xproperty: add new package (#25236)

var/spack/repos/builtin/packages/xproperty/package.py

@@ -0,0 +1,25 @@
+# Copyright 2013-2021 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 Xproperty(CMakePackage):
+    """C++ library providing traitlets-style properties"""
+
+    homepage = "https://github.com/jupyter-xeus/xproperty"
+    url      = "https://github.com/jupyter-xeus/xproperty/archive/0.11.0.tar.gz"
+    git      = "https://github.com/jupyter-xeus/xproperty.git"
+
+    maintainers = ['tomstitt']
+
+    version('master', branch='master')
+    version('0.11.0', sha256='bf86a11c6758308aa0aa0f64d8dd24cd3e9d78378467b74002f552bfb75fc0eb')
+
+    depends_on('xtl@0.7.0:0.7.999', when='@0.11.0:')
+
+    # C++14 support
+    conflicts('%gcc@:4.8')
+    conflicts('%clang@:3.3')