added download_cassandra.sh

setup/download_cassandra.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+#  vim:ts=4:sts=4:sw=4:et
+#
+#  Author: Hari Sekhon
+#  Date: 2020-04-28 15:39:09 +0100 (Tue, 28 Apr 2020)
+#
+#  https://github.com/harisekhon/bash-tools
+#
+#  License: see accompanying Hari Sekhon LICENSE file
+#
+#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
+#
+#  https://www.linkedin.com/in/harisekhon
+#
+
+# Installs Java and downloads Cassandra to $PWD
+
+set -euo pipefail
+[ -n "${DEBUG:-}" ] && set -x
+srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# shellcheck disable=SC1090
+#. "$srcdir/bash-tools/lib/utils.sh"
+
+if ! type -P wget &>/dev/null ||
+     type -P apk; then  # Alpine built-in wget isn't good enough
+    "$srcdir/../install_packages.sh" wget
+fi
+
+#/usr/lib/jvm/jre/bin/
+if ! type -P java &>/dev/null; then
+    "$srcdir/install_java.sh"
+fi
+
+CASSANDRA_VERSION="${CASSANDRA_VERSION:-3.11.4}"
+
+TAR="apache-cassandra-$CASSANDRA_VERSION-bin.tar.gz"
+
+url="http://www.apache.org/dyn/closer.lua?filename=cassandra/$CASSANDRA_VERSION/$TAR&action=download"
+
+url_archive="http://archive.apache.org/dist/cassandra/$CASSANDRA_VERSION/$TAR"
+
+echo "Downloading Cassandra tarball:"
+# --max-redirect - some apache mirrors redirect a couple times and give you the latest version instead
+#                  but this breaks stuff later because the link will not point to the right dir
+#                  (and is also the wrong version for the tag)
+wget -t 10 --max-redirect 1 --retry-connrefused -O "$TAR" "$url" || \
+wget -t 10 --max-redirect 1 --retry-connrefused -O "$TAR" "$url_archive"
+
+echo "Extracting tarball:"
+tar zxf "$TAR"
+
+echo "Removing tarball:"
+rm -fv "$TAR"
+
+# check tarball was extracted to the right place, helps ensure it's the right version and the link will work
+if ! test -d "apache-cassandra-$CASSANDRA_VERSION"; then
+    echo "apache-cassandra-$CASSANDRA_VERSION directory not found from extracted tarball!"
+    exit 1
+fi
+
+echo "Symlinking cassandra:"
+ln -sv "apache-cassandra-$CASSANDRA_VERSION" cassandra
+
+if [ -f /.dockerenv ]; then
+    echo "Running inside docker, removing docs:"
+    rm -rf cassandra/doc cassandra/javadoc
+fi