Create script to help developers avoid exceeding disk quota on LC

scripts/setup_jacamar_ci.sh

@@ -0,0 +1,64 @@
+#!/bin/bash
+# Redirect Jacamar CI from your HOME directory to your LC workspace and periodically cleanup CI jobs to avoid exceeding
+# disk quota
+#
+# Some things to note:
+# - Running this script on oslic is recommended, because its best suited for file IO
+# - It's important to understand that Cron jobs are installed per node (not per machine!), so do not run this script
+#   more than once unless you know what you're doing.
+# - For more info on Cron, see https://myconfluence.llnl.gov/spaces/RAM/pages/417729120/Cron+-+how+it+can+be+useful+for+triggering+work+at+a+given+time
+
+set -euo pipefail
+
+USER_NAME="$(whoami)"
+HOST_NAME="$(hostname)"
+WORKSPACE_CI_DIR="/usr/workspace/${USER_NAME}/.jacamar-ci"
+HOME_CI_LINK="${HOME}/.jacamar-ci"
+CRON_DIR="${HOME}/crontabs"
+CRON_SCRIPT_PATH="${CRON_DIR}/${HOST_NAME}Cron"
+
+echo "Starting setup for user: ${USER_NAME}"
+echo "Host: ${HOST_NAME}"
+
+# Error checking. Guard against running this script more than once.
+if [ -e "${WORKSPACE_CI_DIR}" ]; then
+  echo "Workspace CI directory already exists at: ${WORKSPACE_CI_DIR}"
+  exit 1
+fi
+if [ -n "$(crontab -l 2>/dev/null)" ] ; then
+  echo "A cron job has already installed on ${HOSTNAME}."
+  exit 1
+fi
+if [ -e "${CRON_DIR}" ]; then
+  echo "Cron directory already exists at: ${CRON_DIR}."
+  echo "If you want to regenerate your Cron job, first log into the specific node that has the job, then delete"
+  echo "it with 'crontab -r'. After that you can safely remove the crontab directory in your HOME directory."
+  exit 1
+fi
+
+# Setup symlink
+echo "Creating symlink: ${HOME_CI_LINK} -> ${WORKSPACE_CI_DIR}"
+rm -rf "${HOME_CI_LINK}"
+mkdir "${WORKSPACE_CI_DIR}"
+ln -s "${WORKSPACE_CI_DIR}" "${HOME_CI_LINK}"
+
+# Setup Cron job
+cron_script_contents() {
+  cat <<EOF
+# This cron job has been installed on $HOST_NAME.
+
+# For more information about using Cron on LC:
+# https://myconfluence.llnl.gov/spaces/RAM/pages/417729120/Cron+-+how+it+can+be+useful+for+triggering+work+at+a+given+time
+
+# Allows you to update your Cron job without having to go to the specific node
+0,20,40 * * * * crontab ${CRON_SCRIPT_PATH}
+
+# Remove contents of Jacamar CI
+0 0 * * * srun -N1 rm -rf ${WORKSPACE_CI_DIR}/*
+EOF
+}
+
+echo "Writing Cron file to: ${CRON_SCRIPT_PATH}"
+mkdir -p "${CRON_DIR}"
+cron_script_contents > "${CRON_SCRIPT_PATH}"
+crontab "${CRON_SCRIPT_PATH}"