jupyter

packages/python/yap_kernel/yap_ipython/utils/process.py

@@ -0,0 +1,69 @@
+# encoding: utf-8
+"""
+Utilities for working with external processes.
+"""
+
+# Copyright (c) yap_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
+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 yap_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', 'yap_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))