scripts/app/jenkins_check_update

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#!/bin/sh
# This script do the following:
# Use jenkins-cli.jar
# Verify if an update is available for Jenkins plugins.
# Create a file you need to monitore.
#
# How-to use it?
# Run it with `jenkins_check_update
# Add a symlink to /etc/cron.daily
# ln -s $(pwd)/jenkins_check_update /etc/cron.daily/
JENKINS_HOME="/var/lib/jenkins"
JENKINS_CLI_JAR="${JENKINS_HOME}/war/WEB-INF/jenkins-cli.jar"
JENKINS_AUTH_FILE="/root/.jenkins.auth"
JENKINS_PLUGIN_UPDATE_LOG="${JENKINS_HOME}/.update_plugin"
if [ ! -f "${JENKINS_CLI_JAR}" ]; then
printf '%b\n' "Jenkins-cli (${JENKINS_CLI_JAR}) does not seem to be available."
exit 1
fi
if [ ! -f "${JENKINS_AUTH_FILE}" ]; then
printf '%b\n' "Jenkins authentication file (${JENKINS_AUTH_FILE}) does not seem to be available."
exit 1
fi
cd "$(dirname ${JENKINS_AUTH_FILE})" || exit
# Verify if updates are availables for plugins
if java -jar "${JENKINS_CLI_JAR}" -s http://127.0.0.1:8080 -auth @.jenkins.auth list-plugins | grep -i -q -- "(.*)$"
then
touch "${JENKINS_PLUGIN_UPDATE_LOG}"
#printf '%b\n' "Please upgrade plugins"
else
rm -f -- "${JENKINS_PLUGIN_UPDATE_LOG}"
#printf '%b\n' "Nothing to do"
fi
cd - > /dev/null || exit
exit 0