forked from varia/varia.website
110 lines
3.4 KiB
Python
110 lines
3.4 KiB
Python
|
"""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 .errors import DistutilsExecError
|
||
|
|
from .debug import DEBUG
|
||
|
|
from ._log import log
|
||
|
|
|
||
|
|
|
||
|
|
def spawn(cmd, search_path=1, verbose=0, dry_run=0, env=None): # noqa: C901
|
||
|
|
"""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(subprocess.list2cmdline(cmd))
|
||
|
|
if dry_run:
|
||
|
|
return
|
||
|
|
|
||
|
|
if search_path:
|
||
|
|
executable = find_executable(cmd[0])
|
||
|
|
if executable is not None:
|
||
|
|
cmd[0] = executable
|
||
|
|
|
||
|
|
env = env if env is not None else dict(os.environ)
|
||
|
|
|
||
|
|
if sys.platform == 'darwin':
|
||
|
|
from distutils.util import MACOSX_VERSION_VAR, get_macosx_target_ver
|
||
|
|
|
||
|
|
macosx_target_ver = get_macosx_target_ver()
|
||
|
|
if macosx_target_ver:
|
||
|
|
env[MACOSX_VERSION_VAR] = macosx_target_ver
|
||
|
|
|
||
|
|
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: {}".format(cmd, exc.args[-1])
|
||
|
|
) from exc
|
||
|
|
|
||
|
|
if exitcode:
|
||
|
|
if not DEBUG:
|
||
|
|
cmd = cmd[0]
|
||
|
|
raise DistutilsExecError(
|
||
|
|
"command {!r} failed with exit code {}".format(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
|