Is there a way to share common options from subcomands?

[Satoshi-Kusumoto]

If all the subcommands share the same --option, currently I know the following works

MyCmd --option subcommand xxxx

But is it possible to have

MyCmd subcommand xxxx --option

wile option is parsed not at the subcommand level?

[pksunkara]

The only way is to create an Arg in the code and just use it at all the places you need.

[CreepySkeleton]

Also, if you're willing to use the derive (or structopt), you can use flattening; it fits really well.

[Satoshi-Kusumoto]

@CreepySkeleton Thank you for the link~
@pksunkara The problem of Arg is that seems it's always pared before the Subcommand, therefore not possible to have --option parsed as Arg

MyCmd subcommand xxxx --option

Even with the following code

    let matches = App::new(name)
        .subcommand(
            SubCommand::with_name("subcommand")
            ...
        )
        .arg(
            Arg::with_name("option")
                .takes_value(true)
                .long("option")
                ...
        )

[CreepySkeleton]

Disregard the link, I've misunderstood the question.

If you want an option to be available not only on the subcommand level, you can use global(true)

[pksunkara]

I think you misunderstood what I meant.

let common_arg = Arg::with_name("option")
    .takes_value(true)
    .long("option");

let matches = App::new(name)
    .arg(common_arg.clone())
    .subcommand(
        SubCommand::with_name("subcommand")
            .arg(common_arg.clone())
    );