Function fetch_official_index 

pub fn fetch_official_index() -> Result<OfficialIndex>

What: Fetch the official package index using pacman -Sl.

Inputs:

• None: Attempts to fetch via pacman -Sl command.

Output:

• Ok(OfficialIndex) containing all official packages with name index rebuilt.
• Err if pacman is unavailable or output cannot be parsed.

Details:

• Uses pacman -Sl for fast, local fetching (no network required).
• Queries the default repositories (core, extra, multilib) only. On derivative distros (EndeavourOS, CachyOS, …) combine detect_enabled_repos with fetch_official_index_for_repos instead.
• For API fallback, use fetch_official_index_async() instead.
• Rebuilds name index after fetching for O(1) lookups.

Errors

• Returns Err(ArchToolkitError::Parse) if pacman is unavailable or output cannot be parsed.

Example

use arch_toolkit::index::fetch_official_index;

let index = fetch_official_index()?;
println!("Found {} official packages", index.pkgs.len());