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pyprojecttoml.py
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""" Load setuptools configuration from ``pyproject.toml`` files. **PRIVATE MODULE**: API reserved for setuptools internal usage only. To read project metadata, consider using ``build.util.project_wheel_metadata`` (https://pypi.org/project/build/). For simple scenarios, you can also try parsing the file directly with the help of ``tomllib`` or ``tomli``. """ from __future__ import annotations import logging import os from contextlib import contextmanager from functools import partial from typing import TYPE_CHECKING, Callable, Mapping from .._path import StrPath from ..errors import FileError, InvalidConfigError from ..warnings import SetuptoolsWarning from . import expand as _expand from ._apply_pyprojecttoml import _PREVIOUSLY_DEFINED, _MissingDynamic from ._apply_pyprojecttoml import apply as _apply if TYPE_CHECKING: from setuptools.dist import Distribution from typing_extensions import Self _logger = logging.getLogger(__name__) def load_file(filepath: StrPath) -> dict: from ..compat.py310 import tomllib with open(filepath, "rb") as file: return tomllib.load(file) def validate(config: dict, filepath: StrPath) -> bool: from . import _validate_pyproject as validator trove_classifier = validator.FORMAT_FUNCTIONS.get("trove-classifier") if hasattr(trove_classifier, "_disable_download"): # Improve reproducibility by default. See issue 31 for validate-pyproject. trove_classifier._disable_download() # type: ignore try: return validator.validate(config) except validator.ValidationError as ex: summary = f"configuration error: {ex.summary}" if ex.name.strip("`") != "project": # Probably it is just a field missing/misnamed, not worthy the verbosity... _logger.debug(summary) _logger.debug(ex.details) error = f"invalid pyproject.toml config: {ex.name}." raise ValueError(f"{error}\n{summary}") from None def apply_configuration( dist: Distribution, filepath: StrPath, ignore_option_errors=False, ) -> Distribution: """Apply the configuration from a ``pyproject.toml`` file into an existing distribution object. """ config = read_configuration(filepath, True, ignore_option_errors, dist) return _apply(dist, config, filepath) def read_configuration( filepath: StrPath, expand=True, ignore_option_errors=False, dist: Distribution | None = None, ): """Read given configuration file and returns options from it as a dict. :param str|unicode filepath: Path to configuration file in the ``pyproject.toml`` format. :param bool expand: Whether to expand directives and other computed values (i.e. post-process the given configuration) :param bool ignore_option_errors: Whether to silently ignore options, values of which could not be resolved (e.g. due to exceptions in directives such as file:, attr:, etc.). If False exceptions are propagated as expected. :param Distribution|None: Distribution object to which the configuration refers. If not given a dummy object will be created and discarded after the configuration is read. This is used for auto-discovery of packages and in the case a dynamic configuration (e.g. ``attr`` or ``cmdclass``) is expanded. When ``expand=False`` this object is simply ignored. :rtype: dict """ filepath = os.path.abspath(filepath) if not os.path.isfile(filepath): raise FileError(f"Configuration file {filepath!r} does not exist.") asdict = load_file(filepath) or {} project_table = asdict.get("project", {}) tool_table = asdict.get("tool", {}) setuptools_table = tool_table.get("setuptools", {}) if not asdict or not (project_table or setuptools_table): return {} # User is not using pyproject to configure setuptools if "setuptools" in asdict.get("tools", {}): # let the user know they probably have a typo in their metadata _ToolsTypoInMetadata.emit() if "distutils" in tool_table: _ExperimentalConfiguration.emit(subject="[tool.distutils]") # There is an overall sense in the community that making include_package_data=True # the default would be an improvement. # `ini2toml` backfills include_package_data=False when nothing is explicitly given, # therefore setting a default here is backwards compatible. if dist and getattr(dist, "include_package_data", None) is not None: setuptools_table.setdefault("include-package-data", dist.include_package_data) else: setuptools_table.setdefault("include-package-data", True) # Persist changes: asdict["tool"] = tool_table tool_table["setuptools"] = setuptools_table with _ignore_errors(ignore_option_errors): # Don't complain about unrelated errors (e.g. tools not using the "tool" table) subset = {"project": project_table, "tool": {"setuptools": setuptools_table}} validate(subset, filepath) if expand: root_dir = os.path.dirname(filepath) return expand_configuration(asdict, root_dir, ignore_option_errors, dist) return asdict def expand_configuration( config: dict, root_dir: StrPath | None = None, ignore_option_errors: bool = False, dist: Distribution | None = None, ) -> dict: """Given a configuration with unresolved fields (e.g. dynamic, cmdclass, ...) find their final values. :param dict config: Dict containing the configuration for the distribution :param str root_dir: Top-level directory for the distribution/project (the same directory where ``pyproject.toml`` is place) :param bool ignore_option_errors: see :func:`read_configuration` :param Distribution|None: Distribution object to which the configuration refers. If not given a dummy object will be created and discarded after the configuration is read. Used in the case a dynamic configuration (e.g. ``attr`` or ``cmdclass``). :rtype: dict """ return _ConfigExpander(config, root_dir, ignore_option_errors, dist).expand() class _ConfigExpander: def __init__( self, config: dict, root_dir: StrPath | None = None, ignore_option_errors: bool = False, dist: Distribution | None = None, ): self.config = config self.root_dir = root_dir or os.getcwd() self.project_cfg = config.get("project", {}) self.dynamic = self.project_cfg.get("dynamic", []) self.setuptools_cfg = config.get("tool", {}).get("setuptools", {}) self.dynamic_cfg = self.setuptools_cfg.get("dynamic", {}) self.ignore_option_errors = ignore_option_errors self._dist = dist self._referenced_files: set[str] = set() def _ensure_dist(self) -> Distribution: from setuptools.dist import Distribution attrs = {"src_root": self.root_dir, "name": self.project_cfg.get("name", None)} return self._dist or Distribution(attrs) def _process_field(self, container: dict, field: str, fn: Callable): if field in container: with _ignore_errors(self.ignore_option_errors): container[field] = fn(container[field]) def _canonic_package_data(self, field="package-data"): package_data = self.setuptools_cfg.get(field, {}) return _expand.canonic_package_data(package_data) def expand(self): self._expand_packages() self._canonic_package_data() self._canonic_package_data("exclude-package-data") # A distribution object is required for discovering the correct package_dir dist = self._ensure_dist() ctx = _EnsurePackagesDiscovered(dist, self.project_cfg, self.setuptools_cfg) with ctx as ensure_discovered: package_dir = ensure_discovered.package_dir self._expand_data_files() self._expand_cmdclass(package_dir) self._expand_all_dynamic(dist, package_dir) dist._referenced_files.update(self._referenced_files) return self.config def _expand_packages(self): packages = self.setuptools_cfg.get("packages") if packages is None or isinstance(packages, (list, tuple)): return find = packages.get("find") if isinstance(find, dict): find["root_dir"] = self.root_dir find["fill_package_dir"] = self.setuptools_cfg.setdefault("package-dir", {}) with _ignore_errors(self.ignore_option_errors): self.setuptools_cfg["packages"] = _expand.find_packages(**find) def _expand_data_files(self): data_files = partial(_expand.canonic_data_files, root_dir=self.root_dir) self._process_field(self.setuptools_cfg, "data-files", data_files) def _expand_cmdclass(self, package_dir: Mapping[str, str]): root_dir = self.root_dir cmdclass = partial(_expand.cmdclass, package_dir=package_dir, root_dir=root_dir) self._process_field(self.setuptools_cfg, "cmdclass", cmdclass) def _expand_all_dynamic(self, dist: Distribution, package_dir: Mapping[str, str]): special = ( # need special handling "version", "readme", "entry-points", "scripts", "gui-scripts", "classifiers", "dependencies", "optional-dependencies", ) # `_obtain` functions are assumed to raise appropriate exceptions/warnings. obtained_dynamic = { field: self._obtain(dist, field, package_dir) for field in self.dynamic if field not in special } obtained_dynamic.update( self._obtain_entry_points(dist, package_dir) or {}, version=self._obtain_version(dist, package_dir), readme=self._obtain_readme(dist), classifiers=self._obtain_classifiers(dist), dependencies=self._obtain_dependencies(dist), optional_dependencies=self._obtain_optional_dependencies(dist), ) # `None` indicates there is nothing in `tool.setuptools.dynamic` but the value # might have already been set by setup.py/extensions, so avoid overwriting. updates = {k: v for k, v in obtained_dynamic.items() if v is not None} self.project_cfg.update(updates) def _ensure_previously_set(self, dist: Distribution, field: str): previous = _PREVIOUSLY_DEFINED[field](dist) if previous is None and not self.ignore_option_errors: msg = ( f"No configuration found for dynamic {field!r}.\n" "Some dynamic fields need to be specified via `tool.setuptools.dynamic`" "\nothers must be specified via the equivalent attribute in `setup.py`." ) raise InvalidConfigError(msg) def _expand_directive( self, specifier: str, directive, package_dir: Mapping[str, str] ): from setuptools.extern.more_itertools import always_iterable with _ignore_errors(self.ignore_option_errors): root_dir = self.root_dir if "file" in directive: self._referenced_files.update(always_iterable(directive["file"])) return _expand.read_files(directive["file"], root_dir) if "attr" in directive: return _expand.read_attr(directive["attr"], package_dir, root_dir) raise ValueError(f"invalid `{specifier}`: {directive!r}") return None def _obtain(self, dist: Distribution, field: str, package_dir: Mapping[str, str]): if field in self.dynamic_cfg: return self._expand_directive( f"tool.setuptools.dynamic.{field}", self.dynamic_cfg[field], package_dir, ) self._ensure_previously_set(dist, field) return None def _obtain_version(self, dist: Distribution, package_dir: Mapping[str, str]): # Since plugins can set version, let's silently skip if it cannot be obtained if "version" in self.dynamic and "version" in self.dynamic_cfg: return _expand.version(self._obtain(dist, "version", package_dir)) return None def _obtain_readme(self, dist: Distribution) -> dict[str, str] | None: if "readme" not in self.dynamic: return None dynamic_cfg = self.dynamic_cfg if "readme" in dynamic_cfg: return { "text": self._obtain(dist, "readme", {}), "content-type": dynamic_cfg["readme"].get("content-type", "text/x-rst"), } self._ensure_previously_set(dist, "readme") return None def _obtain_entry_points( self, dist: Distribution, package_dir: Mapping[str, str] ) -> dict[str, dict] | None: fields = ("entry-points", "scripts", "gui-scripts") if not any(field in self.dynamic for field in fields): return None text = self._obtain(dist, "entry-points", package_dir) if text is None: return None groups = _expand.entry_points(text) expanded = {"entry-points": groups} def _set_scripts(field: str, group: str): if group in groups: value = groups.pop(group) if field not in self.dynamic: raise InvalidConfigError(_MissingDynamic.details(field, value)) expanded[field] = value _set_scripts("scripts", "console_scripts") _set_scripts("gui-scripts", "gui_scripts") return expanded def _obtain_classifiers(self, dist: Distribution): if "classifiers" in self.dynamic: value = self._obtain(dist, "classifiers", {}) if value: return value.splitlines() return None def _obtain_dependencies(self, dist: Distribution): if "dependencies" in self.dynamic: value = self._obtain(dist, "dependencies", {}) if value: return _parse_requirements_list(value) return None def _obtain_optional_dependencies(self, dist: Distribution): if "optional-dependencies" not in self.dynamic: return None if "optional-dependencies" in self.dynamic_cfg: optional_dependencies_map = self.dynamic_cfg["optional-dependencies"] assert isinstance(optional_dependencies_map, dict) return { group: _parse_requirements_list( self._expand_directive( f"tool.setuptools.dynamic.optional-dependencies.{group}", directive, {}, ) ) for group, directive in optional_dependencies_map.items() } self._ensure_previously_set(dist, "optional-dependencies") return None def _parse_requirements_list(value): return [ line for line in value.splitlines() if line.strip() and not line.strip().startswith("#") ] @contextmanager def _ignore_errors(ignore_option_errors: bool): if not ignore_option_errors: yield return try: yield except Exception as ex: _logger.debug(f"ignored error: {ex.__class__.__name__} - {ex}") class _EnsurePackagesDiscovered(_expand.EnsurePackagesDiscovered): def __init__( self, distribution: Distribution, project_cfg: dict, setuptools_cfg: dict ): super().__init__(distribution) self._project_cfg = project_cfg self._setuptools_cfg = setuptools_cfg def __enter__(self) -> Self: """When entering the context, the values of ``packages``, ``py_modules`` and ``package_dir`` that are missing in ``dist`` are copied from ``setuptools_cfg``. """ dist, cfg = self._dist, self._setuptools_cfg package_dir: dict[str, str] = cfg.setdefault("package-dir", {}) package_dir.update(dist.package_dir or {}) dist.package_dir = package_dir # needs to be the same object dist.set_defaults._ignore_ext_modules() # pyproject.toml-specific behaviour # Set `name`, `py_modules` and `packages` in dist to short-circuit # auto-discovery, but avoid overwriting empty lists purposefully set by users. if dist.metadata.name is None: dist.metadata.name = self._project_cfg.get("name") if dist.py_modules is None: dist.py_modules = cfg.get("py-modules") if dist.packages is None: dist.packages = cfg.get("packages") return super().__enter__() def __exit__(self, exc_type, exc_value, traceback): """When exiting the context, if values of ``packages``, ``py_modules`` and ``package_dir`` are missing in ``setuptools_cfg``, copy from ``dist``. """ # If anything was discovered set them back, so they count in the final config. self._setuptools_cfg.setdefault("packages", self._dist.packages) self._setuptools_cfg.setdefault("py-modules", self._dist.py_modules) return super().__exit__(exc_type, exc_value, traceback) class _ExperimentalConfiguration(SetuptoolsWarning): _SUMMARY = ( "`{subject}` in `pyproject.toml` is still *experimental* " "and likely to change in future releases." ) class _ToolsTypoInMetadata(SetuptoolsWarning): _SUMMARY = ( "Ignoring [tools.setuptools] in pyproject.toml, did you mean [tool.setuptools]?" )