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281 lines
10 KiB
Python
281 lines
10 KiB
Python
##########################################################################
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#
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# pgAdmin 4 - PostgreSQL Tools
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#
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# Copyright (C) 2013 - 2020, The pgAdmin Development Team
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# This software is released under the PostgreSQL Licence
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#
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# #########################################################################
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# Updates browser images(selenoid-docker) depending on arguments passed while
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# running this script.
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# e.g. --chrome /usr/bin/google-chrome --firefox /usr/bin/firefox
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# Access details about switches using help
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# e.g. --help
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import argparse
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import os
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import subprocess
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import sys
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import traceback
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import requests
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import json
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def read_command_line():
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"""Read the command line arguments.
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Returns:
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ArgumentParser: The parsed arguments object
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"""
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parser = argparse.ArgumentParser(
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description='Get latest browser images(chrome & firefox) for selenoid.'
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'e.g. - --chrome /usr/bin/google-chrome --firefox '
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'/usr/bin/firefox')
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parser.add_argument("--chrome", metavar="CHROME",
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help="the Chrome executable path")
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parser.add_argument("--firefox", metavar="FIREFOX",
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help="the firefox executable path")
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args_val = parser.parse_args()
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return args_val
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def get_browser_version(browser_name, executable_path):
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"""
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Function returns browser version for specified browser using executable
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path passed in arguments.
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:param browser_name:
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:param executable_path: e.g. /usr/bin/firefox
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:return: browser version
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"""
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# On Linux/Mac we run the browser executable with the --version flag,
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# then parse the output.
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browser_version_val = None
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try:
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result = subprocess.Popen([executable_path, '--version'],
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stdout=subprocess.PIPE)
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except FileNotFoundError:
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print('The specified browser executable could not be found.')
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sys.exit(1)
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version_str = result.stdout.read().decode("utf-8")
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if browser_name.lower() == "chrome":
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# Check for 'Chrom' not 'Chrome' in case the user is using Chromium.
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if "Chrom" not in version_str:
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print('The specified Chrome executable output an unexpected '
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'version string: {}.'.format(version_str))
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sys.exit(1)
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# On some linux distro `chrome--version` gives output like
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# 'Google Chrome 80.0.3987.132 unknown\n'
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# so we need to check and remove the unknown string from the version
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if version_str.endswith("unknown\n"):
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version_str = version_str.strip("unknown\n").strip()
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chrome_version = '.'.join(version_str.split()[-1].split('.')[:-2])
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# Make sure browser version has only 1 decimal point
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if chrome_version.count('.') != 1:
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print('The specified Chrome executable output an unexpected '
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'version string: {}.'.format(version_str))
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sys.exit(1)
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browser_version_val = chrome_version
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elif browser_name.lower() == "firefox":
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if "Firefox" not in version_str:
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print('The specified Firefox executable output an unexpected '
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'version string: {}.'.format(version_str))
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sys.exit(1)
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# Some time firefox --version gives output like
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# 'Running without a11y support!
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# Mozilla Firefox 68.7.0esr'
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# Other output - [root@localhost local]# /usr/bin/firefox --version
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# Mozilla Firefox 75.0
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if 'esr' in version_str:
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firefox_version = '.'.join(
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version_str.split('esr')[0].split()[-1].split('.')[:-1])
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else:
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firefox_version = '.'.join(
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version_str.split()[-1].split('.')[:-1])
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if firefox_version.count('.') == 0:
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firefox_version = firefox_version + '.0'
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# Make sure browser version has only 1 decimal point
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if firefox_version.count('.') != 1:
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print('The specified Firefox executable output an unexpected '
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'version string: {}.'.format(version_str))
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sys.exit(1)
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browser_version_val = firefox_version
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else:
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print("{0} is not recognised ".format(browser_name))
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sys.exit(1)
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return browser_version_val
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def check_and_download_vnc_browser_image(browser_name, browser_version):
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"""
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Function checks presence for vnc images for passed browser
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at docker.io/selenoid/ registry
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:param browser_name:
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:param browser_version:
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:return:true if browser image is available & downloaded else false
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"""
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res = requests.get(
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'https://registry.hub.docker.com/v2/repositories/selenoid/vnc_' +
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browser_name + '/tags/')
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res = res.json()
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version_tag = []
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if len(res['results']) > 0:
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for result in res['results']:
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if 'name' in result:
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version_tag.append(result['name'])
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vnc_image_available = False
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image_name = 'vnc_' + browser_name + ':' + browser_version
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for idx, tag in enumerate(version_tag):
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if browser_version == tag:
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command = 'docker pull selenoid/vnc_' + browser_name + ':' \
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+ browser_version
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print(' VNC image is available & downloading now... {0}'.format(
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command))
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try:
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subprocess.call([command], shell=True, stdout=subprocess.PIPE)
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vnc_image_available = True
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except Exception:
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traceback.print_exc(file=sys.stderr)
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print(
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'{0} Image found but could not be downloaded.'.
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format(command))
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sys.exit(1)
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break
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elif idx == len(version_tag):
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print("{0} Image is not available.".format(image_name))
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vnc_image_available = False
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return vnc_image_available
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def reload_selenoid_config():
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"""
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Function runs command to refresh selenoid configuration
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:return: true if command execution for selenoid reload is successful
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else false
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"""
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command = 'docker kill -s HUP selenoid'
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reload_successful = False
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try:
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subprocess.call([command], shell=True, stdout=subprocess.PIPE)
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print(" Selenoid Configuration is reloaded.")
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reload_successful = True
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except Exception:
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traceback.print_exc(file=sys.stderr)
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print('Error while reloading selenoid configuration.')
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sys.exit(1)
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return reload_successful
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def edit_browsers_json(browser_name, browser_version):
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"""
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Function edits browsers.json which is used by selenoid to
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load browser configuration.
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Default path for this file is
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"user_home_dir + '/.aerokube/selenoid/browsers.json'"
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Currently this is hardcoded, might need to modify
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if we want to pass customize browsers.json
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:param browser_name:
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:param browser_version:
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:return:
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"""
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file_edited = True
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# Read existing browsers.json
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json_file = open(file_path, 'r')
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existing_data = json.load(json_file)
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updated_data = None
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# Update data for new browser images
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if browser_name.lower() == 'chrome':
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version_data = existing_data['chrome']['versions']
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if browser_version in version_data.keys():
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print(" {0}:{1} is already updated in browsers.json.".format(
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browser_name, browser_version))
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file_edited = True
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else:
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data_to_insert = dict(
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{browser_version: {
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'image': 'selenoid/vnc_chrome:' + browser_version,
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'port': '4444', 'path': '/'}})
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(existing_data['chrome']['versions']).update(data_to_insert)
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updated_data = existing_data
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print(updated_data)
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elif browser_name.lower() == 'firefox':
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version_data = existing_data['firefox']['versions']
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if browser_version in version_data.keys():
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print(" {0}:{1} is already updated in browsers.json.".format(
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browser_name, browser_version))
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file_edited = True
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else:
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data_to_insert = dict(
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{browser_version: {
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'image': 'selenoid/vnc_firefox:' + browser_version,
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'port': '4444', 'path': '/wd/hub'}})
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(existing_data['firefox']['versions']).update(data_to_insert)
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updated_data = existing_data
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else:
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print("Browser version not matched")
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file_edited = False
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# Write updated data in browsers.json
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if updated_data is not None:
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json_file = open(file_path, 'w')
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json.dump(updated_data, json_file)
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print(" 'browsers.json' is updated for {0} {1}".format(
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browser_name, browser_version))
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file_edited = True
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return file_edited
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# Main Program starts here
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# Read command line arguments & get list of browser_name, executable path.
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args = vars(read_command_line())
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# Get path path for browsers.json
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user_home_dir = os.getenv("HOME")
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file_path = user_home_dir + '/.aerokube/selenoid/browsers.json'
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print("***** Updating '{0}' for new browser versions.*****".format(file_path))
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# Iterate over arguments passed
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for browser, executable_path in args.items():
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if executable_path is not None:
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# Get browser name
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browser_name = browser
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# Get browser version
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browser_version = get_browser_version(browser, executable_path)
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print(
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" Browser version for {0} is {1} in current executable path ".
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format(browser_name, browser_version))
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# Download vnc browser image.
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download_new_image = check_and_download_vnc_browser_image(
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browser_name, browser_version)
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# If browser vnc image is available, then edit browsers.json
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if download_new_image:
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if edit_browsers_json(browser_name, browser_version):
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print(
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" File 'browsers.json' is updated for {0} - {1} \n".format(
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browser_name, browser_version))
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else:
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print(
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" File 'browsers.json' can NOT be updated for {0} - {1} \n"
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.format(browser_name, browser_version))
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else:
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print(" Browser image is not available for {0}, {1}".format(
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browser_name, browser_version))
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# Reload selenoid configuration
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if reload_selenoid_config():
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print(
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"***** Updated '{0}' for new browser versions.*****".format(file_path))
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