Use Jenkins Plugin Installation manager for showing updates

.gitignore

@@ -1 +1,11 @@
 Jenkins Config As Code Example.iml
+
+# Plugin installation manager dev tools
+jenkins-plugin-manager-*.jar
+tmp/
+
+# IDE
+.classpath
+.project
+.settings
+.factorypath

Dockerfile

@@ -1,11 +1,15 @@
-FROM jenkins/jenkins:2.164.1
+ARG JENKINS_VERSION=2.238
+FROM jenkins/jenkins:$JENKINS_VERSION
 MAINTAINER Oleg Nenashev <o.v.nenashev@gmail.com>
 LABEL Description="This demo shows how to setup Jenkins Config-as-Code with Docker, Pipeline, and Groovy Hook Scripts" Vendor="Oleg Nenashev" Version="0.2"
 
+# Plugin Installation Manager
+ARG PLUGIN_MANAGER_TOOL_VERSION=1.0.2
+RUN wget https://github.com/jenkinsci/plugin-installation-manager-tool/releases/download/plugin-management-parent-pom-$PLUGIN_MANAGER_TOOL_VERSION/jenkins-plugin-manager-$PLUGIN_MANAGER_TOOL_VERSION.jar -O /usr/share/jenkins/ref/jenkins-plugin-manager.jar
+
 ENV JENKINS_UC_EXPERIMENTAL=https://updates.jenkins.io/experimental
 COPY plugins.txt /usr/share/jenkins/ref/plugins.txt
-COPY download-and-check-updates.sh /usr/local/bin/download-and-check-updates.sh
-RUN /usr/local/bin/download-and-check-updates.sh < /usr/share/jenkins/ref/plugins.txt
+RUN /usr/local/bin/install-plugins.sh < /usr/share/jenkins/ref/plugins.txt
 
 COPY init_scripts/src/main/groovy/ /usr/share/jenkins/ref/init.groovy.d/
 

Makefile

@@ -1,3 +1,6 @@
+PLUGIN_MANAGER_TOOL_VERSION=1.0.2
+JENKINS_VERSION=2.238
+
 build:
 	docker build -t onenashev/demo-jenkins-config-as-code .
 
@@ -6,3 +9,18 @@ run:
 
 debug:
 	docker run --rm --name ci-jenkins-io-dev -e DEBUG=true -p 5005:5005 -v maven-repo:/root/.m2 -v ${MY_PIPELINE_LIBRARY_DIR}:/var/jenkins_home/pipeline-library -v ${MY_OTHER_PIPELINE_LIBS_DIRS}:/var/jenkins_home/pipeline-libs -e DEV_HOST=${CURRENT_HOST} -p 8080:8080 -p 50000:50000  onenashev/demo-jenkins-config-as-code
+
+clean:
+	rm -rf tmp
+
+tmp/jenkins.war:
+	wget https://repo.jenkins-ci.org/releases/org/jenkins-ci/main/jenkins-war/${JENKINS_VERSION}/jenkins-war-${JENKINS_VERSION}.war -O tmp/jenkins.war
+	touch tmp/jenkins.war
+
+tmp/jenkins-plugin-manager.jar:
+	wget https://github.com/jenkinsci/plugin-installation-manager-tool/releases/download/plugin-management-parent-pom-${PLUGIN_MANAGER_TOOL_VERSION}/jenkins-plugin-manager-${PLUGIN_MANAGER_TOOL_VERSION}.jar -O tmp/jenkins-plugin-manager.jar
+	touch tmp/jenkins-plugin-manager.jar
+
+show-updates: tmp/jenkins-plugin-manager.jar tmp/jenkins.war
+	mkdir -p tmp/plugins
+	java -jar tmp/jenkins-plugin-manager.jar --list -f plugins.txt --no-download -d tmp/plugins -w tmp/jenkins.war --available-updates