Add Context to DefaultProviderAttribute

[MikeJansen]

New Context property for DefaultProviderAttribute which gets passed on
to new Context property on DefaultProvider abstract class.

I added this so that I could determine which property the DefaultProvider was being invoked on. I could not determine that from the VerbExecutionContext during DefaultProvider.GetDefault(). Another way could be to add a Parameter property to the VerbExecutionContext but this way seemed more flexible.

Now I can use a single DefaultProvider-derived class to service many different properties. In my specific application, I have a verb to set defaults for other verb/parameter combinations and the my DefaultProvider checks for a saved default if the parameter isn't supplied on the command line.

Example attribute usage:

[DefaultProvider(typeof(ProfileDefaultProvider), "chatId")]

Example DefaultProvider derived class:

public class ProfileDefaultProvider : DefaultProvider
{
public override object GetDefault(VerbExecutionContext context)
{
string verb = context.Method.MethodInfo.Name;
string key = Context;
return Program.ProfileData.GetVerbData(verb, key);
}
}

[MikeJansen]

It doesn't look like you are actively developing this, but just wanted to pass on that I have been using CLAP for years and IMO it's still the best command line lib out there for .NET that I have run into. I even use it for a command parser in a chat application we have developed.

[adrianaisemberg]

@MikeJansen that's true.
Unfortunately I am not actively involved in this project anymore.

Thank you for your feedback. I really appreciate it and seeing that CLAP is still being used after so many years means a lot to me :)