X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/af3de081542f66dfb1482dcf2a654b7e1668783c..c9efbf9d97b65d67f6e87ee4b77bed0445bd7a9f:/src/black/__init__.py diff --git a/src/black/__init__.py b/src/black/__init__.py index 5b8c974..4ebf288 100644 --- a/src/black/__init__.py +++ b/src/black/__init__.py @@ -30,6 +30,7 @@ from typing import ( import click from click.core import ParameterSource from mypy_extensions import mypyc_attr +from pathspec import PathSpec from pathspec.patterns.gitwildmatch import GitWildMatchPatternError from _black_version import version as __version__ @@ -61,7 +62,7 @@ from black.handle_ipynb_magics import ( unmask_cell, ) from black.linegen import LN, LineGenerator, transform_line -from black.lines import EmptyLineTracker, Line +from black.lines import EmptyLineTracker, LinesBlock from black.mode import ( FUTURE_FLAG_TO_FEATURE, VERSION_TO_FEATURES, @@ -218,8 +219,9 @@ def validate_regex( callback=target_version_option_callback, multiple=True, help=( - "Python versions that should be supported by Black's output. [default: per-file" - " auto-detection]" + "Python versions that should be supported by Black's output. By default, Black" + " will try to infer this from the project metadata in pyproject.toml. If this" + " does not yield conclusive results, Black will use per-file auto-detection." ), ) @click.option( @@ -243,11 +245,17 @@ def validate_regex( multiple=True, help=( "When processing Jupyter Notebooks, add the given magic to the list" - f" of known python-magics ({', '.join(PYTHON_CELL_MAGICS)})." + f" of known python-magics ({', '.join(sorted(PYTHON_CELL_MAGICS))})." " Useful for formatting cells with custom python magics." ), default=[], ) +@click.option( + "-x", + "--skip-source-first-line", + is_flag=True, + help="Skip the first line of the source code.", +) @click.option( "-S", "--skip-string-normalization", @@ -428,6 +436,7 @@ def main( # noqa: C901 pyi: bool, ipynb: bool, python_cell_magics: Sequence[str], + skip_source_first_line: bool, skip_string_normalization: bool, skip_magic_trailing_comma: bool, experimental_string_processing: bool, @@ -470,16 +479,20 @@ def main( # noqa: C901 ) normalized = [ - (source, source) - if source == "-" - else (normalize_path_maybe_ignore(Path(source), root), source) + ( + (source, source) + if source == "-" + else (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' + ( + f'"{_norm}"' + if _norm + else f'\033[31m"{source} (skipping - invalid)"\033[34m' + ) for _norm, source in normalized ] ) @@ -490,8 +503,10 @@ def main( # noqa: C901 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}'.", + ( + "Using configuration from user-level config at " + f"'{user_level_config}'." + ), fg="blue", ) elif config_source in ( @@ -501,6 +516,9 @@ def main( # noqa: C901 out("Using configuration from project root.", fg="blue") else: out(f"Using configuration in '{config}'.", fg="blue") + if ctx.default_map: + for param, value in ctx.default_map.items(): + out(f"{param}: {value}") error_msg = "Oh no! 💥 💔 💥" if ( @@ -528,6 +546,7 @@ def main( # noqa: C901 line_length=line_length, is_pyi=pyi, is_ipynb=ipynb, + skip_source_first_line=skip_source_first_line, string_normalization=not skip_string_normalization, magic_trailing_comma=not skip_magic_trailing_comma, experimental_string_processing=experimental_string_processing, @@ -617,6 +636,11 @@ def get_sources( sources: Set[Path] = set() root = ctx.obj["root"] + using_default_exclude = exclude is None + exclude = re_compile_maybe_verbose(DEFAULT_EXCLUDES) if exclude is None else exclude + gitignore: Optional[Dict[Path, PathSpec]] = None + root_gitignore = get_gitignore(root) + for s in src: if s == "-" and stdin_filename: p = Path(stdin_filename) @@ -650,16 +674,12 @@ def get_sources( sources.add(p) elif p.is_dir(): - if exclude is None: - exclude = re_compile_maybe_verbose(DEFAULT_EXCLUDES) - gitignore = get_gitignore(root) - p_gitignore = get_gitignore(p) - # No need to use p's gitignore if it is identical to root's gitignore - # (i.e. root and p point to the same directory). - if gitignore != p_gitignore: - gitignore += p_gitignore - else: - gitignore = None + p = root / normalize_path_maybe_ignore(p, ctx.obj["root"], report) + if using_default_exclude: + gitignore = { + root: root_gitignore, + p: get_gitignore(p), + } sources.update( gen_python_files( p.iterdir(), @@ -790,7 +810,10 @@ def format_file_in_place( mode = replace(mode, is_ipynb=True) then = datetime.utcfromtimestamp(src.stat().st_mtime) + header = b"" with open(src, "rb") as buf: + if mode.skip_source_first_line: + header = buf.readline() src_contents, encoding, newline = decode_bytes(buf.read()) try: dst_contents = format_file_contents(src_contents, fast=fast, mode=mode) @@ -800,6 +823,8 @@ def format_file_in_place( raise ValueError( f"File '{src}' cannot be parsed as valid Jupyter notebook." ) from None + src_contents = header.decode(encoding) + src_contents + dst_contents = header.decode(encoding) + dst_contents if write_back == WriteBack.YES: with open(src, "w", encoding=encoding, newline=newline) as f: @@ -901,9 +926,6 @@ def format_file_contents(src_contents: str, *, fast: bool, mode: Mode) -> FileCo valid by calling :func:`assert_equivalent` and :func:`assert_stable` on it. `mode` is passed to :func:`format_str`. """ - if not src_contents.strip(): - raise NothingChanged - if mode.is_ipynb: dst_contents = format_ipynb_string(src_contents, fast=fast, mode=mode) else: @@ -998,6 +1020,9 @@ def format_ipynb_string(src_contents: str, *, fast: bool, mode: Mode) -> FileCon Operate cell-by-cell, only on code cells, only for Python notebooks. If the ``.ipynb`` originally had a trailing newline, it'll be preserved. """ + if not src_contents: + raise NothingChanged + trailing_newline = src_contents[-1] == "\n" modified = False nb = json.loads(src_contents) @@ -1062,31 +1087,46 @@ def format_str(src_contents: str, *, mode: Mode) -> str: def _format_str_once(src_contents: str, *, mode: Mode) -> str: src_node = lib2to3_parse(src_contents.lstrip(), mode.target_versions) - dst_contents = [] + dst_blocks: List[LinesBlock] = [] 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) - 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 + context_manager_features = { + feature + for feature in {Feature.PARENTHESIZED_CONTEXT_MANAGERS} + if supports_feature(versions, feature) + } + normalize_fmt_off(src_node) + lines = LineGenerator(mode=mode, features=context_manager_features) + elt = EmptyLineTracker(mode=mode) split_line_features = { feature for feature in {Feature.TRAILING_COMMA_IN_CALL, Feature.TRAILING_COMMA_IN_DEF} if supports_feature(versions, feature) } + block: Optional[LinesBlock] = None for current_line in lines.visit(src_node): - dst_contents.append(str(empty_line) * after) - before, after = elt.maybe_empty_lines(current_line) - dst_contents.append(str(empty_line) * before) + block = elt.maybe_empty_lines(current_line) + dst_blocks.append(block) for line in transform_line( current_line, mode=mode, features=split_line_features ): - dst_contents.append(str(line)) + block.content_lines.append(str(line)) + if dst_blocks: + dst_blocks[-1].after = 0 + dst_contents = [] + for block in dst_blocks: + dst_contents.extend(block.all_lines()) + if not dst_contents: + # Use decode_bytes to retrieve the correct source newline (CRLF or LF), + # and check if normalized_content has more than one line + normalized_content, _, newline = decode_bytes(src_contents.encode("utf-8")) + if "\n" in normalized_content: + return newline + return "" return "".join(dst_contents) @@ -1122,6 +1162,10 @@ def get_features_used( # noqa: C901 - relaxed decorator syntax; - usage of __future__ flags (annotations); - print / exec statements; + - parenthesized context managers; + - match statements; + - except* clause; + - variadic generics; """ features: Set[Feature] = set() if future_imports: @@ -1197,6 +1241,23 @@ def get_features_used( # noqa: C901 ): features.add(Feature.ANN_ASSIGN_EXTENDED_RHS) + elif ( + n.type == syms.with_stmt + and len(n.children) > 2 + and n.children[1].type == syms.atom + ): + atom_children = n.children[1].children + if ( + len(atom_children) == 3 + and atom_children[0].type == token.LPAR + and atom_children[1].type == syms.testlist_gexp + and atom_children[2].type == token.RPAR + ): + features.add(Feature.PARENTHESIZED_CONTEXT_MANAGERS) + + elif n.type == syms.match_stmt: + features.add(Feature.PATTERN_MATCHING) + elif ( n.type == syms.except_clause and len(n.children) >= 2 @@ -1369,9 +1430,9 @@ def patch_click() -> None: for module in modules: if hasattr(module, "_verify_python3_env"): - module._verify_python3_env = lambda: None # type: ignore + module._verify_python3_env = lambda: None if hasattr(module, "_verify_python_env"): - module._verify_python_env = lambda: None # type: ignore + module._verify_python_env = lambda: None def patched_main() -> None: