add new package : kafka (#14315)

* add new package : kafka

* move url_for_version after depens_on()

* refine list_depth for kafka

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

@@ -0,0 +1,35 @@
+# 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 Kafka(Package):
+    """
+    Kafka is used for building real-time data pipelines and streaming apps.
+    It is horizontally scalable, fault-tolerant, wicked fast, and runs in
+    production in thousands of companies.
+    """
+
+    homepage = "https://www-eu.apache.org/dist/kafka"
+    url      = "https://www-eu.apache.org/dist/kafka/2.3.1/kafka_2.12-2.3.1.tgz"
+    list_url = "https://www-eu.apache.org/dist/kafka/"
+    list_depth = 1
+
+    version('2.13-2.4.0', sha256='c1c5246c7075459687b3160b713a001f5cd1cc563b9a3db189868d2f22aa9110')
+    version('2.12-2.4.0', sha256='b9582bab0c3e8d131953b1afa72d6885ca1caae0061c2623071e7f396f2ccfee')
+    version('2.12-2.3.1', sha256='5a3ddd4148371284693370d56f6f66c7a86d86dd96c533447d2a94d176768d2e')
+    version('2.12-2.3.0', sha256='d86f5121a9f0c44477ae6b6f235daecc3f04ecb7bf98596fd91f402336eee3e7')
+    version('2.12-2.2.2', sha256='7a1713d2ee929e54b1c889a449d77006513e59afb3032366368b2ebccd9e9ec0')
+
+    depends_on('java@8:', type='run')
+
+    def url_for_version(self, version):
+        url = "https://www-eu.apache.org/dist/kafka/{0}/kafka_{1}.tgz"
+        parent_dir = str(version).split('-')[1]
+        return url.format(parent_dir, version)
+
+    def install(self, spec, prefix):
+        install_tree('.', prefix)