pub fn process(&self) -> Result<()> {
    match self.mode {
        Mode::Format => {
            self.file_list
                .iter()
                .map(|file| self.format_process(file))
                .collect::<Result<Vec<_>>>()?;
        }
        Mode::Compress => {
            if self.output.exists() {
                fs::remove_dir_all(&self.output)?;
            }
            fs::create_dir_all(&self.output)?;
            self.file_list
                .iter()
                .map(|path| self.compress_process(path))
                .collect::<Result<Vec<_>>>()?;
        }
    }
    Ok(())
}