Add clean up script

Change-Id: I0771d132568ed31f1b29e710f836ed5342f551d0
Signed-off-by: Frederic Gurr <frederic.gurr@eclipse-foundation.org>

nextReleaseUtils/clean_up_old_builds.sh

diff --git a/nextReleaseUtils/clean_up_old_builds.sh b/nextReleaseUtils/clean_up_old_builds.sh
new file mode 100755
index 0000000..d5e09ca
--- /dev/null
+++ b/nextReleaseUtils/clean_up_old_builds.sh
@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+
+#*******************************************************************************
+# Copyright (c) 2021 Eclipse Foundation and others.
+# This program and the accompanying materials are made available
+# under the terms of the Eclipse Public License 2.0
+# which is available at http://www.eclipse.org/legal/epl-v20.html,
+# or the MIT License which is available at https://opensource.org/licenses/MIT.
+# SPDX-License-Identifier: EPL-2.0 OR MIT
+#*******************************************************************************
+
+# This script creates the metadata files for a p2repo at the beginning of a release cycle.
+# It pre-populates the composite repository with the content of the last release.
+# last_release_dir can be specified with a relative path (e.g. '../2019-03/201903201000') or absolute
+# (e.g. 'https://download.eclipse.org/releases/2019-03/201903201000').
+
+# Bash strict-mode
+set -o errexit
+set -o nounset
+set -o pipefail
+
+IFS=$'\n\t'
+
+release_name=${1:-}
+
+releases_root_dir="/home/data/httpd/download.eclipse.org/releases"
+release_dir="${releases_root_dir}/${release_name}"
+
+ssh_remote="genie.simrel@projects-storage.eclipse.org"
+
+if [[ -z "${release_name}" ]]; then
+ printf "ERROR: a release name must be given.\n"
+ exit 1
+fi
+
+# compare location in compositeContent.jar and latest release dir 
+release_in_composite_jar="$(ssh ${ssh_remote} unzip -p "${release_dir}/compositeContent.jar" "compositeContent.xml" | grep 'child location' | grep -v 'epp' | sed "s/.*='//" | sed "s/'.*//")"
+latest_release_dir="$(ssh ${ssh_remote} find "${release_dir}" -maxdepth 1 -type d -name '20*' | sort | tail -n 1)"
+latest_release_dir="$(basename "${latest_release_dir}")"
+
+if [[ "${release_in_composite_jar}" == "${latest_release_dir}" ]]; then
+  echo "Location in compositeContent.jar and latest release dir match: ${latest_release_dir}"
+else
+  echo "ERROR: Location in compositeContent.jar and latest release dir do not match:"
+  echo "  compositeContent.jar: ${release_in_composite_jar}" 
+  echo "  Latest release dir:   ${latest_release_dir}"
+fi 
+
+ssh ${ssh_remote} /bin/bash << EOF
+# find and delete all release dirs EXCEPT the last one
+for dir in \$(find ${release_dir}/* -maxdepth 1 -type d -name '20*' | sort | head -n -1); do
+  echo "Removing \${dir}..."
+  rm -rf "\${dir}"
+done
+
+# remove milestone and release candidate composite jars
+for rel in M1 M2 M3 RC1 RC2; do
+ echo "Removing composite jars for \${rel}..."
+ rm -f "${release_dir}/compositeArtifacts\${rel}.jar"
+ rm -f "${release_dir}/compositeContent\${rel}.jar"
+done
+EOF
+
+echo "Done."
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