py-udunits: New package (#7998)

* py-udunits: update

* Use standard py-netcdf4

* Remove unnecssary import?

* Suggested simplifications

* flake8

1 files changed, 69 insertions, 0 deletions

diff --git a/var/spack/repos/builtin/packages/py-udunits/package.py b/var/spack/repos/builtin/packages/py-udunits/package.py
new file mode 100644
index 0000000000..b585fcbfd9
--- /dev/null
+++ b/var/spack/repos/builtin/packages/py-udunits/package.py
@@ -0,0 +1,69 @@
+##############################################################################
+# Copyright (c) 2013-2018, Lawrence Livermore National Security, LLC.
+# Produced at the Lawrence Livermore National Laboratory.
+#
+# This file is part of Spack.
+# Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
+# LLNL-CODE-647188
+#
+# For details, see https://github.com/spack/spack
+# Please also see the NOTICE and LICENSE files for our notice and the LGPL.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License (as
+# published by the Free Software Foundation) version 2.1, February 1999.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
+# conditions of the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+##############################################################################
+from spack import *
+import os
+
+
+class PyUdunits(PythonPackage):
+    """The MetOffice cf_units Python interface to the UDUNITS-2 Library."""
+    homepage = "https://github.com/SciTools/cf_units"
+    url      = "https://github.com/SciTools/cf_units/archive/v1.1.3.tar.gz"
+
+    version('1.1.3', '61ea2239c87b4c1d5d30147800a9e750')
+
+    maintainers = ['citibeth']
+
+    depends_on('py-setuptools', type='build')
+    depends_on('py-six', type=('build', 'run'))
+    depends_on('py-netcdf4', type=('build', 'run'))
+    depends_on('udunits2')
+
+    # See: https://github.com/SciTools/cf_units/blob/master/cf_units/etc/site.cfg.template
+    # udunits2_path = /path/to/libudunits2.so
+    # udunits2_xml_path = /path/to/udunits2.xml
+    site_cfg_template = """[System]
+udunits2_path = %s
+udunits2_xml_path = %s
+"""
+
+    @run_after('install')
+    def configure_template(self):
+        spec = self.spec
+
+        cfg_templates = find(spec.prefix, ['site.cfg.template'])
+        if len(cfg_templates) != 1:
+            tty.die(
+                'Found %d instances of site.cfg.template, wanted 1' %
+                len(cfg_templates))
+        cfg_template = cfg_templates[0]
+
+        cfg = os.path.join(os.path.split(cfg_template)[0], 'site.cfg')
+
+        udunits2_xml_path = os.path.join(
+            spec['udunits2'].prefix, 'share', 'udunits', 'udunits2.xml')
+
+        with open(cfg, 'w') as fout:
+            fout.write(self.site_cfg_template %
+                       (spec['udunits2'].libs, udunits2_xml_path))