def activate_pex():
entry_point = os.environ.get('UWSGI_PEX')
if not entry_point:
sys.stderr.write('couldnt determine pex from UWSGI_PEX environment variable, bailing!\n')
sys.exit(1)
sys.stderr.write('entry_point=%s\n' % entry_point)
sys.path[0] = os.path.abspath(sys.path[0])
sys.path.insert(0, entry_point)
sys.path.insert(0, os.path.abspath(os.path.join(entry_point, '.bootstrap')))
from pex import pex_bootstrapper
from pex.environment import PEXEnvironment
from pex.finders import register_finders
from pex.pex_info import PexInfo
pex_bootstrapper.monkeypatch_build_zipmanifest()
register_finders()
pex_info = PexInfo.from_pex(entry_point)
print str(pex_info)
env = PEXEnvironment(entry_point, pex_info)
working_set = env.activate()
sys.stderr.write('sys.path=%s\n\n' % sys.path)
return entry_point, pex_info, env, working_set
