| import os.path |
| import site |
| import sys |
| |
| |
| def running_under_virtualenv(): |
| # type: () -> bool |
| """ |
| Return True if we're running inside a virtualenv, False otherwise. |
| |
| """ |
| if hasattr(sys, 'real_prefix'): |
| # pypa/virtualenv case |
| return True |
| elif sys.prefix != getattr(sys, "base_prefix", sys.prefix): |
| # PEP 405 venv |
| return True |
| |
| return False |
| |
| |
| def virtualenv_no_global(): |
| # type: () -> bool |
| """ |
| Return True if in a venv and no system site packages. |
| """ |
| # this mirrors the logic in virtualenv.py for locating the |
| # no-global-site-packages.txt file |
| site_mod_dir = os.path.dirname(os.path.abspath(site.__file__)) |
| no_global_file = os.path.join(site_mod_dir, 'no-global-site-packages.txt') |
| if running_under_virtualenv() and os.path.isfile(no_global_file): |
| return True |
| else: |
| return False |
