add version check to jenkins pipeline

Jenkinsfile

@@ -9,6 +9,8 @@ pipeline {
 
     environment {
         BLUE_OCEAN_URL = "https://jenkins.ozg-sh.de/blue/organizations/jenkins/goofy/detail/${env.BRANCH_NAME}/${env.BUILD_NUMBER}/pipeline"
+        RELEASE_REGEX = /\d+.\d+.\d+/
+        SNAPSHOT_REGEX = /\d+.\d+.\d+-SNAPSHOT/
     }
 
     options {
@@ -18,6 +20,35 @@ pipeline {
     }
 
     stages {
+        stage('Check Version') {
+            steps {
+                script {
+                    FAILED_STAGE = env.STAGE_NAME
+                    def rootPom = readMavenPom file: 'pom.xml'
+                    def rootVersion = rootPom.version
+
+                    def serverPom = readMavenPom file: 'goofy-server/pom.xml'
+                    def serverVersion = serverPom.parent.version
+
+                    def clientPom = readMavenPom file: 'goofy-client/pom.xml'
+                    def clientVersion = clientPom.parent.version
+
+                    if(env.BRANCH_NAME == 'release'){
+                        if ( !(rootVersion ==~ RELEASE_REGEX) || !(serverVersion ==~ RELEASE_REGEX) || !(clientVersion ==~ RELEASE_REGEX)) {
+                            error("Keine Release Version für Branch ${env.BRANCH_NAME}.")
+                        }
+                    } else {
+                        if ( !(rootVersion ==~ SNAPSHOT_REGEX) || !(serverVersion ==~ SNAPSHOT_REGEX) || !(clientVersion ==~ SNAPSHOT_REGEX)) {
+                            error("Keine Snapshot Version für Branch ${env.BRANCH_NAME}.")
+                        }
+                    }
+                    
+                    if( !(rootVersion == serverVersion && rootVersion == clientVersion)){
+                        error("Versionen sind nicht identisch")                        
+                    }
+                }
+            }
+        }
         stage('Client') {
             steps {
                 container("nodejs"){