Merge pull request #1615 from alex/setuptools-warnings

Fixed #1614 -- don't cause warnings with the latest setuptools

1 files changed, 7 insertions, 2 deletions

diff --git a/src/cryptography/hazmat/backends/__init__.py b/src/cryptography/hazmat/backends/__init__.py
index 24c029f6..256fee39 100644
--- a/src/cryptography/hazmat/backends/__init__.py
+++ b/src/cryptography/hazmat/backends/__init__.py
@@ -17,8 +17,13 @@ def _available_backends():
 
     if _available_backends_list is None:
         _available_backends_list = [
-            backend.load(require=False)
-            for backend in pkg_resources.iter_entry_points(
+            # setuptools 11.3 deprecated support for the require parameter to
+            # load(), and introduced the new resolve() method instead.
+            # This can be removed if/when we can assume setuptools>=11.3. At
+            # some point we may wish to add a warning, to push people along,
+            # but at present this would result in too many warnings.
+            ep.resolve() if hasattr(ep, "resolve") else ep.load(require=False)
+            for ep in pkg_resources.iter_entry_points(
                 "cryptography.backends"
             )
         ]