X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/639b62dcd32cde3645e9f9a633eee33c04d23901..b07ca2b7d5d03f5d890c1ce5f19b41065ba815c4:/black.py?ds=sidebyside diff --git a/black.py b/black.py index e795fa3..58f7976 100644 --- a/black.py +++ b/black.py @@ -200,40 +200,52 @@ def main( return elif len(sources) == 1: - return_code = run_single_file_mode( - line_length, check, fast, quiet, write_back, sources[0] - ) + return_code = reformat_one(sources[0], line_length, fast, quiet, write_back) else: - return_code = run_multi_file_mode(line_length, fast, quiet, write_back, sources) + loop = asyncio.get_event_loop() + executor = ProcessPoolExecutor(max_workers=os.cpu_count()) + return_code = 1 + try: + return_code = loop.run_until_complete( + schedule_formatting( + sources, line_length, write_back, fast, quiet, loop, executor + ) + ) + finally: + shutdown(loop) ctx.exit(return_code) -def run_single_file_mode( - line_length: int, - check: bool, - fast: bool, - quiet: bool, - write_back: WriteBack, - src: Path, +def reformat_one( + src: Path, line_length: int, fast: bool, quiet: bool, write_back: WriteBack ) -> int: - report = Report(check=check, quiet=quiet) + """Reformat a single file under `src` without spawning child processes. + + If `quiet` is True, non-error messages are not output. `line_length`, + `write_back`, and `fast` options are passed to :func:`format_file_in_place`. + """ + report = Report(check=write_back is WriteBack.NO, quiet=quiet) try: + changed = Changed.NO if not src.is_file() and str(src) == "-": - changed = format_stdin_to_stdout( + if format_stdin_to_stdout( line_length=line_length, fast=fast, write_back=write_back - ) + ): + changed = Changed.YES else: - changed = Changed.NO cache: Cache = {} if write_back != WriteBack.DIFF: cache = read_cache() src = src.resolve() if src in cache and cache[src] == get_cache_info(src): changed = Changed.CACHED - if changed is not Changed.CACHED: - changed = format_file_in_place( + if ( + changed is not Changed.CACHED + and format_file_in_place( src, line_length=line_length, fast=fast, write_back=write_back ) + ): + changed = Changed.YES if write_back != WriteBack.DIFF and changed is not Changed.NO: write_cache(cache, [src]) report.done(src, changed) @@ -242,27 +254,6 @@ def run_single_file_mode( return report.return_code -def run_multi_file_mode( - line_length: int, - fast: bool, - quiet: bool, - write_back: WriteBack, - sources: List[Path], -) -> int: - loop = asyncio.get_event_loop() - executor = ProcessPoolExecutor(max_workers=os.cpu_count()) - return_code = 1 - try: - return_code = loop.run_until_complete( - schedule_formatting( - sources, line_length, write_back, fast, quiet, loop, executor - ) - ) - finally: - shutdown(loop) - return return_code - - async def schedule_formatting( sources: List[Path], line_length: int, @@ -302,8 +293,12 @@ async def schedule_formatting( for src in sources } _task_values = list(tasks.values()) - loop.add_signal_handler(signal.SIGINT, cancel, _task_values) - loop.add_signal_handler(signal.SIGTERM, cancel, _task_values) + try: + loop.add_signal_handler(signal.SIGINT, cancel, _task_values) + loop.add_signal_handler(signal.SIGTERM, cancel, _task_values) + except NotImplementedError: + # There are no good alternatives for these on Windows + pass await asyncio.wait(_task_values) for src, task in tasks.items(): if not task.done(): @@ -316,7 +311,7 @@ async def schedule_formatting( report.failed(src, str(task.exception())) else: formatted.append(src) - report.done(src, task.result()) + report.done(src, Changed.YES if task.result() else Changed.NO) if cancelled: await asyncio.gather(*cancelled, loop=loop, return_exceptions=True) @@ -337,7 +332,7 @@ def format_file_in_place( fast: bool, write_back: WriteBack = WriteBack.NO, lock: Any = None, # multiprocessing.Manager().Lock() is some crazy proxy -) -> Changed: +) -> bool: """Format file under `src` path. Return True if changed. If `write_back` is True, write reformatted code back to stdout. @@ -351,7 +346,7 @@ def format_file_in_place( src_contents, line_length=line_length, fast=fast ) except NothingChanged: - return Changed.NO + return False if write_back == write_back.YES: with open(src, "w", encoding=src_buffer.encoding) as f: @@ -367,12 +362,12 @@ def format_file_in_place( finally: if lock: lock.release() - return Changed.YES + return True def format_stdin_to_stdout( line_length: int, fast: bool, write_back: WriteBack = WriteBack.NO -) -> Changed: +) -> bool: """Format file on stdin. Return True if changed. If `write_back` is True, write reformatted code back to stdout. @@ -382,10 +377,10 @@ def format_stdin_to_stdout( dst = src try: dst = format_file_contents(src, line_length=line_length, fast=fast) - return Changed.YES + return True except NothingChanged: - return Changed.NO + return False finally: if write_back == WriteBack.YES: @@ -614,6 +609,8 @@ class BracketTracker: bracket_match: Dict[Tuple[Depth, NodeType], Leaf] = Factory(dict) delimiters: Dict[LeafID, Priority] = Factory(dict) previous: Optional[Leaf] = None + _for_loop_variable: bool = False + _lambda_arguments: bool = False def mark(self, leaf: Leaf) -> None: """Mark `leaf` with bracket-related metadata. Keep track of delimiters. @@ -633,6 +630,8 @@ class BracketTracker: if leaf.type == token.COMMENT: return + self.maybe_decrement_after_for_loop_variable(leaf) + self.maybe_decrement_after_lambda_arguments(leaf) if leaf.type in CLOSING_BRACKETS: self.depth -= 1 opening_bracket = self.bracket_match.pop((self.depth, leaf.type)) @@ -650,6 +649,8 @@ class BracketTracker: self.bracket_match[self.depth, BRACKET[leaf.type]] = leaf self.depth += 1 self.previous = leaf + self.maybe_increment_lambda_arguments(leaf) + self.maybe_increment_for_loop_variable(leaf) def any_open_brackets(self) -> bool: """Return True if there is an yet unmatched open bracket on the line.""" @@ -658,11 +659,55 @@ class BracketTracker: def max_delimiter_priority(self, exclude: Iterable[LeafID] = ()) -> int: """Return the highest priority of a delimiter found on the line. - Values are consistent with what `is_delimiter()` returns. + Values are consistent with what `is_split_*_delimiter()` return. Raises ValueError on no delimiters. """ return max(v for k, v in self.delimiters.items() if k not in exclude) + def maybe_increment_for_loop_variable(self, leaf: Leaf) -> bool: + """In a for loop, or comprehension, the variables are often unpacks. + + To avoid splitting on the comma in this situation, increase the depth of + tokens between `for` and `in`. + """ + if leaf.type == token.NAME and leaf.value == "for": + self.depth += 1 + self._for_loop_variable = True + return True + + return False + + def maybe_decrement_after_for_loop_variable(self, leaf: Leaf) -> bool: + """See `maybe_increment_for_loop_variable` above for explanation.""" + if self._for_loop_variable and leaf.type == token.NAME and leaf.value == "in": + self.depth -= 1 + self._for_loop_variable = False + return True + + return False + + def maybe_increment_lambda_arguments(self, leaf: Leaf) -> bool: + """In a lambda expression, there might be more than one argument. + + To avoid splitting on the comma in this situation, increase the depth of + tokens between `lambda` and `:`. + """ + if leaf.type == token.NAME and leaf.value == "lambda": + self.depth += 1 + self._lambda_arguments = True + return True + + return False + + def maybe_decrement_after_lambda_arguments(self, leaf: Leaf) -> bool: + """See `maybe_increment_lambda_arguments` above for explanation.""" + if self._lambda_arguments and leaf.type == token.COLON: + self.depth -= 1 + self._lambda_arguments = False + return True + + return False + @dataclass class Line: @@ -673,8 +718,6 @@ class Line: comments: List[Tuple[Index, Leaf]] = Factory(list) bracket_tracker: BracketTracker = Factory(BracketTracker) inside_brackets: bool = False - has_for: bool = False - _for_loop_variable: bool = False def append(self, leaf: Leaf, preformatted: bool = False) -> None: """Add a new `leaf` to the end of the line. @@ -695,10 +738,8 @@ class Line: # imports, for which we only preserve newlines. leaf.prefix += whitespace(leaf) if self.inside_brackets or not preformatted: - self.maybe_decrement_after_for_loop_variable(leaf) self.bracket_tracker.mark(leaf) self.maybe_remove_trailing_comma(leaf) - self.maybe_increment_for_loop_variable(leaf) if not self.append_comment(leaf): self.leaves.append(leaf) @@ -845,29 +886,6 @@ class Line: return False - def maybe_increment_for_loop_variable(self, leaf: Leaf) -> bool: - """In a for loop, or comprehension, the variables are often unpacks. - - To avoid splitting on the comma in this situation, increase the depth of - tokens between `for` and `in`. - """ - if leaf.type == token.NAME and leaf.value == "for": - self.has_for = True - self.bracket_tracker.depth += 1 - self._for_loop_variable = True - return True - - return False - - def maybe_decrement_after_for_loop_variable(self, leaf: Leaf) -> bool: - """See `maybe_increment_for_loop_variable` above for explanation.""" - if self._for_loop_variable and leaf.type == token.NAME and leaf.value == "in": - self.bracket_tracker.depth -= 1 - self._for_loop_variable = False - return True - - return False - def append_comment(self, comment: Leaf) -> bool: """Add an inline or standalone comment to the line.""" if ( @@ -1361,17 +1379,11 @@ def whitespace(leaf: Leaf) -> str: # noqa C901 if p.type in {syms.parameters, syms.arglist}: # untyped function signatures or calls - if t == token.RPAR: - return NO - if not prev or prev.type != token.COMMA: return NO elif p.type == syms.varargslist: # lambdas - if t == token.RPAR: - return NO - if prev and prev.type != token.COMMA: return NO @@ -1465,21 +1477,9 @@ def whitespace(leaf: Leaf) -> str: # noqa C901 # dots, but not the first one. return NO - elif ( - p.type == syms.listmaker - or p.type == syms.testlist_gexp - or p.type == syms.subscriptlist - ): - # list interior, including unpacking - if not prev: - return NO - elif p.type == syms.dictsetmaker: - # dict and set interior, including unpacking - if not prev: - return NO - - if prev.type == token.DOUBLESTAR: + # dict unpacking + if prev and prev.type == token.DOUBLESTAR: return NO elif p.type in {syms.factor, syms.star_expr}: @@ -1605,17 +1605,6 @@ def is_split_before_delimiter(leaf: Leaf, previous: Leaf = None) -> int: return 0 -def is_delimiter(leaf: Leaf, previous: Leaf = None) -> int: - """Return the priority of the `leaf` delimiter. Return 0 if not delimiter. - - Higher numbers are higher priority. - """ - return max( - is_split_before_delimiter(leaf, previous), - is_split_after_delimiter(leaf, previous), - ) - - def generate_comments(leaf: Leaf) -> Iterator[Leaf]: """Clean the prefix of the `leaf` and generate comments from it, if any. @@ -2174,6 +2163,11 @@ def is_vararg(leaf: Leaf, within: Set[NodeType]) -> bool: def max_delimiter_priority_in_atom(node: LN) -> int: + """Return maximum delimiter priority inside `node`. + + This is specific to atoms with contents contained in a pair of parentheses. + If `node` isn't an atom or there are no enclosing parentheses, returns 0. + """ if node.type != syms.atom: return 0