# SPDX-License-Identifier: MIT from __future__ import annotations __lazy_modules__ = { 'argparse', 'build._compat', 'build._compat.tarfile', 'build._exceptions', 'build._util', 'build.env', 'functools', 'hashlib', 'json', 'packaging', 'packaging.utils', 'packaging.version', 'platform', 'pyproject_hooks', 'shutil', 'subprocess', 'tarfile', 'tempfile', 'textwrap', 'traceback', 'warnings', 'zipfile', } import argparse import contextlib import contextvars import hashlib import json import os import platform import shutil import subprocess import sys import tempfile import textwrap import traceback import warnings import zipfile from functools import partial from tarfile import TarError from tarfile import open as tar_open from typing import NoReturn, TextIO, TypedDict import pyproject_hooks from packaging.utils import InvalidSdistFilename, parse_sdist_filename from packaging.version import InvalidVersion import build import build.env as _env from build import ProjectBuilder, _ctx from build._compat.tarfile import safe_extractall from build._exceptions import BuildBackendException, BuildException, FailedProcessError from build._util import format_unmet_dependencies from build.env import DefaultIsolatedEnv TYPE_CHECKING = False if TYPE_CHECKING: from collections.abc import Generator, Mapping, Sequence from build._types import ConfigSettings, Distribution, JSONValue, StrPath, SubprocessRunner class _CliArgs: """The arguments :func:`main_parser` produces, typed for the rest of the module.""" srcdir: str verbosity: int outdir: str | None distributions: list[Distribution] | None metadata: bool config_settings: list[str] | None config_json: str | None installer: _env.Installer no_isolation: bool dependency_constraints_txt: str | None skip_dependency_check: bool sdist_extract_dir: str | None env_dir: str | None report: str | None _COLORS = { 'red': '\33[91m', 'green': '\33[92m', 'yellow': '\33[93m', 'bold': '\33[1m', 'dim': '\33[2m', 'underline': '\33[4m', 'reset': '\33[0m', } _NO_COLORS = dict.fromkeys(_COLORS, '') _DEFAULT_STYLES = {'stdout': _COLORS, 'stderr': _COLORS} _styles = contextvars.ContextVar('_styles', default=_DEFAULT_STYLES) def _init_colors() -> None: match os.environ: case {'NO_COLOR': _, 'FORCE_COLOR': _}: warnings.warn('Both NO_COLOR and FORCE_COLOR environment variables are set, disabling color', stacklevel=2) _styles.set({'stdout': _NO_COLORS, 'stderr': _NO_COLORS}) case {'NO_COLOR': _}: _styles.set({'stdout': _NO_COLORS, 'stderr': _NO_COLORS}) case {'FORCE_COLOR': _}: _styles.set({'stdout': _COLORS, 'stderr': _COLORS}) case _: _styles.set( { 'stdout': _COLORS if sys.stdout.isatty() else _NO_COLORS, 'stderr': _COLORS if sys.stderr.isatty() else _NO_COLORS, } ) def _cprint(fmt: str = '', msg: str = '', file: TextIO | None = None) -> None: stream = file or sys.stdout key = 'stderr' if stream is sys.stderr else 'stdout' print(fmt.format(msg, **_styles.get()[key]), file=file, flush=True) def _showwarning( message: Warning | str, category: type[Warning], # noqa: ARG001 filename: str, # noqa: ARG001 lineno: int, # noqa: ARG001 file: TextIO | None = None, line: str | None = None, # noqa: ARG001 ) -> None: _cprint('{yellow}WARNING{reset} {}', str(message), file if file is not None else sys.stderr) def _make_logger() -> _ctx.Logger: max_terminal_width = shutil.get_terminal_size().columns - 2 if max_terminal_width <= 0: # pragma: no cover max_terminal_width = 78 fill = partial(textwrap.fill, subsequent_indent=' ', width=max_terminal_width) def emit(message: str, *, indent: str, style: str = '{}') -> None: for line in message.splitlines(): _cprint(style, fill(line, initial_indent=indent), file=sys.stderr) # Nested so it cannot be called directly, bypassing the logger setup above. def log(message: str, *, kind: tuple[str, ...] | None = None) -> None: if _ctx.verbosity < -1: return match kind: case ('step', *_): first, _, rest = message.partition('\n') _cprint('{bold}{}{reset}', fill(first, initial_indent='* '), file=sys.stderr) emit(rest, indent=' ') case ('subprocess', 'cmd'): emit(message, indent='> ', style='{dim}{}{reset}') case ('subprocess', 'stdout' | 'stderr'): emit(message, indent='< ', style='{dim}{}{reset}') case _: emit(message, indent=' ') return log def _setup_cli(*, verbosity: int) -> None: warnings.showwarning = _showwarning if platform.system() == 'Windows': try: import colorama colorama.init() except ModuleNotFoundError: pass _init_colors() _ctx.LOGGER.set(_make_logger()) _ctx.VERBOSITY.set(verbosity) def _error(msg: str, code: int = 1) -> NoReturn: # pragma: no cover """ Print an error message and exit. Will color the output when writing to a TTY. :param msg: Error message :param code: Error code """ _cprint('{red}ERROR{reset} {}', msg, file=sys.stderr) raise SystemExit(code) @contextlib.contextmanager def _bootstrap_build_env( isolation: bool, srcdir: StrPath, distribution: Distribution, config_settings: ConfigSettings | None, skip_dependency_check: bool, dependency_constraints_txt: os.PathLike[str] | None, installer: _env.Installer, env_dir: str | None = None, runner: SubprocessRunner | None = None, ) -> Generator[ProjectBuilder]: runner = runner or pyproject_hooks.default_subprocess_runner if isolation: with DefaultIsolatedEnv(installer=installer, path=env_dir) as env: builder = ProjectBuilder.from_isolated_env(env, srcdir, runner=runner) install = env.install if dependency_constraints_txt: with open(dependency_constraints_txt, encoding='utf-8') as dependency_constraints_file: constraints_text = dependency_constraints_file.read() if constraints_text.strip(): # Passed through as a single element instead of re-parsed into lines, so a requirement can never # be split from its `--hash` continuation lines (as produced by `pip-compile --generate-hashes`) # and silently lose its hash check. env.py's installer backends reconstruct the original file via # `'\n'.join(constraints)` (see `_PipInstaller`/`_UvInstaller.install_dependencies`), a no-op here # since there is only one element. install = partial(install, constraints=(constraints_text,)) # first install the build dependencies install(builder.build_system_requires, _fresh=True) # then get the extra required dependencies from the backend (which was installed in the call above :P) extra_requires = builder.get_requires_for_build(distribution, config_settings) install(extra_requires) _log_dependency_versions(env, builder.build_system_requires | extra_requires) yield builder else: builder = ProjectBuilder(srcdir, runner=runner) if not skip_dependency_check and (missing := builder.check_dependencies(distribution, config_settings)): _cprint() _error(format_unmet_dependencies(missing)) yield builder def _log_dependency_versions(env: DefaultIsolatedEnv, requirements: set[str]) -> None: if versions := env.installed_versions(requirements): _ctx.log( 'Installed build dependency versions:\n' + '\n'.join(f'- {name}=={version}' for name, version in sorted(versions.items())), kind=('step',), ) def _build( isolation: bool, srcdir: StrPath, outdir: StrPath, distribution: Distribution, config_settings: ConfigSettings | None, skip_dependency_check: bool, dependency_constraints_txt: os.PathLike[str] | None, installer: _env.Installer, env_dir: str | None = None, ) -> str: with _bootstrap_build_env( isolation, srcdir, distribution, config_settings, skip_dependency_check, dependency_constraints_txt, installer, env_dir, pyproject_hooks.quiet_subprocess_runner if _ctx.verbosity < 0 else None, ) as builder: return builder.build(distribution, outdir, config_settings) @contextlib.contextmanager def _handle_build_error(*, env_dir: str | None, sdist_extract_dir: StrPath | None) -> Generator[None]: try: yield except (BuildException, FailedProcessError) as e: _error(str(e)) except BuildBackendException as e: hint = _build_failure_hint(env_dir, sdist_extract_dir) if isinstance(e.exception, subprocess.CalledProcessError): _cprint() _cprint('{yellow}TIP{reset} {}', hint, file=sys.stderr) _error(str(e)) inner_exception = e.exception tb_lines = traceback.format_exception(inner_exception, limit=-1) tb = ''.join(tb_lines) _cprint('\n{dim}{}{reset}\n', tb.strip('\n')) _cprint('{yellow}TIP{reset} {}', hint, file=sys.stderr) _error(str(e)) except Exception as e: # pragma: no cover tb = traceback.format_exc().strip('\n') _cprint('\n{dim}{}{reset}\n', tb) _error(str(e)) def _build_failure_hint(env_dir: str | None, sdist_extract_dir: StrPath | None) -> str: kept = [ f'{label} at {os.fspath(path)}' for path, label in ((env_dir, 'the build environment'), (sdist_extract_dir, 'the extracted sources')) if path is not None ] if kept: action = f'inspect {" and ".join(kept)}' else: action = 'pass --env-dir and --sdist-extract-dir to keep the build environment and sources' docs = 'https://build.pypa.io/en/stable/how-to/troubleshooting.html#debug-a-failed-build' return f'{action}, then see {docs} for help debugging a failed build' def _natural_language_list(elements: Sequence[str]) -> str: if len(elements) == 0: msg = 'no elements' raise IndexError(msg) if len(elements) == 1: return elements[0] return '{} and {}'.format( ', '.join(elements[:-1]), elements[-1], ) def build_package( srcdir: StrPath, outdir: StrPath, distributions: Sequence[Distribution], config_settings: ConfigSettings | None = None, isolation: bool = True, skip_dependency_check: bool = False, dependency_constraints_txt: os.PathLike[str] | None = None, installer: _env.Installer = 'pip', env_dir: str | None = None, ) -> list[str]: """ Run the build process. :param srcdir: Source directory :param outdir: Output directory :param distribution: Distribution to build (sdist or wheel) :param config_settings: Configuration settings to be passed to the backend :param isolation: Isolate the build in a separate environment :param skip_dependency_check: Do not perform the dependency check :param env_dir: Location of the isolated build environment (a temporary directory is used when not set) """ built: list[str] = [] for distribution in distributions: out = _build( isolation, srcdir, outdir, distribution, config_settings, skip_dependency_check, dependency_constraints_txt, installer, env_dir, ) built.append(os.path.basename(out)) return built def build_package_via_sdist( srcdir: StrPath, outdir: StrPath, distributions: Sequence[Distribution], config_settings: ConfigSettings | None = None, isolation: bool = True, skip_dependency_check: bool = False, dependency_constraints_txt: os.PathLike[str] | None = None, installer: _env.Installer = 'pip', sdist_extract_dir: StrPath | None = None, env_dir: str | None = None, ) -> list[str]: """ Build a sdist and then the specified distributions from it. :param srcdir: Source directory :param outdir: Output directory :param distribution: Distribution to build (only wheel) :param config_settings: Configuration settings to be passed to the backend :param isolation: Isolate the build in a separate environment :param skip_dependency_check: Do not perform the dependency check :param sdist_extract_dir: Directory to extract the intermediate sdist into; a temporary directory is used and removed afterwards when ``None`` :param env_dir: Location of the isolated build environment (a temporary directory is used when not set) """ if 'sdist' in distributions: msg = 'Only binary distributions are allowed but sdist was specified' raise ValueError(msg) sdist = _build( isolation, srcdir, outdir, 'sdist', config_settings, skip_dependency_check, dependency_constraints_txt, installer, env_dir, ) sdist_name = os.path.basename(sdist) built: list[str] = [] if distributions: top_level = _validate_sdist_archive(sdist) with _extract_sdist(sdist, top_level, extract_dir=sdist_extract_dir) as extracted_srcdir: _ctx.log(f'Building {_natural_language_list(distributions)} from sdist', kind=('step',)) for distribution in distributions: out = _build( isolation, extracted_srcdir, outdir, distribution, config_settings, skip_dependency_check, dependency_constraints_txt, installer, env_dir, ) built.append(os.path.basename(out)) return [sdist_name, *built] def _build_metadata( srcdir: StrPath, outdir: StrPath, # noqa: ARG001 distributions: Sequence[Distribution], # noqa: ARG001 config_settings: ConfigSettings | None = None, isolation: bool = True, skip_dependency_check: bool = False, dependency_constraints_txt: os.PathLike[str] | None = None, installer: _env.Installer = 'pip', env_dir: str | None = None, ) -> list[str]: if os.path.isfile(srcdir) and os.fspath(srcdir).lower().endswith('.whl'): _print_metadata(_wheel_metadata(srcdir)) return [] def run_subprocess(cmd: Sequence[StrPath], cwd: str | None = None, extra_environ: Mapping[str, str] | None = None) -> None: env = os.environ.copy() if extra_environ: env.update(extra_environ) _ctx.run_subprocess(cmd, cwd, env) with ( _bootstrap_build_env( isolation, srcdir, 'wheel', config_settings, skip_dependency_check, dependency_constraints_txt, installer, env_dir, runner=run_subprocess, ) as builder, tempfile.TemporaryDirectory() as tempdir, open( os.path.join(builder.metadata_path(tempdir), 'METADATA'), 'rb', ) as metadata_file, ): _print_metadata(metadata_file.read()) return [] def _wheel_metadata(wheel: StrPath) -> bytes: with zipfile.ZipFile(wheel) as archive: names = [name for name in archive.namelist() if name.count('/') == 1 and name.endswith('.dist-info/METADATA')] if len(names) != 1: msg = f'{os.fspath(wheel)!r} is not a valid wheel: expected one .dist-info/METADATA, found {len(names)}' raise BuildException(msg) return archive.read(names[0]) def _print_metadata(raw_metadata: bytes) -> None: import packaging.metadata valid_metadata, _ = packaging.metadata.parse_email(raw_metadata) print( # noqa: T201 json.dumps(valid_metadata, ensure_ascii=False, indent=2), ) def main_parser() -> argparse.ArgumentParser: """ Construct the main parser. """ class NegativeCountAction(argparse.Action): def __init__( self, option_strings: Sequence[str], dest: str, default: int | None = None, help: str | None = None, ) -> None: super().__init__( option_strings=option_strings, dest=dest, nargs=0, default=default, help=help, ) def __call__( self, parser: argparse.ArgumentParser, # noqa: ARG002 namespace: argparse.Namespace, values: str | Sequence[str] | None, # noqa: ARG002 option_string: str | None = None, # noqa: ARG002 ) -> None: setattr(namespace, self.dest, getattr(namespace, self.dest, 0) - 1) make_parser = partial( argparse.ArgumentParser, add_help=False, description="""\ A simple, correct Python build frontend. By default, a source distribution (sdist) is built from the project root and a binary distribution (wheel) is built from the sdist. If this is undesirable, you can pass `--sdist` and/or `--wheel` to build distributions independently of each other. """.rstrip(), # Prevent argparse from taking up the entire width of the terminal window # which impedes readability. Also keep the description formatted. formatter_class=argparse.RawDescriptionHelpFormatter, ) if sys.version_info >= (3, 14): # pragma: no branch make_parser = partial(make_parser, suggest_on_error=True) # pragma: no cover parser = make_parser() parser.add_argument( 'srcdir', type=str, nargs='?', default=os.getcwd(), help='source directory, .tar.gz source distribution, or (with --metadata) a .whl to read metadata from ' '(defaults to the current working directory)', ) global_group = parser.add_argument_group('global options') global_group.add_argument( '-h', '--help', action='help', default=argparse.SUPPRESS, help='show this help message and exit', ) global_group.add_argument( '--version', '-V', action='version', version=f'build {build.__version__} ({",".join(build.__path__)})', ) verbosity_exclusive_group = global_group.add_mutually_exclusive_group() verbosity_exclusive_group.add_argument( '--quiet', '-q', dest='verbosity', action=NegativeCountAction, default=0, help='reduce verbosity', ) verbosity_exclusive_group.add_argument( '--verbose', '-v', dest='verbosity', action='count', default=0, help='increase verbosity', ) build_group = parser.add_argument_group('build options') build_group.add_argument( '--outdir', '-o', help=f'output directory (defaults to {{srcdir}}{os.sep}dist). Cannot be used together with ``--metadata``', metavar='PATH', ) build_group.add_argument( '--sdist-extract-dir', help='extract the intermediate sdist to PATH (created if missing and kept afterwards) instead of a random ' 'temporary directory; reusing it across rebuilds gives compiler caches such as ccache/sccache a stable ' 'source path. Only affects the default (via-sdist) build and building a wheel from an sdist', metavar='PATH', ) build_group.add_argument( '--sdist', '-s', dest='distributions', action='append_const', const='sdist', help='build a source distribution (disables the default behavior)', ) build_group.add_argument( '--wheel', '-w', dest='distributions', action='append_const', const='wheel', help='build a wheel (disables the default behavior)', ) build_group.add_argument( '--metadata', action='store_true', help="print out a wheel's metadata in JSON format, building it first unless the source argument is already a " '.whl. Cannot be used in conjunction with ``--sdist`` or ``--wheel``', ) build_group.add_argument( '--report', help='write a machine-readable JSON report of the built artifacts (name, path, kind, size and SHA-256 hash) ' 'to this path. Cannot be used together with ``--metadata``', metavar='PATH', ) config_exclusive_group = build_group.add_mutually_exclusive_group() config_exclusive_group.add_argument( '--config-setting', '-C', dest='config_settings', action='append', help='settings to pass to the backend. Multiple settings can be provided. ' 'Settings beginning with a hyphen will erroneously be interpreted as options to build if separated ' 'by a space; use ``--config-setting=--my-setting -C--my-other-setting`` instead. ' 'A setting passed without ``=VALUE`` is given an empty value, but this form is not supported by pip; ' 'write ``KEY=`` instead for compatibility', metavar='KEY=[VALUE]', ) config_exclusive_group.add_argument( '--config-json', help='settings to pass to the backend as a JSON object. ' 'This is an alternative to ``--config-setting`` that allows complex nested structures. ' 'Cannot be used together with ``--config-setting``', metavar='JSON_STRING', ) install_group = parser.add_argument_group('installation options') env_exclusive_group = install_group.add_mutually_exclusive_group() env_exclusive_group.add_argument( '--installer', choices=_env.INSTALLERS, default='pip', help='Python package installer to use (defaults to pip)', ) env_exclusive_group.add_argument( '--no-isolation', '-n', action='store_true', help='disable building the project in an isolated virtual environment. ' 'Build dependencies must be installed separately when this option is used', ) install_group.add_argument( '--env-dir', help='create the isolated build environment at this location instead of a temporary directory. The location ' 'must be empty; it is removed on success and kept on failure so it can be inspected', metavar='PATH', ) install_group.add_argument( '--dependency-constraints-txt', help='constrain build dependencies using a constraints.txt when installing dependencies', metavar='PATH', ) install_group.add_argument( '--skip-dependency-check', '-x', action='store_true', help='do not check that build dependencies are installed', ) return parser def _parse_config_settings(raw_config_settings: list[str]) -> dict[str, str | list[str]]: config_settings = dict[str, str | list[str]]() for arg in raw_config_settings: setting, sep, value = arg.partition('=') if not sep: warnings.warn( f'Config setting {setting!r} was passed without a value; this form is not supported by pip. ' f'Write {setting}= instead to be compatible with both tools', stacklevel=2, ) existing = config_settings.get(setting) if existing is None: config_settings[setting] = value elif isinstance(existing, list): existing.append(value) else: config_settings[setting] = [existing, value] return config_settings def main(cli_args: Sequence[str], prog: str | None = None) -> None: """ Parse the CLI arguments and invoke the build process. :param cli_args: CLI arguments :param prog: Program name to show in help text """ parser = main_parser() if prog: parser.prog = prog args = parser.parse_args(cli_args, _CliArgs()) if args.env_dir is not None and args.no_isolation: parser.error('--env-dir: not allowed with --no-isolation') _setup_cli(verbosity=args.verbosity) is_file = os.path.isfile(args.srcdir) sdist_input = is_file and os.fspath(args.srcdir).lower().endswith('.tar.gz') wheel_input = is_file and os.fspath(args.srcdir).lower().endswith('.whl') run_build = partial( _select_build(parser, args, sdist_input=sdist_input, wheel_input=wheel_input), config_settings=_resolve_config_settings(args), isolation=not args.no_isolation, skip_dependency_check=args.skip_dependency_check, dependency_constraints_txt=args.dependency_constraints_txt, installer=args.installer, env_dir=args.env_dir, ) if args.outdir is not None: outdir = args.outdir elif sdist_input or wheel_input: outdir = os.path.dirname(os.path.abspath(args.srcdir)) else: outdir = os.path.join(args.srcdir, 'dist') with _handle_build_error(env_dir=args.env_dir, sdist_extract_dir=args.sdist_extract_dir): if sdist_input: top_level = _validate_sdist_archive(args.srcdir) with _extract_sdist(args.srcdir, top_level, extract_dir=args.sdist_extract_dir) as extracted_srcdir: built = run_build(extracted_srcdir, outdir) else: built = run_build(args.srcdir, outdir) if args.report is not None: _write_report(args.report, outdir, built) if _ctx.verbosity >= -1 and built: artifact_list = _natural_language_list( ['{underline}{}{reset}{bold}{green}'.format(artifact, **_styles.get()['stdout']) for artifact in built] ) _cprint('{bold}{green}Successfully built {}{reset}', artifact_list) class _ArtifactReport(TypedDict): name: str path: str kind: str size: int hashes: dict[str, str] class _BuildReport(TypedDict): version: str artifacts: list[_ArtifactReport] def _write_report(path: StrPath, outdir: StrPath, artifacts: Sequence[str]) -> None: report: _BuildReport = { 'version': '1.0', 'artifacts': [_describe_artifact(os.path.join(outdir, name), name) for name in artifacts], } data = json.dumps(report, indent=2) + '\n' fd, tmp = tempfile.mkstemp(dir=os.path.dirname(os.path.abspath(path)), suffix='.tmp') try: with os.fdopen(fd, 'w', encoding='utf-8') as report_file: report_file.write(data) os.replace(tmp, path) except BaseException: with contextlib.suppress(OSError): os.unlink(tmp) raise def _describe_artifact(path: str, name: str) -> _ArtifactReport: digest = hashlib.sha256() size = 0 with open(path, 'rb') as artifact: while chunk := artifact.read(65536): size += len(chunk) digest.update(chunk) return { 'name': name, 'path': path, 'kind': 'sdist' if name.endswith('.tar.gz') else 'wheel', 'size': size, 'hashes': {'sha256': digest.hexdigest()}, } def _resolve_config_settings(args: _CliArgs) -> Mapping[str, JSONValue]: if args.config_json: try: config_settings = json.loads(args.config_json) except json.JSONDecodeError as e: _error(f'Invalid JSON in --config-json: {e}') if not isinstance(config_settings, dict): _error('--config-json must contain a JSON object (dict), not a list or primitive value') return config_settings if args.config_settings: return _parse_config_settings(args.config_settings) return {} def _select_build( parser: argparse.ArgumentParser, args: _CliArgs, *, sdist_input: bool, wheel_input: bool ) -> partial[list[str]]: if args.report is not None and args.metadata: parser.error('--report: not allowed with --metadata') if wheel_input and not args.metadata: parser.error('a wheel can only be used with --metadata, to read its metadata; it cannot be built from') if args.metadata and args.distributions: parser.error('--metadata: not allowed with --sdist or --wheel') if sdist_input and args.distributions and 'sdist' in args.distributions: parser.error( 'cannot build a source distribution from a source distribution; ' 'pass --wheel to build a wheel from the sdist (see https://github.com/pypa/build/issues/311)' ) if args.metadata: return partial(_build_metadata, distributions=['wheel']) if sdist_input: distributions: list[Distribution] = args.distributions or ['wheel'] return partial(build_package, distributions=distributions) if args.distributions: return partial(build_package, distributions=args.distributions) return partial(build_package_via_sdist, distributions=['wheel'], sdist_extract_dir=args.sdist_extract_dir) def _validate_sdist_archive(archive: StrPath) -> str: """Validate that ``archive`` is a PEP 625 source distribution and return its top-level directory name.""" name = os.path.basename(os.fspath(archive)) try: parse_sdist_filename(name) except (InvalidSdistFilename, InvalidVersion) as exc: msg = f'{name!r} does not look like a source distribution: {exc}' raise BuildException(msg) from exc try: with tar_open(archive) as tar: members = tar.getmembers() except (OSError, TarError) as exc: msg = f'failed to read source distribution {archive}: {exc}' raise BuildException(msg) from exc top_levels = {m.name.split('/', 1)[0] for m in members if m.name} top_levels.discard('') if len(top_levels) != 1: msg = f'source distribution {archive} must contain a single top-level directory, got: {sorted(top_levels)}' raise BuildException(msg) top = next(iter(top_levels)) if not any(m.name == f'{top}/PKG-INFO' and m.isfile() for m in members): msg = ( f'source distribution {archive} does not contain {top}/PKG-INFO; ' 'this does not appear to be a valid source distribution' ) raise BuildException(msg) return top @contextlib.contextmanager def _extract_sdist(archive: StrPath, top_level: str, *, extract_dir: StrPath | None = None) -> Generator[str]: if extract_dir is None: tmp_dir = tempfile.mkdtemp(prefix='build-via-sdist-') try: with tar_open(archive) as tar: safe_extractall(tar, tmp_dir) yield os.path.join(tmp_dir, top_level) finally: shutil.rmtree(tmp_dir, ignore_errors=True) else: root = os.fspath(extract_dir) os.makedirs(root, exist_ok=True) target = os.path.join(root, top_level) shutil.rmtree(target, ignore_errors=True) with tar_open(archive) as tar: safe_extractall(tar, root) yield target def entrypoint() -> None: main(sys.argv[1:]) if __name__ == '__main__': # pragma: no cover main(sys.argv[1:], 'python -m build') __all__ = [ 'main', 'main_parser', ]