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/*
This file is part of TALER
Copyright (C) 2022 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
use flexi_logger::{DeferredNow, LogSpecification, Record};
pub use log;
use log::error;
use std::{fmt::Display, process::exit};
fn custom_format(
w: &mut dyn std::io::Write,
now: &mut DeferredNow,
record: &Record,
) -> Result<(), std::io::Error> {
write!(
w,
"{} {} {}",
now.format("%+"),
record.level(),
&record.args()
)
}
pub fn init() {
flexi_logger::Logger::with(LogSpecification::info())
.log_to_stderr()
.format(custom_format)
.start()
.unwrap();
}
pub trait OrFail<T, E> {
fn or_fail<F: FnOnce(E) -> String>(self, lambda: F) -> T;
}
impl<T, E> OrFail<T, E> for Result<T, E> {
fn or_fail<F: FnOnce(E) -> String>(self, lambda: F) -> T {
self.unwrap_or_else(|e| fail(lambda(e)))
}
}
impl<T> OrFail<T, ()> for Option<T> {
fn or_fail<F: FnOnce(()) -> String>(self, lambda: F) -> T {
self.unwrap_or_else(|| fail(lambda(())))
}
}
/// Log error message then exit
pub fn fail(msg: impl Display) -> ! {
error!("{}", msg);
exit(1);
}
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