317 lines
11 KiB
Python
317 lines
11 KiB
Python
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# Copyright 2015 Ian Cordasco
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import hashlib
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import io
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import logging
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import os
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import re
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import subprocess
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from typing import Dict, NamedTuple, Optional, Sequence, Tuple, Union
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import importlib_metadata
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import pkginfo
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from rich import print
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from twine import exceptions
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from twine import wheel
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from twine import wininst
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DIST_TYPES = {
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"bdist_wheel": wheel.Wheel,
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"bdist_wininst": wininst.WinInst,
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"bdist_egg": pkginfo.BDist,
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"sdist": pkginfo.SDist,
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}
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DIST_EXTENSIONS = {
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".whl": "bdist_wheel",
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".exe": "bdist_wininst",
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".egg": "bdist_egg",
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".tar.bz2": "sdist",
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".tar.gz": "sdist",
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".zip": "sdist",
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}
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MetadataValue = Union[str, Sequence[str]]
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logger = logging.getLogger(__name__)
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def _safe_name(name: str) -> str:
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"""Convert an arbitrary string to a standard distribution name.
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Any runs of non-alphanumeric/. characters are replaced with a single '-'.
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Copied from pkg_resources.safe_name for compatibility with warehouse.
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See https://github.com/pypa/twine/issues/743.
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"""
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return re.sub("[^A-Za-z0-9.]+", "-", name)
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class PackageFile:
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def __init__(
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self,
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filename: str,
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comment: Optional[str],
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metadata: pkginfo.Distribution,
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python_version: Optional[str],
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filetype: Optional[str],
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) -> None:
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self.filename = filename
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self.basefilename = os.path.basename(filename)
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self.comment = comment
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self.metadata = metadata
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self.python_version = python_version
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self.filetype = filetype
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self.safe_name = _safe_name(metadata.name)
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self.signed_filename = self.filename + ".asc"
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self.signed_basefilename = self.basefilename + ".asc"
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self.gpg_signature: Optional[Tuple[str, bytes]] = None
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hasher = HashManager(filename)
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hasher.hash()
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hexdigest = hasher.hexdigest()
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self.md5_digest = hexdigest.md5
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self.sha2_digest = hexdigest.sha2
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self.blake2_256_digest = hexdigest.blake2
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@classmethod
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def from_filename(cls, filename: str, comment: Optional[str]) -> "PackageFile":
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# Extract the metadata from the package
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for ext, dtype in DIST_EXTENSIONS.items():
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if filename.endswith(ext):
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try:
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meta = DIST_TYPES[dtype](filename)
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except EOFError:
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raise exceptions.InvalidDistribution(
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"Invalid distribution file: '%s'" % os.path.basename(filename)
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)
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else:
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break
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else:
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raise exceptions.InvalidDistribution(
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"Unknown distribution format: '%s'" % os.path.basename(filename)
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)
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# If pkginfo encounters a metadata version it doesn't support, it may give us
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# back empty metadata. At the very least, we should have a name and version,
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# which could also be empty if, for example, a MANIFEST.in doesn't include
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# setup.cfg.
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missing_fields = [
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f.capitalize() for f in ["name", "version"] if not getattr(meta, f)
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]
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if missing_fields:
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supported_metadata = list(pkginfo.distribution.HEADER_ATTRS)
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raise exceptions.InvalidDistribution(
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"Metadata is missing required fields: "
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f"{', '.join(missing_fields)}.\n"
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"Make sure the distribution includes the files where those fields "
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"are specified, and is using a supported Metadata-Version: "
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f"{', '.join(supported_metadata)}."
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)
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py_version: Optional[str]
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if dtype == "bdist_egg":
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(dist,) = importlib_metadata.Distribution.discover( # type: ignore[no-untyped-call] # python/importlib_metadata#288 # noqa: E501
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path=[filename]
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)
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py_version = dist.metadata["Version"]
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elif dtype == "bdist_wheel":
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py_version = meta.py_version
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elif dtype == "bdist_wininst":
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py_version = meta.py_version
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else:
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py_version = None
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return cls(filename, comment, meta, py_version, dtype)
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def metadata_dictionary(self) -> Dict[str, MetadataValue]:
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"""Merge multiple sources of metadata into a single dictionary.
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Includes values from filename, PKG-INFO, hashers, and signature.
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"""
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meta = self.metadata
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data = {
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# identify release
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"name": self.safe_name,
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"version": meta.version,
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# file content
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"filetype": self.filetype,
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"pyversion": self.python_version,
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# additional meta-data
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"metadata_version": meta.metadata_version,
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"summary": meta.summary,
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"home_page": meta.home_page,
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"author": meta.author,
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"author_email": meta.author_email,
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"maintainer": meta.maintainer,
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"maintainer_email": meta.maintainer_email,
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"license": meta.license,
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"description": meta.description,
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"keywords": meta.keywords,
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"platform": meta.platforms,
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"classifiers": meta.classifiers,
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"download_url": meta.download_url,
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"supported_platform": meta.supported_platforms,
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"comment": self.comment,
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"sha256_digest": self.sha2_digest,
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# PEP 314
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"provides": meta.provides,
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"requires": meta.requires,
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"obsoletes": meta.obsoletes,
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# Metadata 1.2
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"project_urls": meta.project_urls,
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"provides_dist": meta.provides_dist,
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"obsoletes_dist": meta.obsoletes_dist,
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"requires_dist": meta.requires_dist,
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"requires_external": meta.requires_external,
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"requires_python": meta.requires_python,
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# Metadata 2.1
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"provides_extras": meta.provides_extras,
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"description_content_type": meta.description_content_type,
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# Metadata 2.2
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"dynamic": meta.dynamic,
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}
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if self.gpg_signature is not None:
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data["gpg_signature"] = self.gpg_signature
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# FIPS disables MD5 and Blake2, making the digest values None. Some package
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# repositories don't allow null values, so this only sends non-null values.
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# See also: https://github.com/pypa/twine/issues/775
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if self.md5_digest:
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data["md5_digest"] = self.md5_digest
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if self.blake2_256_digest:
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data["blake2_256_digest"] = self.blake2_256_digest
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return data
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def add_gpg_signature(
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self, signature_filepath: str, signature_filename: str
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) -> None:
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if self.gpg_signature is not None:
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raise exceptions.InvalidDistribution("GPG Signature can only be added once")
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with open(signature_filepath, "rb") as gpg:
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self.gpg_signature = (signature_filename, gpg.read())
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def sign(self, sign_with: str, identity: Optional[str]) -> None:
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print(f"Signing {self.basefilename}")
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gpg_args: Tuple[str, ...] = (sign_with, "--detach-sign")
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if identity:
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gpg_args += ("--local-user", identity)
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gpg_args += ("-a", self.filename)
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self.run_gpg(gpg_args)
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self.add_gpg_signature(self.signed_filename, self.signed_basefilename)
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@classmethod
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def run_gpg(cls, gpg_args: Tuple[str, ...]) -> None:
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try:
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subprocess.check_call(gpg_args)
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return
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except FileNotFoundError:
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if gpg_args[0] != "gpg":
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raise exceptions.InvalidSigningExecutable(
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f"{gpg_args[0]} executable not available."
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)
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logger.warning("gpg executable not available. Attempting fallback to gpg2.")
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try:
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subprocess.check_call(("gpg2",) + gpg_args[1:])
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except FileNotFoundError:
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raise exceptions.InvalidSigningExecutable(
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"'gpg' or 'gpg2' executables not available.\n"
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"Try installing one of these or specifying an executable "
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"with the --sign-with flag."
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)
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class Hexdigest(NamedTuple):
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md5: Optional[str]
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sha2: Optional[str]
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blake2: Optional[str]
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class HashManager:
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"""Manage our hashing objects for simplicity.
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This will also allow us to better test this logic.
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"""
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def __init__(self, filename: str) -> None:
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"""Initialize our manager and hasher objects."""
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self.filename = filename
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self._md5_hasher = None
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try:
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self._md5_hasher = hashlib.md5()
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except ValueError:
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# FIPs mode disables MD5
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pass
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self._sha2_hasher = hashlib.sha256()
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self._blake_hasher = None
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try:
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self._blake_hasher = hashlib.blake2b(digest_size=256 // 8)
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except (ValueError, TypeError):
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# FIPS mode disables blake2
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pass
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def _md5_update(self, content: bytes) -> None:
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if self._md5_hasher is not None:
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self._md5_hasher.update(content)
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def _md5_hexdigest(self) -> Optional[str]:
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if self._md5_hasher is not None:
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return self._md5_hasher.hexdigest()
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return None
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def _sha2_update(self, content: bytes) -> None:
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if self._sha2_hasher is not None:
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self._sha2_hasher.update(content)
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def _sha2_hexdigest(self) -> Optional[str]:
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if self._sha2_hasher is not None:
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return self._sha2_hasher.hexdigest()
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return None
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def _blake_update(self, content: bytes) -> None:
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if self._blake_hasher is not None:
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self._blake_hasher.update(content)
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def _blake_hexdigest(self) -> Optional[str]:
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if self._blake_hasher is not None:
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return self._blake_hasher.hexdigest()
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return None
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def hash(self) -> None:
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"""Hash the file contents."""
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with open(self.filename, "rb") as fp:
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for content in iter(lambda: fp.read(io.DEFAULT_BUFFER_SIZE), b""):
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self._md5_update(content)
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self._sha2_update(content)
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self._blake_update(content)
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def hexdigest(self) -> Hexdigest:
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"""Return the hexdigest for the file."""
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return Hexdigest(
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self._md5_hexdigest(),
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self._sha2_hexdigest(),
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self._blake_hexdigest(),
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)
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