Единый класс для парсинга версий из XML

vars/sonarScanner.groovy

@@ -11,8 +11,7 @@ def call(String rootFile = 'src/cf/Configuration.xml') {
     String scannerHome = tool config.sonarScannerToolName
     sonarCommand = "$scannerHome/bin/sonar-scanner -Dsonar.branch.name=$env.BRANCH_NAME"
 
-    def configurationText = readFile encoding: 'UTF-8', file: rootFile
-    String configurationVersion = version(configurationText)
+    String configurationVersion = versionParser.configuration(rootFile)
     if (configurationVersion) {
         sonarCommand += " -Dsonar.projectVersion=$configurationVersion"
     }

vars/versionParser.groovy

@@ -0,0 +1,17 @@
+import com.cloudbees.groovy.cps.NonCPS
+
+def configuration(rootFile = 'src/cf/Configuration.xml') {
+    def configurationText = readFile encoding: 'UTF-8', file: rootFile
+    return version(configurationText, /<Version>(.*)<\/Version>/)
+}
+
+def storage(versionFile = 'src/cf/VERSION') {
+    storageVersionText = readFile encoding: 'UTF-8', file: versionFile
+    return version(versionFile, /<VERSION>(.*)<\/VERSION>/)
+}
+
+@NonCPS
+private static String version(String text, String regexp) {
+    def matcher = text =~ regexp
+    return matcher ? matcher.group(1) : ""
+}