[PATCH 1/5] gnu: python-cryptography: Define 'python2-variant'.

[Leo Famulari <leo@famulari.name>]

* gnu/packages/python.scm (python-cryptography)[properties]: New field.
(python2-cryptography): Use 'strip-python2-variant'.
---
 gnu/packages/python.scm | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index 5b988c1..982de40 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -2334,11 +2334,8 @@ OAuth request-signing logic.")
   (let ((base (package-with-python2 python-oauthlib)))
     (package
       (inherit base)
-      (inputs
-       `(("python2-unittest2" ,python2-unittest2)
-         ("python2-cryptography" ,python2-cryptography)
-         ,@(alist-delete "python-cryptography"
-	                 (package-inputs base)))))))
+      (inputs `(("python2-unittest2" ,python2-unittest2)
+                 ,@(package-inputs base))))))
 
 (define-public python-itsdangerous
   (package
@@ -5821,10 +5818,12 @@ library” for Python.  The package includes both high level recipes, and low
 level interfaces to common cryptographic algorithms such as symmetric ciphers,
 message digests and key derivation functions.")
     ;; Distributed under either BSD-3 or ASL2.0
-    (license (list bsd-3 asl2.0))))
+    (license (list bsd-3 asl2.0))
+    (properties `((python2-variant . ,(delay python2-cryptography))))))
 
 (define-public python2-cryptography
-  (let ((crypto (package-with-python2 python-cryptography)))
+  (let ((crypto (package-with-python2
+                 (strip-python2-variant python-cryptography))))
     (package (inherit crypto)
       (propagated-inputs
        `(("python2-ipaddress" ,python2-ipaddress)
@@ -5881,12 +5880,7 @@ library.")
     (license asl2.0)))
 
 (define-public python2-pyopenssl
-  (let ((pyopenssl (package-with-python2 python-pyopenssl)))
-    (package (inherit pyopenssl)
-      (propagated-inputs
-       `(("python2-cryptography" ,python2-cryptography)
-         ,@(alist-delete "python-cryptography"
-                         (package-propagated-inputs pyopenssl)))))))
+  (package-with-python2 python-pyopenssl))
 
 (define-public python-pip
   (package
-- 
2.6.3