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"""Build Environment used for isolation during sdist building
"""

import logging
import os
import sys
import textwrap
from collections import OrderedDict
from distutils.sysconfig import get_python_lib
from sysconfig import get_paths

from pip._vendor.pkg_resources import Requirement, VersionConflict, WorkingSet

from pip import __file__ as pip_location
from pip._internal.cli.spinners import open_spinner
from pip._internal.utils.subprocess import call_subprocess
from pip._internal.utils.temp_dir import TempDirectory, tempdir_kinds
from pip._internal.utils.typing import MYPY_CHECK_RUNNING

if MYPY_CHECK_RUNNING:
    from types import TracebackType
    from typing import Tuple, Set, Iterable, Optional, List, Type
    from pip._internal.index.package_finder import PackageFinder

logger = logging.getLogger(__name__)


class _Prefix:

    def __init__(self, path):
        # type: (str) -> None
        self.path = path
        self.setup = False
        self.bin_dir = get_paths(
            'nt' if os.name == 'nt' else 'posix_prefix',
            vars={'base': path, 'platbase': path}
        )['scripts']
        # Note: prefer distutils' sysconfig to get the
        # library paths so PyPy is correctly supported.
        purelib = get_python_lib(plat_specific=False, prefix=path)
        platlib = get_python_lib(plat_specific=True, prefix=path)
        if purelib == platlib:
            self.lib_dirs = [purelib]
        else:
            self.lib_dirs = [purelib, platlib]


class BuildEnvironment(object):
    """Creates and manages an isolated environment to install build deps
    """

    def __init__(self):
        # type: () -> None
        temp_dir = TempDirectory(
            kind=tempdir_kinds.BUILD_ENV, globally_managed=True
        )

        self._prefixes = OrderedDict((
            (name, _Prefix(os.path.join(temp_dir.path, name)))
            for name in ('normal', 'overlay')
        ))

        self._bin_dirs = []  # type: List[str]
        self._lib_dirs = []  # type: List[str]
        for prefix in reversed(list(self._prefixes.values())):
            self._bin_dirs.append(prefix.bin_dir)
            self._lib_dirs.extend(prefix.lib_dirs)

        # Customize site to:
        # - ensure .pth files are honored
        # - prevent access to system site packages
        system_sites = {
            os.path.normcase(site) for site in (
                get_python_lib(plat_specific=False),
                get_python_lib(plat_specific=True),
            )
        }
        self._site_dir = os.path.join(temp_dir.path, 'site')
        if not os.path.exists(self._site_dir):
            os.mkdir(self._site_dir)
        with open(os.path.join(self._site_dir, 'sitecustomize.py'), 'w') as fp:
            fp.write(textwrap.dedent(
                '''
                import os, site, sys

                # First, drop system-sites related paths.
                original_sys_path = sys.path[:]
                known_paths = set()
                for path in {system_sites!r}:
                    site.addsitedir(path, known_paths=known_paths)
                system_paths = set(
                    os.path.normcase(path)
                    for path in sys.path[len(original_sys_path):]
                )
                original_sys_path = [
                    path for path in original_sys_path
                    if os.path.normcase(path) not in system_paths
                ]
                sys.path = original_sys_path

                # Second, add lib directories.
                # ensuring .pth file are processed.
                for path in {lib_dirs!r}:
                    assert not path in sys.path
                    site.addsitedir(path)
                '''
            ).format(system_sites=system_sites, lib_dirs=self._lib_dirs))

    def __enter__(self):
        # type: () -> None
        self._save_env = {
            name: os.environ.get(name, None)
            for name in ('PATH', 'PYTHONNOUSERSITE', 'PYTHONPATH')
        }

        path = self._bin_dirs[:]
        old_path = self._save_env['PATH']
        if old_path:
            path.extend(old_path.split(os.pathsep))

        pythonpath = [self._site_dir]

        os.environ.update({
            'PATH': os.pathsep.join(path),
            'PYTHONNOUSERSITE': '1',
            'PYTHONPATH': os.pathsep.join(pythonpath),
        })

    def __exit__(
        self,
        exc_type,  # type: Optional[Type[BaseException]]
        exc_val,  # type: Optional[BaseException]
        exc_tb  # type: Optional[TracebackType]
    ):
        # type: (...) -> None
        for varname, old_value in self._save_env.items():
            if old_value is None:
                os.environ.pop(varname, None)
            else:
                os.environ[varname] = old_value

    def check_requirements(self, reqs):
        # type: (Iterable[str]) -> Tuple[Set[Tuple[str, str]], Set[str]]
        """Return 2 sets:
            - conflicting requirements: set of (installed, wanted) reqs tuples
            - missing requirements: set of reqs
        """
        missing = set()
        conflicting = set()
        if reqs:
            ws = WorkingSet(self._lib_dirs)
            for req in reqs:
                try:
                    if ws.find(Requirement.parse(req)) is None:
                        missing.add(req)
                except VersionConflict as e:
                    conflicting.add((str(e.args[0].as_requirement()),
                                     str(e.args[1])))
        return conflicting, missing

    def install_requirements(
        self,
        finder,  # type: PackageFinder
        requirements,  # type: Iterable[str]
        prefix_as_string,  # type: str
        message  # type: str
    ):
        # type: (...) -> None
        prefix = self._prefixes[prefix_as_string]
        assert not prefix.setup
        prefix.setup = True
        if not requirements:
            return
        args = [
            sys.executable, os.path.dirname(pip_location), 'install',
            '--ignore-installed', '--no-user', '--prefix', prefix.path,
            '--no-warn-script-location',
        ]  # type: List[str]
        if logger.getEffectiveLevel() <= logging.DEBUG:
            args.append('-v')
        for format_control in ('no_binary', 'only_binary'):
            formats = getattr(finder.format_control, format_control)
            args.extend(('--' + format_control.replace('_', '-'),
                         ','.join(sorted(formats or {':none:'}))))

        index_urls = finder.index_urls
        if index_urls:
            args.extend(['-i', index_urls[0]])
            for extra_index in index_urls[1:]:
                args.extend(['--extra-index-url', extra_index])
        else:
            args.append('--no-index')
        for link in finder.find_links:
            args.extend(['--find-links', link])

        for host in finder.trusted_hosts:
            args.extend(['--trusted-host', host])
        if finder.allow_all_prereleases:
            args.append('--pre')
        if finder.prefer_binary:
            args.append('--prefer-binary')
        args.append('--')
        args.extend(requirements)
        with open_spinner(message) as spinner:
            call_subprocess(args, spinner=spinner)


class NoOpBuildEnvironment(BuildEnvironment):
    """A no-op drop-in replacement for BuildEnvironment
    """

    def __init__(self):
        # type: () -> None
        pass

    def __enter__(self):
        # type: () -> None
        pass

    def __exit__(
        self,
        exc_type,  # type: Optional[Type[BaseException]]
        exc_val,  # type: Optional[BaseException]
        exc_tb  # type: Optional[TracebackType]
    ):
        # type: (...) -> None
        pass

    def cleanup(self):
        # type: () -> None
        pass

    def install_requirements(
        self,
        finder,  # type: PackageFinder
        requirements,  # type: Iterable[str]
        prefix_as_string,  # type: str
        message  # type: str
    ):
        # type: (...) -> None
        raise NotImplementedError()

Filemanager

Name Type Size Permission Actions
__pycache__ Folder 2755
cli Folder 2755
commands Folder 2755
distributions Folder 2755
index Folder 2755
models Folder 2755
network Folder 2755
operations Folder 2755
req Folder 2755
resolution Folder 2755
utils Folder 2755
vcs Folder 2755
__init__.py File 495 B 0644
build_env.py File 7.9 KB 0644
cache.py File 11.96 KB 0644
configuration.py File 13.78 KB 0644
exceptions.py File 12.34 KB 0644
locations.py File 6.57 KB 0644
main.py File 437 B 0644
pyproject.py File 7.23 KB 0644
self_outdated_check.py File 6.62 KB 0644
wheel_builder.py File 9.3 KB 0644