Archived
225 lines
8.3 KiB
Python
225 lines
8.3 KiB
Python
"""Wheels support."""
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from distutils.util import get_platform
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from distutils import log
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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 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.extern.six import PY3
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from setuptools.command.egg_info import write_requirements
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__metaclass__ = type
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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,
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).match
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NAMESPACE_PACKAGE_INIT = """\
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try:
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__import__('pkg_resources').declare_namespace(__name__)
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except ImportError:
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__path__ = __import__('pkgutil').extend_path(__path__, __name__)
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"""
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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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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((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 (
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pkg_resources.Distribution(
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project_name=self.project_name,
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version=self.version,
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platform=(None if self.platform == "any" else get_platform()),
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).egg_name()
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+ ".egg"
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)
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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 canonicalize_name(dirname).startswith(
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canonicalize_name(self.project_name)
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):
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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") if PY3 else fp.read()
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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 = parse_version("1.0") <= wheel_version < parse_version("2.0dev0")
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if not wheel_v1:
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raise ValueError("unsupported wheel format version: %s" % wheel_version)
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# Extract to target directory.
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os.mkdir(destination_eggdir)
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zf.extractall(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,
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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(sorted(map(raw_req, dist.requires())))
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extras_require = {
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extra: sorted(
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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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# Temporarily disable info traces.
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log_threshold = log._global_log.threshold
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log.set_threshold(log.WARN)
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try:
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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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finally:
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log.set_threshold(log_threshold)
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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(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(
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os.path.exists,
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(
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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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):
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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(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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