open_file.rs

fn render_docs(source: &Path, dest: &Path) -> Result<(), io::Error> {
  let dir_list = try!(read_dir(source)
    .map_err(|e| Error::Io(source.to_path_buf(), e)));
  for entry_res in dir_list {
    let entry = try!(entry_res
      .map_err(|e| Error::Io(source.to_path_buf(), e)));
    let path = entry.path();
    let file = try!(File::open(&path)
      .map_err(|e| Error::Io(path.clone(), e)));
    for line_res in file.lines() {
      let line = try!(line_res
        .map_err(|e| Error::Io(source.to_path_buf(), e)));
      // ...