pub fn spec_bin(
args: impl IntoIterator<Item = impl AsRef<str>>,
default_bin: &str,
) -> Option<String>Available on crate feature
usage only.Expand description
Read --usage-spec or --usage-spec=BIN from args, which exclude the
program name.
Returns the task name the spec is for: BIN, or default_bin for a bare
flag or an empty BIN. Scanning stops at --, so an argument after it
never counts.