Announcing CommandLineParser v2.9.0-preview1

[moh-hassan]

CommandLineParser v2.9.0-preview1 is releases Today (july 24, 2020) with new features.
The package can be downloaded from:

C#: https://www.nuget.org/packages/CommandLineParser/2.9.0-preview1
F#: https://www.nuget.org/packages/CommandLineParser.Fsharp/2.9.0-preview1

What is new in that version, read Changelog

The new features:

• Multi-instance option support.
  option can be repeated as:
  $ myprog -t value1 -t value2 -t value3
  Configure Parser as:

    var parser= new Parser(with =>{
			with.AllowMultiInstance =true;
		});

• Move Errors and Value up to the abstract class definition.
  you can extract Options object or Parser Errors from ResultSet:

var result =  parser.ParseArguments<Options>(args);
//extract Options object and errors
Options options= result.Value;
var Errors = result.Errors;

• Add support for flags enums.
  see wiki
• Implement verb aliases.

[Verb("copy", aliases: new string[] { "cp", "cpy" }, HelpText = "Copy some stuff")]
        public class CopyVerb
        {
		//....
	}

You can use verb alias:

$ myprg copy -f file.txt		
$ myprg cp -f file.txt		     # use alias
$ myprg cpy -f file.txt		     # use alias

• New Unparsing Extension method is added: FormatCommandLineArgs to return array of strings.
  see wiki
• New string extension method SplitArgs to split commandline string with handling double quote with/o keeping the double quote and ignoring the extra spaces in the string.

var myargs="-a xyz --name \"path to file\" -b 123";
string[] args =myargs.SplitArgs();     //return {"-a","xyz","--name","path to file", "-b", "123"}
string[] args =myargs.SplitArgs(true);     //keep quote and return {"-a","xyz","--name","\"path to file\"", "-b", "123"}

• Allow single dash as a value, now it's allowed: -a - --filename - .

[oolong2]

How do flags work? Trying to figure out how to specify multiple values for an enumeration in the command line....

[moh-hassan]

Enum Flags in wiki show how to use multiple values for an enumeration.
Try online demo.