7 @@ from black.handle_ipynb_magics import (
     remove_trailing_semicolon,
     put_trailing_semicolon_back,
     TRANSFORMED_MAGICS,
+    PYTHON_CELL_MAGICS,
     jupyter_dependencies_are_installed,
 )
 
@@ -66,6 +68,8 @@ from blib2to3.pgen2 import token
 
 from _black_version import version as __version__
 
+COMPILED = Path(__file__).suffix in (".pyd", ".so")
+
 # types
 FileContent = str
 Encoding = str
@@ -177,7 +181,12 @@ def validate_regex(
         raise click.BadParameter("Not a valid regular expression") from None
 
 
-@click.command(context_settings=dict(help_option_names=["-h", "--help"]))
+@click.command(
+    context_settings={"help_option_names": ["-h", "--help"]},
+    # While Click does set this field automatically using the docstring, mypyc
+    # (annoyingly) strips 'em so we need to set it here too.
+    help="The uncompromising code formatter.",
+)
 @click.option("-c", "--code", type=str, help="Format the code passed in as a string.")
 @click.option(
     "-l",
@@ -346,7 +355,10 @@ def validate_regex(
         " due to exclusion patterns."
     ),
 )
-@click.version_option(version=__version__)
+@click.version_option(
+    version=__version__,
+    message=f"%(prog)s, %(version)s (compiled: {'yes' if COMPILED else 'no'})",
+)
 @click.argument(
     "src",
     nargs=-1,
@@ -387,7 +399,7 @@ def main(
     experimental_string_processing: bool,
     quiet: bool,
     verbose: bool,
-    required_version: str,
+    required_version: Optional[str],
     include: Pattern[str],
     exclude: Optional[Pattern[str]],
     extend_exclude: Optional[Pattern[str]],
@@ -655,6 +667,9 @@ def reformat_one(
         report.failed(src, str(exc))
 
 
+# diff-shades depends on being to monkeypatch this function to operate. I know it's
+# not ideal, but this shouldn't cause any issues ... hopefully. ~ichard26
+@mypyc_attr(patchable=True)
 def reformat_many(
     sources: Set[Path],
     fast: bool,
@@ -669,10 +684,11 @@ def reformat_many(
     worker_count = workers if workers is not None else DEFAULT_WORKERS
     if sys.platform == "win32":
         # Work around https://bugs.python.org/issue26903
+        assert worker_count is not None
         worker_count = min(worker_count, 60)
     try:
         executor = ProcessPoolExecutor(max_workers=worker_count)
-    except (ImportError, OSError):
+    except (ImportError, NotImplementedError, OSError):
         # we arrive here if the underlying system does not support multi-processing
         # like in AWS Lambda or Termux, in which case we gracefully fallback to
         # a ThreadPoolExecutor with just a single worker (more workers would not do us
@@ -928,7 +944,9 @@ def format_file_contents(src_contents: str, *, fast: bool, mode: Mode) -> FileCo
 
 
 def validate_cell(src: str) -> None:
-    """Check that cell does not already contain TransformerManager transformations.
+    """Check that cell does not already contain TransformerManager transformations,
+    or non-Python cell magics, which might cause tokenizer_rt to break because of
+    indentations.
 
     If a cell contains ``!ls``, then it'll be transformed to
     ``get_ipython().system('ls')``. However, if the cell originally contained
@@ -944,6 +962,8 @@ def validate_cell(src: str) -> None:
     """
     if any(transformed_magic in src for transformed_magic in TRANSFORMED_MAGICS):
         raise NothingChanged
+    if src[:2] == "%%" and src.split()[0][2:] not in PYTHON_CELL_MAGICS:
+        raise NothingChanged
 
 
 def format_cell(src: str, *, fast: bool, mode: Mode) -> str:
@@ -1061,6 +1081,15 @@ def format_str(src_contents: str, *, mode: Mode) -> FileContent:
         versions = mode.target_versions
     else:
         versions = detect_target_versions(src_node)
+
+    # TODO: fully drop support and this code hopefully in January 2022 :D
+    if TargetVersion.PY27 in mode.target_versions or versions == {TargetVersion.PY27}:
+        msg = (
+            "DEPRECATION: Python 2 support will be removed in the first stable release "
+            "expected in January 2022."
+        )
+        err(msg, fg="yellow", bold=True)
+
     normalize_fmt_off(src_node)
     lines = LineGenerator(
         mode=mode,
@@ -1103,7 +1132,7 @@ def decode_bytes(src: bytes) -> Tuple[FileContent, Encoding, NewLine]:
         return tiow.read(), encoding, newline
 
 
-def get_features_used(node: Node) -> Set[Feature]:
+def get_features_used(node: Node) -> Set[Feature]:  # noqa: C901
     """Return a set of (relatively) new Python features used in this file.
 
     Currently looking for:
@@ -1113,6 +1142,7 @@ def get_features_used(node: Node) -> Set[Feature]:
     - positional only arguments in function signatures and lambdas;
     - assignment expression;
     - relaxed decorator syntax;
+    - print / exec statements;
     """
     features: Set[Feature] = set()
     for n in node.pre_order():
@@ -1122,8 +1152,17 @@ def get_features_used(node: Node) -> Set[Feature]:
                 features.add(Feature.F_STRINGS)
 
         elif n.type == token.NUMBER:
-            if "_" in n.value:  # type: ignore
+            assert isinstance(n, Leaf)
+            if "_" in n.value:
                 features.add(Feature.NUMERIC_UNDERSCORES)
+            elif n.value.endswith(("L", "l")):
+                # Python 2: 10L
+                features.add(Feature.LONG_INT_LITERAL)
+            elif len(n.value) >= 2 and n.value[0] == "0" and n.value[1].isdigit():
+                # Python 2: 0123; 00123; ...
+                if not all(char == "0" for char in n.value):
+                    # although we don't want to match 0000 or similar
+                    features.add(Feature.OCTAL_INT_LITERAL)
 
         elif n.type == token.SLASH:
             if n.parent and n.parent.type in {
@@ -1161,6 +1200,32 @@ def get_features_used(node: Node) -> Set[Feature]:
                         if argch.type in STARS:
                             features.add(feature)
 
+        # Python 2 only features (for its deprecation) except for integers, see above
+        elif n.type == syms.print_stmt:
+            features.add(Feature.PRINT_STMT)
+        elif n.type == syms.exec_stmt:
+            features.add(Feature.EXEC_STMT)
+        elif n.type == syms.tfpdef:
+            # def set_position((x, y), value):
+            #     ...
+            features.add(Feature.AUTOMATIC_PARAMETER_UNPACKING)
+        elif n.type == syms.except_clause:
+            # try:
+            #     ...
+            # except Exception, err:
+            #     ...
+            if len(n.children) >= 4:
+                if n.children[-2].type == token.COMMA:
+                    features.add(Feature.COMMA_STYLE_EXCEPT)
+        elif n.type == syms.raise_stmt:
+            # raise Exception, "msg"
+            if len(n.children) >= 4:
+                if n.children[-2].type == token.COMMA:
+                    features.add(Feature.COMMA_STYLE_RAISE)
+        elif n.type == token.BACKQUOTE:
+            # `i'm surprised this ever existed`
+            features.add(Feature.BACKQUOTE_REPR)
+
     return features