json_file.rs (1257B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2025 Taler Systems SA 4 5 TALER is free software; you can redistribute it and/or modify it under the 6 terms of the GNU Affero General Public License as published by the Free Software 7 Foundation; either version 3, or (at your option) any later version. 8 9 TALER is distributed in the hope that it will be useful, but WITHOUT ANY 10 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR 11 A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details. 12 13 You should have received a copy of the GNU Affero General Public License along with 14 TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> 15 */ 16 17 use std::path::Path; 18 19 use serde::{Serialize, de::DeserializeOwned}; 20 21 pub fn persist<T: Serialize>(path: impl AsRef<Path>, value: &T) -> std::io::Result<()> { 22 let path = path.as_ref(); 23 let mut tmp = tempfile::NamedTempFile::new_in(path.parent().unwrap())?; 24 serde_json::to_writer(&mut tmp, value)?; 25 tmp.persist(path)?; 26 Ok(()) 27 } 28 29 pub fn load<T: DeserializeOwned>(path: impl AsRef<Path>) -> std::io::Result<T> { 30 let mut file = std::fs::File::open(path)?; 31 let content = serde_json::from_reader(&mut file)?; 32 Ok(content) 33 }