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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 = &NamedTempFile::new()?;
let file_path = file.path();
file.write_all(&s.clone().into_bytes()[..])?;
file.as_file().sync_data()?;
debug!("Calling {:?} for {}", cmd, file_path.display());
cmd.arg(file_path)
.status()
.and_then(|status| {
if status.success() {
file.as_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)
}
})
}