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Edit File : wheel.py \| Size : 7.90 KB
"""Wheels support.""" from distutils.util import get_platform import email import itertools import os import posixpath import re import zipfile import pkg_resources import setuptools from pkg_resources import parse_version from setuptools.extern.packaging.utils import canonicalize_name from setuptools.extern.six import PY3 from setuptools import pep425tags from setuptools.command.egg_info import write_requirements __metaclass__ = type WHEEL_NAME = re.compile( r"""^(?P<project_name>.+?)-(?P<version>\d.?) ((-(?P<build>\d.?))?-(?P<py_version>.+?)-(?P<abi>.+?)-(?P<platform>.+?) )\.whl$""", re.VERBOSE).match NAMESPACE_PACKAGE_INIT = '''\ try: __import__('pkg_resources').declare_namespace(__name__) except ImportError: __path__ = __import__('pkgutil').extend_path(__path__, __name__) ''' def unpack(src_dir, dst_dir): '''Move everything under `src_dir` to `dst_dir`, and delete the former.''' for dirpath, dirnames, filenames in os.walk(src_dir): subdir = os.path.relpath(dirpath, src_dir) for f in filenames: src = os.path.join(dirpath, f) dst = os.path.join(dst_dir, subdir, f) os.renames(src, dst) for n, d in reversed(list(enumerate(dirnames))): src = os.path.join(dirpath, d) dst = os.path.join(dst_dir, subdir, d) if not os.path.exists(dst): # Directory does not exist in destination, # rename it and prune it from os.walk list. os.renames(src, dst) del dirnames[n] # Cleanup. for dirpath, dirnames, filenames in os.walk(src_dir, topdown=True): assert not filenames os.rmdir(dirpath) class Wheel: def __init__(self, filename): match = WHEEL_NAME(os.path.basename(filename)) if match is None: raise ValueError('invalid wheel name: %r' % filename) self.filename = filename for k, v in match.groupdict().items(): setattr(self, k, v) def tags(self): '''List tags (py_version, abi, platform) supported by this wheel.''' return itertools.product( self.py_version.split('.'), self.abi.split('.'), self.platform.split('.'), ) def is_compatible(self): '''Is the wheel is compatible with the current platform?''' supported_tags = pep425tags.get_supported() return next((True for t in self.tags() if t in supported_tags), False) def egg_name(self): return pkg_resources.Distribution( project_name=self.project_name, version=self.version, platform=(None if self.platform == 'any' else get_platform()), ).egg_name() + '.egg' def get_dist_info(self, zf): # find the correct name of the .dist-info dir in the wheel file for member in zf.namelist(): dirname = posixpath.dirname(member) if (dirname.endswith('.dist-info') and canonicalize_name(dirname).startswith( canonicalize_name(self.project_name))): return dirname raise ValueError("unsupported wheel format. .dist-info not found") def install_as_egg(self, destination_eggdir): '''Install wheel as an egg directory.''' with zipfile.ZipFile(self.filename) as zf: self._install_as_egg(destination_eggdir, zf) def _install_as_egg(self, destination_eggdir, zf): dist_basename = '%s-%s' % (self.project_name, self.version) dist_info = self.get_dist_info(zf) dist_data = '%s.data' % dist_basename egg_info = os.path.join(destination_eggdir, 'EGG-INFO') self._convert_metadata(zf, destination_eggdir, dist_info, egg_info) self._move_data_entries(destination_eggdir, dist_data) self._fix_namespace_packages(egg_info, destination_eggdir) @staticmethod def _convert_metadata(zf, destination_eggdir, dist_info, egg_info): def get_metadata(name): with zf.open(posixpath.join(dist_info, name)) as fp: value = fp.read().decode('utf-8') if PY3 else fp.read() return email.parser.Parser().parsestr(value) wheel_metadata = get_metadata('WHEEL') # Check wheel format version is supported. wheel_version = parse_version(wheel_metadata.get('Wheel-Version')) wheel_v1 = ( parse_version('1.0') <= wheel_version < parse_version('2.0dev0') ) if not wheel_v1: raise ValueError( 'unsupported wheel format version: %s' % wheel_version) # Extract to target directory. os.mkdir(destination_eggdir) zf.extractall(destination_eggdir) # Convert metadata. dist_info = os.path.join(destination_eggdir, dist_info) dist = pkg_resources.Distribution.from_location( destination_eggdir, dist_info, metadata=pkg_resources.PathMetadata(destination_eggdir, dist_info), ) # Note: Evaluate and strip markers now, # as it's difficult to convert back from the syntax: # foobar; "linux" in sys_platform and extra == 'test' def raw_req(req): req.marker = None return str(req) install_requires = list(sorted(map(raw_req, dist.requires()))) extras_require = { extra: sorted( req for req in map(raw_req, dist.requires((extra,))) if req not in install_requires ) for extra in dist.extras } os.rename(dist_info, egg_info) os.rename( os.path.join(egg_info, 'METADATA'), os.path.join(egg_info, 'PKG-INFO'), ) setup_dist = setuptools.Distribution( attrs=dict( install_requires=install_requires, extras_require=extras_require, ), ) write_requirements( setup_dist.get_command_obj('egg_info'), None, os.path.join(egg_info, 'requires.txt'), ) @staticmethod def _move_data_entries(destination_eggdir, dist_data): """Move data entries to their correct location.""" dist_data = os.path.join(destination_eggdir, dist_data) dist_data_scripts = os.path.join(dist_data, 'scripts') if os.path.exists(dist_data_scripts): egg_info_scripts = os.path.join( destination_eggdir, 'EGG-INFO', 'scripts') os.mkdir(egg_info_scripts) for entry in os.listdir(dist_data_scripts): # Remove bytecode, as it's not properly handled # during easy_install scripts install phase. if entry.endswith('.pyc'): os.unlink(os.path.join(dist_data_scripts, entry)) else: os.rename( os.path.join(dist_data_scripts, entry), os.path.join(egg_info_scripts, entry), ) os.rmdir(dist_data_scripts) for subdir in filter(os.path.exists, ( os.path.join(dist_data, d) for d in ('data', 'headers', 'purelib', 'platlib') )): unpack(subdir, destination_eggdir) if os.path.exists(dist_data): os.rmdir(dist_data) @staticmethod def _fix_namespace_packages(egg_info, destination_eggdir): namespace_packages = os.path.join( egg_info, 'namespace_packages.txt') if os.path.exists(namespace_packages): with open(namespace_packages) as fp: namespace_packages = fp.read().split() for mod in namespace_packages: mod_dir = os.path.join(destination_eggdir, *mod.split('.')) mod_init = os.path.join(mod_dir, '__init__.py') if os.path.exists(mod_dir) and not os.path.exists(mod_init): with open(mod_init, 'w') as fp: fp.write(NAMESPACE_PACKAGE_INIT) Back

Edit File : wheel.py | Size : 7.90 KB

"""Wheels support."""

from distutils.util import get_platform
import email
import itertools
import os
import posixpath
import re
import zipfile

import pkg_resources
import setuptools
from pkg_resources import parse_version
from setuptools.extern.packaging.utils import canonicalize_name
from setuptools.extern.six import PY3
from setuptools import pep425tags
from setuptools.command.egg_info import write_requirements

__metaclass__ = type

WHEEL_NAME = re.compile(
    r"""^(?P<project_name>.+?)-(?P<version>\d.*?)
    ((-(?P<build>\d.*?))?-(?P<py_version>.+?)-(?P<abi>.+?)-(?P<platform>.+?)
    )\.whl$""",
    re.VERBOSE).match

NAMESPACE_PACKAGE_INIT = '''\
try:
    __import__('pkg_resources').declare_namespace(__name__)
except ImportError:
    __path__ = __import__('pkgutil').extend_path(__path__, __name__)
'''

def unpack(src_dir, dst_dir):
    '''Move everything under `src_dir` to `dst_dir`, and delete the former.'''
    for dirpath, dirnames, filenames in os.walk(src_dir):
        subdir = os.path.relpath(dirpath, src_dir)
        for f in filenames:
            src = os.path.join(dirpath, f)
            dst = os.path.join(dst_dir, subdir, f)
            os.renames(src, dst)
        for n, d in reversed(list(enumerate(dirnames))):
            src = os.path.join(dirpath, d)
            dst = os.path.join(dst_dir, subdir, d)
            if not os.path.exists(dst):
                # Directory does not exist in destination,
                # rename it and prune it from os.walk list.
                os.renames(src, dst)
                del dirnames[n]
    # Cleanup.
    for dirpath, dirnames, filenames in os.walk(src_dir, topdown=True):
        assert not filenames
        os.rmdir(dirpath)

class Wheel:

def __init__(self, filename):
        match = WHEEL_NAME(os.path.basename(filename))
        if match is None:
            raise ValueError('invalid wheel name: %r' % filename)
        self.filename = filename
        for k, v in match.groupdict().items():
            setattr(self, k, v)

def tags(self):
        '''List tags (py_version, abi, platform) supported by this wheel.'''
        return itertools.product(
            self.py_version.split('.'),
            self.abi.split('.'),
            self.platform.split('.'),
        )

def is_compatible(self):
        '''Is the wheel is compatible with the current platform?'''
        supported_tags = pep425tags.get_supported()
        return next((True for t in self.tags() if t in supported_tags), False)

def egg_name(self):
        return pkg_resources.Distribution(
            project_name=self.project_name, version=self.version,
            platform=(None if self.platform == 'any' else get_platform()),
        ).egg_name() + '.egg'

def get_dist_info(self, zf):
        # find the correct name of the .dist-info dir in the wheel file
        for member in zf.namelist():
            dirname = posixpath.dirname(member)
            if (dirname.endswith('.dist-info') and
                    canonicalize_name(dirname).startswith(
                        canonicalize_name(self.project_name))):
                return dirname
        raise ValueError("unsupported wheel format. .dist-info not found")

def install_as_egg(self, destination_eggdir):
        '''Install wheel as an egg directory.'''
        with zipfile.ZipFile(self.filename) as zf:
            self._install_as_egg(destination_eggdir, zf)

def _install_as_egg(self, destination_eggdir, zf):
        dist_basename = '%s-%s' % (self.project_name, self.version)
        dist_info = self.get_dist_info(zf)
        dist_data = '%s.data' % dist_basename
        egg_info = os.path.join(destination_eggdir, 'EGG-INFO')

self._convert_metadata(zf, destination_eggdir, dist_info, egg_info)
        self._move_data_entries(destination_eggdir, dist_data)
        self._fix_namespace_packages(egg_info, destination_eggdir)

@staticmethod
    def _convert_metadata(zf, destination_eggdir, dist_info, egg_info):
        def get_metadata(name):
            with zf.open(posixpath.join(dist_info, name)) as fp:
                value = fp.read().decode('utf-8') if PY3 else fp.read()
                return email.parser.Parser().parsestr(value)

wheel_metadata = get_metadata('WHEEL')
        # Check wheel format version is supported.
        wheel_version = parse_version(wheel_metadata.get('Wheel-Version'))
        wheel_v1 = (
            parse_version('1.0') <= wheel_version < parse_version('2.0dev0')
        )
        if not wheel_v1:
            raise ValueError(
                'unsupported wheel format version: %s' % wheel_version)
        # Extract to target directory.
        os.mkdir(destination_eggdir)
        zf.extractall(destination_eggdir)
        # Convert metadata.
        dist_info = os.path.join(destination_eggdir, dist_info)
        dist = pkg_resources.Distribution.from_location(
            destination_eggdir, dist_info,
            metadata=pkg_resources.PathMetadata(destination_eggdir, dist_info),
        )

# Note: Evaluate and strip markers now,
        # as it's difficult to convert back from the syntax:
        # foobar; "linux" in sys_platform and extra == 'test'
        def raw_req(req):
            req.marker = None
            return str(req)
        install_requires = list(sorted(map(raw_req, dist.requires())))
        extras_require = {
            extra: sorted(
                req
                for req in map(raw_req, dist.requires((extra,)))
                if req not in install_requires
            )
            for extra in dist.extras
        }
        os.rename(dist_info, egg_info)
        os.rename(
            os.path.join(egg_info, 'METADATA'),
            os.path.join(egg_info, 'PKG-INFO'),
        )
        setup_dist = setuptools.Distribution(
            attrs=dict(
                install_requires=install_requires,
                extras_require=extras_require,
            ),
        )
        write_requirements(
            setup_dist.get_command_obj('egg_info'),
            None,
            os.path.join(egg_info, 'requires.txt'),
        )

@staticmethod
    def _move_data_entries(destination_eggdir, dist_data):
        """Move data entries to their correct location."""
        dist_data = os.path.join(destination_eggdir, dist_data)
        dist_data_scripts = os.path.join(dist_data, 'scripts')
        if os.path.exists(dist_data_scripts):
            egg_info_scripts = os.path.join(
                destination_eggdir, 'EGG-INFO', 'scripts')
            os.mkdir(egg_info_scripts)
            for entry in os.listdir(dist_data_scripts):
                # Remove bytecode, as it's not properly handled
                # during easy_install scripts install phase.
                if entry.endswith('.pyc'):
                    os.unlink(os.path.join(dist_data_scripts, entry))
                else:
                    os.rename(
                        os.path.join(dist_data_scripts, entry),
                        os.path.join(egg_info_scripts, entry),
                    )
            os.rmdir(dist_data_scripts)
        for subdir in filter(os.path.exists, (
            os.path.join(dist_data, d)
            for d in ('data', 'headers', 'purelib', 'platlib')
        )):
            unpack(subdir, destination_eggdir)
        if os.path.exists(dist_data):
            os.rmdir(dist_data)

@staticmethod
    def _fix_namespace_packages(egg_info, destination_eggdir):
        namespace_packages = os.path.join(
            egg_info, 'namespace_packages.txt')
        if os.path.exists(namespace_packages):
            with open(namespace_packages) as fp:
                namespace_packages = fp.read().split()
            for mod in namespace_packages:
                mod_dir = os.path.join(destination_eggdir, *mod.split('.'))
                mod_init = os.path.join(mod_dir, '__init__.py')
                if os.path.exists(mod_dir) and not os.path.exists(mod_init):
                    with open(mod_init, 'w') as fp:
                        fp.write(NAMESPACE_PACKAGE_INIT)

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