X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/b4a6bb08fa704facbf3397f95b3216e13c3c964a..69ca0a4c7a365c5f5eea519a90980bab72cab764:/src/black/files.py diff --git a/src/black/files.py b/src/black/files.py index 8348e0d..8c01311 100644 --- a/src/black/files.py +++ b/src/black/files.py @@ -1,9 +1,10 @@ -from functools import lru_cache import io import os -from pathlib import Path import sys +from functools import lru_cache +from pathlib import Path from typing import ( + TYPE_CHECKING, Any, Dict, Iterable, @@ -14,24 +15,37 @@ from typing import ( Sequence, Tuple, Union, - TYPE_CHECKING, ) from mypy_extensions import mypyc_attr +from packaging.specifiers import InvalidSpecifier, Specifier, SpecifierSet +from packaging.version import InvalidVersion, Version from pathspec import PathSpec from pathspec.patterns.gitwildmatch import GitWildMatchPatternError -import tomli +if sys.version_info >= (3, 11): + try: + import tomllib + except ImportError: + # Help users on older alphas + if not TYPE_CHECKING: + import tomli as tomllib +else: + import tomli as tomllib + +from black.handle_ipynb_magics import jupyter_dependencies_are_installed +from black.mode import TargetVersion from black.output import err from black.report import Report -from black.handle_ipynb_magics import jupyter_dependencies_are_installed if TYPE_CHECKING: import colorama # noqa: F401 @lru_cache() -def find_project_root(srcs: Sequence[str]) -> Tuple[Path, str]: +def find_project_root( + srcs: Sequence[str], stdin_filename: Optional[str] = None +) -> Tuple[Path, str]: """Return a directory containing .git, .hg, or pyproject.toml. That directory will be a common parent of all files and directories @@ -44,6 +58,8 @@ def find_project_root(srcs: Sequence[str]) -> Tuple[Path, str]: the second element as a string describing the method by which the project root was discovered. """ + if stdin_filename is not None: + srcs = tuple(stdin_filename if s == "-" else s for s in srcs) if not srcs: srcs = [str(Path.cwd().resolve())] @@ -95,14 +111,103 @@ def find_pyproject_toml(path_search_start: Tuple[str, ...]) -> Optional[str]: @mypyc_attr(patchable=True) def parse_pyproject_toml(path_config: str) -> Dict[str, Any]: - """Parse a pyproject toml file, pulling out relevant parts for Black + """Parse a pyproject toml file, pulling out relevant parts for Black. - If parsing fails, will raise a tomli.TOMLDecodeError + If parsing fails, will raise a tomllib.TOMLDecodeError. """ with open(path_config, "rb") as f: - pyproject_toml = tomli.load(f) - config = pyproject_toml.get("tool", {}).get("black", {}) - return {k.replace("--", "").replace("-", "_"): v for k, v in config.items()} + pyproject_toml = tomllib.load(f) + config: Dict[str, Any] = pyproject_toml.get("tool", {}).get("black", {}) + config = {k.replace("--", "").replace("-", "_"): v for k, v in config.items()} + + if "target_version" not in config: + inferred_target_version = infer_target_version(pyproject_toml) + if inferred_target_version is not None: + config["target_version"] = [v.name.lower() for v in inferred_target_version] + + return config + + +def infer_target_version( + pyproject_toml: Dict[str, Any] +) -> Optional[List[TargetVersion]]: + """Infer Black's target version from the project metadata in pyproject.toml. + + Supports the PyPA standard format (PEP 621): + https://packaging.python.org/en/latest/specifications/declaring-project-metadata/#requires-python + + If the target version cannot be inferred, returns None. + """ + project_metadata = pyproject_toml.get("project", {}) + requires_python = project_metadata.get("requires-python", None) + if requires_python is not None: + try: + return parse_req_python_version(requires_python) + except InvalidVersion: + pass + try: + return parse_req_python_specifier(requires_python) + except (InvalidSpecifier, InvalidVersion): + pass + + return None + + +def parse_req_python_version(requires_python: str) -> Optional[List[TargetVersion]]: + """Parse a version string (i.e. ``"3.7"``) to a list of TargetVersion. + + If parsing fails, will raise a packaging.version.InvalidVersion error. + If the parsed version cannot be mapped to a valid TargetVersion, returns None. + """ + version = Version(requires_python) + if version.release[0] != 3: + return None + try: + return [TargetVersion(version.release[1])] + except (IndexError, ValueError): + return None + + +def parse_req_python_specifier(requires_python: str) -> Optional[List[TargetVersion]]: + """Parse a specifier string (i.e. ``">=3.7,<3.10"``) to a list of TargetVersion. + + If parsing fails, will raise a packaging.specifiers.InvalidSpecifier error. + If the parsed specifier cannot be mapped to a valid TargetVersion, returns None. + """ + specifier_set = strip_specifier_set(SpecifierSet(requires_python)) + if not specifier_set: + return None + + target_version_map = {f"3.{v.value}": v for v in TargetVersion} + compatible_versions: List[str] = list(specifier_set.filter(target_version_map)) + if compatible_versions: + return [target_version_map[v] for v in compatible_versions] + return None + + +def strip_specifier_set(specifier_set: SpecifierSet) -> SpecifierSet: + """Strip minor versions for some specifiers in the specifier set. + + For background on version specifiers, see PEP 440: + https://peps.python.org/pep-0440/#version-specifiers + """ + specifiers = [] + for s in specifier_set: + if "*" in str(s): + specifiers.append(s) + elif s.operator in ["~=", "==", ">=", "==="]: + version = Version(s.version) + stripped = Specifier(f"{s.operator}{version.major}.{version.minor}") + specifiers.append(stripped) + elif s.operator == ">": + version = Version(s.version) + if len(version.release) > 2: + s = Specifier(f">={version.major}.{version.minor}") + specifiers.append(s) + else: + specifiers.append(s) + + return SpecifierSet(",".join(str(s) for s in specifiers)) @lru_cache() @@ -151,23 +256,35 @@ def normalize_path_maybe_ignore( """ try: abspath = path if path.is_absolute() else Path.cwd() / path - normalized_path = abspath.resolve().relative_to(root).as_posix() - except OSError as e: - if report: - report.path_ignored(path, f"cannot be read because {e}") - return None - - except ValueError: - if path.is_symlink(): + normalized_path = abspath.resolve() + try: + root_relative_path = normalized_path.relative_to(root).as_posix() + except ValueError: if report: report.path_ignored( path, f"is a symbolic link that points outside {root}" ) return None - raise + except OSError as e: + if report: + report.path_ignored(path, f"cannot be read because {e}") + return None + + return root_relative_path - return normalized_path + +def path_is_ignored( + path: Path, gitignore_dict: Dict[Path, PathSpec], report: Report +) -> bool: + for gitignore_path, pattern in gitignore_dict.items(): + relative_path = normalize_path_maybe_ignore(path, gitignore_path, report) + if relative_path is None: + break + if pattern.match_file(relative_path): + report.path_ignored(path, "matches a .gitignore file content") + return True + return False def path_is_excluded( @@ -186,7 +303,7 @@ def gen_python_files( extend_exclude: Optional[Pattern[str]], force_exclude: Optional[Pattern[str]], report: Report, - gitignore: Optional[PathSpec], + gitignore_dict: Optional[Dict[Path, PathSpec]], *, verbose: bool, quiet: bool, @@ -199,6 +316,7 @@ def gen_python_files( `report` is where output about exclusions goes. """ + assert root.is_absolute(), f"INTERNAL ERROR: `root` must be absolute but is {root}" for child in paths: normalized_path = normalize_path_maybe_ignore(child, root, report) @@ -206,8 +324,7 @@ def gen_python_files( continue # First ignore files matching .gitignore, if passed - if gitignore is not None and gitignore.match_file(normalized_path): - report.path_ignored(child, "matches the .gitignore file content") + if gitignore_dict and path_is_ignored(child, gitignore_dict, report): continue # Then ignore with `--exclude` `--extend-exclude` and `--force-exclude` options. @@ -232,6 +349,13 @@ def gen_python_files( if child.is_dir(): # If gitignore is None, gitignore usage is disabled, while a Falsey # gitignore is when the directory doesn't have a .gitignore file. + if gitignore_dict is not None: + new_gitignore_dict = { + **gitignore_dict, + root / child: get_gitignore(child), + } + else: + new_gitignore_dict = None yield from gen_python_files( child.iterdir(), root, @@ -240,7 +364,7 @@ def gen_python_files( extend_exclude, force_exclude, report, - gitignore + get_gitignore(child) if gitignore is not None else None, + new_gitignore_dict, verbose=verbose, quiet=quiet, )