pkg_resources

__init__.py

"""
For some reason vendored third-party libraries don't have access to `pkg_resources`. Unfortunately,
this means these libraries will cause errors like this when they try to load:

ERROR    2017-12-12 06:13:05,691 wsgi.py:263]
Traceback (most recent call last):
  File "/Users/mmiller/google-cloud-sdk/platform/google_appengine/google/appengine/runtime/wsgi.py", line 240, in Handle
    handler = _config_handle.add_wsgi_middleware(self._LoadHandler())
  # ...snip...
  File "/Users/mmiller/Repos/some_django_proj/lib/django_hosts/__init__.py", line 2, in <module>
    import pkg_resources
ImportError: No module named pkg_resources

To combat this, we're stubbing out a few of its methods so that we don't need to maintain modified
copies of these third-party libraries
"""

def parse_version_stub(version):
    """
    Simply pass through the version given
    """
    return version

class DistStub(object):
    version = '0.00'

DIST_STUB = DistStub()

def get_distribution_stub(dist_name):
    """
    Return a basic class with a version property
    """
    return DIST_STUB

# Stub out parse_version if it's not available
try:
    from pkg_resources import parse_version as pv
    parse_version = pv
except ImportError:
    parse_version = parse_version_stub

# Stub out get_distribution if it's not available
try:
    from pkg_resources import get_distribution as gd
    get_distribution = gd
except ImportError:
    get_distribution = get_distribution_stub