private static void ensureRootFilesConfigured(
RootFilesProperties rootProperties, ConfigSpec configuration) {
if (rootProperties.getFileMap().keySet().size() == 0) {
String message;
if (configuration.equals(ConfigSpec.GLOBAL)) {
message = "Cannot set permissions or symbolic links if there are no root files";
} else {
message =
"Cannot set permissions or symbolic links for "
+ configuration.toOsString()
+ " if there are no root files for that configuration";
}
throw new IllegalArgumentException(message);
}
}
