1 files changed, 35 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/applications/science/math/sage/patches/Only-test-py2-py3-optional-tests-when-all-of-sage-is.patch b/nixpkgs/pkgs/applications/science/math/sage/patches/Only-test-py2-py3-optional-tests-when-all-of-sage-is.patch
new file mode 100644
index 000000000000..8cd80281d0e4
--- /dev/null
+++ b/nixpkgs/pkgs/applications/science/math/sage/patches/Only-test-py2-py3-optional-tests-when-all-of-sage-is.patch
@@ -0,0 +1,35 @@
+From 8218bd4fdeb4c92de8af0d3aabec55980fc4fb3d Mon Sep 17 00:00:00 2001
+From: Timo Kaufmann <timokau@zoho.com>
+Date: Sun, 21 Oct 2018 17:52:40 +0200
+Subject: [PATCH] Only test py2/py3 optional tests when all of sage is tested
+
+---
+ src/sage/doctest/control.py | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/src/sage/doctest/control.py b/src/sage/doctest/control.py
+index bf18df8b2b..935c67abf7 100644
+--- a/src/sage/doctest/control.py
++++ b/src/sage/doctest/control.py
+@@ -362,7 +362,8 @@ class DocTestController(SageObject):
+                     if not optionaltag_regex.search(o):
+                         raise ValueError('invalid optional tag {!r}'.format(o))
+ 
+-                options.optional |= auto_optional_tags
++                if "sage" in options.optional:
++                    options.optional |= auto_optional_tags
+ 
+         self.options = options
+ 
+@@ -765,7 +766,7 @@ class DocTestController(SageObject):
+             sage: DC = DocTestController(DD, [dirname])
+             sage: DC.expand_files_into_sources()
+             sage: sorted(DC.sources[0].options.optional)  # abs tol 1
+-            ['guava', 'magma', 'py2']
++            ['guava', 'magma']
+ 
+         We check that files are skipped appropriately::
+ 
+-- 
+2.18.1
+