57 lines
1.3 KiB
Dart
57 lines
1.3 KiB
Dart
import 'package:args/args.dart';
|
|
|
|
const String version = '0.0.1';
|
|
|
|
ArgParser buildParser() {
|
|
return ArgParser()
|
|
..addFlag(
|
|
'help',
|
|
abbr: 'h',
|
|
negatable: false,
|
|
help: 'Print this usage information.',
|
|
)
|
|
..addFlag(
|
|
'verbose',
|
|
abbr: 'v',
|
|
negatable: false,
|
|
help: 'Show additional command output.',
|
|
)
|
|
..addFlag('version', negatable: false, help: 'Print the tool version.');
|
|
}
|
|
|
|
void printUsage(ArgParser argParser) {
|
|
print('Usage: dart dew.dart <flags> [arguments]');
|
|
print(argParser.usage);
|
|
}
|
|
|
|
void main(List<String> arguments) {
|
|
final ArgParser argParser = buildParser();
|
|
try {
|
|
final ArgResults results = argParser.parse(arguments);
|
|
bool verbose = false;
|
|
|
|
// Process the parsed arguments.
|
|
if (results.flag('help')) {
|
|
printUsage(argParser);
|
|
return;
|
|
}
|
|
if (results.flag('version')) {
|
|
print('dew version: $version');
|
|
return;
|
|
}
|
|
if (results.flag('verbose')) {
|
|
verbose = true;
|
|
}
|
|
|
|
// Act on the arguments provided.
|
|
print('Positional arguments: ${results.rest}');
|
|
if (verbose) {
|
|
print('[VERBOSE] All arguments: ${results.arguments}');
|
|
}
|
|
} on FormatException catch (e) {
|
|
// Print usage information if an invalid argument was provided.
|
|
print(e.message);
|
|
print('');
|
|
printUsage(argParser);
|
|
}
|
|
}
|