Function arg_defaulted

crates/openshell-server/src/cli.rs:525–530

Returns `true` when an argument's value came from clap's built-in default (or was never supplied at all). When the predicate is `true`, the loader is free to replace the value with one read from the TOML config file.

(matches: &ArgMatches, id: &str)

/// (or was never supplied at all). When the predicate is `true`, the loader
/// is free to replace the value with one read from the TOML config file.
fn arg_defaulted(matches: &ArgMatches, id: &str) -> bool {
    matches!(
        matches.value_source(id),
        None | Some(ValueSource::DefaultValue)
    )
}

/// Resolve the bind address for an auxiliary listener (health / metrics).
///