Python sys.executable() Examples

def process_train_task(task):
    (dataset_path, models_dir, config) = task
    config_str = serialize_config(config)
    model_path = os.path.join(models_dir, 'model.{}.pkz'.format(config_str))
    env = os.environ.copy()
    env['TREECAT_PROFILE'] = '1'
    env['TREECAT_THREADS'] = '1'
    check_call_env([
        sys.executable,
        '-O',
        '-m',
        'treecat.validate',
        'train_task',
        dataset_path,
        model_path,
        config_str,
    ], env) 

def get_command_line():
        '''
        Returns prefix of command line used for spawning a child process
        '''
        if process.current_process()._identity==() and is_forking(sys.argv):
            raise RuntimeError('''
            Attempt to start a new process before the current process
            has finished its bootstrapping phase.

            This probably means that you are on Windows and you have
            forgotten to use the proper idiom in the main module:

                if __name__ == '__main__':
                    freeze_support()
                    ...

            The "freeze_support()" line can be omitted if the program
            is not going to be frozen to produce a Windows executable.''')

        if getattr(sys, 'frozen', False):
            return [sys.executable, '--multiprocessing-fork']
        else:
            prog = 'from multiprocessing.forking import main; main()'
            return [_python_exe, '-c', prog, '--multiprocessing-fork'] 

def _findLib_ldconfig(name):
            # XXX assuming GLIBC's ldconfig (with option -p)
            expr = r'/[^\(\)\s]*lib%s\.[^\(\)\s]*' % re.escape(name)
            f = os.popen('LC_ALL=C LANG=C /sbin/ldconfig -p 2>/dev/null')
            try:
                data = f.read()
            finally:
                f.close()
            res = re.search(expr, data)
            if not res:
                # Hm, this works only for libs needed by the python executable.
                cmd = 'ldd %s 2>/dev/null' % sys.executable
                f = os.popen(cmd)
                try:
                    data = f.read()
                finally:
                    f.close()
                res = re.search(expr, data)
                if not res:
                    return None
            return res.group(0) 

def filemetadata(filename):
    # type: (str) -> Optional[FileMeta]
    p_filename = which(filename)
    if p_filename is None:
        return None
    filename = p_filename
    s = os.stat(filename)
    if filename != sys.executable:
        result = run_executable(filename, ['--version'])
        versionstring = result.stdout
    else:
        # filename is the Python interpreter itself
        versionstring = bytestr(sys.version)
    return FileMeta(filename, s.st_size, s.st_mtime, filesha(filename), versionstring)

# ---------------------------------------------------------------------- 

def run_setup_commands(project, logger, commands) :
    reports_dir = project.expand_path("$dir_reports/distutils")
    if not os.path.exists(reports_dir) :
        os.mkdir(reports_dir)

    setup_script = project.expand_path("$dir_dist/setup.py")

    for command in commands :
        logger.debug("Executing distutils command %s", command)

        output_file_path = os.path.join(reports_dir, command.replace("/", ""))

        with open(output_file_path, "w") as output_file :
            commandexec = [sys.executable, setup_script]
            commandexec.extend(command.split())
            working_dir = project.expand_path("$dir_dist")
            process     = subprocess.Popen(commandexec, cwd=working_dir, stdout=output_file, stderr=output_file, shell=False)
            return_code = process.wait()
            if return_code != 0 :
                raise BuildFailedException("Error while executing setup command %s, see %s for details" % (command, output_file_path)) 

def make_virtualenv(args):
    with cleanup_dir(tempfile.mkdtemp()) as tempdir:
        venv, python, pip = dirs(tempdir)
        print_call(
            sys.executable, '-m', 'virtualenv', venv,
            '-p', args.python, '--never-download',
        )

        def pip_install(*argv):
            print_call(pip, 'install', '-i', args.index_url, *argv)

        # Latest pip installs python3.5 wheels
        pip_install('pip', 'setuptools', '--upgrade')
        pip_install('-r', 'requirements-minimal.txt')
        pip_install('-r', 'requirements-dev-minimal.txt')

        reexec(
            python, __file__.rstrip('c'),
            '--tempdir', tempdir,
            # Pass along existing args
            '--index-url', args.index_url,
            '--exec-count', str(args.exec_count),
            '--exec-limit', str(args.exec_limit),
            reason='to use the virtualenv python',
        ) 

def test_exit_crash():
    # For each Widget subclass, run a simple python script that creates an
    # instance and then shuts down. The intent is to check for segmentation
    # faults when each script exits.
    tmp = tempfile.mktemp(".py")
    path = os.path.dirname(pg.__file__)

    initArgs = {
        'CheckTable': "[]",
        'ProgressDialog': '"msg"',
        'VerticalLabel': '"msg"',
    }

    for name in dir(pg):
        obj = getattr(pg, name)
        if not isinstance(obj, type) or not issubclass(obj, pg.QtGui.QWidget):
            continue

        print(name)
        argstr = initArgs.get(name, "")
        open(tmp, 'w').write(code.format(path=path, classname=name, args=argstr))
        proc = subprocess.Popen([sys.executable, tmp])
        assert proc.wait() == 0

    os.remove(tmp) 

def test_exit_crash():
    # For each Widget subclass, run a simple python script that creates an
    # instance and then shuts down. The intent is to check for segmentation
    # faults when each script exits.
    tmp = tempfile.mktemp(".py")
    path = os.path.dirname(pg.__file__)

    initArgs = {
        'CheckTable': "[]",
        'ProgressDialog': '"msg"',
        'VerticalLabel': '"msg"',
    }

    for name in dir(pg):
        obj = getattr(pg, name)
        if not isinstance(obj, type) or not issubclass(obj, pg.QtGui.QWidget):
            continue

        print(name)
        argstr = initArgs.get(name, "")
        open(tmp, 'w').write(code.format(path=path, classname=name, args=argstr))
        proc = subprocess.Popen([sys.executable, tmp])
        assert proc.wait() == 0

    os.remove(tmp) 

def test_colors(tmpdir):
    """Test colors.

    :param tmpdir: pytest fixture.
    """
    script = dedent("""\
    import logging
    from sphinxcontrib.versioning.setup_logging import setup_logging

    setup_logging(verbose=False, colors=True)
    logger = logging.getLogger("{logger}")
    logger.critical("Critical")
    logger.error("Error")
    logger.warning("Warning")
    logger.info("Info")
    logger.debug("Debug")  # Not printed since verbose = False.
    """).format(logger=ColorFormatter.SPECIAL_SCOPE + '.sample')
    tmpdir.join('script.py').write(script)

    output = pytest.run(tmpdir, [sys.executable, 'script.py'])
    assert '\033[31m=> Critical\033[39m\n' in output
    assert '\033[31m=> Error\033[39m\n' in output
    assert '\033[33m=> Warning\033[39m\n' in output
    assert '\033[36m=> Info\033[39m' in output
    assert 'Debug' not in output 

def fix_script(path):
    """Replace #!python with #!/path/to/python
    Return True if file was changed."""
    # XXX RECORD hashes will need to be updated
    if os.path.isfile(path):
        script = open(path, 'rb')
        try:
            firstline = script.readline()
            if not firstline.startswith(binary('#!python')):
                return False
            exename = sys.executable.encode(sys.getfilesystemencoding())
            firstline = binary('#!') + exename + binary(os.linesep)
            rest = script.read()
        finally:
            script.close()
        script = open(path, 'wb')
        try:
            script.write(firstline)
            script.write(rest)
        finally:
            script.close()
        return True 

def _build_one(self, req):
        """Build one wheel."""

        base_args = [
            sys.executable, '-c',
            "import setuptools;__file__=%r;"\
            "exec(compile(open(__file__).read().replace('\\r\\n', '\\n'), __file__, 'exec'))" % req.setup_py] + \
            list(self.global_options)

        logger.notify('Running setup.py bdist_wheel for %s' % req.name)
        logger.notify('Destination directory: %s' % self.wheel_dir)
        wheel_args = base_args + ['bdist_wheel', '-d', self.wheel_dir] + self.build_options
        try:
            call_subprocess(wheel_args, cwd=req.source_dir, show_stdout=False)
            return True
        except:
            logger.error('Failed building wheel for %s' % req.name)
            return False 

def restart_with_reloader(self):
        """Spawn a new Python interpreter with the same arguments as this one,
        but running the reloader thread.
        """
        while 1:
            _log('info', ' * Restarting with %s' % self.name)
            args = [sys.executable] + sys.argv
            new_environ = os.environ.copy()
            new_environ['WERKZEUG_RUN_MAIN'] = 'true'

            # a weird bug on windows. sometimes unicode strings end up in the
            # environment and subprocess.call does not like this, encode them
            # to latin1 and continue.
            if os.name == 'nt' and PY2:
                for key, value in iteritems(new_environ):
                    if isinstance(value, text_type):
                        new_environ[key] = value.encode('iso-8859-1')

            exit_code = subprocess.call(args, env=new_environ,
                                        close_fds=False)
            if exit_code != 3:
                return exit_code 

def fix_jython_executable(executable, options):
    if sys.platform.startswith('java') and is_sh(executable):
        # Workaround for Jython is not needed on Linux systems.
        import java
        if java.lang.System.getProperty("os.name") == "Linux":
            return executable

        # Workaround Jython's sys.executable being a .sh (an invalid
        # shebang line interpreter)
        if options:
            # Can't apply the workaround, leave it broken
            log.warn(
                "WARNING: Unable to adapt shebang line for Jython,"
                " the following script is NOT executable\n"
                "         see http://bugs.jython.org/issue1112 for"
                " more information.")
        else:
            return '/usr/bin/env %s' % executable
    return executable 

def _install_build_reqs(self, reqs, prefix):
        # Local import to avoid circular import (wheel <-> req_install)
        from pip._internal.req.req_install import InstallRequirement
        from pip._internal.index import FormatControl
        # Ignore the --no-binary option when installing the build system, so
        # we don't recurse trying to build a self-hosting build system.
        finder = copy.copy(self.finder)
        finder.format_control = FormatControl(set(), set())
        urls = [finder.find_requirement(InstallRequirement.from_line(r),
                                        upgrade=False).url
                for r in reqs]

        args = [sys.executable, '-m', 'pip', 'install', '--ignore-installed',
                '--prefix', prefix] + list(urls)
        with open_spinner("Installing build dependencies") as spinner:
            call_subprocess(args, show_stdout=False, spinner=spinner) 

def get_install_args(self, global_options, record_filename, root, prefix):
        install_args = [sys.executable, "-u"]
        install_args.append('-c')
        install_args.append(SETUPTOOLS_SHIM % self.setup_py)
        install_args += list(global_options) + \
            ['install', '--record', record_filename]
        install_args += ['--single-version-externally-managed']

        if root is not None:
            install_args += ['--root', root]
        if prefix is not None:
            install_args += ['--prefix', prefix]

        if self.pycompile:
            install_args += ["--compile"]
        else:
            install_args += ["--no-compile"]

        if running_under_virtualenv():
            py_ver_str = 'python' + sysconfig.get_python_version()
            install_args += ['--install-headers',
                             os.path.join(sys.prefix, 'include', 'site',
                                          py_ver_str, self.name)]

        return install_args 

def pyrun(src):
        """Run python code 'src' in a separate interpreter.
        Return subprocess exit code.
        """
        if PY3:
            src = bytes(src, 'ascii')
        with tempfile.NamedTemporaryFile(suffix='.py', delete=False) as f:
            f.write(src)
            f.flush()
            test_files.append(f.name)
            code = subprocess.call(
                [sys.executable, f.name],
                stdout=None, stderr=None,
                # creationflags=subprocess.CREATE_NEW_PROCESS_GROUP
            )
        return code 

def run_as_admin(extra_args=None):
    """If required, rerun the script and request admin privileges.
    
    :params iterable extra_args:
        Additional arguments to pass to the script in case it has to be
        restarted.
    """
    if not am_admin():
        try:
            print('Restarting and requesting admin privileges.')
            args = sys.argv
            if extra_args:
                args = args + extra_args
            exe, args = sys.executable, ' '.join(args)
            if sys.version_info[0] == 2:
                exe = _decode(exe)
            ctypes.windll.shell32.ShellExecuteW(None, 'Runas', exe, args, None, 1)
            sys.exit()
        except Exception as e:
            print(e)
            msg = ('Unable to elevate privileges. You need to rerun the script'
                   ' with Administrator privileges yourself. E.g. try pressing'
                   ' the Windows key + x, then select "Command Prompt (Admin)"'
                   ' and run the script in that console.')
            sys.exit(msg) 

def testOutputStreams(self):
        output_spec = {
            'mode': 'http',
            'method': 'PUT',
            'url': 'http://localhost:%d' % _socket_port
        }

        fd = os.open(_pipepath, os.O_RDONLY | os.O_NONBLOCK)
        adapters = {
            fd: make_stream_push_adapter(output_spec)
        }
        cmd = [sys.executable, _oscript, _pipepath]

        try:
            with captureOutput() as stdpipes:
                run_process(cmd, adapters)
        except Exception:
            print('Stdout/stderr from exception: ')
            print(stdpipes)
            raise
        self.assertEqual(stdpipes, ['start\ndone\n', ''])
        self.assertEqual(len(_req_chunks), 1)
        self.assertEqual(_req_chunks[0], (9, 'a message')) 

def testInputStreams(self):
        input_spec = {
            'mode': 'http',
            'method': 'GET',
            'url': 'http://mockedhost'
        }

        @httmock.urlmatch(netloc='^mockedhost$', method='GET')
        def mock_fetch(url, request):
            return 'hello\nworld'

        adapters = {
            _pipepath: make_stream_fetch_adapter(input_spec)
        }
        cmd = [sys.executable, _iscript, _pipepath]

        try:
            with captureOutput() as stdpipes, httmock.HTTMock(mock_fetch):
                run_process(cmd, input_pipes=adapters)
        except Exception:
            print('Stdout/stderr from exception: ')
            print(stdpipes)
            raise
        self.assertEqual(stdpipes, ['olleh\ndlrow\n', '']) 

def configure(conf):
	"""
	Detect the python interpreter
	"""
	v = conf.env
	v['PYTHON'] = Options.options.python or os.environ.get('PYTHON', sys.executable)
	if Options.options.pythondir:
		v['PYTHONDIR'] = Options.options.pythondir
	if Options.options.pythonarchdir:
		v['PYTHONARCHDIR'] = Options.options.pythonarchdir

	conf.find_program('python', var='PYTHON')

	v['PYFLAGS'] = ''
	v['PYFLAGS_OPT'] = '-O'

	v['PYC'] = getattr(Options.options, 'pyc', 1)
	v['PYO'] = getattr(Options.options, 'pyo', 1)

	try:
		v.PYTAG = conf.cmd_and_log(conf.env.PYTHON + ['-c', "import imp;print(imp.get_tag())"]).strip()
	except Errors.WafError:
		pass 

def configure(conf):
	"""
	Detect the python interpreter
	"""
	v = conf.env
	v['PYTHON'] = Options.options.python or os.environ.get('PYTHON', sys.executable)
	if Options.options.pythondir:
		v['PYTHONDIR'] = Options.options.pythondir
	if Options.options.pythonarchdir:
		v['PYTHONARCHDIR'] = Options.options.pythonarchdir

	conf.find_program('python', var='PYTHON')

	v['PYFLAGS'] = ''
	v['PYFLAGS_OPT'] = '-O'

	v['PYC'] = getattr(Options.options, 'pyc', 1)
	v['PYO'] = getattr(Options.options, 'pyo', 1)

	try:
		v.PYTAG = conf.cmd_and_log(conf.env.PYTHON + ['-c', "import imp;print(imp.get_tag())"]).strip()
	except Errors.WafError:
		pass 

def configure(conf):
	"""
	Detect the python interpreter
	"""
	v = conf.env
	v['PYTHON'] = Options.options.python or os.environ.get('PYTHON', sys.executable)
	if Options.options.pythondir:
		v['PYTHONDIR'] = Options.options.pythondir
	if Options.options.pythonarchdir:
		v['PYTHONARCHDIR'] = Options.options.pythonarchdir

	conf.find_program('python', var='PYTHON')

	v['PYFLAGS'] = ''
	v['PYFLAGS_OPT'] = '-O'

	v['PYC'] = getattr(Options.options, 'pyc', 1)
	v['PYO'] = getattr(Options.options, 'pyo', 1)

	try:
		v.PYTAG = conf.cmd_and_log(conf.env.PYTHON + ['-c', "import imp;print(imp.get_tag())"]).strip()
	except Errors.WafError:
		pass 

def __init__(self, qt_toolkit='pyside'):
        """
        :param qt_toolkit: Toolkit used to generate files: ``'pyside'`` or ``'pyqt'``
        """
        if qt_toolkit.lower() == 'pyside':
            if sys.platform.startswith('win'):
                PYPATH =  os.path.dirname(sys.executable)
                PYSIDEPATH = os.path.join(get_python_lib(), 'PySide')
                self.PYUIC = os.path.join(PYPATH, "Scripts/pyside-uic")
                self.PYRCC = os.path.join(PYSIDEPATH, "pyside-rcc")
            else:
                self.PYUIC = "pyside-uic"
                self.PYRCC = "pyside-rcc"
        else:  # pyqt
            if sys.platform.startswith('win'):
                PYQTPATH = os.path.join(get_python_lib(), 'PyQt4')
                self.PYUIC = os.path.join(PYQTPATH, "pyuic4")
                self.PYRCC = os.path.join(PYQTPATH, "pyrcc4.exe")
            else:
                self.PYUIC = "pyuic4"
                self.PYRCC = "pyrcc4" 

def restart_with_reloader(self):
        """Spawn a new Python interpreter with the same arguments as this one,
        but running the reloader thread.
        """
        while 1:
            _log('info', ' * Restarting with %s' % self.name)
            args = [sys.executable] + sys.argv
            new_environ = os.environ.copy()
            new_environ['WERKZEUG_RUN_MAIN'] = 'true'

            # a weird bug on windows. sometimes unicode strings end up in the
            # environment and subprocess.call does not like this, encode them
            # to latin1 and continue.
            if os.name == 'nt' and PY2:
                for key, value in iteritems(new_environ):
                    if isinstance(value, text_type):
                        new_environ[key] = value.encode('iso-8859-1')

            exit_code = subprocess.call(args, env=new_environ,
                                        close_fds=False)
            if exit_code != 3:
                return exit_code 

def _python_cmd(*args):
    """
    Return True if the command succeeded.
    """
    args = (sys.executable,) + args
    return subprocess.call(args) == 0 

def check(request):
    return {
            'version': '{major}.{minor}.{micro}'.format(
                major=sys.version_info.major,
                minor=sys.version_info.minor,
                micro=sys.version_info.micro
            ),
            'info': sys.version,
            'executable': sys.executable,
            'platform': sys.platform
        } 

def _init_non_posix(vars):
    """Initialize the module as appropriate for NT"""
    # set basic install directories
    vars['LIBDEST'] = get_path('stdlib')
    vars['BINLIBDEST'] = get_path('platstdlib')
    vars['INCLUDEPY'] = get_path('include')
    vars['SO'] = '.pyd'
    vars['EXE'] = '.exe'
    vars['VERSION'] = _PY_VERSION_SHORT_NO_DOT
    vars['BINDIR'] = os.path.dirname(_safe_realpath(sys.executable))

#
# public APIs
# 

def get_executable():
# The __PYVENV_LAUNCHER__ dance is apparently no longer needed, as
# changes to the stub launcher mean that sys.executable always points
# to the stub on macOS
#    if sys.platform == 'darwin' and ('__PYVENV_LAUNCHER__'
#                                     in os.environ):
#        result =  os.environ['__PYVENV_LAUNCHER__']
#    else:
#        result = sys.executable
#    return result
    result = os.path.normcase(sys.executable)
    if not isinstance(result, text_type):
        result = fsdecode(result)
    return result 

def _copy_dist_from_dir(link_path, location):
    """Copy distribution files in `link_path` to `location`.

    Invoked when user requests to install a local directory. E.g.:

        pip install .
        pip install ~/dev/git-repos/python-prompt-toolkit

    """

    # Note: This is currently VERY SLOW if you have a lot of data in the
    # directory, because it copies everything with `shutil.copytree`.
    # What it should really do is build an sdist and install that.
    # See https://github.com/pypa/pip/issues/2195

    if os.path.isdir(location):
        rmtree(location)

    # build an sdist
    setup_py = 'setup.py'
    sdist_args = [sys.executable]
    sdist_args.append('-c')
    sdist_args.append(SETUPTOOLS_SHIM % setup_py)
    sdist_args.append('sdist')
    sdist_args += ['--dist-dir', location]
    logger.info('Running setup.py sdist for %s', link_path)

    with indent_log():
        call_subprocess(sdist_args, cwd=link_path, show_stdout=False)

    # unpack sdist into `location`
    sdist = os.path.join(location, os.listdir(location)[0])
    logger.info('Unpacking sdist %s into %s', sdist, location)
    unpack_file(sdist, location, content_type=None, link=None) 

def get_prog():
    try:
        if os.path.basename(sys.argv[0]) in ('__main__.py', '-c'):
            return "%s -m pip" % sys.executable
    except (AttributeError, TypeError, IndexError):
        pass
    return 'pip'


# Retry every half second for up to 3 seconds 

def _base_setup_args(self, req):
        return [
            sys.executable, "-u", '-c',
            SETUPTOOLS_SHIM % req.setup_py
        ] + list(self.global_options) 

def get_install_args(self, global_options, record_filename, root, prefix):
        install_args = [sys.executable, "-u"]
        install_args.append('-c')
        install_args.append(SETUPTOOLS_SHIM % self.setup_py)
        install_args += list(global_options) + \
            ['install', '--record', record_filename]

        if not self.as_egg:
            install_args += ['--single-version-externally-managed']

        if root is not None:
            install_args += ['--root', root]
        if prefix is not None:
            install_args += ['--prefix', prefix]

        if self.pycompile:
            install_args += ["--compile"]
        else:
            install_args += ["--no-compile"]

        if running_under_virtualenv():
            py_ver_str = 'python' + sysconfig.get_python_version()
            install_args += ['--install-headers',
                             os.path.join(sys.prefix, 'include', 'site',
                                          py_ver_str, self.name)]

        return install_args 

def install_editable(self, install_options,
                         global_options=(), prefix=None):
        logger.info('Running setup.py develop for %s', self.name)

        if self.isolated:
            global_options = list(global_options) + ["--no-user-cfg"]

        if prefix:
            prefix_param = ['--prefix={0}'.format(prefix)]
            install_options = list(install_options) + prefix_param

        with indent_log():
            # FIXME: should we do --install-headers here too?
            call_subprocess(
                [
                    sys.executable,
                    '-c',
                    SETUPTOOLS_SHIM % self.setup_py
                ] +
                list(global_options) +
                ['develop', '--no-deps'] +
                list(install_options),

                cwd=self.setup_py_dir,
                show_stdout=False)

        self.install_succeeded = True 

def test_default_tag(temp_pkg):
    subprocess.check_call([sys.executable, 'setup.py', 'bdist_wheel'],
            cwd=str(temp_pkg))
    dist_dir = temp_pkg.join('dist')
    assert dist_dir.check(dir=1)
    wheels = dist_dir.listdir()
    assert len(wheels) == 1
    assert wheels[0].basename == 'Test-1.0-py%s-none-any.whl' % (sys.version[0],)
    assert wheels[0].ext == '.whl' 

def test_universal_tag(temp_pkg):
    subprocess.check_call(
        [sys.executable, 'setup.py', 'bdist_wheel', '--universal'],
        cwd=str(temp_pkg))
    dist_dir = temp_pkg.join('dist')
    assert dist_dir.check(dir=1)
    wheels = dist_dir.listdir()
    assert len(wheels) == 1
    assert wheels[0].basename.startswith('Test-1.0-py2.py3-')
    assert wheels[0].ext == '.whl' 

def test_universal_beats_explicit_tag(temp_pkg):
    subprocess.check_call(
        [sys.executable, 'setup.py', 'bdist_wheel', '--universal', '--python-tag=py32'],
        cwd=str(temp_pkg))
    dist_dir = temp_pkg.join('dist')
    assert dist_dir.check(dir=1)
    wheels = dist_dir.listdir()
    assert len(wheels) == 1
    assert wheels[0].basename.startswith('Test-1.0-py2.py3-')
    assert wheels[0].ext == '.whl' 

def test_universal_in_setup_cfg(temp_pkg):
    temp_pkg.join('setup.cfg').write('[bdist_wheel]\nuniversal=1')
    subprocess.check_call(
        [sys.executable, 'setup.py', 'bdist_wheel'],
        cwd=str(temp_pkg))
    dist_dir = temp_pkg.join('dist')
    assert dist_dir.check(dir=1)
    wheels = dist_dir.listdir()
    assert len(wheels) == 1
    assert wheels[0].basename.startswith('Test-1.0-py2.py3-')
    assert wheels[0].ext == '.whl' 

def test_pythontag_in_setup_cfg(temp_pkg):
    temp_pkg.join('setup.cfg').write('[bdist_wheel]\npython_tag=py32')
    subprocess.check_call(
        [sys.executable, 'setup.py', 'bdist_wheel'],
        cwd=str(temp_pkg))
    dist_dir = temp_pkg.join('dist')
    assert dist_dir.check(dir=1)
    wheels = dist_dir.listdir()
    assert len(wheels) == 1
    assert wheels[0].basename.startswith('Test-1.0-py32-')
    assert wheels[0].ext == '.whl' 

def test_legacy_wheel_section_in_setup_cfg(temp_pkg):
    temp_pkg.join('setup.cfg').write('[wheel]\nuniversal=1')
    subprocess.check_call(
        [sys.executable, 'setup.py', 'bdist_wheel'],
        cwd=str(temp_pkg))
    dist_dir = temp_pkg.join('dist')
    assert dist_dir.check(dir=1)
    wheels = dist_dir.listdir()
    assert len(wheels) == 1
    assert wheels[0].basename.startswith('Test-1.0-py2.py3-')
    assert wheels[0].ext == '.whl' 

def test_plat_name_ext(temp_ext_pkg):
    try:
        subprocess.check_call(
            [sys.executable, 'setup.py', 'bdist_wheel', '--plat-name=testplat.arch'],
            cwd=str(temp_ext_pkg))
    except subprocess.CalledProcessError:
        pytest.skip("Cannot compile C Extensions")
    dist_dir = temp_ext_pkg.join('dist')
    assert dist_dir.check(dir=1)
    wheels = dist_dir.listdir()
    assert len(wheels) == 1
    assert wheels[0].basename.endswith('-testplat_arch.whl')
    assert wheels[0].ext == '.whl' 

def test_plat_name_purepy_in_setupcfg(temp_pkg):
    temp_pkg.join('setup.cfg').write('[bdist_wheel]\nplat_name=testplat.pure')
    subprocess.check_call(
        [sys.executable, 'setup.py', 'bdist_wheel'],
        cwd=str(temp_pkg))
    dist_dir = temp_pkg.join('dist')
    assert dist_dir.check(dir=1)
    wheels = dist_dir.listdir()
    assert len(wheels) == 1
    assert wheels[0].basename.endswith('-testplat_pure.whl')
    assert wheels[0].ext == '.whl' 

def test_plat_name_ext_in_setupcfg(temp_ext_pkg):
    temp_ext_pkg.join('setup.cfg').write('[bdist_wheel]\nplat_name=testplat.arch')
    try:
        subprocess.check_call(
            [sys.executable, 'setup.py', 'bdist_wheel'],
            cwd=str(temp_ext_pkg))
    except subprocess.CalledProcessError:
        pytest.skip("Cannot compile C Extensions")
    dist_dir = temp_ext_pkg.join('dist')
    assert dist_dir.check(dir=1)
    wheels = dist_dir.listdir()
    assert len(wheels) == 1
    assert wheels[0].basename.endswith('-testplat_arch.whl')
    assert wheels[0].ext == '.whl' 

def run(self):
        import setuptools.command.easy_install as ei

        self.run_command("egg_info")
        if self.distribution.scripts:
            orig.install_scripts.run(self)  # run first to set up self.outfiles
        else:
            self.outfiles = []
        if self.no_ep:
            # don't install entry point scripts into .egg file!
            return

        ei_cmd = self.get_finalized_command("egg_info")
        dist = Distribution(
            ei_cmd.egg_base, PathMetadata(ei_cmd.egg_base, ei_cmd.egg_info),
            ei_cmd.egg_name, ei_cmd.egg_version,
        )
        bs_cmd = self.get_finalized_command('build_scripts')
        exec_param = getattr(bs_cmd, 'executable', None)
        bw_cmd = self.get_finalized_command("bdist_wininst")
        is_wininst = getattr(bw_cmd, '_is_running', False)
        writer = ei.ScriptWriter
        if is_wininst:
            exec_param = "python.exe"
            writer = ei.WindowsScriptWriter
        if exec_param == sys.executable:
            # In case the path to the Python executable contains a space, wrap
            # it so it's not split up.
            exec_param = [exec_param]
        # resolve the writer to the environment
        writer = writer.best()
        cmd = writer.command_spec_class.best().from_param(exec_param)
        for args in writer.get_args(dist, cmd.as_header()):
            self.write_script(*args) 

def write_script(self, script_name, contents, mode="t", blockers=()):
        """Write an executable file to the scripts directory"""
        self.delete_blockers(  # clean up old .py/.pyw w/o a script
            [os.path.join(self.script_dir, x) for x in blockers]
        )
        log.info("Installing %s script to %s", script_name, self.script_dir)
        target = os.path.join(self.script_dir, script_name)
        self.add_output(target)

        mask = current_umask()
        if not self.dry_run:
            ensure_directory(target)
            if os.path.exists(target):
                os.unlink(target)
            with open(target, "w" + mode) as f:
                f.write(contents)
            chmod(target, 0o777 - mask) 

def report_editable(self, spec, setup_script):
        dirname = os.path.dirname(setup_script)
        python = sys.executable
        return '\n' + self.__editable_msg % locals() 

def is_sh(executable):
    """Determine if the specified executable is a .sh (contains a #! line)"""
    try:
        with io.open(executable, encoding='latin-1') as fp:
            magic = fp.read(2)
    except (OSError, IOError):
        return executable
    return magic == '#!' 

def _sys_executable(cls):
        _default = os.path.normpath(sys.executable)
        return os.environ.get('__PYVENV_LAUNCHER__', _default) 

def get_script_args(cls, dist, executable=None, wininst=False):
        # for backward compatibility
        warnings.warn("Use get_args", DeprecationWarning)
        writer = (WindowsScriptWriter if wininst else ScriptWriter).best()
        header = cls.get_script_header("", executable, wininst)
        return writer.get_args(dist, header) 

def get_header(cls, script_text="", executable=None):
        """Create a #! line, getting options (if any) from script_text"""
        cmd = cls.command_spec_class.best().from_param(executable)
        cmd.install_options(script_text)
        return cmd.as_header() 

def best(cls):
        """
        Select the best ScriptWriter suitable for Windows
        """
        writer_lookup = dict(
            executable=WindowsExecutableLauncherWriter,
            natural=cls,
        )
        # for compatibility, use the executable launcher by default
        launcher = os.environ.get('SETUPTOOLS_LAUNCHER', 'executable')
        return writer_lookup[launcher]