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from __future__ import annotations from operator import attrgetter from zipfile import ZipFile class Wheel: def __init__(self, path) -> None: # https://www.python.org/dev/peps/pep-0427/#file-name-convention # The wheel filename is {distribution}-{version}(-{build tag})?-{python tag}-{abi tag}-{platform tag}.whl self.path = path self._parts = path.stem.split("-") @classmethod def from_path(cls, path): if path is not None and path.suffix == ".whl" and len(path.stem.split("-")) >= 5: # noqa: PLR2004 return cls(path) return None @property def distribution(self): return self._parts[0] @property def version(self): return self._parts[1] @property def version_tuple(self): return self.as_version_tuple(self.version) @staticmethod def as_version_tuple(version): result = [] for part in version.split(".")[0:3]: try: result.append(int(part)) except ValueError: # noqa: PERF203 break if not result: raise ValueError(version) return tuple(result) @property def name(self): return self.path.name def support_py(self, py_version): name = f"{'-'.join(self.path.stem.split('-')[0:2])}.dist-info/METADATA" with ZipFile(str(self.path), "r") as zip_file: metadata = zip_file.read(name).decode("utf-8") marker = "Requires-Python:" requires = next((i[len(marker) :] for i in metadata.splitlines() if i.startswith(marker)), None) if requires is None: # if it does not specify a python requires the assumption is compatible return True py_version_int = tuple(int(i) for i in py_version.split(".")) for require in (i.strip() for i in requires.split(",")): # https://www.python.org/dev/peps/pep-0345/#version-specifiers for operator, check in [ ("!=", lambda v: py_version_int != v), ("==", lambda v: py_version_int == v), ("<=", lambda v: py_version_int <= v), (">=", lambda v: py_version_int >= v), ("<", lambda v: py_version_int < v), (">", lambda v: py_version_int > v), ]: if require.startswith(operator): ver_str = require[len(operator) :].strip() version = tuple((int(i) if i != "*" else None) for i in ver_str.split("."))[0:2] if not check(version): return False break return True def __repr__(self) -> str: return f"{self.__class__.__name__}({self.path})" def __str__(self) -> str: return str(self.path) def discover_wheels(from_folder, distribution, version, for_py_version): wheels = [] for filename in from_folder.iterdir(): wheel = Wheel.from_path(filename) if ( wheel and wheel.distribution == distribution and (version is None or wheel.version == version) and wheel.support_py(for_py_version) ): wheels.append(wheel) return sorted(wheels, key=attrgetter("version_tuple", "distribution"), reverse=True) class Version: #: the version bundled with virtualenv bundle = "bundle" embed = "embed" #: custom version handlers non_version = (bundle, embed) @staticmethod def of_version(value): return None if value in Version.non_version else value @staticmethod def as_pip_req(distribution, version): return f"{distribution}{Version.as_version_spec(version)}" @staticmethod def as_version_spec(version): of_version = Version.of_version(version) return "" if of_version is None else f"=={of_version}" __all__ = [ "Version", "Wheel", "discover_wheels", ]
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