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#!/usr/bin/env python3
# Copyright 2013 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Launches Chrome.
This script launches Chrome and waits until its window shows up.
"""
import optparse
import sys
import time
import win32process
import chrome_helper
def WaitForWindow(process_id, class_pattern):
"""Waits until a window specified by |process_id| and class name shows up.
Args:
process_id: The ID of the process that owns the window.
class_pattern: The regular expression pattern of the window class name.
Returns:
A boolean value indicating whether the specified window shows up within
30 seconds.
"""
start_time = time.time()
while time.time() - start_time < 30:
if chrome_helper.WindowExists([process_id], class_pattern):
return True
time.sleep(0.1)
return False
def main():
usage = 'usage: %prog chrome_path'
parser = optparse.OptionParser(usage, description='Launch Chrome.')
_, args = parser.parse_args()
if len(args) != 1:
parser.error('Incorrect number of arguments.')
chrome_path = args[0]
# Use CreateProcess rather than subprocess.Popen to avoid side effects such
# as handle inheritance.
_, _, process_id, _ = win32process.CreateProcess(
None, chrome_path, None, None, 0, 0, None, None,
win32process.STARTUPINFO())
if not WaitForWindow(process_id, 'Chrome_WidgetWin_'):
raise Exception('Could not launch Chrome.')
return 0
if __name__ == '__main__':
sys.exit(main())
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