djavu-asus/emacs/elpy/rpc-venv/lib/python3.11/site-packages/black/files.py

   1 import io
   2 import os
   3 import sys
   4 from functools import lru_cache
   5 from pathlib import Path
   6 from typing import (
   7     TYPE_CHECKING,
   8     Any,
   9     Dict,
  10     Iterable,
  11     Iterator,
  12     List,
  13     Optional,
  14     Pattern,
  15     Sequence,
  16     Tuple,
  17     Union,
  18 )
  19
  20 from mypy_extensions import mypyc_attr
  21 from packaging.specifiers import InvalidSpecifier, Specifier, SpecifierSet
  22 from packaging.version import InvalidVersion, Version
  23 from pathspec import PathSpec
  24 from pathspec.patterns.gitwildmatch import GitWildMatchPatternError
  25
  26 if sys.version_info >= (3, 11):
  27     try:
  28         import tomllib
  29     except ImportError:
  30         # Help users on older alphas
  31         if not TYPE_CHECKING:
  32             import tomli as tomllib
  33 else:
  34     import tomli as tomllib
  35
  36 from black.handle_ipynb_magics import jupyter_dependencies_are_installed
  37 from black.mode import TargetVersion
  38 from black.output import err
  39 from black.report import Report
  40
  41 if TYPE_CHECKING:
  42     import colorama  # noqa: F401
  43
  44
  45 @lru_cache
  46 def find_project_root(
  47     srcs: Sequence[str], stdin_filename: Optional[str] = None
  48 ) -> Tuple[Path, str]:
  49     """Return a directory containing .git, .hg, or pyproject.toml.
  50
  51     That directory will be a common parent of all files and directories
  52     passed in `srcs`.
  53
  54     If no directory in the tree contains a marker that would specify it's the
  55     project root, the root of the file system is returned.
  56
  57     Returns a two-tuple with the first element as the project root path and
  58     the second element as a string describing the method by which the
  59     project root was discovered.
  60     """
  61     if stdin_filename is not None:
  62         srcs = tuple(stdin_filename if s == "-" else s for s in srcs)
  63     if not srcs:
  64         srcs = [str(Path.cwd().resolve())]
  65
  66     path_srcs = [Path(Path.cwd(), src).resolve() for src in srcs]
  67
  68     # A list of lists of parents for each 'src'. 'src' is included as a
  69     # "parent" of itself if it is a directory
  70     src_parents = [
  71         list(path.parents) + ([path] if path.is_dir() else []) for path in path_srcs
  72     ]
  73
  74     common_base = max(
  75         set.intersection(*(set(parents) for parents in src_parents)),
  76         key=lambda path: path.parts,
  77     )
  78
  79     for directory in (common_base, *common_base.parents):
  80         if (directory / ".git").exists():
  81             return directory, ".git directory"
  82
  83         if (directory / ".hg").is_dir():
  84             return directory, ".hg directory"
  85
  86         if (directory / "pyproject.toml").is_file():
  87             return directory, "pyproject.toml"
  88
  89     return directory, "file system root"
  90
  91
  92 def find_pyproject_toml(
  93     path_search_start: Tuple[str, ...], stdin_filename: Optional[str] = None
  94 ) -> Optional[str]:
  95     """Find the absolute filepath to a pyproject.toml if it exists"""
  96     path_project_root, _ = find_project_root(path_search_start, stdin_filename)
  97     path_pyproject_toml = path_project_root / "pyproject.toml"
  98     if path_pyproject_toml.is_file():
  99         return str(path_pyproject_toml)
 100
 101     try:
 102         path_user_pyproject_toml = find_user_pyproject_toml()
 103         return (
 104             str(path_user_pyproject_toml)
 105             if path_user_pyproject_toml.is_file()
 106             else None
 107         )
 108     except (PermissionError, RuntimeError) as e:
 109         # We do not have access to the user-level config directory, so ignore it.
 110         err(f"Ignoring user configuration directory due to {e!r}")
 111         return None
 112
 113
 114 @mypyc_attr(patchable=True)
 115 def parse_pyproject_toml(path_config: str) -> Dict[str, Any]:
 116     """Parse a pyproject toml file, pulling out relevant parts for Black.
 117
 118     If parsing fails, will raise a tomllib.TOMLDecodeError.
 119     """
 120     with open(path_config, "rb") as f:
 121         pyproject_toml = tomllib.load(f)
 122     config: Dict[str, Any] = pyproject_toml.get("tool", {}).get("black", {})
 123     config = {k.replace("--", "").replace("-", "_"): v for k, v in config.items()}
 124
 125     if "target_version" not in config:
 126         inferred_target_version = infer_target_version(pyproject_toml)
 127         if inferred_target_version is not None:
 128             config["target_version"] = [v.name.lower() for v in inferred_target_version]
 129
 130     return config
 131
 132
 133 def infer_target_version(
 134     pyproject_toml: Dict[str, Any]
 135 ) -> Optional[List[TargetVersion]]:
 136     """Infer Black's target version from the project metadata in pyproject.toml.
 137
 138     Supports the PyPA standard format (PEP 621):
 139     https://packaging.python.org/en/latest/specifications/declaring-project-metadata/#requires-python
 140
 141     If the target version cannot be inferred, returns None.
 142     """
 143     project_metadata = pyproject_toml.get("project", {})
 144     requires_python = project_metadata.get("requires-python", None)
 145     if requires_python is not None:
 146         try:
 147             return parse_req_python_version(requires_python)
 148         except InvalidVersion:
 149             pass
 150         try:
 151             return parse_req_python_specifier(requires_python)
 152         except (InvalidSpecifier, InvalidVersion):
 153             pass
 154
 155     return None
 156
 157
 158 def parse_req_python_version(requires_python: str) -> Optional[List[TargetVersion]]:
 159     """Parse a version string (i.e. ``"3.7"``) to a list of TargetVersion.
 160
 161     If parsing fails, will raise a packaging.version.InvalidVersion error.
 162     If the parsed version cannot be mapped to a valid TargetVersion, returns None.
 163     """
 164     version = Version(requires_python)
 165     if version.release[0] != 3:
 166         return None
 167     try:
 168         return [TargetVersion(version.release[1])]
 169     except (IndexError, ValueError):
 170         return None
 171
 172
 173 def parse_req_python_specifier(requires_python: str) -> Optional[List[TargetVersion]]:
 174     """Parse a specifier string (i.e. ``">=3.7,<3.10"``) to a list of TargetVersion.
 175
 176     If parsing fails, will raise a packaging.specifiers.InvalidSpecifier error.
 177     If the parsed specifier cannot be mapped to a valid TargetVersion, returns None.
 178     """
 179     specifier_set = strip_specifier_set(SpecifierSet(requires_python))
 180     if not specifier_set:
 181         return None
 182
 183     target_version_map = {f"3.{v.value}": v for v in TargetVersion}
 184     compatible_versions: List[str] = list(specifier_set.filter(target_version_map))
 185     if compatible_versions:
 186         return [target_version_map[v] for v in compatible_versions]
 187     return None
 188
 189
 190 def strip_specifier_set(specifier_set: SpecifierSet) -> SpecifierSet:
 191     """Strip minor versions for some specifiers in the specifier set.
 192
 193     For background on version specifiers, see PEP 440:
 194     https://peps.python.org/pep-0440/#version-specifiers
 195     """
 196     specifiers = []
 197     for s in specifier_set:
 198         if "*" in str(s):
 199             specifiers.append(s)
 200         elif s.operator in ["~=", "==", ">=", "==="]:
 201             version = Version(s.version)
 202             stripped = Specifier(f"{s.operator}{version.major}.{version.minor}")
 203             specifiers.append(stripped)
 204         elif s.operator == ">":
 205             version = Version(s.version)
 206             if len(version.release) > 2:
 207                 s = Specifier(f">={version.major}.{version.minor}")
 208             specifiers.append(s)
 209         else:
 210             specifiers.append(s)
 211
 212     return SpecifierSet(",".join(str(s) for s in specifiers))
 213
 214
 215 @lru_cache
 216 def find_user_pyproject_toml() -> Path:
 217     r"""Return the path to the top-level user configuration for black.
 218
 219     This looks for ~\.black on Windows and ~/.config/black on Linux and other
 220     Unix systems.
 221
 222     May raise:
 223     - RuntimeError: if the current user has no homedir
 224     - PermissionError: if the current process cannot access the user's homedir
 225     """
 226     if sys.platform == "win32":
 227         # Windows
 228         user_config_path = Path.home() / ".black"
 229     else:
 230         config_root = os.environ.get("XDG_CONFIG_HOME", "~/.config")
 231         user_config_path = Path(config_root).expanduser() / "black"
 232     return user_config_path.resolve()
 233
 234
 235 @lru_cache
 236 def get_gitignore(root: Path) -> PathSpec:
 237     """Return a PathSpec matching gitignore content if present."""
 238     gitignore = root / ".gitignore"
 239     lines: List[str] = []
 240     if gitignore.is_file():
 241         with gitignore.open(encoding="utf-8") as gf:
 242             lines = gf.readlines()
 243     try:
 244         return PathSpec.from_lines("gitwildmatch", lines)
 245     except GitWildMatchPatternError as e:
 246         err(f"Could not parse {gitignore}: {e}")
 247         raise
 248
 249
 250 def normalize_path_maybe_ignore(
 251     path: Path,
 252     root: Path,
 253     report: Optional[Report] = None,
 254 ) -> Optional[str]:
 255     """Normalize `path`. May return `None` if `path` was ignored.
 256
 257     `report` is where "path ignored" output goes.
 258     """
 259     try:
 260         abspath = path if path.is_absolute() else Path.cwd() / path
 261         normalized_path = abspath.resolve()
 262         try:
 263             root_relative_path = normalized_path.relative_to(root).as_posix()
 264         except ValueError:
 265             if report:
 266                 report.path_ignored(
 267                     path, f"is a symbolic link that points outside {root}"
 268                 )
 269             return None
 270
 271     except OSError as e:
 272         if report:
 273             report.path_ignored(path, f"cannot be read because {e}")
 274         return None
 275
 276     return root_relative_path
 277
 278
 279 def _path_is_ignored(
 280     root_relative_path: str,
 281     root: Path,
 282     gitignore_dict: Dict[Path, PathSpec],
 283     report: Report,
 284 ) -> bool:
 285     path = root / root_relative_path
 286     # Note that this logic is sensitive to the ordering of gitignore_dict. Callers must
 287     # ensure that gitignore_dict is ordered from least specific to most specific.
 288     for gitignore_path, pattern in gitignore_dict.items():
 289         try:
 290             relative_path = path.relative_to(gitignore_path).as_posix()
 291         except ValueError:
 292             break
 293         if pattern.match_file(relative_path):
 294             report.path_ignored(
 295                 path.relative_to(root), "matches a .gitignore file content"
 296             )
 297             return True
 298     return False
 299
 300
 301 def path_is_excluded(
 302     normalized_path: str,
 303     pattern: Optional[Pattern[str]],
 304 ) -> bool:
 305     match = pattern.search(normalized_path) if pattern else None
 306     return bool(match and match.group(0))
 307
 308
 309 def gen_python_files(
 310     paths: Iterable[Path],
 311     root: Path,
 312     include: Pattern[str],
 313     exclude: Pattern[str],
 314     extend_exclude: Optional[Pattern[str]],
 315     force_exclude: Optional[Pattern[str]],
 316     report: Report,
 317     gitignore_dict: Optional[Dict[Path, PathSpec]],
 318     *,
 319     verbose: bool,
 320     quiet: bool,
 321 ) -> Iterator[Path]:
 322     """Generate all files under `path` whose paths are not excluded by the
 323     `exclude_regex`, `extend_exclude`, or `force_exclude` regexes,
 324     but are included by the `include` regex.
 325
 326     Symbolic links pointing outside of the `root` directory are ignored.
 327
 328     `report` is where output about exclusions goes.
 329     """
 330
 331     assert root.is_absolute(), f"INTERNAL ERROR: `root` must be absolute but is {root}"
 332     for child in paths:
 333         root_relative_path = child.absolute().relative_to(root).as_posix()
 334
 335         # First ignore files matching .gitignore, if passed
 336         if gitignore_dict and _path_is_ignored(
 337             root_relative_path, root, gitignore_dict, report
 338         ):
 339             continue
 340
 341         # Then ignore with `--exclude` `--extend-exclude` and `--force-exclude` options.
 342         root_relative_path = "/" + root_relative_path
 343         if child.is_dir():
 344             root_relative_path += "/"
 345
 346         if path_is_excluded(root_relative_path, exclude):
 347             report.path_ignored(child, "matches the --exclude regular expression")
 348             continue
 349
 350         if path_is_excluded(root_relative_path, extend_exclude):
 351             report.path_ignored(
 352                 child, "matches the --extend-exclude regular expression"
 353             )
 354             continue
 355
 356         if path_is_excluded(root_relative_path, force_exclude):
 357             report.path_ignored(child, "matches the --force-exclude regular expression")
 358             continue
 359
 360         normalized_path = normalize_path_maybe_ignore(child, root, report)
 361         if normalized_path is None:
 362             continue
 363
 364         if child.is_dir():
 365             # If gitignore is None, gitignore usage is disabled, while a Falsey
 366             # gitignore is when the directory doesn't have a .gitignore file.
 367             if gitignore_dict is not None:
 368                 new_gitignore_dict = {
 369                     **gitignore_dict,
 370                     root / child: get_gitignore(child),
 371                 }
 372             else:
 373                 new_gitignore_dict = None
 374             yield from gen_python_files(
 375                 child.iterdir(),
 376                 root,
 377                 include,
 378                 exclude,
 379                 extend_exclude,
 380                 force_exclude,
 381                 report,
 382                 new_gitignore_dict,
 383                 verbose=verbose,
 384                 quiet=quiet,
 385             )
 386
 387         elif child.is_file():
 388             if child.suffix == ".ipynb" and not jupyter_dependencies_are_installed(
 389                 warn=verbose or not quiet
 390             ):
 391                 continue
 392             include_match = include.search(normalized_path) if include else True
 393             if include_match:
 394                 yield child
 395
 396
 397 def wrap_stream_for_windows(
 398     f: io.TextIOWrapper,
 399 ) -> Union[io.TextIOWrapper, "colorama.AnsiToWin32"]:
 400     """
 401     Wrap stream with colorama's wrap_stream so colors are shown on Windows.
 402
 403     If `colorama` is unavailable, the original stream is returned unmodified.
 404     Otherwise, the `wrap_stream()` function determines whether the stream needs
 405     to be wrapped for a Windows environment and will accordingly either return
 406     an `AnsiToWin32` wrapper or the original stream.
 407     """
 408     try:
 409         from colorama.initialise import wrap_stream
 410     except ImportError:
 411         return f
 412     else:
 413         # Set `strip=False` to avoid needing to modify test_express_diff_with_color.
 414         return wrap_stream(f, convert=None, strip=False, autoreset=False, wrap=True)