Add ability to skip options with default values for UnParserSettings

[MichaelMankiewicz]

I have many command line parameters with default values in most of them. My app generates .bat file to run itself with parameters which passed to it's main instance. Now Parser.Default.FormatCommandLine makes long string with all parameters, most of which has default values and can be omitted.
I want to be able to set UnParserSettings to skip parameters that has default values when I use it as
FormatCommandLine action's parameter. Is it possible?

[moh-hassan]

I agree with you to skip the parameters that have default values.
This enhancement may be available in the next release.

[moh-hassan]

I just want to confirm this test case:

class Options
        {
            [Option(Default = 99)] //should be skipped when P1=99
            public  int P1 { get;set;}
            [Option()]
            public  string P2 { get;set;}
            [Option(Default = 88)] //should be skipped when P3=88
            public  int P3 { get;set;}
        }

var options = new Options{P2="xyz" ,P1=99, P3=88}	;

  args should be:  --p2 xyz   

Is it right?

[MichaelMankiewicz]

Yes, this is exactly what I mean

[moh-hassan]

@MichaelMankiewicz
The issue is fixed and you can try the nuget Package downloaded from CI server
I appreciate you if you can feedback your test result to merge the PR.

[moh-hassan]

Example:

  var options = new Options_With_Defaults {P2 = "xyz", P1 = 99, P3 = 88,P4= Shapes.Square }  ;
       var args=     new Parser()
              //Configure Unparser: SkipDefault=true
                .FormatCommandLine(options,x=>x.SkipDefault=true) ;

    class Options_With_Defaults
    {
        [Option(Default = 99)]
        public int P1 { get; set; }
        [Option()]
        public string P2 { get; set; }
        [Option(Default = 88)]
        public int P3 { get; set; }
        [Option(Default = Shapes.Square)]
        public Shapes P4 { get; set; }   //enum option
    }

result:

 args= --p2 xyz

[moh-hassan]

Fixed in v2.7+, See wiki with online demo