Update Jenkinsfile

Jenkinsfile

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+#!/usr/bin/env groovy
+// see https://jenkins.io/doc/book/pipeline/syntax/
+
+pipeline {
+	environment {
+		MVN_SET = credentials('maven_settings')
+		JAVA_TOOL_OPTIONS = '-Duser.home=/var/maven'
+	}
+	agent any
+	triggers {
+		pollSCM "* * * * *"
+	}
+	options {
+		timestamps()
+		ansiColor("xterm")
+	}
+	parameters {
+		booleanParam(name: "RELEASE",
+			description: "Build a release from current commit.",
+			defaultValue: false)
+	}
+	stages {
+		stage("Build & Deploy SNAPSHOT") {
+			agent {
+				docker {
+					image 'maven:3.6.3'
+					args '-v $HOME:/var/maven'
+					reuseNode true
+				}
+			}
+			steps {
+				sh "mvn -s $MVN_SET -B deploy"
+			}
+		}
+
+		stage("Release") {
+			agent {
+				docker {
+					image 'maven:3.6.3'
+					args '-v $HOME:/var/maven'
+					reuseNode true
+				}
+			}
+			when {
+				expression { params.RELEASE }
+			}
+			steps {
+				sh "mvn -s $MVN_SET -DpushChanges=false -DlocalCheckout=true -DpreparationGoals=initialize release:prepare release:perform -B"
+			}
+		}
+	}
+	post {
+		always {
+			/* clean up directory */
+			deleteDir()
+		}
+	}
+}