elio 1.5.1

Snappy, batteries-included terminal file manager with rich previews, inline images, bulk actions, and trash support.
Documentation 
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use super::Config;
use std::{env, fs, io, path::PathBuf, sync::OnceLock};

static ACTIVE_CONFIG: OnceLock<Config> = OnceLock::new();

pub(super) fn initialize() {
    let _ = ACTIVE_CONFIG.get_or_init(load_config_from_disk);
}

pub(super) fn active_config() -> &'static Config {
    ACTIVE_CONFIG.get_or_init(Config::default_config)
}

pub(crate) fn config_dir() -> Option<PathBuf> {
    // XDG_CONFIG_HOME is honoured on all platforms so developers can redirect
    // the config location regardless of OS.
    if let Some(config_home) = env::var_os("XDG_CONFIG_HOME") {
        return Some(PathBuf::from(config_home).join("elio"));
    }

    // dirs::config_dir() returns:
    //   Linux/BSD : $HOME/.config
    //   macOS     : $HOME/Library/Application Support
    //   Windows   : %APPDATA% (Roaming)
    dirs::config_dir().map(|dir| dir.join("elio"))
}

fn load_config_from_disk() -> Config {
    let Some(path) = config_path() else {
        return Config::default_config();
    };
    let contents = match fs::read_to_string(&path) {
        Ok(contents) => contents,
        Err(error) if error.kind() == io::ErrorKind::NotFound => return Config::default_config(),
        Err(error) => {
            eprintln!(
                "elio: failed to read config from {}: {error}",
                path.display()
            );
            return Config::default_config();
        }
    };

    match Config::from_str(&contents) {
        Ok(config) => config,
        Err(error) => {
            eprintln!(
                "elio: failed to load config from {}: {error}",
                path.display()
            );
            Config::default_config()
        }
    }
}

fn config_path() -> Option<PathBuf> {
    config_dir().map(|dir| dir.join("config.toml"))
}