| use clap::Parser; |
| use std::io; |
| use std::path::PathBuf; |
| |
| #[derive(Parser, Debug)] |
| #[command(author, version, about, long_about=None)] |
| /// This program trains a dictionary from one or more files, |
| /// to make future compression of similar small files more efficient. |
| /// |
| /// The dictionary will need to be present during decompression, |
| /// but if you need to compress many small files individually, |
| /// it may be worth the trouble. |
| struct Args { |
| /// Maximum dictionary size in bytes. |
| #[arg(short, long)] |
| max_size: usize, |
| |
| /// Files to use as input. |
| files: Vec<PathBuf>, |
| } |
| |
| fn main() { |
| let args = Args::parse(); |
| |
| let dict = zstd::dict::from_files(&args.files, args.max_size).unwrap(); |
| |
| let mut dict_reader: &[u8] = &dict; |
| io::copy(&mut dict_reader, &mut io::stdout()).unwrap(); |
| } |
