Mr.X

"""distutils.spawn

Provides the 'spawn()' function, a front-end to various platform-
specific functions for launching another program in a sub-process.
Also provides the 'find_executable()' to search the path for a given
executable name.
"""

import sys
import os
import subprocess

from distutils.errors import DistutilsPlatformError, DistutilsExecError
from distutils.debug import DEBUG
from distutils import log


if sys.platform == 'darwin':
    _cfg_target = None
    _cfg_target_split = None


def spawn(cmd, search_path=1, verbose=0, dry_run=0):
    """Run another program, specified as a command list 'cmd', in a new process.

    'cmd' is just the argument list for the new process, ie.
    cmd[0] is the program to run and cmd[1:] are the rest of its arguments.
    There is no way to run a program with a name different from that of its
    executable.

    If 'search_path' is true (the default), the system's executable
    search path will be used to find the program; otherwise, cmd[0]
    must be the exact path to the executable.  If 'dry_run' is true,
    the command will not actually be run.

    Raise DistutilsExecError if running the program fails in any way; just
    return on success.
    """
    # cmd is documented as a list, but just in case some code passes a tuple
    # in, protect our %-formatting code against horrible death
    cmd = list(cmd)

    log.info(' '.join(cmd))
    if dry_run:
        return

    if search_path:
        executable = find_executable(cmd[0])
        if executable is not None:
            cmd[0] = executable

    env = None
    if sys.platform == 'darwin':
        global _cfg_target, _cfg_target_split
        if _cfg_target is None:
            from distutils import sysconfig
            _cfg_target = sysconfig.get_config_var(
                                  'MACOSX_DEPLOYMENT_TARGET') or ''
            if _cfg_target:
                _cfg_target_split = [int(x) for x in _cfg_target.split('.')]
        if _cfg_target:
            # Ensure that the deployment target of the build process is not
            # less than 10.3 if the interpreter was built for 10.3 or later.
            # This ensures extension modules are built with correct
            # compatibility values, specifically LDSHARED which can use
            # '-undefined dynamic_lookup' which only works on >= 10.3.
            cur_target = os.environ.get('MACOSX_DEPLOYMENT_TARGET', _cfg_target)
            cur_target_split = [int(x) for x in cur_target.split('.')]
            if _cfg_target_split[:2] >= [10, 3] and cur_target_split[:2] < [10, 3]:
                my_msg = ('$MACOSX_DEPLOYMENT_TARGET mismatch: '
                          'now "%s" but "%s" during configure;'
                          'must use 10.3 or later'
                                % (cur_target, _cfg_target))
                raise DistutilsPlatformError(my_msg)
            env = dict(os.environ,
                       MACOSX_DEPLOYMENT_TARGET=cur_target)

    try:
        proc = subprocess.Popen(cmd, env=env)
        proc.wait()
        exitcode = proc.returncode
    except OSError as exc:
        if not DEBUG:
            cmd = cmd[0]
        raise DistutilsExecError(
            "command %r failed: %s" % (cmd, exc.args[-1])) from exc

    if exitcode:
        if not DEBUG:
            cmd = cmd[0]
        raise DistutilsExecError(
              "command %r failed with exit code %s" % (cmd, exitcode))


def find_executable(executable, path=None):
    """Tries to find 'executable' in the directories listed in 'path'.

    A string listing directories separated by 'os.pathsep'; defaults to
    os.environ['PATH'].  Returns the complete filename or None if not found.
    """
    _, ext = os.path.splitext(executable)
    if (sys.platform == 'win32') and (ext != '.exe'):
        executable = executable + '.exe'

    if os.path.isfile(executable):
        return executable

    if path is None:
        path = os.environ.get('PATH', None)
        if path is None:
            try:
                path = os.confstr("CS_PATH")
            except (AttributeError, ValueError):
                # os.confstr() or CS_PATH is not available
                path = os.defpath
        # bpo-35755: Don't use os.defpath if the PATH environment variable is
        # set to an empty string

    # PATH='' doesn't match, whereas PATH=':' looks in the current directory
    if not path:
        return None

    paths = path.split(os.pathsep)
    for p in paths:
        f = os.path.join(p, executable)
        if os.path.isfile(f):
            # the file exists, we have a shot at spawn working
            return f
    return None

Name	Type	Size	Permission
__pycache__	Folder		0755
command	Folder		0755
README	File	244 B	0644
__init__.py	File	541 B	0644
_msvccompiler.py	File	19.54 KB	0644
archive_util.py	File	8.37 KB	0644
bcppcompiler.py	File	14.54 KB	0644
ccompiler.py	File	46.31 KB	0644
cmd.py	File	17.66 KB	0644
config.py	File	4.71 KB	0644
core.py	File	8.67 KB	0644
cygwinccompiler.py	File	16 KB	0644
debug.py	File	139 B	0644
dep_util.py	File	3.41 KB	0644
dir_util.py	File	8.17 KB	0644
dist.py	File	49.2 KB	0644
errors.py	File	3.49 KB	0644
extension.py	File	10.28 KB	0644
fancy_getopt.py	File	17.37 KB	0644
file_util.py	File	7.96 KB	0644
filelist.py	File	12.53 KB	0644
log.py	File	1.92 KB	0644
msvc9compiler.py	File	29.74 KB	0644
msvccompiler.py	File	22.99 KB	0644
spawn.py	File	4.55 KB	0644
sysconfig.py	File	13.61 KB	0644
text_file.py	File	12.19 KB	0644
unixccompiler.py	File	15.03 KB	0644
util.py	File	20.54 KB	0644
version.py	File	12.22 KB	0644
versionpredicate.py	File	5.01 KB	0644

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