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koprocessutils.py
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110 lines (92 loc) · 4.03 KB
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# ***** BEGIN LICENSE BLOCK *****
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
#
# The contents of this file are subject to the Mozilla Public License
# Version 1.1 (the "License"); you may not use this file except in
# compliance with the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS"
# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
# License for the specific language governing rights and limitations
# under the License.
#
# The Original Code is Komodo code.
#
# The Initial Developer of the Original Code is ActiveState Software Inc.
# Portions created by ActiveState Software Inc are Copyright (C) 2000-2007
# ActiveState Software Inc. All Rights Reserved.
#
# Contributor(s):
# ActiveState Software Inc
#
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 2 or later (the "GPL"), or
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
#
# ***** END LICENSE BLOCK *****
"""
Some utility routines for using Komodo's process control facilities.
Note: This file should be initialized from the main thread by calling
its "initialize" method.
HOWTO spawn a process with the user's (pre-komodo-mucking)
environment:
import process
import koprocessutils
env = koprocessutils.getUserEnv()
# make any desired changes to 'env'...
# - Only insert unicode strings because: Win32's CreateProcess
# requires that all strings in 'env' either be plain strings
# or all unicode strings and getUserEnv() just converts
# everything to unicode. (XXX This conversion is obselete since
# _SaferCreateProcess in process.py.)
p = process.ProcessOpen(cmd, env=env)
"""
from __future__ import absolute_import
from xpcom import components, nsError, ServerException
import six
#---- globals
_gUserEnvCache = None
#---- public methods
def initialize():
"""Startup and use required services from the main thread.
This implies that this method must be called from the main thread.
"""
global _gUserEnvCache
userEnvSvc = components.classes["@activestate.com/koUserEnviron;1"].getService()
userEnv = {}
for piece in userEnvSvc.GetEnvironmentStrings():
key, val = piece.split('=', 1)
#XXX This unicode conversion is not necessary since
# _SaferCreateProcess in process.py. Keeping it for Komodo 2.0
# release though.
userEnv[six.text_type(key)] = six.text_type(val)
if 'PWD' in userEnv:
del userEnv['PWD']
_gUserEnvCache = userEnv
def resetUserEnv():
"""Reset the user environment cache."""
global _gUserEnvCache
first_initialization = _gUserEnvCache is None
initialize()
if not first_initialization:
# Notify that the user environment has changed.
obsSvc = components.classes["@mozilla.org/observer-service;1"]. \
getService(components.interfaces.nsIObserverService)
obsSvc.notifyObservers(None, "user_environment_changed", "")
def getUserEnv():
"""Return an environment dictionary representing the user's
environment when Komodo was started.
"""
if _gUserEnvCache is None:
raise ServerException(nsError.NS_ERROR_NOT_INITIALIZED,
"koprocessutils module was not initialized")
return dict(_gUserEnvCache)