Create a CommandOption that is required

[MrHinsh]

CommandOption has a field that is ValueIsOptional which seams to be set out of the string template that is passed in.

How do I set ValueIsOptional to false?

[patriksvensson]

The parameter needs to be of the type FlagValue<T>: https://spectreconsole.net/api/spectre.console.cli/flagvalue_1/#typeparam-T

[MrHinsh]

I have no idea what that means @patriksvensson. And I don't see any help on that link as to what the template test would look like.

What would it look like on:
[CommandOption("-p|--projectId")]

[patriksvensson]

Sorry, I misunderstood. All options are optional by default. If you want to enforce an option and make the option required, the best way is to override the Validate(CommandContext context, TSettings settings) on either the setting itself or the command.

public class MyCommand : Command<MyCommand.Settings>
{
    public sealed class Settings : CommandSettings
    {
        [CommandOption("-p|--projectId")]
        public string? ProjectId { get; set; }

        // You can validate the settings directly
        public override Validate(CommandContext context) 
        {
            if (ProjectID == null) {
                return ValidationResult.Error("Project ID id required");
            }

            return ValidationResult.Success();
        }
    }

    public override int Execute(CommandContext context, Settings settings)
    {
        return 0;
    }

    // OR, you can perform validation in the command
    // might be more usable if you require external services etc
    public override Validate(CommandContext context, Settings settings) 
    {
        if (settings.ProjectID == null) {
            return ValidationResult.Error("Project ID id required");
        }

        return ValidationResult.Success();
    }
}

Not sure if the code above compiles, but that should solve your problem.