X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/7c94ed61a55f8ae0c60737cbc6cfee3b5066ce11..fa6caa6ca8489103d22d23f8f4ae4d3569bb115e:/src/black/__init__.py?ds=sidebyside diff --git a/src/black/__init__.py b/src/black/__init__.py index 9bc8fc1..2d04cf8 100644 --- a/src/black/__init__.py +++ b/src/black/__init__.py @@ -1,7 +1,6 @@ import asyncio from json.decoder import JSONDecodeError import json -from concurrent.futures import Executor, ThreadPoolExecutor, ProcessPoolExecutor from contextlib import contextmanager from datetime import datetime from enum import Enum @@ -10,12 +9,14 @@ from multiprocessing import Manager, freeze_support import os from pathlib import Path from pathspec.patterns.gitwildmatch import GitWildMatchPatternError +import platform import re import signal import sys import tokenize import traceback from typing import ( + TYPE_CHECKING, Any, Dict, Generator, @@ -24,6 +25,7 @@ from typing import ( MutableMapping, Optional, Pattern, + Sequence, Set, Sized, Tuple, @@ -31,13 +33,14 @@ from typing import ( ) import click +from click.core import ParameterSource 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 from black.nodes import STARS, syms, is_simple_decorator_expression -from black.nodes import is_string_token +from black.nodes import is_string_token, is_number_token from black.lines import Line, EmptyLineTracker from black.linegen import transform_line, LineGenerator, LN from black.comments import normalize_fmt_off @@ -47,7 +50,12 @@ from black.cache import read_cache, write_cache, get_cache_info, filter_cached, from black.concurrency import cancel, shutdown, maybe_install_uvloop from black.output import dump_to_file, ipynb_diff, diff, color_diff, out, err from black.report import Report, Changed, NothingChanged -from black.files import find_project_root, find_pyproject_toml, parse_pyproject_toml +from black.files import ( + find_project_root, + find_pyproject_toml, + parse_pyproject_toml, + find_user_pyproject_toml, +) from black.files import gen_python_files, get_gitignore, normalize_path_maybe_ignore from black.files import wrap_stream_for_windows from black.parsing import InvalidInput # noqa F401 @@ -69,6 +77,9 @@ from blib2to3.pgen2 import token from _black_version import version as __version__ +if TYPE_CHECKING: + from concurrent.futures import Executor + COMPILED = Path(__file__).suffix in (".pyd", ".so") # types @@ -224,6 +235,16 @@ def validate_regex( "(useful when piping source on standard input)." ), ) +@click.option( + "--python-cell-magics", + multiple=True, + help=( + "When processing Jupyter Notebooks, add the given magic to the list" + f" of known python-magics ({', '.join(PYTHON_CELL_MAGICS)})." + " Useful for formatting cells with custom python magics." + ), + default=[], +) @click.option( "-S", "--skip-string-normalization", @@ -240,9 +261,14 @@ def validate_regex( "--experimental-string-processing", is_flag=True, hidden=True, + help="(DEPRECATED and now included in --preview) Normalize string literals.", +) +@click.option( + "--preview", + is_flag=True, help=( - "Experimental option that performs more normalization on string literals." - " Currently disabled because it leads to some crashes." + "Enable potentially disruptive style changes that may be added to Black's main" + " functionality in the next major release." ), ) @click.option( @@ -274,7 +300,8 @@ def validate_regex( type=str, help=( "Require a specific version of Black to be running (useful for unifying results" - " across many environments e.g. with a pyproject.toml file)." + " across many environments e.g. with a pyproject.toml file). It can be" + " either a major version number or an exact version." ), ) @click.option( @@ -358,7 +385,10 @@ def validate_regex( ) @click.version_option( version=__version__, - message=f"%(prog)s, %(version)s (compiled: {'yes' if COMPILED else 'no'})", + message=( + f"%(prog)s, %(version)s (compiled: {'yes' if COMPILED else 'no'})\n" + f"Python ({platform.python_implementation()}) {platform.python_version()}" + ), ) @click.argument( "src", @@ -384,7 +414,7 @@ def validate_regex( help="Read configuration from FILE path.", ) @click.pass_context -def main( +def main( # noqa: C901 ctx: click.Context, code: Optional[str], line_length: int, @@ -395,9 +425,11 @@ def main( fast: bool, pyi: bool, ipynb: bool, + python_cell_magics: Sequence[str], skip_string_normalization: bool, skip_magic_trailing_comma: bool, experimental_string_processing: bool, + preview: bool, quiet: bool, verbose: bool, required_version: Optional[str], @@ -411,11 +443,65 @@ def main( config: Optional[str], ) -> None: """The uncompromising code formatter.""" - if config and verbose: - out(f"Using configuration from {config}.", bold=False, fg="blue") + ctx.ensure_object(dict) + + if src and code is not None: + out( + main.get_usage(ctx) + + "\n\n'SRC' and 'code' cannot be passed simultaneously." + ) + ctx.exit(1) + if not src and code is None: + out(main.get_usage(ctx) + "\n\nOne of 'SRC' or 'code' is required.") + ctx.exit(1) + + root, method = find_project_root(src) if code is None else (None, None) + ctx.obj["root"] = root + + if verbose: + if root: + out( + f"Identified `{root}` as project root containing a {method}.", + fg="blue", + ) + + normalized = [ + (normalize_path_maybe_ignore(Path(source), root), source) + for source in src + ] + srcs_string = ", ".join( + [ + f'"{_norm}"' + if _norm + else f'\033[31m"{source} (skipping - invalid)"\033[34m' + for _norm, source in normalized + ] + ) + out(f"Sources to be formatted: {srcs_string}", fg="blue") + + if config: + config_source = ctx.get_parameter_source("config") + user_level_config = str(find_user_pyproject_toml()) + if config == user_level_config: + out( + "Using configuration from user-level config at " + f"'{user_level_config}'.", + fg="blue", + ) + elif config_source in ( + ParameterSource.DEFAULT, + ParameterSource.DEFAULT_MAP, + ): + out("Using configuration from project root.", fg="blue") + else: + out(f"Using configuration in '{config}'.", fg="blue") error_msg = "Oh no! 💥 💔 💥" - if required_version and required_version != __version__: + if ( + required_version + and required_version != __version__ + and required_version != __version__.split(".")[0] + ): err( f"{error_msg} The required version `{required_version}` does not match" f" the running version `{__version__}`!" @@ -439,6 +525,8 @@ def main( string_normalization=not skip_string_normalization, magic_trailing_comma=not skip_magic_trailing_comma, experimental_string_processing=experimental_string_processing, + preview=preview, + python_cell_magics=set(python_cell_magics), ) if code is not None: @@ -496,6 +584,8 @@ def main( ) if verbose or not quiet: + if code is None and (verbose or report.change_count or report.failure_count): + out() out(error_msg if report.return_code else "All done! ✨ 🍰 ✨") if code is None: click.echo(str(report), err=True) @@ -516,14 +606,11 @@ def get_sources( stdin_filename: Optional[str], ) -> Set[Path]: """Compute the set of files to be formatted.""" - - root = find_project_root(src) sources: Set[Path] = set() - path_empty(src, "No Path provided. Nothing to do 😴", quiet, verbose, ctx) if exclude is None: exclude = re_compile_maybe_verbose(DEFAULT_EXCLUDES) - gitignore = get_gitignore(root) + gitignore = get_gitignore(ctx.obj["root"]) else: gitignore = None @@ -536,7 +623,7 @@ def get_sources( is_stdin = False if is_stdin or p.is_file(): - normalized_path = normalize_path_maybe_ignore(p, root, report) + normalized_path = normalize_path_maybe_ignore(p, ctx.obj["root"], report) if normalized_path is None: continue @@ -563,7 +650,7 @@ def get_sources( sources.update( gen_python_files( p.iterdir(), - root, + ctx.obj["root"], include, exclude, extend_exclude, @@ -617,6 +704,9 @@ def reformat_code( report.failed(path, 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_one( src: Path, fast: bool, write_back: WriteBack, mode: Mode, report: "Report" ) -> None: @@ -680,6 +770,8 @@ def reformat_many( workers: Optional[int], ) -> None: """Reformat multiple files using a ProcessPoolExecutor.""" + from concurrent.futures import Executor, ThreadPoolExecutor, ProcessPoolExecutor + executor: Executor loop = asyncio.get_event_loop() worker_count = workers if workers is not None else DEFAULT_WORKERS @@ -721,7 +813,7 @@ async def schedule_formatting( mode: Mode, report: "Report", loop: asyncio.AbstractEventLoop, - executor: Executor, + executor: "Executor", ) -> None: """Run formatting of `sources` in parallel using the provided `executor`. @@ -908,17 +1000,7 @@ def check_stability_and_equivalence( content differently. """ assert_equivalent(src_contents, dst_contents) - - # Forced second pass to work around optional trailing commas (becoming - # forced trailing commas on pass 2) interacting differently with optional - # parentheses. Admittedly ugly. - dst_contents_pass2 = format_str(dst_contents, mode=mode) - if dst_contents != dst_contents_pass2: - dst_contents = dst_contents_pass2 - assert_equivalent(src_contents, dst_contents, pass_num=2) - assert_stable(src_contents, dst_contents, mode=mode) - # Note: no need to explicitly call `assert_stable` if `dst_contents` was - # the same as `dst_contents_pass2`. + assert_stable(src_contents, dst_contents, mode=mode) def format_file_contents(src_contents: str, *, fast: bool, mode: Mode) -> FileContent: @@ -944,7 +1026,7 @@ def format_file_contents(src_contents: str, *, fast: bool, mode: Mode) -> FileCo return dst_contents -def validate_cell(src: str) -> None: +def validate_cell(src: str, mode: Mode) -> None: """Check that cell does not already contain TransformerManager transformations, or non-Python cell magics, which might cause tokenizer_rt to break because of indentations. @@ -963,7 +1045,10 @@ 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: + if ( + src[:2] == "%%" + and src.split()[0][2:] not in PYTHON_CELL_MAGICS | mode.python_cell_magics + ): raise NothingChanged @@ -983,7 +1068,7 @@ def format_cell(src: str, *, fast: bool, mode: Mode) -> str: could potentially be automagics or multi-line magics, which are currently not supported. """ - validate_cell(src) + validate_cell(src, mode) src_without_trailing_semicolon, has_trailing_semicolon = remove_trailing_semicolon( src ) @@ -1045,7 +1130,7 @@ def format_ipynb_string(src_contents: str, *, fast: bool, mode: Mode) -> FileCon raise NothingChanged -def format_str(src_contents: str, *, mode: Mode) -> FileContent: +def format_str(src_contents: str, *, mode: Mode) -> str: """Reformat a string and return new contents. `mode` determines formatting options, such as how many characters per line are @@ -1075,28 +1160,26 @@ def format_str(src_contents: str, *, mode: Mode) -> FileContent: hey """ + dst_contents = _format_str_once(src_contents, mode=mode) + # Forced second pass to work around optional trailing commas (becoming + # forced trailing commas on pass 2) interacting differently with optional + # parentheses. Admittedly ugly. + if src_contents != dst_contents: + return _format_str_once(dst_contents, mode=mode) + return dst_contents + + +def _format_str_once(src_contents: str, *, mode: Mode) -> str: src_node = lib2to3_parse(src_contents.lstrip(), mode.target_versions) dst_contents = [] - future_imports = get_future_imports(src_node) if mode.target_versions: versions = mode.target_versions else: + future_imports = get_future_imports(src_node) versions = detect_target_versions(src_node, future_imports=future_imports) - # 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, - remove_u_prefix="unicode_literals" in future_imports - or supports_feature(versions, Feature.UNICODE_LITERALS), - ) + normalize_fmt_off(src_node, preview=mode.preview) + lines = LineGenerator(mode=mode) elt = EmptyLineTracker(is_pyi=mode.is_pyi) empty_line = Line(mode=mode) after = 0 @@ -1162,18 +1245,9 @@ def get_features_used( # noqa: C901 if value_head in {'f"', 'F"', "f'", "F'", "rf", "fr", "RF", "FR"}: features.add(Feature.F_STRINGS) - elif n.type == token.NUMBER: - assert isinstance(n, Leaf) + elif is_number_token(n): 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 { @@ -1226,31 +1300,24 @@ def get_features_used( # noqa: C901 ): features.add(Feature.ANN_ASSIGN_EXTENDED_RHS) - # 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) + elif ( + n.type == syms.except_clause + and len(n.children) >= 2 + and n.children[1].type == token.STAR + ): + features.add(Feature.EXCEPT_STAR) + + elif n.type in {syms.subscriptlist, syms.trailer} and any( + child.type == syms.star_expr for child in n.children + ): + features.add(Feature.VARIADIC_GENERICS) + + elif ( + n.type == syms.tname_star + and len(n.children) == 3 + and n.children[2].type == syms.star_expr + ): + features.add(Feature.VARIADIC_GENERICS) return features @@ -1315,13 +1382,16 @@ def get_future_imports(node: Node) -> Set[str]: return imports -def assert_equivalent(src: str, dst: str, *, pass_num: int = 1) -> None: +def assert_equivalent(src: str, dst: str) -> None: """Raise AssertionError if `src` and `dst` aren't equivalent.""" try: src_ast = parse_ast(src) except Exception as exc: raise AssertionError( - f"cannot use --safe with this file; failed to parse source file: {exc}" + "cannot use --safe with this file; failed to parse source file AST: " + f"{exc}\n" + "This could be caused by running Black with an older Python version " + "that does not support new syntax used in your source file." ) from exc try: @@ -1329,7 +1399,7 @@ def assert_equivalent(src: str, dst: str, *, pass_num: int = 1) -> None: except Exception as exc: log = dump_to_file("".join(traceback.format_tb(exc.__traceback__)), dst) raise AssertionError( - f"INTERNAL ERROR: Black produced invalid code on pass {pass_num}: {exc}. " + f"INTERNAL ERROR: Black produced invalid code: {exc}. " "Please report a bug on https://github.com/psf/black/issues. " f"This invalid output might be helpful: {log}" ) from None @@ -1340,14 +1410,17 @@ def assert_equivalent(src: str, dst: str, *, pass_num: int = 1) -> None: log = dump_to_file(diff(src_ast_str, dst_ast_str, "src", "dst")) raise AssertionError( "INTERNAL ERROR: Black produced code that is not equivalent to the" - f" source on pass {pass_num}. Please report a bug on " + " source. Please report a bug on " f"https://github.com/psf/black/issues. This diff might be helpful: {log}" ) from None def assert_stable(src: str, dst: str, mode: Mode) -> None: """Raise AssertionError if `dst` reformats differently the second time.""" - newdst = format_str(dst, mode=mode) + # We shouldn't call format_str() here, because that formats the string + # twice and may hide a bug where we bounce back and forth between two + # versions. + newdst = _format_str_once(dst, mode=mode) if dst != newdst: log = dump_to_file( str(mode), @@ -1381,13 +1454,23 @@ def patch_click() -> None: file paths is minimal since it's Python source code. Moreover, this crash was spurious on Python 3.7 thanks to PEP 538 and PEP 540. """ + modules: List[Any] = [] try: from click import core - from click import _unicodefun - except ModuleNotFoundError: - return + except ImportError: + pass + else: + modules.append(core) + try: + # Removed in Click 8.1.0 and newer; we keep this around for users who have + # older versions installed. + from click import _unicodefun # type: ignore + except ImportError: + pass + else: + modules.append(_unicodefun) - for module in (core, _unicodefun): + for module in modules: if hasattr(module, "_verify_python3_env"): module._verify_python3_env = lambda: None # type: ignore if hasattr(module, "_verify_python_env"):