py-datalad-metalad: add new package (#26225)

Added py-nose for import and a simple installtest from appveyor.yml

Co-authored-by: Bernhard Kaindl <bernhardkaindl7@gmail.com>

var/spack/repos/builtin/packages/py-datalad-metalad/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 PyDataladMetalad(PythonPackage):
+    """DataLad extension for semantic metadata handling"""
+
+    homepage = "https://github.com/datalad/datalad-metalad/"
+    pypi     = "datalad_metalad/datalad_metalad-0.2.1.tar.gz"
+
+    version('0.2.1', sha256='70fe423136a168f7630b3e0ff1951e776d61e7d5f36670bddf24299ac0870285')
+
+    depends_on('py-setuptools',      type=('build'))
+    depends_on('py-datalad@0.12.3:', type=('build', 'run'))
+    depends_on('git-annex',          type=('run'))
+    depends_on('py-nose',            type=('run', 'test'))
+
+    install_time_test_callbacks = ['test', 'installtest']
+
+    def installtest(self):
+        which('datalad')('wtf')