| # SPDX-License-Identifier: Apache-2.0 |
| # Copyright 2024 The Meson development team |
| |
| from __future__ import annotations |
| |
| import re |
| import typing as T |
| from configparser import ConfigParser, MissingSectionHeaderError, ParsingError |
| from copy import deepcopy |
| from dataclasses import dataclass, field, fields, asdict |
| from pathlib import Path |
| import sys |
| |
| from . import mparser |
| from .mesonlib import MesonException |
| from .ast.postprocess import AstConditionLevel |
| from .ast.printer import RawPrinter |
| from .ast.visitor import FullAstVisitor |
| from .environment import build_filename |
| |
| if T.TYPE_CHECKING: |
| import argparse |
| from typing_extensions import Literal |
| |
| |
| class DefaultConfigParser(ConfigParser): |
| |
| def __init__(self, delimiters: T.Tuple[str, ...] = ('=', ':')): |
| super().__init__(delimiters=delimiters, interpolation=None) |
| |
| def read_default(self, filename: Path) -> None: |
| if not filename.exists(): |
| raise MesonException(f'Configuration file {filename} not found') |
| try: |
| super().read(filename, encoding='utf-8') |
| except MissingSectionHeaderError: |
| self.read_string(f'[{self.default_section}]\n' + filename.read_text(encoding='utf-8')) |
| |
| def getstr(self, section: str, key: str, fallback: T.Optional[str] = None) -> T.Optional[str]: |
| value: T.Optional[str] = self.get(section, key, fallback=fallback) |
| if value: |
| value = value.strip('"').strip("'") |
| return value |
| |
| |
| def match_path(filename: str, pattern: str) -> bool: |
| '''recursive glob match for editorconfig sections''' |
| index = 0 |
| num_ranges: T.List[T.Tuple[int, int]] = [] |
| |
| def curl_replace(m: re.Match) -> str: |
| nonlocal index |
| |
| if '\\.\\.' in m[1]: |
| index += 1 |
| low, high = m[1].split('\\.\\.') |
| num_ranges.append((int(low), int(high))) |
| return f'(?P<num{index}>-?[0-9]+)' |
| else: |
| return T.cast(str, m[1].replace(',', '|')) |
| |
| pattern_re = pattern.replace('.', '\\.') |
| pattern_re = re.sub(r'(?<!\\)\?', '.', pattern_re) # ? -> . |
| pattern_re = re.sub(r'(?<![\\\*])\*(?!\*)', '([^/]*)', pattern_re) # * -> ([^/]*) |
| pattern_re = re.sub(r'(?<!\\)\*\*', '(.*)', pattern_re) # ** -> (.*) |
| pattern_re = re.sub(r'(?<!\\)\[!(.*?[^\\])\]', r'([^\1])', pattern_re) # [!name] -> [^name] |
| pattern_re = re.sub(r'(?<!\\)\{(.*?[^\\])}', curl_replace, pattern_re) # {} |
| if pattern.startswith('/'): |
| pattern_re = '^' + pattern_re |
| pattern_re += '$' |
| |
| m = re.search(pattern_re, filename) |
| if m is None: |
| return False |
| |
| for i in range(index): |
| try: |
| val = int(m[f'num{i+1}']) |
| if not num_ranges[i][0] <= val <= num_ranges[i][1]: |
| return False |
| except ValueError: |
| return False |
| |
| return True |
| |
| |
| @dataclass |
| class EditorConfig: |
| |
| indent_style: T.Optional[Literal['space', 'tab']] = field(default=None, metadata={'getter': DefaultConfigParser.get}) |
| indent_size: T.Optional[int] = field(default=None, metadata={'getter': DefaultConfigParser.getint}) |
| tab_width: T.Optional[int] = field(default=None, metadata={'getter': DefaultConfigParser.getint}) |
| end_of_line: T.Optional[Literal['lf', 'cr', 'crlf']] = field(default=None, metadata={'getter': DefaultConfigParser.get}) |
| charset: T.Optional[Literal['latin1', 'utf-8', 'utf-8-bom', 'utf-16be', 'utf-16le']] = field(default=None, metadata={'getter': DefaultConfigParser.get}) |
| trim_trailing_whitespace: T.Optional[bool] = field(default=None, metadata={'getter': DefaultConfigParser.getboolean}) |
| insert_final_newline: T.Optional[bool] = field(default=None, metadata={'getter': DefaultConfigParser.getboolean}) |
| max_line_length: T.Optional[T.Union[Literal['off'], int]] = field(default=None, metadata={'getter': DefaultConfigParser.get}) |
| |
| |
| @dataclass |
| class FormatterConfig: |
| |
| # Config keys compatible with muon |
| max_line_length: T.Optional[int] = field( |
| default=None, |
| metadata={'getter': DefaultConfigParser.getint, |
| 'default': 80, |
| }) |
| indent_by: T.Optional[str] = field( |
| default=None, |
| metadata={'getter': DefaultConfigParser.getstr, |
| 'default': ' ', |
| }) |
| space_array: T.Optional[bool] = field( |
| default=None, |
| metadata={'getter': DefaultConfigParser.getboolean, |
| 'default': False, |
| }) |
| kwargs_force_multiline: T.Optional[bool] = field( |
| default=None, # kwa_ml |
| metadata={'getter': DefaultConfigParser.getboolean, |
| 'default': False, |
| }) |
| wide_colon: T.Optional[bool] = field( |
| default=None, |
| metadata={'getter': DefaultConfigParser.getboolean, |
| 'default': False, |
| }) |
| no_single_comma_function: T.Optional[bool] = field( |
| default=None, |
| metadata={'getter': DefaultConfigParser.getboolean, |
| 'default': False, |
| }) |
| |
| # Additional config keys |
| end_of_line: T.Optional[Literal['cr', 'lf', 'crlf', 'native']] = field( |
| default=None, |
| metadata={'getter': DefaultConfigParser.getstr, |
| 'default': 'native', |
| }) |
| indent_before_comments: T.Optional[str] = field( |
| default=None, |
| metadata={'getter': DefaultConfigParser.getstr, |
| 'default': ' ', |
| }) |
| simplify_string_literals: T.Optional[bool] = field( |
| default=None, |
| metadata={'getter': DefaultConfigParser.getboolean, |
| 'default': True, |
| }) |
| insert_final_newline: T.Optional[bool] = field( |
| default=None, |
| metadata={'getter': DefaultConfigParser.getboolean, |
| 'default': True, |
| }) |
| tab_width: T.Optional[int] = field( |
| default=None, |
| metadata={'getter': DefaultConfigParser.getint, |
| 'default': 4, |
| } |
| ) |
| sort_files: T.Optional[bool] = field( |
| default=None, |
| metadata={'getter': DefaultConfigParser.getboolean, |
| 'default': True, |
| }) |
| group_arg_value: T.Optional[bool] = field( |
| default=None, |
| metadata={'getter': DefaultConfigParser.getboolean, |
| 'default': False, |
| }) |
| use_editor_config: T.Optional[bool] = field( |
| default=None, |
| metadata={'getter': DefaultConfigParser.getboolean, |
| 'default': False, |
| }) |
| |
| @classmethod |
| def default(cls) -> FormatterConfig: |
| defaults = {f.name: f.metadata['default'] for f in fields(cls)} |
| return cls(**defaults) |
| |
| def update(self, config: FormatterConfig) -> FormatterConfig: |
| """Returns copy of self updated with other config""" |
| new_config = deepcopy(self) |
| for key, value in asdict(config).items(): |
| if value is not None: |
| setattr(new_config, key, value) |
| return new_config |
| |
| def with_editorconfig(self, editorconfig: EditorConfig) -> FormatterConfig: |
| """Returns copy of self updated with editorconfig""" |
| config = deepcopy(self) |
| |
| if editorconfig.indent_style == 'space': |
| indent_size = editorconfig.indent_size or 4 |
| config.indent_by = indent_size * ' ' |
| elif editorconfig.indent_style == 'tab': |
| config.indent_by = '\t' |
| elif editorconfig.indent_size: |
| config.indent_by = editorconfig.indent_size * ' ' |
| |
| if editorconfig.max_line_length == 'off': |
| config.max_line_length = 0 |
| elif editorconfig.max_line_length: |
| config.max_line_length = int(editorconfig.max_line_length) |
| |
| if editorconfig.end_of_line: |
| config.end_of_line = editorconfig.end_of_line |
| if editorconfig.insert_final_newline: |
| config.insert_final_newline = editorconfig.insert_final_newline |
| if editorconfig.tab_width: |
| config.tab_width = editorconfig.tab_width |
| |
| return config |
| |
| @property |
| def newline(self) -> T.Optional[str]: |
| if self.end_of_line == 'crlf': |
| return '\r\n' |
| if self.end_of_line == 'lf': |
| return '\n' |
| if self.end_of_line == 'cr': |
| return '\r' |
| return None |
| |
| |
| class MultilineArgumentDetector(FullAstVisitor): |
| |
| def __init__(self, config: FormatterConfig): |
| self.config = config |
| self.is_multiline = False |
| |
| def enter_node(self, node: mparser.BaseNode) -> None: |
| if node.whitespaces and '#' in node.whitespaces.value: |
| self.is_multiline = True |
| |
| elif isinstance(node, mparser.StringNode) and node.is_multiline: |
| self.is_multiline = True |
| |
| def visit_ArgumentNode(self, node: mparser.ArgumentNode) -> None: |
| if node.is_multiline: |
| self.is_multiline = True |
| |
| if self.is_multiline: |
| return |
| |
| if self.config.kwargs_force_multiline and node.kwargs: |
| self.is_multiline = True |
| |
| super().visit_ArgumentNode(node) |
| |
| |
| class TrimWhitespaces(FullAstVisitor): |
| |
| def __init__(self, config: FormatterConfig): |
| self.config = config |
| |
| self.in_block_comments = False |
| self.in_arguments = 0 |
| self.indent_comments = '' |
| |
| def visit_default_func(self, node: mparser.BaseNode) -> None: |
| self.enter_node(node) |
| node.whitespaces.accept(self) |
| |
| def enter_node(self, node: mparser.BaseNode) -> None: |
| if isinstance(node, mparser.WhitespaceNode): |
| return |
| if not node.whitespaces: |
| # Ensure every node has a whitespace node |
| node.whitespaces = mparser.WhitespaceNode(mparser.Token('whitespace', node.filename, 0, 0, 0, (0, 0), '')) |
| node.whitespaces.condition_level = node.condition_level |
| |
| def exit_node(self, node: mparser.BaseNode) -> None: |
| pass |
| |
| def move_whitespaces(self, from_node: mparser.BaseNode, to_node: mparser.BaseNode) -> None: |
| to_node.whitespaces.value = from_node.whitespaces.value + to_node.whitespaces.value |
| to_node.whitespaces.is_continuation = from_node.whitespaces.is_continuation |
| from_node.whitespaces = None |
| to_node.whitespaces.accept(self) |
| |
| def add_space_after(self, node: mparser.BaseNode) -> None: |
| if not node.whitespaces.value: |
| node.whitespaces.value = ' ' |
| |
| def add_nl_after(self, node: mparser.BaseNode, force: bool = False) -> None: |
| if not node.whitespaces.value: |
| node.whitespaces.value = '\n' |
| elif force and not node.whitespaces.value.endswith('\n'): |
| node.whitespaces.value += '\n' |
| |
| def dedent(self, value: str) -> str: |
| if value.endswith(self.config.indent_by): |
| value = value[:-len(self.config.indent_by)] |
| return value |
| |
| def sort_arguments(self, node: mparser.ArgumentNode) -> None: |
| # TODO: natsort |
| def sort_key(arg: mparser.BaseNode) -> str: |
| if isinstance(arg, mparser.StringNode): |
| return arg.raw_value |
| return getattr(node, 'value', '') |
| |
| node.arguments.sort(key=sort_key) |
| |
| def visit_EmptyNode(self, node: mparser.EmptyNode) -> None: |
| self.enter_node(node) |
| self.in_block_comments = True |
| node.whitespaces.accept(self) |
| self.in_block_comments = False |
| |
| def visit_WhitespaceNode(self, node: mparser.WhitespaceNode) -> None: |
| lines = node.value.splitlines(keepends=True) |
| node.value = '' |
| in_block_comments = self.in_block_comments |
| with_comments = ['#' in line for line in lines] + [False] |
| for i, line in enumerate(lines): |
| has_nl = line.endswith('\n') |
| line = line.strip() |
| if line.startswith('\\'): |
| node.value += ' ' # add space before \ |
| node.is_continuation = True |
| elif line.startswith('#'): |
| if not in_block_comments: |
| node.value += self.config.indent_before_comments |
| else: |
| node.value += self.indent_comments |
| node.value += line |
| if has_nl and (line or with_comments[i+1] or not self.in_arguments): |
| node.value += '\n' |
| in_block_comments = True |
| if node.value.endswith('\n'): |
| node.value += self.indent_comments |
| if node.is_continuation: |
| node.value += self.config.indent_by |
| |
| def visit_SymbolNode(self, node: mparser.SymbolNode) -> None: |
| super().visit_SymbolNode(node) |
| if node.value in "([{" and node.whitespaces.value == '\n': |
| node.whitespaces.value = '' |
| |
| def visit_StringNode(self, node: mparser.StringNode) -> None: |
| self.enter_node(node) |
| |
| if self.config.simplify_string_literals: |
| if node.is_multiline and not any(x in node.value for x in ['\n', "'"]): |
| node.is_multiline = False |
| node.value = node.escape() |
| |
| if node.is_fstring and '@' not in node.value: |
| node.is_fstring = False |
| |
| self.exit_node(node) |
| |
| def visit_UnaryOperatorNode(self, node: mparser.UnaryOperatorNode) -> None: |
| super().visit_UnaryOperatorNode(node) |
| self.move_whitespaces(node.value, node) |
| |
| def visit_NotNode(self, node: mparser.NotNode) -> None: |
| super().visit_UnaryOperatorNode(node) |
| if not node.operator.whitespaces.value: |
| node.operator.whitespaces.value = ' ' |
| self.move_whitespaces(node.value, node) |
| |
| def visit_BinaryOperatorNode(self, node: mparser.BinaryOperatorNode) -> None: |
| super().visit_BinaryOperatorNode(node) |
| self.add_space_after(node.left) |
| self.add_space_after(node.operator) |
| self.move_whitespaces(node.right, node) |
| |
| def visit_ArrayNode(self, node: mparser.ArrayNode) -> None: |
| super().visit_ArrayNode(node) |
| self.move_whitespaces(node.rbracket, node) |
| |
| if node.lbracket.whitespaces.value: |
| node.args.is_multiline = True |
| if node.args.arguments and not node.args.is_multiline and self.config.space_array: |
| self.add_space_after(node.lbracket) |
| self.add_space_after(node.args) |
| if not node.args.arguments: |
| self.move_whitespaces(node.lbracket, node.args) |
| |
| def visit_DictNode(self, node: mparser.DictNode) -> None: |
| super().visit_DictNode(node) |
| self.move_whitespaces(node.rcurl, node) |
| |
| if node.lcurl.whitespaces.value: |
| node.args.is_multiline = True |
| |
| def visit_CodeBlockNode(self, node: mparser.CodeBlockNode) -> None: |
| self.enter_node(node) |
| if node.pre_whitespaces: |
| self.in_block_comments = True |
| node.pre_whitespaces.accept(self) |
| self.in_block_comments = False |
| else: |
| node.pre_whitespaces = mparser.WhitespaceNode(mparser.Token('whitespace', node.filename, 0, 0, 0, (0, 0), '')) |
| node.pre_whitespaces.block_indent = True |
| |
| for i in node.lines: |
| i.accept(self) |
| self.exit_node(node) |
| |
| if node.lines: |
| self.move_whitespaces(node.lines[-1], node) |
| else: |
| node.whitespaces.value = node.pre_whitespaces.value + node.whitespaces.value |
| node.pre_whitespaces.value = '' |
| self.in_block_comments = True |
| node.whitespaces.accept(self) |
| self.in_block_comments = False |
| |
| if node.condition_level == 0 and self.config.insert_final_newline: |
| self.add_nl_after(node, force=True) |
| |
| indent = node.condition_level * self.config.indent_by |
| if indent and node.lines: |
| node.pre_whitespaces.value += indent |
| for line in node.lines[:-1]: |
| line.whitespaces.value += indent |
| |
| def visit_IndexNode(self, node: mparser.IndexNode) -> None: |
| super().visit_IndexNode(node) |
| self.move_whitespaces(node.rbracket, node) |
| |
| def visit_MethodNode(self, node: mparser.MethodNode) -> None: |
| super().visit_MethodNode(node) |
| self.move_whitespaces(node.rpar, node) |
| |
| if node.lpar.whitespaces.value: |
| node.args.is_multiline = True |
| |
| def visit_FunctionNode(self, node: mparser.FunctionNode) -> None: |
| if node.func_name.value == 'files': |
| if self.config.sort_files: |
| self.sort_arguments(node.args) |
| |
| if len(node.args.arguments) == 1 and not node.args.kwargs: |
| arg = node.args.arguments[0] |
| if isinstance(arg, mparser.ArrayNode): |
| if not arg.lbracket.whitespaces or not arg.lbracket.whitespaces.value.strip(): |
| # files([...]) -> files(...) |
| node.args = arg.args |
| |
| super().visit_FunctionNode(node) |
| self.move_whitespaces(node.rpar, node) |
| |
| if node.lpar.whitespaces.value: |
| node.args.is_multiline = True |
| |
| def visit_AssignmentNode(self, node: mparser.AssignmentNode) -> None: |
| super().visit_AssignmentNode(node) |
| self.add_space_after(node.var_name) |
| self.add_space_after(node.operator) |
| self.move_whitespaces(node.value, node) |
| |
| def visit_ForeachClauseNode(self, node: mparser.ForeachClauseNode) -> None: |
| super().visit_ForeachClauseNode(node) |
| self.add_space_after(node.foreach_) |
| self.add_space_after(node.varnames[-1]) |
| for comma in node.commas: |
| self.add_space_after(comma) |
| self.add_space_after(node.colon) |
| |
| node.block.whitespaces.value += node.condition_level * self.config.indent_by |
| node.block.whitespaces.block_indent = True |
| |
| self.move_whitespaces(node.endforeach, node) |
| |
| def visit_IfClauseNode(self, node: mparser.IfClauseNode) -> None: |
| super().visit_IfClauseNode(node) |
| self.move_whitespaces(node.endif, node) |
| |
| for if_node in node.ifs: |
| if_node.whitespaces.value += node.condition_level * self.config.indent_by |
| if isinstance(node.elseblock, mparser.ElseNode): |
| node.elseblock.whitespaces.value += node.condition_level * self.config.indent_by |
| |
| def visit_IfNode(self, node: mparser.IfNode) -> None: |
| super().visit_IfNode(node) |
| self.add_space_after(node.if_) |
| self.in_block_comments = True |
| self.move_whitespaces(node.block, node) |
| self.in_block_comments = False |
| node.whitespaces.condition_level = node.condition_level + 1 |
| node.whitespaces.block_indent = True |
| |
| def visit_ElseNode(self, node: mparser.ElseNode) -> None: |
| super().visit_ElseNode(node) |
| self.in_block_comments = True |
| self.move_whitespaces(node.block, node) |
| self.in_block_comments = False |
| node.whitespaces.condition_level = node.condition_level + 1 |
| node.whitespaces.block_indent = True |
| |
| def visit_TernaryNode(self, node: mparser.TernaryNode) -> None: |
| super().visit_TernaryNode(node) |
| self.add_space_after(node.condition) |
| self.add_space_after(node.questionmark) |
| self.add_space_after(node.trueblock) |
| self.add_space_after(node.colon) |
| self.move_whitespaces(node.falseblock, node) |
| |
| def visit_ArgumentNode(self, node: mparser.ArgumentNode) -> None: |
| if not node.is_multiline: |
| ml_detector = MultilineArgumentDetector(self.config) |
| node.accept(ml_detector) |
| if ml_detector.is_multiline: |
| node.is_multiline = True |
| |
| self.in_arguments += 1 |
| super().visit_ArgumentNode(node) |
| self.in_arguments -= 1 |
| |
| if not node.arguments and not node.kwargs: |
| node.whitespaces.accept(self) |
| return |
| |
| last_node: mparser.BaseNode |
| has_trailing_comma = len(node.commas) == len(node.arguments) + len(node.kwargs) |
| if has_trailing_comma: |
| last_node = node.commas[-1] |
| elif node.kwargs: |
| for last_node in node.kwargs.values(): |
| pass |
| else: |
| last_node = node.arguments[-1] |
| |
| self.move_whitespaces(last_node, node) |
| |
| if not node.is_multiline and '#' not in node.whitespaces.value: |
| node.whitespaces.value = '' |
| |
| def visit_ParenthesizedNode(self, node: mparser.ParenthesizedNode) -> None: |
| self.enter_node(node) |
| |
| is_multiline = node.lpar.whitespaces and '#' in node.lpar.whitespaces.value |
| if is_multiline: |
| self.indent_comments += self.config.indent_by |
| |
| node.lpar.accept(self) |
| node.inner.accept(self) |
| |
| if is_multiline: |
| node.inner.whitespaces.value = self.dedent(node.inner.whitespaces.value) |
| self.indent_comments = self.dedent(self.indent_comments) |
| self.add_nl_after(node.inner) |
| |
| node.rpar.accept(self) |
| self.move_whitespaces(node.rpar, node) |
| |
| |
| class ArgumentFormatter(FullAstVisitor): |
| |
| def __init__(self, config: FormatterConfig): |
| self.config = config |
| self.level = 0 |
| self.indent_after = False |
| self.is_function_arguments = False |
| |
| def add_space_after(self, node: mparser.BaseNode) -> None: |
| if not node.whitespaces.value: |
| node.whitespaces.value = ' ' |
| |
| def add_nl_after(self, node: mparser.BaseNode, indent: int) -> None: |
| if not node.whitespaces.value or node.whitespaces.value == ' ': |
| node.whitespaces.value = '\n' |
| indent_by = (node.condition_level + indent) * self.config.indent_by |
| if indent_by: |
| node.whitespaces.value += indent_by |
| |
| def visit_ArrayNode(self, node: mparser.ArrayNode) -> None: |
| self.enter_node(node) |
| if node.args.is_multiline: |
| self.level += 1 |
| if node.args.arguments: |
| self.add_nl_after(node.lbracket, indent=self.level) |
| node.lbracket.accept(self) |
| self.is_function_arguments = False |
| node.args.accept(self) |
| if node.args.is_multiline: |
| self.level -= 1 |
| node.rbracket.accept(self) |
| self.exit_node(node) |
| |
| def visit_DictNode(self, node: mparser.DictNode) -> None: |
| self.enter_node(node) |
| if node.args.is_multiline: |
| self.level += 1 |
| if node.args.kwargs: |
| self.add_nl_after(node.lcurl, indent=self.level) |
| node.lcurl.accept(self) |
| self.is_function_arguments = False |
| node.args.accept(self) |
| if node.args.is_multiline: |
| self.level -= 1 |
| node.rcurl.accept(self) |
| self.exit_node(node) |
| |
| def visit_MethodNode(self, node: mparser.MethodNode) -> None: |
| self.enter_node(node) |
| node.source_object.accept(self) |
| is_cont = node.source_object.whitespaces and node.source_object.whitespaces.is_continuation |
| if is_cont: |
| self.level += 1 |
| if node.args.is_multiline: |
| self.level += 1 |
| self.add_nl_after(node.lpar, indent=self.level) |
| self.is_function_arguments = True |
| node.args.accept(self) |
| if node.args.is_multiline: |
| self.level -= 1 |
| if is_cont: |
| self.level -= 1 |
| self.exit_node(node) |
| |
| def visit_FunctionNode(self, node: mparser.FunctionNode) -> None: |
| self.enter_node(node) |
| if node.args.is_multiline: |
| self.level += 1 |
| self.add_nl_after(node.lpar, indent=self.level) |
| self.is_function_arguments = True |
| node.args.accept(self) |
| if node.args.is_multiline: |
| self.level -= 1 |
| self.exit_node(node) |
| |
| def visit_WhitespaceNode(self, node: mparser.WhitespaceNode) -> None: |
| lines = node.value.splitlines(keepends=True) |
| if lines: |
| indent = (node.condition_level + self.level) * self.config.indent_by |
| node.value = '' if node.block_indent else lines.pop(0) |
| for line in lines: |
| if '#' in line and not line.startswith(indent): |
| node.value += indent |
| node.value += line |
| if self.indent_after and node.value.endswith(('\n', self.config.indent_by)): |
| node.value += indent |
| |
| def visit_ArgumentNode(self, node: mparser.ArgumentNode) -> None: |
| is_function_arguments = self.is_function_arguments # record it, because it may change when visiting children |
| super().visit_ArgumentNode(node) |
| |
| for colon in node.colons: |
| self.add_space_after(colon) |
| |
| if self.config.wide_colon: |
| for key in node.kwargs: |
| self.add_space_after(key) |
| |
| arguments_count = len(node.arguments) + len(node.kwargs) |
| has_trailing_comma = node.commas and len(node.commas) == arguments_count |
| if node.is_multiline: |
| need_comma = True |
| if arguments_count == 1 and is_function_arguments: |
| need_comma = not self.config.no_single_comma_function |
| |
| if need_comma and not has_trailing_comma: |
| comma = mparser.SymbolNode(mparser.Token('comma', node.filename, 0, 0, 0, (0, 0), ',')) |
| comma.condition_level = node.condition_level |
| comma.whitespaces = mparser.WhitespaceNode(mparser.Token('whitespace', node.filename, 0, 0, 0, (0, 0), '')) |
| node.commas.append(comma) |
| elif has_trailing_comma and not need_comma: |
| node.commas.pop(-1) |
| |
| arg_index = 0 |
| if self.config.group_arg_value: |
| for arg in node.arguments[:-1]: |
| group_args = False |
| if isinstance(arg, mparser.StringNode) and arg.value.startswith('--'): |
| next_arg = node.arguments[arg_index + 1] |
| if isinstance(next_arg, mparser.StringNode) and not next_arg.value.startswith('--'): |
| group_args = True |
| if group_args: |
| # keep '--arg', 'value' on same line |
| self.add_space_after(node.commas[arg_index]) |
| elif arg_index < len(node.commas): |
| self.add_nl_after(node.commas[arg_index], self.level) |
| arg_index += 1 |
| |
| for comma in node.commas[arg_index:-1]: |
| self.add_nl_after(comma, self.level) |
| if node.arguments or node.kwargs: |
| self.add_nl_after(node, self.level - 1) |
| |
| else: |
| if has_trailing_comma and not (node.commas[-1].whitespaces and node.commas[-1].whitespaces.value): |
| node.commas.pop(-1) |
| |
| for comma in node.commas: |
| self.add_space_after(comma) |
| |
| self.exit_node(node) |
| |
| def visit_ParenthesizedNode(self, node: mparser.ParenthesizedNode) -> None: |
| self.enter_node(node) |
| is_multiline = '\n' in node.lpar.whitespaces.value |
| if is_multiline: |
| current_indent_after = self.indent_after |
| self.indent_after = True |
| node.lpar.accept(self) |
| node.inner.accept(self) |
| if is_multiline: |
| self.indent_after = current_indent_after |
| node.rpar.accept(self) |
| self.exit_node(node) |
| |
| |
| class ComputeLineLengths(FullAstVisitor): |
| |
| def __init__(self, config: FormatterConfig, level: int): |
| self.config = config |
| self.lengths: T.List[int] = [] |
| self.length = 0 |
| self.argument_stack: T.List[mparser.ArgumentNode] = [] |
| self.level = level |
| self.need_regenerate = False |
| |
| def visit_default_func(self, node: mparser.BaseNode) -> None: |
| self.enter_node(node) |
| assert hasattr(node, 'value') |
| self.length += len(str(node.value)) |
| self.exit_node(node) |
| |
| def len(self, line: str) -> int: |
| '''Compute line length, including tab stops''' |
| parts = line.split('\t') |
| line_length = len(parts[0]) |
| for p in parts[1:]: |
| tab_length = ((self.length + line_length) % self.config.tab_width) or self.config.tab_width |
| line_length += tab_length + len(p) |
| return line_length |
| |
| def count_multiline(self, value: str) -> None: |
| lines = value.splitlines(keepends=True) |
| for line in lines: |
| if line.endswith('\n'): |
| self.lengths.append(self.length + self.len(line) - 1) |
| self.length = 0 |
| else: |
| self.length += self.len(line) |
| |
| def visit_WhitespaceNode(self, node: mparser.WhitespaceNode) -> None: |
| self.count_multiline(node.value) |
| |
| def visit_EmptyNode(self, node: mparser.EmptyNode) -> None: |
| self.enter_node(node) |
| self.exit_node(node) |
| |
| def visit_NumberNode(self, node: mparser.NumberNode) -> None: |
| self.enter_node(node) |
| self.length += len(node.raw_value) |
| self.exit_node(node) |
| |
| def visit_StringNode(self, node: mparser.StringNode) -> None: |
| self.enter_node(node) |
| if node.is_fstring: |
| self.length += 1 |
| |
| if node.is_multiline: |
| self.length += 3 |
| self.count_multiline(node.value) |
| self.length += 3 |
| else: |
| self.length += self.len(node.raw_value) + 2 |
| |
| self.exit_node(node) |
| |
| def visit_ContinueNode(self, node: mparser.ContinueNode) -> None: |
| self.enter_node(node) |
| self.length += len('continue') |
| self.exit_node(node) |
| |
| def visit_BreakNode(self, node: mparser.BreakNode) -> None: |
| self.enter_node(node) |
| self.length += len('break') |
| self.exit_node(node) |
| |
| def split_if_needed(self, node: mparser.ArgumentNode) -> None: |
| if len(node) and not node.is_multiline and self.length > self.config.max_line_length: |
| arg = self.argument_stack[self.level] if len(self.argument_stack) > self.level else node |
| arg.is_multiline = True |
| self.need_regenerate = True |
| |
| def visit_ArgumentNode(self, node: mparser.ArgumentNode) -> None: |
| self.argument_stack.append(node) |
| super().visit_ArgumentNode(node) |
| self.split_if_needed(node) |
| self.argument_stack.pop(-1) |
| |
| def visit_ArrayNode(self, node: mparser.ArrayNode) -> None: |
| self.enter_node(node) |
| node.lbracket.accept(self) |
| node.args.accept(self) |
| node.rbracket.accept(self) |
| self.split_if_needed(node.args) # split if closing bracket is too far |
| self.exit_node(node) |
| |
| def visit_DictNode(self, node: mparser.DictNode) -> None: |
| self.enter_node(node) |
| node.lcurl.accept(self) |
| node.args.accept(self) |
| node.rcurl.accept(self) |
| self.split_if_needed(node.args) # split if closing bracket is too far |
| self.exit_node(node) |
| |
| |
| class SubdirFetcher(FullAstVisitor): |
| |
| def __init__(self, current_dir: Path): |
| self.current_dir = current_dir |
| self.subdirs: T.List[Path] = [] |
| |
| def visit_FunctionNode(self, node: mparser.FunctionNode) -> None: |
| if node.func_name.value == 'subdir': |
| if node.args.arguments and isinstance(node.args.arguments[0], mparser.StringNode): |
| subdir = node.args.arguments[0].value |
| self.subdirs.append(self.current_dir / subdir) |
| super().visit_FunctionNode(node) |
| |
| |
| class Formatter: |
| |
| def __init__(self, configuration_file: T.Optional[Path], use_editor_config: bool, fetch_subdirs: bool): |
| self.fetch_subdirs = fetch_subdirs |
| self.use_editor_config = use_editor_config |
| self.config = self.load_configuration(configuration_file) |
| self.current_config = self.config |
| |
| self.current_dir = Path() |
| self.subdirs: T.List[Path] = [] |
| |
| def load_editor_config(self, source_file: Path) -> EditorConfig: |
| # See https://editorconfig.org/ |
| config = EditorConfig() |
| |
| for p in source_file.parents: |
| editorconfig_file = p / '.editorconfig' |
| if not editorconfig_file.exists(): |
| continue |
| |
| cp = DefaultConfigParser(delimiters=('=',)) |
| cp.read_default(editorconfig_file) |
| |
| sections = [section for section in cp.sections() if match_path(source_file.as_posix(), section)] |
| for f in fields(config): |
| if getattr(cp, f.name, None) is not None: |
| continue # value already set from higher file |
| |
| getter = f.metadata['getter'] |
| for section in sections: |
| try: |
| value = getter(cp, section, f.name, fallback=None) |
| except ValueError as e: |
| raise MesonException(f'Invalid type for key "{f.name}" in "{editorconfig_file}" file:\n{e}') from e |
| if value is not None: |
| setattr(config, f.name, value) |
| |
| # Root is not required except in the top level .editorconfig. |
| if cp.getboolean(cp.default_section, 'root', fallback=False): |
| break |
| |
| return config |
| |
| def load_configuration(self, configuration_file: T.Optional[Path]) -> FormatterConfig: |
| config = FormatterConfig() |
| if configuration_file: |
| cp = DefaultConfigParser() |
| try: |
| cp.read_default(configuration_file) |
| except ParsingError as e: |
| raise MesonException(f'Unable to parse configuration file "{configuration_file}":\n{e}') from e |
| |
| extra_keys = sorted(set(cp.defaults()).difference(f.name for f in fields(config))) |
| if extra_keys: |
| raise MesonException(f'Unknown config keys: "{", ".join(extra_keys)}" in configuration file "{configuration_file}"') |
| |
| for f in fields(config): |
| getter = f.metadata['getter'] |
| try: |
| value = getter(cp, cp.default_section, f.name, fallback=None) |
| except ValueError as e: |
| raise MesonException( |
| f'Error parsing "{str(configuration_file)}", option "{f.name}", error: "{e!s}"') |
| if value is not None: |
| setattr(config, f.name, value) |
| |
| if config.use_editor_config: |
| self.use_editor_config = True |
| |
| return config |
| |
| def format(self, code: str, source_file: Path) -> str: |
| self.current_dir = source_file.parent |
| self.current_config = FormatterConfig.default() |
| if self.use_editor_config: |
| self.current_config = self.current_config.with_editorconfig(self.load_editor_config(source_file)) |
| self.current_config = self.current_config.update(self.config) |
| |
| ast = mparser.Parser(code, source_file.as_posix()).parse() |
| if self.fetch_subdirs: |
| subdir_fetcher = SubdirFetcher(self.current_dir) |
| ast.accept(subdir_fetcher) |
| self.subdirs = subdir_fetcher.subdirs |
| |
| ast.accept(AstConditionLevel()) |
| for level in range(5): |
| ast.accept(TrimWhitespaces(self.current_config)) |
| ast.accept(ArgumentFormatter(self.current_config)) |
| |
| cll = ComputeLineLengths(self.current_config, level) |
| ast.accept(cll) |
| if not cll.need_regenerate: |
| break |
| |
| printer = RawPrinter() |
| ast.accept(printer) |
| return printer.result |
| |
| |
| def add_arguments(parser: argparse.ArgumentParser) -> None: |
| inplace_group = parser.add_mutually_exclusive_group() |
| inplace_group.add_argument( |
| '-q', '--check-only', |
| action='store_true', |
| help='exit with 1 if files would be modified by meson format' |
| ) |
| inplace_group.add_argument( |
| '-i', '--inplace', |
| action='store_true', |
| help='format files in-place' |
| ) |
| parser.add_argument( |
| '-r', '--recursive', |
| action='store_true', |
| help='recurse subdirs (requires --check-only or --inplace option)', |
| ) |
| parser.add_argument( |
| '-c', '--configuration', |
| metavar='meson.format', |
| type=Path, |
| help='read configuration from meson.format' |
| ) |
| parser.add_argument( |
| '-e', '--editor-config', |
| action='store_true', |
| default=False, |
| help='try to read configuration from .editorconfig' |
| ) |
| parser.add_argument( |
| '-o', '--output', |
| type=Path, |
| help='output file (implies having exactly one input)' |
| ) |
| parser.add_argument( |
| 'sources', |
| nargs='*', |
| type=Path, |
| help='meson source files' |
| ) |
| |
| def run(options: argparse.Namespace) -> int: |
| if options.output and len(options.sources) != 1: |
| raise MesonException('--output argument implies having exactly one source file') |
| if options.recursive and not (options.inplace or options.check_only): |
| raise MesonException('--recursive argument requires either --inplace or --check-only option') |
| |
| from_stdin = len(options.sources) == 1 and options.sources[0].name == '-' and options.sources[0].parent == Path() |
| if options.recursive and from_stdin: |
| raise MesonException('--recursive argument is not compatible with stdin input') |
| if options.inplace and from_stdin: |
| raise MesonException('--inplace argument is not compatible with stdin input') |
| |
| sources: T.List[Path] = options.sources.copy() or [Path(build_filename)] |
| if not options.configuration: |
| default_config_path = sources[0].parent / 'meson.format' |
| if default_config_path.exists(): |
| options.configuration = default_config_path |
| formatter = Formatter(options.configuration, options.editor_config, options.recursive) |
| |
| while sources: |
| src_file = sources.pop(0) |
| if src_file.is_dir(): |
| src_file = src_file / build_filename |
| |
| try: |
| if from_stdin: |
| src_file = Path('STDIN') # used for error messages and introspection |
| code = sys.stdin.read() |
| else: |
| code = src_file.read_text(encoding='utf-8') |
| except IOError as e: |
| raise MesonException(f'Unable to read from {src_file}') from e |
| |
| formatted = formatter.format(code, src_file) |
| if options.recursive: |
| sources.extend(formatter.subdirs) |
| |
| if options.inplace: |
| try: |
| with src_file.open('w', encoding='utf-8', newline=formatter.current_config.newline) as sf: |
| sf.write(formatted) |
| except IOError as e: |
| raise MesonException(f'Unable to write to {src_file}') from e |
| elif options.check_only: |
| # TODO: add verbose output showing diffs |
| if code != formatted: |
| return 1 |
| elif options.output: |
| try: |
| with options.output.open('w', encoding='utf-8', newline=formatter.current_config.newline) as of: |
| of.write(formatted) |
| except IOError as e: |
| raise MesonException(f'Unable to write to {options.output}') from e |
| else: |
| print(formatted, end='') |
| |
| return 0 |
| |
| # TODO: remove empty newlines when more than N (2...) |
| # TODO: magic comment to prevent formatting |
| # TODO: split long lines on binary operators |
| # TODO: align series of assignments |
| # TODO: align comments |
| # TODO: move comments on long lines |
| |
| # Differences from muon format: |
| # - By default, uses two spaces before comment, and added option for that |
| # - Muon will mix CRLF and LF on Windows files... |
| # - Support for end_of_line char |
| # - Support for max_line_length, end_of_line, insert_final_newline, tab_width in .editorconfig |
| # - Option to simplify string literals |
| # - Option to recognize and parse meson.build in subdirs |
| # - Correctly compute line length when using tabs |
| # - By default, arguments in files() are sorted alphabetically |
| # - Option to group '--arg', 'value' on same line in multiline arguments |
