Conform to function declaration standards

- declare desc variable
- declare all positional arguments
- set the cmd
- properly handle DOKKU_APP_NAME

subcommands/clone

@@ -5,11 +5,14 @@ source "$PLUGIN_BASE_PATH/common/functions"
 source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/functions"
 
 mysql-clone-cmd() {
-  [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
-  [[ -z $3 ]] && dokku_log_fail "Please specify a name for the new service"
-  verify_service_name "$2"
-  SERVICE="$2"
-  NEW_SERVICE="$3"
+  declare desc="create container <new-name> then copy data from <name> into <new-name>"
+  local cmd="$PLUGIN_COMMAND_PREFIX:clone" argv=("$@"); [[ ${argv[0]} == "$cmd" ]] && shift 1
+  declare SERVICE="$1" NEW_SERVICE="$2"
+
+  [[ -z "$SERVICE" ]] && dokku_log_fail "Please specify a name for the service"
+  [[ -z "$NEW_SERVICE" ]] && dokku_log_fail "Please specify a name for the new service"
+
+  verify_service_name "$SERVICE"
   dokku "$PLUGIN_COMMAND_PREFIX:create" "$NEW_SERVICE"
   dokku_log_info1 "Copying data from $SERVICE to $NEW_SERVICE"
   dokku "$PLUGIN_COMMAND_PREFIX:export" "$SERVICE" | dokku "$PLUGIN_COMMAND_PREFIX:import" "$NEW_SERVICE" > /dev/null 2>&1 || true