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223 lines
8.2 KiB
Python
223 lines
8.2 KiB
Python
2 months ago
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"""Wheels support."""
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import email
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import itertools
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import os
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import posixpath
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import re
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import zipfile
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import contextlib
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from distutils.util import get_platform
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import pkg_resources
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import setuptools
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from pkg_resources import parse_version
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from setuptools.extern.packaging.tags import sys_tags
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from setuptools.extern.packaging.utils import canonicalize_name
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from setuptools.command.egg_info import write_requirements
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from setuptools.archive_util import _unpack_zipfile_obj
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WHEEL_NAME = re.compile(
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r"""^(?P<project_name>.+?)-(?P<version>\d.*?)
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((-(?P<build>\d.*?))?-(?P<py_version>.+?)-(?P<abi>.+?)-(?P<platform>.+?)
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)\.whl$""",
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re.VERBOSE).match
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NAMESPACE_PACKAGE_INIT = \
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"__import__('pkg_resources').declare_namespace(__name__)\n"
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def unpack(src_dir, dst_dir):
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'''Move everything under `src_dir` to `dst_dir`, and delete the former.'''
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for dirpath, dirnames, filenames in os.walk(src_dir):
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subdir = os.path.relpath(dirpath, src_dir)
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for f in filenames:
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src = os.path.join(dirpath, f)
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dst = os.path.join(dst_dir, subdir, f)
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os.renames(src, dst)
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for n, d in reversed(list(enumerate(dirnames))):
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src = os.path.join(dirpath, d)
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dst = os.path.join(dst_dir, subdir, d)
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if not os.path.exists(dst):
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# Directory does not exist in destination,
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# rename it and prune it from os.walk list.
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os.renames(src, dst)
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del dirnames[n]
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# Cleanup.
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for dirpath, dirnames, filenames in os.walk(src_dir, topdown=True):
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assert not filenames
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os.rmdir(dirpath)
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@contextlib.contextmanager
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def disable_info_traces():
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"""
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Temporarily disable info traces.
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"""
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from distutils import log
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saved = log.set_threshold(log.WARN)
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try:
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yield
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finally:
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log.set_threshold(saved)
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class Wheel:
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def __init__(self, filename):
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match = WHEEL_NAME(os.path.basename(filename))
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if match is None:
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raise ValueError('invalid wheel name: %r' % filename)
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self.filename = filename
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for k, v in match.groupdict().items():
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setattr(self, k, v)
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def tags(self):
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'''List tags (py_version, abi, platform) supported by this wheel.'''
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return itertools.product(
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self.py_version.split('.'),
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self.abi.split('.'),
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self.platform.split('.'),
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)
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def is_compatible(self):
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'''Is the wheel is compatible with the current platform?'''
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supported_tags = set(
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(t.interpreter, t.abi, t.platform) for t in sys_tags())
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return next((True for t in self.tags() if t in supported_tags), False)
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def egg_name(self):
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return pkg_resources.Distribution(
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project_name=self.project_name, version=self.version,
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platform=(None if self.platform == 'any' else get_platform()),
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).egg_name() + '.egg'
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def get_dist_info(self, zf):
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# find the correct name of the .dist-info dir in the wheel file
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for member in zf.namelist():
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dirname = posixpath.dirname(member)
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if (dirname.endswith('.dist-info') and
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canonicalize_name(dirname).startswith(
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canonicalize_name(self.project_name))):
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return dirname
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raise ValueError("unsupported wheel format. .dist-info not found")
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def install_as_egg(self, destination_eggdir):
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'''Install wheel as an egg directory.'''
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with zipfile.ZipFile(self.filename) as zf:
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self._install_as_egg(destination_eggdir, zf)
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def _install_as_egg(self, destination_eggdir, zf):
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dist_basename = '%s-%s' % (self.project_name, self.version)
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dist_info = self.get_dist_info(zf)
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dist_data = '%s.data' % dist_basename
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egg_info = os.path.join(destination_eggdir, 'EGG-INFO')
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self._convert_metadata(zf, destination_eggdir, dist_info, egg_info)
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self._move_data_entries(destination_eggdir, dist_data)
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self._fix_namespace_packages(egg_info, destination_eggdir)
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@staticmethod
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def _convert_metadata(zf, destination_eggdir, dist_info, egg_info):
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def get_metadata(name):
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with zf.open(posixpath.join(dist_info, name)) as fp:
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value = fp.read().decode('utf-8')
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return email.parser.Parser().parsestr(value)
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wheel_metadata = get_metadata('WHEEL')
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# Check wheel format version is supported.
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wheel_version = parse_version(wheel_metadata.get('Wheel-Version'))
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wheel_v1 = (
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parse_version('1.0') <= wheel_version < parse_version('2.0dev0')
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)
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if not wheel_v1:
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raise ValueError(
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'unsupported wheel format version: %s' % wheel_version)
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# Extract to target directory.
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_unpack_zipfile_obj(zf, destination_eggdir)
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# Convert metadata.
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dist_info = os.path.join(destination_eggdir, dist_info)
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dist = pkg_resources.Distribution.from_location(
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destination_eggdir, dist_info,
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metadata=pkg_resources.PathMetadata(destination_eggdir, dist_info),
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)
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# Note: Evaluate and strip markers now,
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# as it's difficult to convert back from the syntax:
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# foobar; "linux" in sys_platform and extra == 'test'
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def raw_req(req):
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req.marker = None
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return str(req)
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install_requires = list(map(raw_req, dist.requires()))
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extras_require = {
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extra: [
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req
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for req in map(raw_req, dist.requires((extra,)))
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if req not in install_requires
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]
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for extra in dist.extras
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}
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os.rename(dist_info, egg_info)
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os.rename(
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os.path.join(egg_info, 'METADATA'),
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os.path.join(egg_info, 'PKG-INFO'),
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)
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setup_dist = setuptools.Distribution(
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attrs=dict(
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install_requires=install_requires,
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extras_require=extras_require,
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),
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)
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with disable_info_traces():
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write_requirements(
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setup_dist.get_command_obj('egg_info'),
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None,
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os.path.join(egg_info, 'requires.txt'),
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)
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@staticmethod
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def _move_data_entries(destination_eggdir, dist_data):
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"""Move data entries to their correct location."""
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dist_data = os.path.join(destination_eggdir, dist_data)
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dist_data_scripts = os.path.join(dist_data, 'scripts')
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if os.path.exists(dist_data_scripts):
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egg_info_scripts = os.path.join(
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destination_eggdir, 'EGG-INFO', 'scripts')
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os.mkdir(egg_info_scripts)
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for entry in os.listdir(dist_data_scripts):
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# Remove bytecode, as it's not properly handled
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# during easy_install scripts install phase.
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if entry.endswith('.pyc'):
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os.unlink(os.path.join(dist_data_scripts, entry))
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else:
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os.rename(
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os.path.join(dist_data_scripts, entry),
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os.path.join(egg_info_scripts, entry),
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)
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os.rmdir(dist_data_scripts)
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for subdir in filter(os.path.exists, (
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os.path.join(dist_data, d)
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for d in ('data', 'headers', 'purelib', 'platlib')
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)):
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unpack(subdir, destination_eggdir)
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if os.path.exists(dist_data):
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os.rmdir(dist_data)
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@staticmethod
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def _fix_namespace_packages(egg_info, destination_eggdir):
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namespace_packages = os.path.join(
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egg_info, 'namespace_packages.txt')
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if os.path.exists(namespace_packages):
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with open(namespace_packages) as fp:
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namespace_packages = fp.read().split()
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for mod in namespace_packages:
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mod_dir = os.path.join(destination_eggdir, *mod.split('.'))
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mod_init = os.path.join(mod_dir, '__init__.py')
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if not os.path.exists(mod_dir):
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os.mkdir(mod_dir)
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if not os.path.exists(mod_init):
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with open(mod_init, 'w') as fp:
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fp.write(NAMESPACE_PACKAGE_INIT)
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