py-uproot4: added new package at v0.0.27 (#18891)

var/spack/repos/builtin/packages/py-uproot4/package.py

@@ -0,0 +1,39 @@
+# 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)
+
+from spack import *
+
+
+class PyUproot4(PythonPackage):
+    """ROOT I/O in pure Python and NumPy."""
+
+    homepage = "https://uproot4.readthedocs.io"
+    git      = "https://github.com/scikit-hep/uproot4"
+    url      = "https://github.com/scikit-hep/uproot4/archive/0.0.27.tar.gz"
+
+    maintainers = ['vvolkl']
+
+    version('master', branch='master')
+    version('0.0.27', sha256='de87555937332998b476f3e310392962bc983bddc008ed2b3c07a25c0379c4c9')
+
+    variant('xrootd', default=True,
+            description='Build with xrootd support ')
+    variant('lz4', default=True,
+            description='Build with support for reading '
+                        'lz4-compressed rootfiles ')
+
+    variant('zstd', default=True,
+            description='Build with support for reading '
+                        'zstd-compressed rootfiles ')
+
+    depends_on('py-setuptools', type='build')
+    depends_on('py-numpy', type=('build', 'run'))
+
+    depends_on('xrootd', when="+xrootd")
+
+    depends_on('lz4', when="+lz4")
+    depends_on('xxhash', when="+lz4")
+
+    depends_on('zstd', when="+zstd")