intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 106 insertions, 0 deletions

diff --git a/contrib/python/ipython/py2/IPython/utils/process.py b/contrib/python/ipython/py2/IPython/utils/process.py
new file mode 100644
index 0000000000..a274f43f3a
--- /dev/null
+++ b/contrib/python/ipython/py2/IPython/utils/process.py
@@ -0,0 +1,106 @@
+# encoding: utf-8
+"""
+Utilities for working with external processes.
+"""
+
+# Copyright (c) IPython Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+from __future__ import print_function
+
+import os
+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
+else:
+    from ._process_posix import system, getoutput, arg_split, check_pid
+
+from ._process_common import getoutputerror, get_output_error_code, process_handler
+from . import py3compat
+
+
+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::
+
+        from IPython.utils.path import get_ipython_module_path
+        from IPython.utils.process import pycmd2argv
+        argv = pycmd2argv(get_ipython_module_path('IPython.terminal.ipapp'))
+
+    Parameters
+    ----------
+    cmd : str
+        The command line program to look for.
+    """
+    path = py3compat.which(cmd)
+    if path is None:
+        raise FindCmdError('command could not be found: %s' % cmd)
+    return path
+
+
+def is_cmd_found(cmd):
+    """Check whether executable `cmd` exists or not and return a bool."""
+    try:
+        find_cmd(cmd)
+        return True
+    except FindCmdError:
+        return False
+
+
+def pycmd2argv(cmd):
+    r"""Take the path of a python command and return a list (argv-style).
+
+    This only works on Python based command line programs and will find the
+    location of the ``python`` executable using ``sys.executable`` to make
+    sure the right version is used.
+
+    For a given path ``cmd``, this returns [cmd] if cmd's extension is .exe,
+    .com or .bat, and [, cmd] otherwise.
+
+    Parameters
+    ----------
+    cmd : string
+      The path of the command.
+
+    Returns
+    -------
+    argv-style list.
+    """
+    ext = os.path.splitext(cmd)[1]
+    if ext in ['.exe', '.com', '.bat']:
+        return [cmd]
+    else:
+        return [sys.executable, cmd]
+
+
+def abbrev_cwd():
+    """ Return abbreviated version of cwd, e.g. d:mydir """
+    cwd = py3compat.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))