Fix resource errors

Signed-off-by: Dan Ryan <dan@danryan.co>

pipenv/environment.py

@@ -25,7 +25,7 @@ class Environment(object):
         super(Environment, self).__init__()
         self._modules = {'pkg_resources': pkg_resources, 'pipenv': pipenv}
         self.base_working_set = base_working_set if base_working_set else BASE_WORKING_SET
-        self.is_venv = not os.path.samefile(os.path.abspath(prefix), sys.prefix)
+        self.is_venv = not os.samefile(os.path.abspath(prefix), sys.prefix)
         if not sources:
             sources = []
         self.sources = sources

pipenv/vendor/requirementslib/__init__.py

@@ -3,12 +3,11 @@ __version__ = '1.2.6'
 
 import logging
 import warnings
-
-warnings.filterwarnings("ignore", category=ResourceWarning)
-
+from vistir.compat import ResourceWarning
 
 logger = logging.getLogger(__name__)
 logger.addHandler(logging.NullHandler())
+warnings.filterwarnings("ignore", category=ResourceWarning)
 
 from .models.requirements import Requirement
 from .models.lockfile import Lockfile

pipenv/vendor/requirementslib/models/cache.py

@@ -1,6 +1,7 @@
 # -*- coding=utf-8 -*-
 from __future__ import absolute_import, print_function, unicode_literals
 
+import atexit
 import copy
 import hashlib
 import json
@@ -197,6 +198,7 @@ class HashCache(SafeFileCache):
         if not session:
             import requests
             session = requests.session()
+            atexit.register(session.close)
         cache_dir = kwargs.pop('cache_dir', CACHE_DIR)
         self.session = session
         kwargs.setdefault('directory', os.path.join(cache_dir, 'hash-cache'))

pipenv/vendor/requirementslib/models/dependencies.py

@@ -1,5 +1,6 @@
 # -*- coding=utf-8 -*-
 
+import atexit
 import contextlib
 import copy
 import functools
@@ -361,6 +362,7 @@ def get_dependencies_from_json(ireq):
         return
 
     session = requests.session()
+    atexit.register(session.close)
     version = str(ireq.req.specifier).lstrip("=")
 
     def gen(ireq):
@@ -575,6 +577,7 @@ def get_finder(sources=None, pip_command=None, pip_options=None):
     if not pip_options:
         pip_options = get_pip_options(sources=sources, pip_command=pip_command)
     session = pip_command._build_session(pip_options)
+    atexit.register(session.close)
     finder = pip_shims.shims.PackageFinder(
         find_links=[],
         index_urls=[s.get("url") for s in sources],