NFlags

Simple yet powerfull library to made parsing CLI arguments easy. Library also allow to print usage help and application version "out of box".

For example of usage check Examples directory.

QuickStart

1. Install NFLags from NuGet.
2. Start new console project.
3. Configure NFLags:

Cli.Configure(configure => configure
    .SetDialect(Dialect.Gnu)
    .SetName("QuickStart")
    .SetDescription("This is NFlags")
    .EnableVersionOption()
)
.Root(rc => rc
    .RegisterFlag("flag1", "f", "Flag description", false)
    .RegisterOption("option", "o", "Option description", "optionDefaultValue")
    .RegisterParameter("param", "Param description", "ParamDefaultValue")
    .RegisterCommand("subcommand", "Subcommand Description", sc => sc
            .SetExecute((commandArgs, output) => output.WriteLine("This is subcommand: " + commandArgs.GetParameter<string>("SubParameter")))
            .RegisterParameter("SubParameter", "SubParameter description", "SubParameterValue")
    )
    .RegisterParamSeries("paramSeries", "paramSeriesDescription")
    .SetExecute((commandArgs, output) => output.WriteLine("This is root command: " + commandArgs.GetParameter<string>("param")))
).
Run(args);

Run application and enjoy:

$> dotnet NFlags.QuickStart.dll
This is root command: ParamDefaultValue%
$> dotnet NFlags.QuickStart.dll xxx
This is root command: xxx
$> dotnet NFlags.QuickStart.dll --help
Usage:
        QuickStart [COMMAND] [OPTIONS]... [PARAMETERS]...

This is NFlags

        Commands:
        command Sub command Description

        Parameters:
        <param> Param description (Default: 'ParamDefaultValue')
        <paramSeries...>        paramSeriesDescription

        Options:
        --flag1, -f     Flag description
        --option <option>, -o <option>  Option description (Default: 'optionDefaultValue')
        --help, -h      Prints this help
        --version, -v      Prints application version



$> dotnet NFlags.QuickStart.dll subcommand
This is subcommand: SubParameterValue
$> dotnet NFlags.QuickStart.dll subcommand yyy
This is subcommand: yyy
$> dotnet NFlags.QuickStart.dll command --help
Usage:
        QuickStart command [OPTIONS]... [PARAMETERS]...

This is NFlags

        Parameters:
        <Parameter>     Sub parameter description (Default: 'SubParameterValue')

        Options:
        --help, -h      Prints this help
        --version, -v      Prints application version

$> 

Documentation

See details on NFlags GitHub pages