Add a script to check Jenkins plugins updates

README.md

@@ -8,6 +8,7 @@
     * [Fiber Channel](#fiber_channel)
     * [Grav](#grav)
     * [Sesame2mail](#sesame2mail)
+    * [Jenkins](#jenkins)
     * [WordPress](#wordpress)
 
 
@@ -79,6 +80,18 @@ The first argument can be :
 * A file with a list of user ID (sesame), one per line.
 * A user ID (sesame), only one.
 
+### Jenkins
+
+#### jenkins_check_update
+
+A daily cron to check [Jenkins][jenkins website]'s plugins updates.
+  * It need [jenkins-cli.jar][jenkins cli].
+  * If an update is available, it will create an empty file (${JENKINS_HOME}/.update_plugin), else it will ensure the "update" file is absent.
+    * Be sure to monitore if this file **${JENKINS_HOME}/.update_plugin** exist !
+
+[jenkins website]: https://jenkins.io/
+[jenkins cli]: https://jenkins.io/doc/book/managing/cli/#downloading-the-client
+
 ### WordPress
 
 #### wordpress_cron

jenkins_check_update

@@ -0,0 +1,39 @@
+#!/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 (${JENKINS_AUTH_FILE}) does not seem to be available."
+	exit 1
+fi
+
+# Verify if updates are availables for plugins
+if java -jar "${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
+
+exit 0