How to create a global flag

[ThorstenHans]

I wanted to create a global debug flag, so that all sub-commands accept this flag. However, adding global = true turns my flag into an argument which requires a value.

From documentation, I don't see another way how I can turn a flag into a global flag. Any suggestions here?

struct FooBar {
    #[structopt(long, short, help = "Prints debug information", global = true, env = "STRINGS__DEBUG")]
    debug: bool,
    input: String,
    #[structopt(subcommand)]
    cmd: SubCommand
}

when executing with this configuration, and providing just --debug, the app fails with the following error:

error: The argument '--debug <debug>' requires a value but none was supplied

[TeXitoi]

That's not global fault, that's env that change your flag to option. There is no really any solution for this using structopt and clapv2, but clapv3 (in alpha stage) should propose a solution for this.

[epage]

Don't know if we've solved every problem here but clap-rs/clap#2539 was closed by clap-rs/clap#2664

[ThorstenHans]

🙏🏼 Thanks for pointing me to env.