90 lines
2.4 KiB
C#
90 lines
2.4 KiB
C#
// Sub-commands with Mono.Options.CommandSet
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//
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// Compile as:
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// mcs -r:Mono.Options.dll commands.cs
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using System;
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using System.Collections.Generic;
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using Mono.Options;
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class CommandDemo {
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public static int Main (string[] args)
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{
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var commands = new CommandSet ("commands") {
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"usage: commands COMMAND [OPTIONS]",
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"",
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"Mono.Options.CommandSet sample app.",
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"",
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"Global options:",
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{ "v:",
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"Output verbosity.",
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(int? n) => Verbosity = n.HasValue ? n.Value : Verbosity + 1 },
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"",
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"Available commands:",
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new Command ("echo", "Echo arguments to the screen") {
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Run = ca => Console.WriteLine ("{0}", string.Join (" ", ca)),
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},
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new RequiresArgsCommand (),
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"Commands with spaces are supported:",
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new Command ("has spaces", "spaces?!") {
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Run = ca => Console.WriteLine ("spaces, yo! {0}", string.Join (" ", ca)),
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},
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"Nested CommandSets are also supported. They're invoked similarly to commands with spaces.",
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new CommandSet ("set") {
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new Command ("file type", "Does something or other.") {
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Run = ca => Console.WriteLine ("File type set to: {0}", string.Join (" ", ca)),
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},
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},
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};
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commands.Add (commands);
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return commands.Run (args);
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}
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public static int Verbosity;
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}
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class RequiresArgsCommand : Command {
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public RequiresArgsCommand ()
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: base ("requires-args", "Class-based Command subclass")
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{
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Options = new OptionSet () {
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"usage: commands requires-args [OPTIONS]",
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"",
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"Class-based Command subclass example.",
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{ "name|n=",
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"{name} of person to greet.",
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v => Name = v },
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{ "help|h|?",
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"Show this message and exit.",
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v => ShowHelp = v != null },
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};
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}
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public bool ShowHelp {get; private set;}
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public new string Name {get; private set;}
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public override int Invoke (IEnumerable<string> args)
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{
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try {
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var extra = Options.Parse (args);
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if (ShowHelp) {
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Options.WriteOptionDescriptions (CommandSet.Out);
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return 0;
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}
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if (string.IsNullOrEmpty (Name)) {
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Console.Error.WriteLine ("commands: Missing required argument `--name=NAME`.");
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Console.Error.WriteLine ("commands: Use `commands help requires-args` for details.");
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return 1;
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}
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Console.WriteLine ($"Hello, {Name}!");
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return 0;
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}
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catch (Exception e) {
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Console.Error.WriteLine ("commands: {0}", CommandDemo.Verbosity >= 1 ? e.ToString () : e.Message);
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return 1;
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}
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}
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}
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