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author | 2022-11-13 23:46:45 +0530 | |
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committer | 2022-11-13 23:46:45 +0530 | |
commit | 9468226a9e2e2ab8cdd599f1d8538e860ca86120 (patch) | |
tree | 0a77ada226d6db80639f96b438bf83e4e756edb5 /env/lib/python3.10/site-packages/setuptools/_distutils/spawn.py | |
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Diffstat (limited to 'env/lib/python3.10/site-packages/setuptools/_distutils/spawn.py')
-rw-r--r-- | env/lib/python3.10/site-packages/setuptools/_distutils/spawn.py | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/env/lib/python3.10/site-packages/setuptools/_distutils/spawn.py b/env/lib/python3.10/site-packages/setuptools/_distutils/spawn.py new file mode 100644 index 0000000..acd2014 --- /dev/null +++ b/env/lib/python3.10/site-packages/setuptools/_distutils/spawn.py @@ -0,0 +1,107 @@ +"""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 DistutilsExecError +from distutils.debug import DEBUG +from distutils import log + + +def spawn(cmd, search_path=1, verbose=0, dry_run=0, env=None): + """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: %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 |