new package: optipng (#12608)

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

@@ -0,0 +1,20 @@
+# 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 Optipng(AutotoolsPackage):
+    """
+    OptiPNG is a PNG optimizer that recompresses image files to a smaller
+    size, without losing any information. This program also converts external
+    formats (BMP, GIF, PNM and TIFF) to optimized PNG, and performs PNG
+    integrity checks and corrections.
+    """
+
+    homepage = "http://optipng.sourceforge.net/"
+    url      = "http://prdownloads.sourceforge.net/optipng/optipng-0.7.7.tar.gz"
+
+    version('0.7.7', sha256='4f32f233cef870b3f95d3ad6428bfe4224ef34908f1b42b0badf858216654452')