Update URL parsing regexes and tests (#13411)

* Update URL parsing regexes and tests

* Get rid of no longer used README

* Merge py-udunits and py-cf-units

* netcdf -> netcdf-c

* setup_environment -> setup_*_environment

* Fix doc tests

* Few last minute fixes

* Simplify prefix removal copypasta

var/spack/repos/builtin/packages/eq-r/package.py

@@ -0,0 +1,54 @@
+# 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 *
+import os
+
+
+class EqR(AutotoolsPackage):
+    """
+    EMEWS Queues for R (EQ/R)
+    Installs EQ/R.
+    """
+
+    homepage = "http://emews.org"
+    url      = "https://github.com/emews/EQ-R/archive/1.0.tar.gz"
+    git      = "https://github.com/emews/EQ-R.git"
+
+    version('master', branch='master')
+
+    version('1.0', sha256='68047cb0edf088eaaefc5e36cefda9818292e5c832593e10a1dd9c73c27661b6')
+
+    depends_on('autoconf', type='build')
+    depends_on('automake', type='build')
+    depends_on('libtool',  type='build')
+    depends_on('m4',       type='build')
+    depends_on('mpi')
+    depends_on('r-rinside')
+    depends_on('r-rcpp')
+    depends_on('r')
+    depends_on('tcl')
+    depends_on('swig')
+
+    configure_directory = 'src'
+
+    def setup_build_environment(self, env):
+        spec = self.spec
+        env.set('CC', spec['mpi'].mpicc)
+        env.set('CXX', spec['mpi'].mpicxx)
+        env.set('CXXLD', spec['mpi'].mpicxx)
+
+    def configure_args(self):
+        args = ['--with-tcl=' + self.spec['tcl'].prefix]
+        r_location = '{0}/rlib/R'.format(self.spec['r'].prefix)
+        if not os.path.exists(r_location):
+            rscript = which('Rscript')
+            if rscript is not None:
+                r_location = rscript('-e', 'cat(R.home())')
+            else:
+                msg = 'couldn\'t locate Rscript on your PATH'
+                raise RuntimeError(msg)
+        args.append('--with-r={0}'.format(r_location))
+        return args