commit	352a8f82496359a3bb9cbbedafeef072d464ba4c	[log] [tgz]
author	Devon Carew <devoncarew@google.com>	Wed May 16 14:25:51 2018 -0700
committer	GitHub <noreply@github.com>	Wed May 16 14:25:51 2018 -0700
tree	d1fe137770ae4d883f88f78ac979bad1eab779e9
parent	f1becff6d2a844f0b4426701c4a34fc93faf3f95 [diff]
parent	e838ecb806e917e43d35689372460c226c86f955 [diff]

tree: d1fe137770ae4d883f88f78ac979bad1eab779e9

README.md

cli_util

A library to help in building Dart command-line apps.

In particular, cli_util provides a simple, standardized way to get the current SDK directory. Useful, especially, when building client applications that interact with the Dart SDK (such as the analyzer).

Locating the Dart SDK

import 'dart:io';

import 'package:cli_util/cli_util.dart';
import 'package:path/path.dart' as path;

main(args) {
  // Get sdk dir from cli_util.
  String sdkPath = getSdkPath();
  
  // Do stuff... For example, print version string
  File versionFile = new File(path.join(sdkPath, 'version'));
  print(versionFile.readAsStringSync());
}

Displaying output and progress

package:cli_util can also be used to help CLI tools display output and progress. It has a logging mechanism which can help differentiate between regular tool output and error messages, and can facilitate having a more verbose (-v) mode for output.

In addition, it can display an indeterminate progress spinner for longer running tasks, and optionally display the elapsed time when finished:

import 'package:cli_util/cli_logging.dart';

main(List<String> args) async {
  bool verbose = args.contains('-v');
  Logger logger = verbose ? new Logger.verbose() : new Logger.standard();

  logger.stdout('Hello world!');
  logger.trace('message 1');
  await new Future.delayed(new Duration(milliseconds: 200));
  logger.trace('message 2');
  logger.trace('message 3');

  Progress progress = logger.progress('doing some work');
  await new Future.delayed(new Duration(seconds: 2));
  progress.finish(showTiming: true);

  logger.stdout('All ${logger.ansi.emphasized('done')}.');
  logger.flush();
}

Features and bugs

Please file feature requests and bugs at the issue tracker.