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checkdependencies.py

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from importlib import import_module

from os import environ

import sys

from packaging.version import Version

from pythonforandroid.prerequisites import (

check_and_install_default_prerequisites,

)

def check_python_dependencies():

"""

Check if the Python requirements are installed. This must appears

before other imports because otherwise they're imported elsewhere.

Using the ok check instead of failing immediately so that all

errors are printed at once.

"""

ok = True

modules = [("colorama", "0.3.3"), "appdirs", ("sh", "1.10"), "jinja2"]

for module in modules:

if isinstance(module, tuple):

module, version = module

else:

version = None

try:

import_module(module)

except ImportError:

if version is None:

print(

"ERROR: The {} Python module could not be found, please "

"install it.".format(module)

)

ok = False

else:

print(

"ERROR: The {} Python module could not be found, "

"please install version {} or higher".format(

module, version

)

)

ok = False

else:

if version is None:

continue

try:

cur_ver = sys.modules[module].__version__

except AttributeError: # this is sometimes not available

continue

if Version(cur_ver) < Version(version):

print(

"ERROR: {} version is {}, but python-for-android needs "

"at least {}.".format(module, cur_ver, version)

)

ok = False

if not ok:

print("python-for-android is exiting due to the errors logged above")

exit(1)

def check():

if not environ.get("SKIP_PREREQUISITES_CHECK", "0") == "1":

check_and_install_default_prerequisites()

check_python_dependencies()