DBoW2: add new package (#20387)

var/spack/repos/builtin/packages/dbow2/package.py

@@ -0,0 +1,21 @@
+# Copyright 2013-2020 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)
+
+
+class Dbow2(CMakePackage):
+    """DBoW2 is an improved version of the DBow library, an open source C++
+    library for indexing and converting images into a bag-of-word
+    representation."""
+
+    homepage = "https://github.com/dorian3d/DBoW2"
+    git      = "https://github.com/dorian3d/DBoW2.git"
+
+    version('master', branch='master')
+    version('shinsumicco', git='https://github.com/shinsumicco/DBoW2.git', branch='master')
+
+    depends_on('cmake@3.0:', type='build')
+    depends_on('opencv+calib3d+core+features2d+highgui+imgproc')
+    depends_on('boost')
+    depends_on('dlib')