// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'dart:io';

import '../../kernel.dart';
import 'command_line_util.dart';

void usage() {
  print("Prints a dill file as a textual format.");
  print("");
  print("Usage: dart <script> dillFile.dill [output]");
  print("");
  print("The first given argument should be an existing file");
  print("that is valid to load as a dill file.");
  print("");
  print("The second argument is optional.");
  print("If given, output will be written to this file.");
  print("If not given, output will be written to standard out.");
  exit(1);
}

void main(List<String> args) {
  CommandLineHelper.requireVariableArgumentCount([1, 2], args, usage);
  CommandLineHelper.requireFileExists(args[0]);
  Component binary = CommandLineHelper.tryLoadDill(args[0]);
  writeComponentToText(
    binary,
    path: args.length > 1 ? args[1] : null,
    showOffsets: const bool.fromEnvironment("showOffsets"),
  );
}