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).
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());
}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();
}Please file feature requests and bugs at the issue tracker.
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