| // Copyright lowRISC contributors. |
| // Licensed under the Apache License, Version 2.0, see LICENSE for details. |
| // SPDX-License-Identifier: Apache-2.0 |
| |
| use anyhow::Result; |
| use structopt::StructOpt; |
| use thiserror::Error; |
| |
| use opentitanlib::transport::{EmptyTransport, Transport}; |
| |
| #[derive(Debug, StructOpt)] |
| pub struct BackendOpts { |
| #[structopt(long, default_value)] |
| interface: String, |
| } |
| |
| #[derive(Error, Debug)] |
| pub enum Error { |
| #[error("unknown interface {0}")] |
| UnknownInterface(String), |
| } |
| |
| /// Creates the requested backend interface according to [`BackendOpts`]. |
| pub fn create(args: &BackendOpts) -> Result<Box<dyn Transport>> { |
| match args.interface.as_str() { |
| "" => Ok(Box::new(EmptyTransport)), |
| _ => Err(Error::UnknownInterface(args.interface.clone()).into()), |
| } |
| } |
