Add py-sphinxcontrib-serializinghtml package (#13274)

var/spack/repos/builtin/packages/py-sphinxcontrib-serializinghtml/package.py

@@ -0,0 +1,23 @@
+# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class PySphinxcontribSerializinghtml(PythonPackage):
+    """sphinxcontrib-serializinghtml is a sphinx extension which outputs
+    "serialized" HTML files (json and pickle)."""
+
+    homepage = "http://sphinx-doc.org/"
+    url      = "https://pypi.io/packages/source/s/sphinxcontrib-serializinghtml/sphinxcontrib-serializinghtml-1.1.3.tar.gz"
+
+    version('1.1.3', sha256='c0efb33f8052c04fd7a26c0a07f1678e8512e0faec19f4aa8f2473a8b81d5227')
+
+    depends_on('python@3.5:', type=('build', 'run'))
+    depends_on('py-setuptools', type='build')
+
+    def test(self):
+        # Requires sphinx, creating a circular dependency
+        pass