X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/d8fa8df0526de9c0968e0a3568008f58eae45364..7ae084aaa13b8c1b66410de44f0b9f86ab798c5c:/black.py diff --git a/black.py b/black.py index 9938b37..a4f3688 100644 --- a/black.py +++ b/black.py @@ -51,14 +51,18 @@ from blib2to3.pgen2 import driver, token from blib2to3.pgen2.grammar import Grammar from blib2to3.pgen2.parse import ParseError +from _version import get_versions + +v = get_versions() +__version__ = v.get("closest-tag", v["version"]) +__git_version__ = v.get("full-revisionid") -__version__ = "19.3b0" DEFAULT_LINE_LENGTH = 88 DEFAULT_EXCLUDES = ( r"/(\.eggs|\.git|\.hg|\.mypy_cache|\.nox|\.tox|\.venv|_build|buck-out|build|dist)/" ) DEFAULT_INCLUDES = r"\.pyi?$" -CACHE_DIR = Path(user_cache_dir("black", version=__version__)) +CACHE_DIR = Path(user_cache_dir("black", version=__git_version__)) # types @@ -143,6 +147,7 @@ class Feature(Enum): ASYNC_IDENTIFIERS = 6 ASYNC_KEYWORDS = 7 ASSIGNMENT_EXPRESSIONS = 8 + POS_ONLY_ARGUMENTS = 9 VERSION_TO_FEATURES: Dict[TargetVersion, Set[Feature]] = { @@ -178,6 +183,7 @@ VERSION_TO_FEATURES: Dict[TargetVersion, Set[Feature]] = { Feature.TRAILING_COMMA_IN_DEF, Feature.ASYNC_KEYWORDS, Feature.ASSIGNMENT_EXPRESSIONS, + Feature.POS_ONLY_ARGUMENTS, }, } @@ -431,6 +437,7 @@ def main( report = Report(check=check, quiet=quiet, verbose=verbose) root = find_project_root(src) sources: Set[Path] = set() + path_empty(src, quiet, verbose, ctx) for s in src: p = Path(s) if p.is_dir(): @@ -444,7 +451,7 @@ def main( err(f"invalid path: {s}") if len(sources) == 0: if verbose or not quiet: - out("No paths given. Nothing to do 😴") + out("No Python files are present to be formatted. Nothing to do 😴") ctx.exit(0) if len(sources) == 1: @@ -466,6 +473,16 @@ def main( ctx.exit(report.return_code) +def path_empty(src: Tuple[str], quiet: bool, verbose: bool, ctx: click.Context) -> None: + """ + Exit if there is no `src` provided for formatting + """ + if not src: + if verbose or not quiet: + out("No Path provided. Nothing to do 😴") + ctx.exit(0) + + def reformat_one( src: Path, fast: bool, write_back: WriteBack, mode: FileMode, report: "Report" ) -> None: @@ -935,6 +952,7 @@ MATH_OPERATORS = { token.DOUBLESTAR, } STARS = {token.STAR, token.DOUBLESTAR} +VARARGS_SPECIALS = STARS | {token.SLASH} VARARGS_PARENTS = { syms.arglist, syms.argument, # double star in arglist @@ -1278,7 +1296,7 @@ class Line: return True return False - def contains_inner_type_comments(self) -> bool: + def contains_uncollapsable_type_comments(self) -> bool: ignored_ids = set() try: last_leaf = self.leaves[-1] @@ -1295,13 +1313,19 @@ class Line: except IndexError: return False + # A type comment is uncollapsable if it is attached to a leaf + # that isn't at the end of the line (since that could cause it + # to get associated to a different argument) or if there are + # comments before it (since that could cause it to get hidden + # behind a comment. + comment_seen = False for leaf_id, comments in self.comments.items(): - if leaf_id in ignored_ids: - continue - for comment in comments: if is_type_comment(comment): - return True + if leaf_id not in ignored_ids or comment_seen: + return True + + comment_seen = True return False @@ -1477,7 +1501,13 @@ class EmptyLineTracker: lines (two on module-level). """ before, after = self._maybe_empty_lines(current_line) - before -= self.previous_after + before = ( + # Black should not insert empty lines at the beginning + # of the file + 0 + if self.previous_line is None + else before - self.previous_after + ) self.previous_after = after self.previous_line = current_line return before, after @@ -1847,7 +1877,7 @@ def whitespace(leaf: Leaf, *, complex_subscript: bool) -> str: # noqa: C901 # that, too. return prevp.prefix - elif prevp.type in STARS: + elif prevp.type in VARARGS_SPECIALS: if is_vararg(prevp, within=VARARGS_PARENTS | UNPACKING_PARENTS): return NO @@ -1937,7 +1967,7 @@ def whitespace(leaf: Leaf, *, complex_subscript: bool) -> str: # noqa: C901 if not prevp or prevp.type == token.LPAR: return NO - elif prev.type in {token.EQUAL} | STARS: + elif prev.type in {token.EQUAL} | VARARGS_SPECIALS: return NO elif p.type == syms.decorator: @@ -2304,7 +2334,7 @@ def split_line( line_str = str(line).strip("\n") if ( - not line.contains_inner_type_comments() + not line.contains_uncollapsable_type_comments() and not line.should_explode and is_line_short_enough(line, line_length=line_length, line_str=line_str) ): @@ -2869,7 +2899,15 @@ def normalize_invisible_parens(node: Node, parens_after: Set[str]) -> None: if is_walrus_assignment(child): continue if child.type == syms.atom: - if maybe_make_parens_invisible_in_atom(child, parent=node): + # Determines if the underlying atom should be surrounded with + # invisible params - also makes parens invisible recursively + # within the atom and removes repeated invisible parens within + # the atom + should_surround_with_parens = maybe_make_parens_invisible_in_atom( + child, parent=node + ) + + if should_surround_with_parens: lpar = Leaf(token.LPAR, "") rpar = Leaf(token.RPAR, "") index = child.remove() or 0 @@ -2986,6 +3024,8 @@ def generate_ignored_nodes(leaf: Leaf) -> Iterator[LN]: def maybe_make_parens_invisible_in_atom(node: LN, parent: LN) -> bool: """If it's safe, make the parens in the atom `node` invisible, recursively. + Additionally, remove repeated, adjacent invisible parens from the atom `node` + as they are redundant. Returns whether the node should itself be wrapped in invisible parentheses. @@ -3002,16 +3042,40 @@ def maybe_make_parens_invisible_in_atom(node: LN, parent: LN) -> bool: first = node.children[0] last = node.children[-1] if first.type == token.LPAR and last.type == token.RPAR: + middle = node.children[1] # make parentheses invisible first.value = "" # type: ignore last.value = "" # type: ignore - if len(node.children) > 1: - maybe_make_parens_invisible_in_atom(node.children[1], parent=parent) + maybe_make_parens_invisible_in_atom(middle, parent=parent) + + if is_atom_with_invisible_parens(middle): + # Strip the invisible parens from `middle` by replacing + # it with the child in-between the invisible parens + middle.replace(middle.children[1]) + return False return True +def is_atom_with_invisible_parens(node: LN) -> bool: + """Given a `LN`, determines whether it's an atom `node` with invisible + parens. Useful in dedupe-ing and normalizing parens. + """ + if isinstance(node, Leaf) or node.type != syms.atom: + return False + + first, last = node.children[0], node.children[-1] + return ( + isinstance(first, Leaf) + and first.type == token.LPAR + and first.value == "" + and isinstance(last, Leaf) + and last.type == token.RPAR + and last.value == "" + ) + + def is_empty_tuple(node: LN) -> bool: """Return True if `node` holds an empty tuple.""" return ( @@ -3086,7 +3150,7 @@ def is_vararg(leaf: Leaf, within: Set[NodeType]) -> bool: extended iterable unpacking (PEP 3132) and additional unpacking generalizations (PEP 448). """ - if leaf.type not in STARS or not leaf.parent: + if leaf.type not in VARARGS_SPECIALS or not leaf.parent: return False p = leaf.parent @@ -3201,8 +3265,9 @@ def get_features_used(node: Node) -> Set[Feature]: Currently looking for: - f-strings; - - underscores in numeric literals; and - - trailing commas after * or ** in function signatures and calls. + - underscores in numeric literals; + - trailing commas after * or ** in function signatures and calls; + - positional only arguments in function signatures and lambdas; """ features: Set[Feature] = set() for n in node.pre_order(): @@ -3215,6 +3280,10 @@ def get_features_used(node: Node) -> Set[Feature]: if "_" in n.value: # type: ignore features.add(Feature.NUMERIC_UNDERSCORES) + elif n.type == token.SLASH: + if n.parent and n.parent.type in {syms.typedargslist, syms.arglist}: + features.add(Feature.POS_ONLY_ARGUMENTS) + elif n.type == token.COLONEQUAL: features.add(Feature.ASSIGNMENT_EXPRESSIONS)