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// error.rs
// *************************************************************************
// * Copyright (C) 2017-2020 Daniel Mueller (deso@posteo.net) *
// * *
// * This program is free software: you can redistribute it and/or modify *
// * it under the terms of the GNU General Public License as published by *
// * the Free Software Foundation, either version 3 of the License, or *
// * (at your option) any later version. *
// * *
// * This program is distributed in the hope that it will be useful, *
// * but WITHOUT ANY WARRANTY; without even the implied warranty of *
// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
// * GNU General Public License for more details. *
// * *
// * You should have received a copy of the GNU General Public License *
// * along with this program. If not, see <http://www.gnu.org/licenses/>. *
// *************************************************************************
use std::fmt;
use std::io;
use std::str;
use std::string;
use structopt::clap;
/// A trait used to simplify error handling in conjunction with the
/// try_with_* functions we use for repeatedly asking the user for a
/// secret.
pub trait TryInto<T> {
fn try_into(self) -> Result<T, Error>;
}
impl<T, U> TryInto<U> for T
where
T: Into<U>,
{
fn try_into(self) -> Result<U, Error> {
Ok(self.into())
}
}
#[derive(Debug)]
pub enum Error {
ClapError(clap::Error),
IoError(io::Error),
NitrokeyError(Option<&'static str>, nitrokey::Error),
Utf8Error(str::Utf8Error),
Error(String),
}
impl TryInto<nitrokey::Error> for Error {
fn try_into(self) -> Result<nitrokey::Error, Error> {
match self {
Error::NitrokeyError(_, err) => Ok(err),
err => Err(err),
}
}
}
impl From<&str> for Error {
fn from(s: &str) -> Error {
Error::Error(s.to_string())
}
}
impl From<String> for Error {
fn from(s: String) -> Error {
Error::Error(s)
}
}
impl From<clap::Error> for Error {
fn from(e: clap::Error) -> Error {
Error::ClapError(e)
}
}
impl From<nitrokey::Error> for Error {
fn from(e: nitrokey::Error) -> Error {
Error::NitrokeyError(None, e)
}
}
impl From<io::Error> for Error {
fn from(e: io::Error) -> Error {
Error::IoError(e)
}
}
impl From<str::Utf8Error> for Error {
fn from(e: str::Utf8Error) -> Error {
Error::Utf8Error(e)
}
}
impl From<string::FromUtf8Error> for Error {
fn from(e: string::FromUtf8Error) -> Error {
Error::Utf8Error(e.utf8_error())
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match *self {
Error::ClapError(ref e) => write!(f, "{}", e),
Error::NitrokeyError(ref ctx, ref e) => {
if let Some(ctx) = ctx {
write!(f, "{}: ", ctx)?;
}
write!(f, "{}", e)
}
Error::Utf8Error(_) => write!(f, "Encountered UTF-8 conversion error"),
Error::IoError(ref e) => write!(f, "IO error: {}", e),
Error::Error(ref e) => write!(f, "{}", e),
}
}
}
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