X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/14b28c89c22659e1f935bc0ac22ee03d90bcc290..adce126949623da2f310e6ea3f9f83c37972582a:/black.py diff --git a/black.py b/black.py index 151c1a6..b3699d5 100644 --- a/black.py +++ b/black.py @@ -43,6 +43,7 @@ from attr import dataclass, evolve, Factory import click import toml from typed_ast import ast3, ast27 +from pathspec import PathSpec # lib2to3 fork from blib2to3.pytree import Node, Leaf, type_repr @@ -51,7 +52,7 @@ from blib2to3.pgen2 import driver, token from blib2to3.pgen2.grammar import Grammar from blib2to3.pgen2.parse import ParseError -from _version import version as __version__ +from _black_version import version as __version__ DEFAULT_LINE_LENGTH = 88 DEFAULT_EXCLUDES = r"/(\.eggs|\.git|\.hg|\.mypy_cache|\.nox|\.tox|\.venv|\.svn|_build|buck-out|build|dist)/" # noqa: B950 @@ -436,7 +437,9 @@ def main( p = Path(s) if p.is_dir(): sources.update( - gen_python_files_in_dir(p, root, include_regex, exclude_regex, report) + gen_python_files_in_dir( + p, root, include_regex, exclude_regex, report, get_gitignore(root) + ) ) elif p.is_file() or s == "-": # if a file was explicitly given, we don't care about its extension @@ -784,7 +787,8 @@ def get_grammars(target_versions: Set[TargetVersion]) -> List[Grammar]: # Python 2.7 pygram.python_grammar, ] - elif all(version.is_python2() for version in target_versions): + + if all(version.is_python2() for version in target_versions): # Python 2-only code, so try Python 2 grammars. return [ # Python 2.7 with future print_function import @@ -792,21 +796,21 @@ def get_grammars(target_versions: Set[TargetVersion]) -> List[Grammar]: # Python 2.7 pygram.python_grammar, ] - else: - # Python 3-compatible code, so only try Python 3 grammar. - grammars = [] - # If we have to parse both, try to parse async as a keyword first - if not supports_feature(target_versions, Feature.ASYNC_IDENTIFIERS): - # Python 3.7+ - grammars.append( - pygram.python_grammar_no_print_statement_no_exec_statement_async_keywords # noqa: B950 - ) - if not supports_feature(target_versions, Feature.ASYNC_KEYWORDS): - # Python 3.0-3.6 - grammars.append(pygram.python_grammar_no_print_statement_no_exec_statement) - # At least one of the above branches must have been taken, because every Python - # version has exactly one of the two 'ASYNC_*' flags - return grammars + + # Python 3-compatible code, so only try Python 3 grammar. + grammars = [] + # If we have to parse both, try to parse async as a keyword first + if not supports_feature(target_versions, Feature.ASYNC_IDENTIFIERS): + # Python 3.7+ + grammars.append( + pygram.python_grammar_no_print_statement_no_exec_statement_async_keywords + ) + if not supports_feature(target_versions, Feature.ASYNC_KEYWORDS): + # Python 3.0-3.6 + grammars.append(pygram.python_grammar_no_print_statement_no_exec_statement) + # At least one of the above branches must have been taken, because every Python + # version has exactly one of the two 'ASYNC_*' flags + return grammars def lib2to3_parse(src_txt: str, target_versions: Iterable[TargetVersion] = ()) -> Node: @@ -1714,19 +1718,6 @@ class LineGenerator(Visitor[Line]): self.current_line.append(node) yield from super().visit_default(node) - def visit_factor(self, node: Node) -> Iterator[Line]: - """Force parentheses between a unary op and a binary power: - - -2 ** 8 -> -(2 ** 8) - """ - child = node.children[1] - if child.type == syms.power and len(child.children) == 3: - lpar = Leaf(token.LPAR, "(") - rpar = Leaf(token.RPAR, ")") - index = child.remove() or 0 - node.insert_child(index, Node(syms.atom, [lpar, child, rpar])) - yield from self.visit_default(node) - def visit_INDENT(self, node: Node) -> Iterator[Line]: """Increase indentation level, maybe yield a line.""" # In blib2to3 INDENT never holds comments. @@ -1826,6 +1817,23 @@ class LineGenerator(Visitor[Line]): yield from self.line() yield from self.visit_default(leaf) + def visit_factor(self, node: Node) -> Iterator[Line]: + """Force parentheses between a unary op and a binary power: + + -2 ** 8 -> -(2 ** 8) + """ + _operator, operand = node.children + if ( + operand.type == syms.power + and len(operand.children) == 3 + and operand.children[1].type == token.DOUBLESTAR + ): + lpar = Leaf(token.LPAR, "(") + rpar = Leaf(token.RPAR, ")") + index = operand.remove() or 0 + node.insert_child(index, Node(syms.atom, [lpar, operand, rpar])) + yield from self.visit_default(node) + def __attrs_post_init__(self) -> None: """You are in a twisty little maze of passages.""" v = self.visit_stmt @@ -2399,7 +2407,9 @@ def split_line( # All splits failed, best effort split with no omits. # This mostly happens to multiline strings that are by definition # reported as not fitting a single line. - yield from right_hand_split(line, line_length, features=features) + # line_length=1 here was historically a bug that somehow became a feature. + # See #762 and #781 for the full story. + yield from right_hand_split(line, line_length=1, features=features) if line.inside_brackets: split_funcs = [delimiter_split, standalone_comment_split, rhs] @@ -2598,9 +2608,11 @@ def bracket_split_build_line( # Since body is a new indent level, remove spurious leading whitespace. normalize_prefix(leaves[0], inside_brackets=True) # Ensure a trailing comma for imports and standalone function arguments, but - # be careful not to add one after any comments. - no_commas = original.is_def and not any( - l.type == token.COMMA for l in leaves + # be careful not to add one after any comments or within type annotations. + no_commas = ( + original.is_def + and opening_bracket.value == "(" + and not any(l.type == token.COMMA for l in leaves) ) if original.is_import or no_commas: @@ -3453,12 +3465,23 @@ def get_future_imports(node: Node) -> Set[str]: return imports +@lru_cache() +def get_gitignore(root: Path) -> PathSpec: + """ Return a PathSpec matching gitignore content if present.""" + gitignore = root / ".gitignore" + if not gitignore.is_file(): + return PathSpec.from_lines("gitwildmatch", []) + else: + return PathSpec.from_lines("gitwildmatch", gitignore.open()) + + def gen_python_files_in_dir( path: Path, root: Path, include: Pattern[str], exclude: Pattern[str], report: "Report", + gitignore: PathSpec, ) -> Iterator[Path]: """Generate all files under `path` whose paths are not excluded by the `exclude` regex, but are included by the `include` regex. @@ -3469,8 +3492,17 @@ def gen_python_files_in_dir( """ assert root.is_absolute(), f"INTERNAL ERROR: `root` must be absolute but is {root}" for child in path.iterdir(): + # First ignore files matching .gitignore + if gitignore.match_file(child.as_posix()): + report.path_ignored(child, f"matches the .gitignore file content") + continue + + # Then ignore with `exclude` option. try: normalized_path = "/" + child.resolve().relative_to(root).as_posix() + except OSError as e: + report.path_ignored(child, f"cannot be read because {e}") + continue except ValueError: if child.is_symlink(): report.path_ignored( @@ -3482,13 +3514,16 @@ def gen_python_files_in_dir( if child.is_dir(): normalized_path += "/" + exclude_match = exclude.search(normalized_path) if exclude_match and exclude_match.group(0): report.path_ignored(child, f"matches the --exclude regular expression") continue if child.is_dir(): - yield from gen_python_files_in_dir(child, root, include, exclude, report) + yield from gen_python_files_in_dir( + child, root, include, exclude, report, gitignore + ) elif child.is_file(): include_match = include.search(normalized_path) @@ -3634,14 +3669,12 @@ def _fixup_ast_constants( node: Union[ast.AST, ast3.AST, ast27.AST] ) -> Union[ast.AST, ast3.AST, ast27.AST]: """Map ast nodes deprecated in 3.8 to Constant.""" - # casts are required until this is released: - # https://github.com/python/typeshed/pull/3142 if isinstance(node, (ast.Str, ast3.Str, ast27.Str, ast.Bytes, ast3.Bytes)): - return cast(ast.AST, ast.Constant(value=node.s)) - elif isinstance(node, (ast.Num, ast3.Num, ast27.Num)): - return cast(ast.AST, ast.Constant(value=node.n)) - elif isinstance(node, (ast.NameConstant, ast3.NameConstant)): - return cast(ast.AST, ast.Constant(value=node.value)) + return ast.Constant(value=node.s) + if isinstance(node, (ast.Num, ast3.Num, ast27.Num)): + return ast.Constant(value=node.n) + if isinstance(node, (ast.NameConstant, ast3.NameConstant)): + return ast.Constant(value=node.value) return node @@ -3752,8 +3785,10 @@ def dump_to_file(*output: str) -> str: @contextmanager def nullcontext() -> Iterator[None]: - """Return context manager that does nothing. - Similar to `nullcontext` from python 3.7""" + """Return an empty context manager. + + To be used like `nullcontext` in Python 3.7. + """ yield @@ -4006,7 +4041,7 @@ def read_cache(mode: FileMode) -> Cache: with cache_file.open("rb") as fobj: try: cache: Cache = pickle.load(fobj) - except pickle.UnpicklingError: + except (pickle.UnpicklingError, ValueError): return {} return cache @@ -4041,7 +4076,7 @@ def write_cache(cache: Cache, sources: Iterable[Path], mode: FileMode) -> None: CACHE_DIR.mkdir(parents=True, exist_ok=True) new_cache = {**cache, **{src.resolve(): get_cache_info(src) for src in sources}} with tempfile.NamedTemporaryFile(dir=str(cache_file.parent), delete=False) as f: - pickle.dump(new_cache, f, protocol=pickle.HIGHEST_PROTOCOL) + pickle.dump(new_cache, f, protocol=4) os.replace(f.name, cache_file) except OSError: pass