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January 13, 2019 20:57
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parsing args in dotnet core
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public static void Main(string[] args) | |
{ | |
var app = new Microsoft.Extensions.CommandLineUtils.CommandLineApplication(); | |
var catapult = app.Command("catapult", config => { | |
config.OnExecute(()=>{ | |
config.ShowHelp(); //show help for catapult | |
return 1; //return error since we didn't do anything | |
}); | |
config.HelpOption("-? | -h | --help"); //show help on --help | |
}); | |
catapult.Command("help", config => { | |
config.Description = "get help!"; | |
config.OnExecute(()=>{ | |
catapult.ShowHelp("catapult"); | |
return 1; | |
}); | |
}); | |
catapult.Command("list", config => { | |
config.Description = "list catapults"; | |
config.HelpOption("-? | -h | --help"); | |
config.OnExecute(()=>{ | |
Console.WriteLine("a"); | |
Console.WriteLine("b"); | |
return 0; | |
}); | |
}); | |
catapult.Command("add", config => { | |
config.Description = "Add a catapult"; | |
config.HelpOption("-? | -h | --help"); | |
var arg = config.Argument("name", "name of the catapult", false); | |
config.OnExecute(()=>{ | |
if(!string.IsNullOrWhiteSpace(arg.Value)) | |
{ | |
//add snowballs somehow | |
Console.WriteLine($"added {arg.Value}"); | |
return 0; | |
} | |
return 1; | |
}); | |
}); | |
catapult.Command("fling", config =>{ | |
config.Description = "fling snow"; | |
config.HelpOption("-? | -h | --help"); | |
var ball = config.Argument("snowballId", "snowball id", false); | |
var cata = config.Argument("catapultId", "id of catapult to use", false); | |
config.OnExecute(()=>{ | |
//actually do something | |
Console.WriteLine($"threw snowball: {ball.Value} with {cata.Value}"); | |
return 0; | |
}); | |
}); | |
var snowball = app.Command("snowball", config => { | |
config.OnExecute(()=>{ | |
config.ShowHelp(); //show help for catapult | |
return 1; //return error since we didn't do anything | |
}); | |
config.HelpOption("-? | -h | --help"); //show help on --help | |
}); | |
snowball.Command("help", config => { | |
config.Description = "get help!"; | |
config.OnExecute(()=>{ | |
catapult.ShowHelp("snowball"); | |
return 1; | |
}); | |
}); | |
snowball.Command("list", config => { | |
config.HelpOption("-? | -h | --help"); | |
config.Description = "list snowballs"; | |
config.OnExecute(()=>{ | |
Console.WriteLine("1"); | |
Console.WriteLine("2"); | |
return 0; | |
}); | |
}); | |
snowball.Command("add", config => { | |
config.Description = "Add a snowball"; | |
config.HelpOption("-? | -h | --help"); | |
var arg = config.Argument("name", "name of the snowball", false); | |
config.OnExecute(()=>{ | |
if(!string.IsNullOrWhiteSpace(arg.Value)) | |
{ | |
//add snowballs somehow | |
Console.WriteLine($"added {arg.Value}"); | |
return 0; | |
} | |
return 0; | |
}); | |
}); | |
//give people help with --help | |
app.HelpOption("-? | -h | --help"); | |
var result = app.Execute(args); | |
Environment.Exit(result); | |
} |
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