def test_install_django():
os.system('pip uninstall django -y -q')
with pytest.raises(ImportError):
import django
file_resource = pw.pip_package('django==1.6.2')
with pytest.raises(ImportError):
import django
changes = file_resource.apply()
with pytest.raises(ImportError):
import django
changes[0].commit()
# ok
import django
changes = file_resource.rollback()
# still ok
reload(django)
changes[0].commit()
with pytest.raises(Exception):
reload(django)
def pre_setup(cls):
super(Common, cls).pre_setup()
cls.load_features()
ctx = Context()
with pw.resource_set(ctx, name='main'):
for feature in cls.FEATURES:
requirements = []
for req in feature.get_required_packages(cls):
requirements.append(req)
if requirements:
ctx.apply(
pw.pip_package(*requirements)
)
changes = ctx.changeset()
if changes.needed():
if len(sys.argv) == 2 and sys.argv[1] == '--requirements':
print('\nChanges to be applied:\n')
for item in changes.items:
print('\t - %s' % item.description)
changes.commit()
exit(0)
else:
print('\nSome required packages are not installed:\n')
for item in changes.items:
print('\t - %s' % item.description)
print 'Execute "cratis --requirements" to install those'
exit(1)