cast,
TYPE_CHECKING,
)
-from typing_extensions import Final
from mypy_extensions import mypyc_attr
from appdirs import user_cache_dir
from _black_version import version as __version__
+if sys.version_info < (3, 8):
+ from typing_extensions import Final
+else:
+ from typing import Final
+
if TYPE_CHECKING:
import colorama # noqa: F401
target_versions: Set[TargetVersion] = field(default_factory=set)
line_length: int = DEFAULT_LINE_LENGTH
string_normalization: bool = True
+ magic_trailing_comma: bool = True
experimental_string_processing: bool = False
is_pyi: bool = False
is_flag=True,
help="Don't normalize string quotes or prefixes.",
)
+@click.option(
+ "-C",
+ "--skip-magic-trailing-comma",
+ is_flag=True,
+ help="Don't use trailing commas as a reason to split lines.",
+)
@click.option(
"--experimental-string-processing",
is_flag=True,
fast: bool,
pyi: bool,
skip_string_normalization: bool,
+ skip_magic_trailing_comma: bool,
experimental_string_processing: bool,
quiet: bool,
verbose: bool,
line_length=line_length,
is_pyi=pyi,
string_normalization=not skip_string_normalization,
+ magic_trailing_comma=not skip_magic_trailing_comma,
experimental_string_processing=experimental_string_processing,
)
if config and verbose:
worker_count = os.cpu_count()
if sys.platform == "win32":
# Work around https://bugs.python.org/issue26903
- worker_count = min(worker_count, 61)
+ worker_count = min(worker_count, 60)
try:
executor = ProcessPoolExecutor(max_workers=worker_count)
except (ImportError, OSError):
versions = detect_target_versions(src_node)
normalize_fmt_off(src_node)
lines = LineGenerator(
+ mode=mode,
remove_u_prefix="unicode_literals" in future_imports
or supports_feature(versions, Feature.UNICODE_LITERALS),
- is_pyi=mode.is_pyi,
- normalize_strings=mode.string_normalization,
)
elt = EmptyLineTracker(is_pyi=mode.is_pyi)
- empty_line = Line()
+ empty_line = Line(mode=mode)
after = 0
split_line_features = {
feature
class Line:
"""Holds leaves and comments. Can be printed with `str(line)`."""
+ mode: Mode
depth: int = 0
leaves: List[Leaf] = field(default_factory=list)
# keys ordered like `leaves`
)
if self.inside_brackets or not preformatted:
self.bracket_tracker.mark(leaf)
- if self.maybe_should_explode(leaf):
- self.should_explode = True
+ if self.mode.magic_trailing_comma:
+ if self.has_magic_trailing_comma(leaf):
+ self.should_explode = True
+ elif self.has_magic_trailing_comma(leaf, ensure_removable=True):
+ self.remove_trailing_comma()
if not self.append_comment(leaf):
self.leaves.append(leaf)
def contains_multiline_strings(self) -> bool:
return any(is_multiline_string(leaf) for leaf in self.leaves)
- def maybe_should_explode(self, closing: Leaf) -> bool:
- """Return True if this line should explode (always be split), that is when:
- - there's a trailing comma here; and
- - it's not a one-tuple.
+ def has_magic_trailing_comma(
+ self, closing: Leaf, ensure_removable: bool = False
+ ) -> bool:
+ """Return True if we have a magic trailing comma, that is when:
+ - there's a trailing comma here
+ - it's not a one-tuple
+ Additionally, if ensure_removable:
+ - it's not from square bracket indexing
"""
if not (
closing.type in CLOSING_BRACKETS
):
return False
- if closing.type in {token.RBRACE, token.RSQB}:
+ if closing.type == token.RBRACE:
return True
+ if closing.type == token.RSQB:
+ if not ensure_removable:
+ return True
+ comma = self.leaves[-1]
+ return bool(comma.parent and comma.parent.type == syms.listmaker)
+
if self.is_import:
return True
def clone(self) -> "Line":
return Line(
+ mode=self.mode,
depth=self.depth,
inside_brackets=self.inside_brackets,
should_explode=self.should_explode,
in ways that will no longer stringify to valid Python code on the tree.
"""
- is_pyi: bool = False
- normalize_strings: bool = True
- current_line: Line = field(default_factory=Line)
+ mode: Mode
remove_u_prefix: bool = False
+ current_line: Line = field(init=False)
def line(self, indent: int = 0) -> Iterator[Line]:
"""Generate a line.
return # Line is empty, don't emit. Creating a new one unnecessary.
complete_line = self.current_line
- self.current_line = Line(depth=complete_line.depth + indent)
+ self.current_line = Line(mode=self.mode, depth=complete_line.depth + indent)
yield complete_line
def visit_default(self, node: LN) -> Iterator[Line]:
yield from self.line()
normalize_prefix(node, inside_brackets=any_open_brackets)
- if self.normalize_strings and node.type == token.STRING:
+ if self.mode.string_normalization and node.type == token.STRING:
normalize_string_prefix(node, remove_u_prefix=self.remove_u_prefix)
normalize_string_quotes(node)
if node.type == token.NUMBER:
def visit_suite(self, node: Node) -> Iterator[Line]:
"""Visit a suite."""
- if self.is_pyi and is_stub_suite(node):
+ if self.mode.is_pyi and is_stub_suite(node):
yield from self.visit(node.children[2])
else:
yield from self.visit_default(node)
"""Visit a statement without nested statements."""
is_suite_like = node.parent and node.parent.type in STATEMENT
if is_suite_like:
- if self.is_pyi and is_stub_body(node):
+ if self.mode.is_pyi and is_stub_body(node):
yield from self.visit_default(node)
else:
yield from self.line(+1)
yield from self.line(-1)
else:
- if not self.is_pyi or not node.parent or not is_stub_suite(node.parent):
+ if (
+ not self.mode.is_pyi
+ or not node.parent
+ or not is_stub_suite(node.parent)
+ ):
yield from self.line()
yield from self.visit_default(node)
def __post_init__(self) -> None:
"""You are in a twisty little maze of passages."""
+ self.current_line = Line(mode=self.mode)
+
v = self.visit_stmt
Ø: Set[str] = set()
self.visit_assert_stmt = partial(v, keywords={"assert"}, parens={"assert", ","})
# `StringSplitter` will break it down further if necessary.
string_value = LL[string_idx].value
string_line = Line(
+ mode=line.mode,
depth=line.depth + 1,
inside_brackets=True,
should_explode=line.should_explode,
If `is_body` is True, the result line is one-indented inside brackets and as such
has its first leaf's prefix normalized and a trailing comma added when expected.
"""
- result = Line(depth=original.depth)
+ result = Line(mode=original.mode, depth=original.depth)
if is_body:
result.inside_brackets = True
result.depth += 1
if bt.delimiter_count_with_priority(delimiter_priority) == 1:
raise CannotSplit("Splitting a single attribute from its owner looks wrong")
- current_line = Line(depth=line.depth, inside_brackets=line.inside_brackets)
+ current_line = Line(
+ mode=line.mode, depth=line.depth, inside_brackets=line.inside_brackets
+ )
lowest_depth = sys.maxsize
trailing_comma_safe = True
except ValueError:
yield current_line
- current_line = Line(depth=line.depth, inside_brackets=line.inside_brackets)
+ current_line = Line(
+ mode=line.mode, depth=line.depth, inside_brackets=line.inside_brackets
+ )
current_line.append(leaf)
for leaf in line.leaves:
if leaf_priority == delimiter_priority:
yield current_line
- current_line = Line(depth=line.depth, inside_brackets=line.inside_brackets)
+ current_line = Line(
+ mode=line.mode, depth=line.depth, inside_brackets=line.inside_brackets
+ )
if current_line:
if (
trailing_comma_safe
if not line.contains_standalone_comments(0):
raise CannotSplit("Line does not have any standalone comments")
- current_line = Line(depth=line.depth, inside_brackets=line.inside_brackets)
+ current_line = Line(
+ mode=line.mode, depth=line.depth, inside_brackets=line.inside_brackets
+ )
def append_to_line(leaf: Leaf) -> Iterator[Line]:
"""Append `leaf` to current line or to new line if appending impossible."""
except ValueError:
yield current_line
- current_line = Line(depth=line.depth, inside_brackets=line.inside_brackets)
+ current_line = Line(
+ line.mode, depth=line.depth, inside_brackets=line.inside_brackets
+ )
current_line.append(leaf)
for leaf in line.leaves:
return False
return max_priority == COMMA_PRIORITY and (
- trailing_comma
+ (line.mode.magic_trailing_comma and trailing_comma)
# always explode imports
or opening_bracket.parent.type in {syms.atom, syms.import_from}
)
projects / etc / vim.git / blobdiff