Function save_to_disk_async 

pub async fn save_to_disk_async(
    index: OfficialIndex,
    path: PathBuf,
) -> Result<()>

What: Persist an official package index to disk asynchronously.

Inputs:

• index: The index to serialize and write (moved into the blocking task).
• path: File path to write the JSON index to.

Output:

• Returns a future resolving to Result<()> (same semantics as save_to_disk).

Details:

• Uses tokio::task::spawn_blocking to avoid blocking the async runtime on file I/O.
• Takes the index by value because the blocking task requires 'static data; clone before calling if the index is still needed.

Errors

Returns an error if the blocking task fails, the parent directory cannot be created, serialization fails, or the file cannot be written.

Example

use arch_toolkit::index::{save_to_disk_async, OfficialIndex};
use std::path::PathBuf;

let index = OfficialIndex::default();
save_to_disk_async(index, PathBuf::from("official_index.json")).await?;