c02d7693b2
`Write` is implemented on both `&NamedTemporaryFile` and `&File` so you don't actually need a mutable reference. I wish there were a better way to do this but such is life.
54 lines
1.8 KiB
Rust
54 lines
1.8 KiB
Rust
//
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// imag - the personal information management suite for the commandline
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// Copyright (C) 2015, 2016 Matthias Beyer <mail@beyermatthias.de> and contributors
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; version
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// 2.1 of the License.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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//
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use std::io::Read;
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use std::io::Seek;
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use std::io::SeekFrom;
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use std::io::Write;
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use std::process::Command;
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use std::io::Error as IOError;
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use tempfile::NamedTempFile;
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pub fn edit_in_tmpfile_with_command(mut cmd: Command, s: &mut String) -> Result<bool, IOError> {
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let mut file = &try!(NamedTempFile::new());
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let file_path = file.path();
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try!(file.write_all(&s.clone().into_bytes()[..]));
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try!(file.sync_data());
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cmd.arg(file_path)
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.status()
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.and_then(|status| {
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if status.success() {
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file.sync_data()
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.and_then(|_| file.seek(SeekFrom::Start(0)))
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.and_then(|_| {
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let mut new_s = String::new();
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let res = file.read_to_string(&mut new_s);
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*s = new_s;
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res
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})
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.map(|_| true)
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} else {
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Ok(false)
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}
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})
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}
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