gnu: Add python-pygpgme

* gnu/packages/gnupg.scm (python-pygpgme, python2-pygpgme): New variables.
* gnu/packages/patches/pygpgme-disable-problematic-tests.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.

gnu-system.am

@@ -665,6 +665,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/pycairo-wscript.patch			\
   gnu/packages/patches/pybugz-encode-error.patch		\
   gnu/packages/patches/pybugz-stty.patch			\
+  gnu/packages/patches/pygpgme-disable-problematic-tests.patch  \
   gnu/packages/patches/pyqt-configure.patch			\
   gnu/packages/patches/python-2-deterministic-build-info.patch	\
   gnu/packages/patches/python-2.7-search-paths.patch		\

gnu/packages/gnupg.scm

@@ -5,6 +5,7 @@
 ;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2015 Paul van der Walt <paul@denknerd.org>
 ;;; Copyright © 2015, 2016 Efraim Flashner <efraim@flashner.co.il>
+;;; Copyright © 2016 Christopher Allan Webber <cwebber@dustycloud.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -23,6 +24,7 @@
 
 (define-module (gnu packages gnupg)
   #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (gnu packages)
   #:use-module (gnu packages adns)
   #:use-module (gnu packages curl)
   #:use-module (gnu packages openldap)
@@ -332,6 +334,46 @@ instead.  This way bug fixes or improvements can be done at a central place
 and every application benefits from this.")
     (license license:lgpl2.1+)))
 
+(define-public python-pygpgme
+  (package
+    (name "python-pygpgme")
+    (version "0.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pygpgme" version))
+       (sha256
+        (base32
+         "1q82p3gs6lwq8j8dxk4pvrwk3jpww1zqcjrzznl9clh10z28gn2z"))
+       ;; Unfortunately, we have to disable some tests due to some gpg-agent
+       ;; goofiness... see:
+       ;;   https://bugs.launchpad.net/pygpgme/+bug/999949
+       (patches (list (search-patch "pygpgme-disable-problematic-tests.patch")))))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'build 'make-build
+           (lambda _
+             (zero? (system* "make" "build"))))
+         (replace 'check
+           (lambda _
+             (zero? (system* "make" "check")))))))
+    (build-system python-build-system)
+    (inputs
+     `(;; setuptools required for python-2 variant
+       ("python-setuptools" ,python-setuptools)
+       ("gnupg" ,gnupg-2.0)
+       ("gpgme" ,gpgme)))
+    (home-page "https://launchpad.net/pygpgme")
+    (synopsis "Python module for working with OpenPGP messages")
+    (description
+     "PyGPGME is a Python module that lets you sign, verify, encrypt and
+decrypt messages using the OpenPGP format by making use of GPGME.")
+    (license license:lgpl2.1+)))
+
+(define-public python2-pygpgme
+  (package-with-python2 python-pygpgme))
+
 (define-public python-gnupg
   (package
     (name "python-gnupg")

gnu/packages/patches/pygpgme-disable-problematic-tests.patch

@@ -0,0 +1,37 @@
+These tests require a gpg agent to run, and are difficult to get to work right
+in Guix's environment.  For more details, see:
+  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=713074
+  https://bugs.launchpad.net/pygpgme/+bug/999949
+
+--- pygpgme-0.3/tests/test_encrypt_decrypt.py	2012-02-28 19:10:28.000000000 -0800
++++ pygpgme-0.3/tests/test_encrypt_decrypt.py	2016-02-05 10:21:58.966685384 -0800
+@@ -125,7 +125,7 @@
+         ctx.decrypt(ciphertext, plaintext)
+         self.assertEqual(plaintext.getvalue(), b'Hello World\n')
+ 
+-    def test_encrypt_symmetric(self):
++    def skip_test_encrypt_symmetric(self):
+         plaintext = BytesIO(b'Hello World\n')
+         ciphertext = BytesIO()
+         def passphrase(uid_hint, passphrase_info, prev_was_bad, fd):
+
+--- pygpgme-0.3/tests/test_passphrase.py	2012-02-28 19:04:17.000000000 -0800
++++ pygpgme-0.3/tests/test_passphrase.py	2016-02-05 10:21:47.990630956 -0800
+@@ -30,7 +30,7 @@
+ 
+     import_keys = ['passphrase.pub', 'passphrase.sec']
+ 
+-    def test_sign_without_passphrase_cb(self):
++    def skip_test_sign_without_passphrase_cb(self):
+         ctx = gpgme.Context()
+         key = ctx.get_key('EFB052B4230BBBC51914BCBB54DCBBC8DBFB9EB3')
+         ctx.signers = [key]
+@@ -51,7 +51,7 @@
+         self.prev_was_bad = prev_was_bad
+         os.write(fd, b'test\n')
+ 
+-    def test_sign_with_passphrase_cb(self):
++    def skip_test_sign_with_passphrase_cb(self):
+         ctx = gpgme.Context()
+         key = ctx.get_key('EFB052B4230BBBC51914BCBB54DCBBC8DBFB9EB3')
+         ctx.signers = [key]