Function user_data_dir

src/config.rs:355–361

User-level data directory. Runtime storage is always rooted at `~/.tracedecay` unless `TRACEDECAY_DATA_DIR` explicitly overrides it.

()

/// User-level data directory. Runtime storage is always rooted at
/// `~/.tracedecay` unless `TRACEDECAY_DATA_DIR` explicitly overrides it.
pub fn user_data_dir() -> Option<PathBuf> {
    if let Some(path) = std::env::var_os(USER_DATA_DIR_ENV).filter(|path| !path.is_empty()) {
        return Some(canonicalize_data_dir(PathBuf::from(path)));
    }
    let home = dirs::home_dir()?;
    Some(canonicalize_data_dir(home.join(TRACEDECAY_DIR)))
}

fn canonicalize_data_dir(path: PathBuf) -> PathBuf {
    if !path.is_absolute() {