Rust example

Horrible Rust Example.rs

fn process(from: &Path, to: &Path) -> IoResult<()> {  
    // creates a new tempdir with the specified suffix
    let tempdir = try!(TempDir::new("skylight"));

    // open the input file
    let mut from_file = try!(File::open(from));

    // create a temporary file inside the tempdir
    let mut tempfile =
        try!(File::create(&tempdir.path().join("tmp1")));

    // copy the input file into the tempfile
    try!(io::util::copy(&mut from_file, &mut tempfile));

    // use an external program to process the tmpfile in place

    // after processing, copy the tempfile into the output file
    let mut out = try!(File::create(to));

    io::util::copy(&mut tempfile, &mut out)
}