MutableMapping,
Optional,
Pattern,
+ Sequence,
Set,
Sized,
Tuple,
)
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.lines import Line, EmptyLineTracker
from black.linegen import transform_line, LineGenerator, LN
from black.comments import normalize_fmt_off
-from black.mode import Mode, TargetVersion
+from black.mode import FUTURE_FLAG_TO_FEATURE, Mode, TargetVersion
from black.mode import Feature, supports_feature, VERSION_TO_FEATURES
from black.cache import read_cache, write_cache, get_cache_info, filter_cached, Cache
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
"(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",
"--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(
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(
help="Read configuration from FILE path.",
)
@click.pass_context
-def main(
+def main( # noqa: C901
ctx: click.Context,
code: Optional[str],
line_length: int,
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],
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__}`!"
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:
)
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)
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
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
sources.update(
gen_python_files(
p.iterdir(),
- root,
+ ctx.obj["root"],
include,
exclude,
extend_exclude,
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:
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.
"""
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
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
)
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
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:
- versions = detect_target_versions(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
return tiow.read(), encoding, newline
-def get_features_used(node: Node) -> Set[Feature]: # noqa: C901
+def get_features_used( # noqa: C901
+ node: Node, *, future_imports: Optional[Set[str]] = None
+) -> Set[Feature]:
"""Return a set of (relatively) new Python features used in this file.
Currently looking for:
- positional only arguments in function signatures and lambdas;
- assignment expression;
- relaxed decorator syntax;
+ - usage of __future__ flags (annotations);
- print / exec statements;
"""
features: Set[Feature] = set()
+ if future_imports:
+ features |= {
+ FUTURE_FLAG_TO_FEATURE[future_import]
+ for future_import in future_imports
+ if future_import in FUTURE_FLAG_TO_FEATURE
+ }
+
for n in node.pre_order():
- if n.type == token.STRING:
- value_head = n.value[:2] # type: ignore
+ if is_string_token(n):
+ value_head = n.value[:2]
if value_head in {'f"', 'F"', "f'", "F'", "rf", "fr", "RF", "FR"}:
features.add(Feature.F_STRINGS)
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 {
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)
+ elif (
+ n.type in {syms.return_stmt, syms.yield_expr}
+ and len(n.children) >= 2
+ and n.children[1].type == syms.testlist_star_expr
+ and any(child.type == syms.star_expr for child in n.children[1].children)
+ ):
+ features.add(Feature.UNPACKING_ON_FLOW)
+
+ elif (
+ n.type == syms.annassign
+ and len(n.children) >= 4
+ and n.children[3].type == syms.testlist_star_expr
+ ):
+ features.add(Feature.ANN_ASSIGN_EXTENDED_RHS)
return features
-def detect_target_versions(node: Node) -> Set[TargetVersion]:
+def detect_target_versions(
+ node: Node, *, future_imports: Optional[Set[str]] = None
+) -> Set[TargetVersion]:
"""Detect the version to target based on the nodes used."""
- features = get_features_used(node)
+ features = get_features_used(node, future_imports=future_imports)
return {
version for version in TargetVersion if features <= VERSION_TO_FEATURES[version]
}
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(
- "cannot use --safe with this file; failed to parse source file."
+ "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:
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
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),
projects / etc / vim.git / blobdiff