fn content_hash_tree_path()

in focus/internals/src/lib/index/content_hash.rs [382:408]

• 25 lines of code
• 4 McCabe index (conditional complexity)

fn content_hash_tree_path(ctx: &HashContext, path: &Path) -> Result<ContentHash> {
    if let Some(hash) = ctx.caches.borrow().tree_path_cache.get(path) {
        return Ok(hash.clone());
    }

    let mut buf = String::new();
    write!(
        &mut buf,
        "PathBufV{VERSION}({tree_id})",
        tree_id = get_tree_path_id(ctx.head_tree, path).map_err(Error::ReadTreeEntry)?,
    )?;

    let hash = git2::Oid::hash_object(git2::ObjectType::Blob, buf.as_bytes())
        .map_err(Error::HashObject)?;
    let hash = ContentHash(hash);
    if let Some(old_value) = ctx
        .caches
        .borrow_mut()
        .tree_path_cache
        .insert(path.to_owned(), hash.clone())
    {
        if old_value != hash {
            error!(key = ?path, ?old_value, new_value = ?hash, "Non-deterministic content hashing for path");
        }
    }
    Ok(hash)
}