erik/dcat
erik/dcat
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Cleaned up errors reporting.

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This commit is contained in:
Erik C. Thauvin 2021-10-16 14:59:09 -07:00
parent 96b4784fc8
commit 293a29c7a2
5 changed files with 44 additions and 47 deletions
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18
bin/dcat.dart
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@ -22,6 +22,8 @@ const showTabsFlag = 'show-tabs';
const squeezeBlank = 'squeeze-blank';
const versionFlag = 'version';
const _homePage = 'https://github.com/ethauvin/dcat';
/// Concatenates files specified in [arguments].
///
/// Usage: `dcat [option] [file]…`
@ -33,8 +35,9 @@ Future<int> main(List<String> arguments) async {
try {
argResults = parser.parse(arguments);
} on FormatException catch (e) {
return printError(
await printError(
"${e.message}\nTry '$appName --$helpFlag' for more information.");
return exitFailure;
}
if (argResults[helpFlag]) {
@ -121,20 +124,19 @@ Future<ArgParser> setupArgsParser() async {
return parser;
}
/// Prints the error [message] to [stderr].
Future<int> printError(String message) async {
/// Prints an error [message] to [stderr].
Future<void> printError(String message) async {
stderr.writeln("$appName: $message");
return exitFailure;
}
/// Prints the version info.
Future<int> printVersion() async {
print('''$appName (Dart cat) $appVersion
Copyright (C) 2021 Erik C. Thauvin
License: 3-Clause BSD <https://opensource.org/licenses/BSD-3-Clause>
License 3-Clause BSD: <https://opensource.org/licenses/BSD-3-Clause>
Inspired by <https://dart.dev/tutorials/server/cmdline>
Written by Erik C. Thauvin <https://erik.thauvin.net/>''');
Written by Erik C. Thauvin <https://erik.thauvin.net/>
Source: $_homePage''');
return exitSuccess;
}
@ -150,6 +152,6 @@ Examples:
$appName f - g Output f's contents, then standard input, then g's contents.
$appName Copy standard input to standard output.
Source and documentation: <https://github.com/ethauvin/dcat>''');
Source and documentation: <$_homePage>''');
return exitSuccess;
}