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// // imag - the personal information management suite for the commandline // Copyright (C) 2015, 2016 Matthias Beyer <mail@beyermatthias.de> and 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::Read; use std::io::Seek; use std::io::SeekFrom; use std::io::Write; use std::process::Command; use std::io::Error as IOError; use tempfile::NamedTempFile; pub fn edit_in_tmpfile_with_command(mut cmd: Command, s: &mut String) -> Result<bool, IOError> { let mut file = &try!(NamedTempFile::new()); let file_path = file.path(); try!(file.write_all(&s.clone().into_bytes()[..])); try!(file.sync_data()); cmd.arg(file_path) .status() .and_then(|status| { if status.success() { file.sync_data() .and_then(|_| file.seek(SeekFrom::Start(0))) .and_then(|_| { let mut new_s = String::new(); let res = file.read_to_string(&mut new_s); *s = new_s; res }) .map(|_| true) } else { Ok(false) } }) }