def _verify_pip_is_installed():
"""Verify that pip is installed.
Raises:
ImportError. Error importing pip.
"""
try:
python_utils.PRINT('Checking if pip is installed on the local machine')
# Importing pip just to check if its installed.
import pip #pylint: disable=unused-variable
except ImportError as e:
common.print_each_string_after_two_new_lines([
'Pip is required to install Oppia dependencies, but pip wasn\'t '
'found on your local machine.',
'Please see \'Installing Oppia\' on the Oppia developers\' wiki '
'page:'])
if common.is_mac_os():
python_utils.PRINT(
'https://github.com/oppia/oppia/wiki/Installing-Oppia-%28Mac-'
'OS%29')
elif common.is_linux_os():
python_utils.PRINT(
'https://github.com/oppia/oppia/wiki/Installing-Oppia-%28Linux'
'%29')
else:
python_utils.PRINT(
'https://github.com/oppia/oppia/wiki/Installing-Oppia-%28'
'Windows%29')
raise ImportError('Error importing pip: %s' % e)
def create_managed_web_browser(port):
"""Returns a context manager for a web browser targeting the given port on
localhost. If a web browser cannot be opened on the current system by Oppia,
then returns None instead.
Args:
port: int. The port number to open in the web browser.
Returns:
context manager|None. The context manager to a web browser window, or
None if the current operating system does not support web browsers.
"""
url = 'http://localhost:%s/' % port
human_readable_name = 'Web Browser'
if common.is_linux_os():
if any(re.match('.*VBOX.*', d) for d in os.listdir('/dev/disk/by-id/')):
return None
else:
return managed_process(
['xdg-open', url], human_readable_name=human_readable_name)
elif common.is_mac_os():
return managed_process(
['open', url], human_readable_name=human_readable_name)
else:
return None
def verify_pip_is_installed():
"""Verify that pip is installed.
Raises:
ImportError. Error importing pip.
"""
python_utils.PRINT('Checking if pip is installed on the local machine')
try:
import pip
except ImportError as e:
common.print_each_string_after_two_new_lines([
'Pip is required to install Oppia dependencies, but pip wasn\'t '
'found on your local machine.',
'Please see \'Installing Oppia\' on the Oppia developers\' wiki '
'page:'
])
if common.is_mac_os():
python_utils.PRINT(
'https://github.com/oppia/oppia/wiki/Installing-Oppia-%28Mac-'
'OS%29')
elif common.is_linux_os():
python_utils.PRINT(
'https://github.com/oppia/oppia/wiki/Installing-Oppia-%28Linux'
'%29')
else:
python_utils.PRINT(
'https://github.com/oppia/oppia/wiki/Installing-Oppia-%28'
'Windows%29')
raise ImportError('Error importing pip: %s' % e)
else:
if pip.__version__ != OPPIA_REQUIRED_PIP_VERSION:
common.print_each_string_after_two_new_lines([
'Oppia requires pip==%s, but you have pip==%s installed.' %
(OPPIA_REQUIRED_PIP_VERSION, pip.__version__),
'Upgrading pip on your behalf...',
])
_run_pip_command(
['install', 'pip==%s' % OPPIA_REQUIRED_PIP_VERSION])
