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Current File : /usr/lib/python3/dist-packages/setuptools/tests/environment.py
import os
import zipfile
import sys
import tempfile
import unittest
import shutil
import stat
import unicodedata

from subprocess import Popen as _Popen, PIPE as _PIPE


def _extract(self, member, path=None, pwd=None):
    """for zipfile py2.5 borrowed from cpython"""
    if not isinstance(member, zipfile.ZipInfo):
        member = self.getinfo(member)

    if path is None:
        path = os.getcwd()

    return _extract_member(self, member, path, pwd)


def _extract_from_zip(self, name, dest_path):
    dest_file = open(dest_path, 'wb')
    try:
        dest_file.write(self.read(name))
    finally:
        dest_file.close()


def _extract_member(self, member, targetpath, pwd):
    """for zipfile py2.5 borrowed from cpython"""
    # build the destination pathname, replacing
    # forward slashes to platform specific separators.
    # Strip trailing path separator, unless it represents the root.
    if (targetpath[-1:] in (os.path.sep, os.path.altsep)
            and len(os.path.splitdrive(targetpath)[1]) > 1):
        targetpath = targetpath[:-1]

    # don't include leading "/" from file name if present
    if member.filename[0] == '/':
        targetpath = os.path.join(targetpath, member.filename[1:])
    else:
        targetpath = os.path.join(targetpath, member.filename)

    targetpath = os.path.normpath(targetpath)

    # Create all upper directories if necessary.
    upperdirs = os.path.dirname(targetpath)
    if upperdirs and not os.path.exists(upperdirs):
        os.makedirs(upperdirs)

    if member.filename[-1] == '/':
        if not os.path.isdir(targetpath):
            os.mkdir(targetpath)
        return targetpath

    _extract_from_zip(self, member.filename, targetpath)

    return targetpath


def _remove_dir(target):

    #on windows this seems to a problem
    for dir_path, dirs, files in os.walk(target):
        os.chmod(dir_path, stat.S_IWRITE)
        for filename in files:
            os.chmod(os.path.join(dir_path, filename), stat.S_IWRITE)
    shutil.rmtree(target)


class ZippedEnvironment(unittest.TestCase):

    datafile = None
    dataname = None
    old_cwd = None

    def setUp(self):
        if self.datafile is None or self.dataname is None:
            return

        if not os.path.isfile(self.datafile):
            self.old_cwd = None
            return

        self.old_cwd = os.getcwd()

        self.temp_dir = tempfile.mkdtemp()
        zip_file, source, target = [None, None, None]
        try:
            zip_file = zipfile.ZipFile(self.datafile)
            for files in zip_file.namelist():
                _extract(zip_file, files, self.temp_dir)
        finally:
            if zip_file:
                zip_file.close()
            del zip_file

        os.chdir(os.path.join(self.temp_dir, self.dataname))

    def tearDown(self):
        #Assume setUp was never completed
        if self.dataname is None or self.datafile is None:
            return

        try:
            if self.old_cwd:
                os.chdir(self.old_cwd)
                _remove_dir(self.temp_dir)
        except OSError:
            #sigh?
            pass


def _which_dirs(cmd):
    result = set()
    for path in os.environ.get('PATH', '').split(os.pathsep):
        filename = os.path.join(path, cmd)
        if os.access(filename, os.X_OK):
            result.add(path)
    return result


def run_setup_py(cmd, pypath=None, path=None,
                 data_stream=0, env=None):
    """
    Execution command for tests, separate from those used by the
    code directly to prevent accidental behavior issues
    """
    if env is None:
        env = dict()
        for envname in os.environ:
            env[envname] = os.environ[envname]

    #override the python path if needed
    if pypath is not None:
        env["PYTHONPATH"] = pypath

    #overide the execution path if needed
    if path is not None:
        env["PATH"] = path
    if not env.get("PATH", ""):
        env["PATH"] = _which_dirs("tar").union(_which_dirs("gzip"))
        env["PATH"] = os.pathsep.join(env["PATH"])

    cmd = [sys.executable, "setup.py"] + list(cmd)

    #regarding the shell argument, see: http://bugs.python.org/issue8557
    try:
        proc = _Popen(cmd, stdout=_PIPE, stderr=_PIPE,
                      shell=(sys.platform == 'win32'), env=env)

        data = proc.communicate()[data_stream]
    except OSError:
        return 1, ''

    #decode the console string if needed
    if hasattr(data,  "decode"):
        data = data.decode()  # should use the preffered encoding
        data = unicodedata.normalize('NFC', data)

    #communciate calls wait()
    return proc.returncode, data

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