Introduce more than 7 arguments in System.CommandLine.Invocation.CommandHandler.Create

[mristin]

Hi,
I noticed that the CommandHandler.Create is limited to at most 7 arguments of the action. This corresponds to at most 7 options, which is a bit too little in a more complex applications.

Was there a reason for this limit (instead of pushing it higher to, say, 16)? What is your suggested way to handle more than 7 options?

Thanks a lot for the answers in advance! Please let me know if I should create a pull request to introduce a higher limit if there is no particular reason for the current one.

[spmyob]

I've run into this exact same issue and would be interested in finding out if there's a workaround for this.

[jonsequitur]

The model binder also supports binding to complex types. You can see more details here: https://github.com/dotnet/command-line-api/blob/master/docs/model-binding.md#more-complex-types

[spmyob]

That looks exactly like what I needed. Not sure how I missed it in the docs. Thanks @jonsequitur.

[mristin]

@jonsequitur shouldn't that article be referenced from the home page? I also missed it, especially since the referenced article "Argument validation and binding" does not make a visible reference to complex type binding.

(Should I make a PR for the homepage or extend the article "Argument ..."?)

[mristin]

@jonsequitur it still wouldn't harm to add more arguments to Create or you'd prefer not to?

[jonsequitur]

it still wouldn't harm to add more arguments to Create or you'd prefer not to?

I mean, we could go to 11... Do you have a preference for more arguments versus complex model binding?

The documentation could use some help though. We've just started trying to consolidate and reorganize the docs, and we want to make a push to add XML comments as well. PRs are more than welcome.