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