Function sc_cli::from_iter

pub fn from_iter<T, I>(iter: I, version: &VersionInfo) -> T where
    T: StructOpt + Sized,
    I: IntoIterator,
    I::Item: Into<OsString> + Clone, 

Helper function used to parse the command line arguments. This is the equivalent of structopt's from_iter() except that it takes a VersionInfo argument to provide the name of the application, author, "about" and version. It will also set AppSettings::GlobalVersion.

To allow running the node without subcommand, tt also sets a few more settings: AppSettings::ArgsNegateSubcommands and AppSettings::SubcommandsNegateReqs.

Gets the struct from any iterator such as a Vec of your making. Print the error message and quit the program in case of failure.