36 lines
1 KiB
Rust
36 lines
1 KiB
Rust
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 file = try!(NamedTempFile::new());
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let file_path = file.path();
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let mut file = try!(file.reopen());
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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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