Add archiving

vars/packageStep.groovy

@@ -2,10 +2,20 @@
 
 void call(Map config = [:]) {
     Map defaults = [
+        name: env.BUILD_TAG,
+        archiveCmd: 'tar zcvf',
+        extension: 'tgz',
         artifacts: []
     ]
 
     Map runConfig = defaults + config
 
-    echo "Will tag result as: ${runConfig.tag}"
+    String archiveName = "${runConfig.name}-${runConfig.tag}.${runConfig.extension}"
+
+    echo "Will tag result as: ${archiveName}"
+
+    sh """
+        ${runConfig.archiveCmd} ${archiveName} ${runConfig.artifacts.join(' ')}
+    """
+    archiveArtifacts artifacts: archiveName, followSymlinks: false
 }