cpython/Tools/c-analyzer/distutils/spawn.py at main · https-github-com-nzysoft/cpython · GitHub

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"""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 os.path

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

cpython/Tools/c-analyzer/distutils/spawn.py at main · https-github-com-nzysoft/cpython · GitHub

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