Add ladot package (#10905)

var/spack/repos/builtin/packages/ladot/package.py

+# 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 Ladot(Package):
+    """Ladot is a script that makes using LaTeX in graphs generated by dot
+    (graphviz) relatively easy."""
+
+    homepage = "https://brighten.bigw.org/projects/ladot/"
+    url      = "https://brighten.bigw.org/projects/ladot/ladot-1.2.tar.gz"
+
+    version('1.2', sha256='f829eeca829b82c0315cd87bffe410bccab96309b86b1c883b3ddaa93170f25e')
+
+    depends_on('perl', type=('run', 'test'))
+    depends_on('graphviz', type=('run', 'test'))
+    depends_on('texlive', type='test')
+
+    def install(self, spec, prefix):
+        if self.run_tests:
+            with working_dir('example'):
+                make()
+
+        mkdir(prefix.bin)
+        install('ladot', prefix.bin)