Reduce duplicate code in each init phase

Signed-off-by: 1000TurquoisePogs <[email protected]>

bin/commands/init/mvs/index.sh

@@ -62,11 +62,22 @@ while read -r line; do
     else
       print_error_and_exit "Error ZWEL0157E: ${name} (zowe.setup.dataset.${key}) is not defined in Zowe YAML configuration file." "" 157
     fi
-  elif [ "${key}" = "authLoadlib" ]; then
-    if [ "${ds}" = "${prefix}.SZWESAMP" ]; then
+  fi
+
+  if [ "${key}" = "authLoadlib" ]; then
+    if [ "${ds}" = "${prefix}.SZWEAUTH" ]; then
       run_aloadlib_create="false"
     else
       run_aloadlib_create="true"
+      # check existence
+      ds_existence=$(is_data_set_exists "${ds}")
+      if [ "${ds_existence}" = "true" ]; then
+        if [ "${ZWE_CLI_PARAMETER_ALLOW_OVERWRITE}" = "true" ]; then
+          print_message "Warning ZWEL0300W: ${ds} already exists. Members in this data set will be overwritten."
+        else
+          print_message "Warning ZWEL0301W: ${ds} already exists and will not be overwritten. For upgrades, you must use --allow-overwrite."
+        fi
+      fi       
     fi
   fi
 

bin/libs/zos.sh

@@ -75,6 +75,7 @@ verify_generated_jcl() {
     result=$(zwecli_inline_execute_command init generate)
   fi
 
+  # should be created, but may take time to discover.
   if [ -z "${does_jcl_exist}" ]; then
     does_jcl_exist=
     for secs in 1 5 10 ; do