137 lines
4.4 KiB
Python
137 lines
4.4 KiB
Python
|
"""Support functions for working with wheel files.
|
||
|
|
"""
|
||
|
|
|
||
|
|
import logging
|
||
|
|
from email.message import Message
|
||
|
|
from email.parser import Parser
|
||
|
|
from typing import Tuple
|
||
|
|
from zipfile import BadZipFile, ZipFile
|
||
|
|
|
||
|
|
from pip._vendor.packaging.utils import canonicalize_name
|
||
|
|
|
||
|
|
from pip._internal.exceptions import UnsupportedWheel
|
||
|
|
|
||
|
|
VERSION_COMPATIBLE = (1, 0)
|
||
|
|
|
||
|
|
|
||
|
|
logger = logging.getLogger(__name__)
|
||
|
|
|
||
|
|
|
||
|
|
def parse_wheel(wheel_zip: ZipFile, name: str) -> Tuple[str, Message]:
|
||
|
|
"""Extract information from the provided wheel, ensuring it meets basic
|
||
|
|
standards.
|
||
|
|
|
||
|
|
Returns the name of the .dist-info directory and the parsed WHEEL metadata.
|
||
|
|
"""
|
||
|
|
try:
|
||
|
|
info_dir = wheel_dist_info_dir(wheel_zip, name)
|
||
|
|
metadata = wheel_metadata(wheel_zip, info_dir)
|
||
|
|
version = wheel_version(metadata)
|
||
|
|
except UnsupportedWheel as e:
|
||
|
|
raise UnsupportedWheel("{} has an invalid wheel, {}".format(name, str(e)))
|
||
|
|
|
||
|
|
check_compatibility(version, name)
|
||
|
|
|
||
|
|
return info_dir, metadata
|
||
|
|
|
||
|
|
|
||
|
|
def wheel_dist_info_dir(source: ZipFile, name: str) -> str:
|
||
|
|
"""Returns the name of the contained .dist-info directory.
|
||
|
|
|
||
|
|
Raises AssertionError or UnsupportedWheel if not found, >1 found, or
|
||
|
|
it doesn't match the provided name.
|
||
|
|
"""
|
||
|
|
# Zip file path separators must be /
|
||
|
|
subdirs = {p.split("/", 1)[0] for p in source.namelist()}
|
||
|
|
|
||
|
|
info_dirs = [s for s in subdirs if s.endswith(".dist-info")]
|
||
|
|
|
||
|
|
if not info_dirs:
|
||
|
|
raise UnsupportedWheel(".dist-info directory not found")
|
||
|
|
|
||
|
|
if len(info_dirs) > 1:
|
||
|
|
raise UnsupportedWheel(
|
||
|
|
"multiple .dist-info directories found: {}".format(", ".join(info_dirs))
|
||
|
|
)
|
||
|
|
|
||
|
|
info_dir = info_dirs[0]
|
||
|
|
|
||
|
|
info_dir_name = canonicalize_name(info_dir)
|
||
|
|
canonical_name = canonicalize_name(name)
|
||
|
|
if not info_dir_name.startswith(canonical_name):
|
||
|
|
raise UnsupportedWheel(
|
||
|
|
".dist-info directory {!r} does not start with {!r}".format(
|
||
|
|
info_dir, canonical_name
|
||
|
|
)
|
||
|
|
)
|
||
|
|
|
||
|
|
return info_dir
|
||
|
|
|
||
|
|
|
||
|
|
def read_wheel_metadata_file(source: ZipFile, path: str) -> bytes:
|
||
|
|
try:
|
||
|
|
return source.read(path)
|
||
|
|
# BadZipFile for general corruption, KeyError for missing entry,
|
||
|
|
# and RuntimeError for password-protected files
|
||
|
|
except (BadZipFile, KeyError, RuntimeError) as e:
|
||
|
|
raise UnsupportedWheel(f"could not read {path!r} file: {e!r}")
|
||
|
|
|
||
|
|
|
||
|
|
def wheel_metadata(source: ZipFile, dist_info_dir: str) -> Message:
|
||
|
|
"""Return the WHEEL metadata of an extracted wheel, if possible.
|
||
|
|
Otherwise, raise UnsupportedWheel.
|
||
|
|
"""
|
||
|
|
path = f"{dist_info_dir}/WHEEL"
|
||
|
|
# Zip file path separators must be /
|
||
|
|
wheel_contents = read_wheel_metadata_file(source, path)
|
||
|
|
|
||
|
|
try:
|
||
|
|
wheel_text = wheel_contents.decode()
|
||
|
|
except UnicodeDecodeError as e:
|
||
|
|
raise UnsupportedWheel(f"error decoding {path!r}: {e!r}")
|
||
|
|
|
||
|
|
# FeedParser (used by Parser) does not raise any exceptions. The returned
|
||
|
|
# message may have .defects populated, but for backwards-compatibility we
|
||
|
|
# currently ignore them.
|
||
|
|
return Parser().parsestr(wheel_text)
|
||
|
|
|
||
|
|
|
||
|
|
def wheel_version(wheel_data: Message) -> Tuple[int, ...]:
|
||
|
|
"""Given WHEEL metadata, return the parsed Wheel-Version.
|
||
|
|
Otherwise, raise UnsupportedWheel.
|
||
|
|
"""
|
||
|
|
version_text = wheel_data["Wheel-Version"]
|
||
|
|
if version_text is None:
|
||
|
|
raise UnsupportedWheel("WHEEL is missing Wheel-Version")
|
||
|
|
|
||
|
|
version = version_text.strip()
|
||
|
|
|
||
|
|
try:
|
||
|
|
return tuple(map(int, version.split(".")))
|
||
|
|
except ValueError:
|
||
|
|
raise UnsupportedWheel(f"invalid Wheel-Version: {version!r}")
|
||
|
|
|
||
|
|
|
||
|
|
def check_compatibility(version: Tuple[int, ...], name: str) -> None:
|
||
|
|
"""Raises errors or warns if called with an incompatible Wheel-Version.
|
||
|
|
|
||
|
|
pip should refuse to install a Wheel-Version that's a major series
|
||
|
|
ahead of what it's compatible with (e.g 2.0 > 1.1); and warn when
|
||
|
|
installing a version only minor version ahead (e.g 1.2 > 1.1).
|
||
|
|
|
||
|
|
version: a 2-tuple representing a Wheel-Version (Major, Minor)
|
||
|
|
name: name of wheel or package to raise exception about
|
||
|
|
|
||
|
|
:raises UnsupportedWheel: when an incompatible Wheel-Version is given
|
||
|
|
"""
|
||
|
|
if version[0] > VERSION_COMPATIBLE[0]:
|
||
|
|
raise UnsupportedWheel(
|
||
|
|
"{}'s Wheel-Version ({}) is not compatible with this version "
|
||
|
|
"of pip".format(name, ".".join(map(str, version)))
|
||
|
|
)
|
||
|
|
elif version > VERSION_COMPATIBLE:
|
||
|
|
logger.warning(
|
||
|
|
"Installing from a newer Wheel-Version (%s)",
|
||
|
|
".".join(map(str, version)),
|
||
|
|
)
|