Function register

src/shell_session_store.rs:72–82

Persist `value` for the current shell session (keyed by the parent PID of this process).

(kind: SessionKind, value: &T)

/// Persist `value` for the current shell session (keyed by the parent PID of
/// this process).
pub(crate) fn register<T: Serialize>(kind: SessionKind, value: &T) -> Result<()> {
    let dir = get_root_dir(kind);
    std::fs::create_dir_all(&dir)?;

    let parent_pid =
        get_parent_pid(std::process::id() as pid_t).context("Could not determine parent PID")?;

    let path = get_state_file_path(&dir, parent_pid);
    std::fs::write(path, serde_json::to_string(value)?)?;
    Ok(())
}

/// Look up a previously-registered value by walking up the process tree from
/// this process. Returns `None` if no ancestor has registered a value.