42 lines
1.0 KiB
Markdown
42 lines
1.0 KiB
Markdown
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which [](https://pub.dartlang.org/packages/which) [](https://travis-ci.org/dart-lang/which) [](https://coveralls.io/r/dart-lang/which)
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=====
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Check for and locate installed executables. Just like unix [which(1)][unix_which], except:
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* Doesn't shell out (fast).
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* Cross-platform (works on windows).
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## Install
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```shell
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pub global activate den
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den install which
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```
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## Usage
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```dart
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import 'dart:io';
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import 'package:which/which.dart';
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main(arguments) async {
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// Asynchronously
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var git = await which('git', orElse: () => null);
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// Or synchronously
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var git = whichSync('git', orElse: () => null);
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if (git == null) {
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print('Please install git and try again');
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exit(1);
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}
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await Process.run(git, ['add', '-A']);
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await Process.run(git, ['commit', '-m', arguments.first]);
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}
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```
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[unix_which]: http://en.wikipedia.org/wiki/Which_%28Unix%29
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