Add new r-earth package (#14049)

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

@@ -0,0 +1,25 @@
+# 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 REarth(RPackage):
+    """earth: Multivariate Adaptive Regression Splines.
+
+    Build regression models using the techniques in Friedman's papers
+    "Fast MARS" and "Multivariate Adaptive Regression Splines"
+    <doi:10.1214/aos/1176347963>."""
+
+    homepage = "http://www.milbo.users.sonic.net/earth"
+    url      = "https://cloud.r-project.org/src/contrib/earth_5.1.2.tar.gz"
+    list_url = "https://cloud.r-project.org/src/contrib/Archive/earth"
+
+    version('5.1.2', sha256='326f98e8c29365ca3cd5584cf2bd6529358f5ef81664cbd494162f92b6c3488d')
+
+    depends_on('r@3.4.0:', type=('build', 'run'))
+    depends_on('r-formula@1.2-3:', type=('build', 'run'))
+    depends_on('r-plotmo@3.5.4:', type=('build', 'run'))
+    depends_on('r-teachingdemos@2.10:', type=('build', 'run'))