97 lines
2.7 KiB
Python
97 lines
2.7 KiB
Python
#!/usr/bin/env python3
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"""
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The runtimeDependenciesHook validates, that all dependencies specified
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in wheel metadata are available in the local environment.
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In case that does not hold, it will print missing dependencies and
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violated version constraints.
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"""
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import importlib.metadata
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import re
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import sys
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import tempfile
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from argparse import ArgumentParser
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from zipfile import ZipFile
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from packaging.metadata import Metadata, parse_email
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from packaging.requirements import Requirement
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argparser = ArgumentParser()
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argparser.add_argument("wheel", help="Path to the .whl file to test")
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def error(msg: str) -> None:
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print(f" - {msg}", file=sys.stderr)
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def normalize_name(name: str) -> str:
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"""
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Normalize package names according to PEP503
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"""
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return re.sub(r"[-_.]+", "-", name).lower()
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def get_manifest_text_from_wheel(wheel: str) -> str:
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"""
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Given a path to a wheel, this function will try to extract the
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METADATA file in the wheels .dist-info directory.
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"""
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with ZipFile(wheel) as zipfile:
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for zipinfo in zipfile.infolist():
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if zipinfo.filename.endswith(".dist-info/METADATA"):
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with tempfile.TemporaryDirectory() as tmp:
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path = zipfile.extract(zipinfo, path=tmp)
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with open(path, encoding="utf-8") as fd:
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return fd.read()
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raise RuntimeError("No METADATA file found in wheel")
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def get_metadata(wheel: str) -> Metadata:
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"""
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Given a path to a wheel, returns a parsed Metadata object.
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"""
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text = get_manifest_text_from_wheel(wheel)
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raw, _ = parse_email(text)
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metadata = Metadata.from_raw(raw)
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return metadata
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def test_requirement(requirement: Requirement) -> bool:
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"""
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Given a requirement specification, tests whether the dependency can
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be resolved in the local environment, and whether it satisfies the
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specified version constraints.
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"""
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if requirement.marker and not requirement.marker.evaluate():
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# ignore requirements with incompatible markers
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return True
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package_name = normalize_name(requirement.name)
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try:
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package = importlib.metadata.distribution(requirement.name)
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except importlib.metadata.PackageNotFoundError:
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error(f"{package_name} not installed")
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return False
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if package.version not in requirement.specifier:
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error(
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f"{package_name}{requirement.specifier} not satisfied by version {package.version}"
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)
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return False
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return True
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if __name__ == "__main__":
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args = argparser.parse_args()
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metadata = get_metadata(args.wheel)
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tests = [test_requirement(requirement) for requirement in metadata.requires_dist]
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if not all(tests):
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sys.exit(1)
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