redish 0.3.0

A lightweight in-memory key-value database
Documentation 
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use std::fs;
use std::path::PathBuf;

pub(crate) fn logo() {
    if cfg!(not(debug_assertions)) {
        use log::info;
        info!("______           _  _       _     ");
        info!("| ___ \\         | |(_)     | |    ");
        info!("| |_/ / ___   __| | _  ___ | |__  ");
        info!("|    / / _ \\ / _` || |/ __|| '_ \\ ");
        info!("| |\\ \\|  __/| (_| || |\\__ \\| | | |");
        info!("\\_| \\_|\\___| \\__,_||_||___/|_| |_|");
        info!("Redish v{} started", env!("CARGO_PKG_VERSION"));
    }
}

pub(crate) fn find_last_sstable_number(directory: &PathBuf) -> Option<usize> {
    fs::read_dir(directory)
        .ok()?
        .filter_map(|entry| entry.ok())
        .filter_map(|entry| {
            let file_name = entry.file_name();
            let file_name_str = file_name.to_string_lossy();
            if file_name_str.starts_with("sstable_") && file_name_str.ends_with(".sst") {
                let number_part = &file_name_str[8..file_name_str.len() - 4];
                number_part.parse::<usize>().ok()
            } else {
                None
            }
        })
        .max()
}