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POHow to enforce required command-line options with NDesk.Options?
 

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  1. POHow to enforce required command-line options with NDesk.Options?
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    <p>I was just writing a console utility and decided to use NDesk.Options for command-line parsing. My question is, How do I enforce required command-line options?</p> <p>I see in the <a href="http://www.ndesk.org/Options" rel="nofollow noreferrer">docs</a> that:</p> <blockquote> <p>options with a required value (append '=' to the option name) or an optional value (append ':' to the option name).</p> </blockquote> <p>However, when I put a <code>=</code> at the end of the option name there is no difference in behavior. Ideally the Parse method would throw an exception.</p> <p>Is there something else I need to do?</p> <p>Here is my test code:</p> <pre><code>class Program { static void Main(string[] args) { bool show_help = false; string someoption = null; var p = new OptionSet() { { "someoption=", "Some String Option", v =&gt; someoption = v}, { "h|help", "show this message and exit", v =&gt; show_help = v != null } }; List&lt;string&gt; extra; try { extra = p.Parse(args); } catch (OptionException e) { System.Console.Write("myconsole: "); System.Console.WriteLine(e.Message); System.Console.WriteLine("Try `myconsole --help' for more information."); return; } if (show_help) { ShowHelp(p); return; } System.Console.WriteLine("=================="); System.Console.WriteLine(someoption); } static void ShowHelp(OptionSet p) { System.Console.WriteLine("Usage: myconsole [OPTIONS]"); System.Console.WriteLine(); System.Console.WriteLine("Options:"); p.WriteOptionDescriptions(System.Console.Out); } } </code></pre>
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    1. COI have the same problem. Seams NDesk.Options won't throw exception.
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      1. USBogdan Kanivets
 

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