use crate::ui::ERROR_PREFIX;
pub fn exit_if_extra_args(
command_name: &str,
parent_args: &[String],
expected_arg_count: usize,
) -> Result<(), ExtraArgsError> {
if parent_args.len() <= expected_arg_count {
Ok(())
} else {
Err(ExtraArgsError {
command_name: command_name.to_string(),
extra_args: parent_args[expected_arg_count..].to_vec(),
})
}
}
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct ExtraArgsError {
pub command_name: String,
pub extra_args: Vec<String>,
}
impl ExtraArgsError {
pub fn usage_message(&self) -> String {
format!(
"Run \"nest {} --help\" for usage information.\n",
self.command_name
)
}
}
impl std::fmt::Display for ExtraArgsError {
fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(
formatter,
"{ERROR_PREFIX} Too many arguments. Unexpected extra argument(s): {}",
self.extra_args.join(", ")
)
}
}
impl std::error::Error for ExtraArgsError {}