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//
// imag - the personal information management suite for the commandline
// Copyright (C) 2015-2020 the imag contributors
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; version
// 2.1 of the License.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
use std::io::ErrorKind;
use crate::exit::ExitCode;
pub enum Settings {
Ignore(ErrorKind),
IgnoreAny(Vec<ErrorKind>),
}
pub trait ToExitCode<T> {
fn to_exit_code(self) -> Result<T, ExitCode>;
fn to_exit_code_with(self, _: Settings) -> Result<T, ExitCode>;
}
impl<T> ToExitCode<T> for Result<T, ::std::io::Error> {
/// Returns an exit code of 0 if the error was a broken pipe, else 1
fn to_exit_code(self) -> Result<T, ExitCode> {
self.to_exit_code_with(Settings::Ignore(ErrorKind::BrokenPipe))
}
/// Returns an exit code depending on the settings
///
/// Via the settings, errors can be ignores (translates to exit code zero). All other errors
/// are translated into exit code 1
///
fn to_exit_code_with(self, settings: Settings) -> Result<T, ExitCode> {
self.map_err(move |e| match settings {
Settings::Ignore(kind) => if e.kind() == kind {
0
} else {
1
},
Settings::IgnoreAny(v) => if v.iter().any(|el| e.kind() == *el) {
0
} else {
1
},
})
.map_err(ExitCode::from)
}
}
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