Re: [PATCH] show-index: warn when falling back to SHA-1 outside a repository

>  	/*
>  	 * Fallback to SHA1 if we are running outside of a repository.
>  	 *
> -	 * TODO: Figure out and implement a way to detect the hash algorithm in use by the
> -	 *       the index file passed in and use that instead.
> +	 * TODO: If a future implementation of index file version encodes the hash
> +	 *       algorithm in its header, enable show-index to infer it from the
> +	 *       header rather than relying on repository context or a default fallback.
>  	 */
> -	if (!the_hash_algo)
> +	if (!the_hash_algo) {
> +		warning(_("assuming SHA-1; use --object-format to override"));
>  		repo_set_hash_algo(the_repository, GIT_HASH_DEFAULT);