lowfat 0.3.0

CLI binary for lowfat
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use anyhow::Result;
use lowfat_core::config::RunfConfig;
use lowfat_core::level::Level;

pub fn run(value: Option<&str>) -> Result<()> {
    match value {
        Some(v) => {
            let level: Level = v
                .parse()
                .map_err(|e: String| anyhow::anyhow!(e))?;
            println!("lowfat: level set to {level}");
            println!("  (export LOWFAT_LEVEL={level} to persist in this shell)");
        }
        None => {
            let config = RunfConfig::resolve();
            println!("lowfat: level={}", config.level);
        }
    }
    Ok(())
}