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# encoding: utf-8
"""
Utilities for working with external processes.
"""
# Copyright (c) IPython Development Team.
# Distributed under the terms of the Modified BSD License.
import os
import shutil
import sys
if sys.platform == 'win32':
from ._process_win32 import system, getoutput, arg_split, check_pid
elif sys.platform == 'cli':
from ._process_cli import system, getoutput, arg_split, check_pid
elif sys.platform == "emscripten":
from ._process_emscripten import system, getoutput, arg_split, check_pid
else:
from ._process_posix import system, getoutput, arg_split, check_pid
from ._process_common import getoutputerror, get_output_error_code, process_handler
class FindCmdError(Exception):
pass
def find_cmd(cmd):
"""Find absolute path to executable cmd in a cross platform manner.
This function tries to determine the full path to a command line program
using `which` on Unix/Linux/OS X and `win32api` on Windows. Most of the
time it will use the version that is first on the users `PATH`.
Warning, don't use this to find IPython command line programs as there
is a risk you will find the wrong one. Instead find those using the
following code and looking for the application itself::
import sys
argv = [sys.executable, '-m', 'IPython']
Parameters
----------
cmd : str
The command line program to look for.
"""
path = shutil.which(cmd)
if path is None:
raise FindCmdError('command could not be found: %s' % cmd)
return path
def abbrev_cwd():
""" Return abbreviated version of cwd, e.g. d:mydir """
cwd = os.getcwd().replace('\\','/')
drivepart = ''
tail = cwd
if sys.platform == 'win32':
if len(cwd) < 4:
return cwd
drivepart,tail = os.path.splitdrive(cwd)
parts = tail.split('/')
if len(parts) > 2:
tail = '/'.join(parts[-2:])
return (drivepart + (
cwd == '/' and '/' or tail))
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