huffman/src/cli.rs

use std::ffi::OsString;

use clap::Parser;
use clap::ValueEnum;

#[derive(Parser, Debug)]
#[command(version, about, long_about = None)]
pub struct Args {

    /// input file
    pub input_file: OsString,

    /// output file
    pub output_file: Option<OsString>,

    /// Whether to compress or extract.
    #[arg(short, value_enum, default_value = Mode::C)]
    pub mode: Mode,
}

#[derive(Clone, Copy, Debug, ValueEnum, Default)]
pub enum Mode {
    /// Extract
    X,
    #[default]
    /// Compress
    C,
}

impl Into<clap::builder::OsStr> for Mode {
    fn into(self) -> clap::builder::OsStr {
        match self {
            Mode::X => clap::builder::OsStr::from("x"),
            Mode::C => clap::builder::OsStr::from("c"),
        }
    }
}