New package: py-ruamel-yaml (#12543)

var/spack/repos/builtin/packages/py-ruamel-yaml/package.py

@@ -0,0 +1,29 @@
+# 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 PyRuamelYaml(PythonPackage):
+    """
+    a YAML parser/emitter that supports roundtrip preservation of comments,
+    seq/map flow style, and map key order
+    """
+
+    homepage = "https://bitbucket.org/ruamel/yaml/src/default/"
+    url      = "https://pypi.io/packages/source/r/ruamel.yaml/ruamel.yaml-0.16.5.tar.gz"
+
+    version('0.16.5', sha256='412a6f5cfdc0525dee6a27c08f5415c7fd832a7afcb7a0ed7319628aed23d408')
+    version('0.11.7', sha256='c89363e16c9eafb9354e55d757723efeff8682d05e56b0881450002ffb00a344')
+
+    depends_on('py-setuptools', type='build')
+
+    @run_after('install')
+    def fix_import_error(self):
+        if str(self.spec['python'].version.up_to(1)) == '2':
+            touch = which('touch')
+            touch(self.prefix + '/' +
+                  self.spec['python'].package.site_packages_dir +
+                  '/ruamel/__init__.py')