Re: [PATCH 3/3] split-index: it really is incompatible with the sparse index

> From: Johannes Schindelin <johannes.schindelin@gmx.de>
>
> ... at least for now. So let's error out if we are even trying to
> initialize the split index when the index is sparse, or when trying to
> write the split index extension for a sparse index.
>
> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
> ---
>  read-cache.c  | 3 +++
>  split-index.c | 3 +++
>  2 files changed, 6 insertions(+)

> diff --git a/read-cache.c b/read-cache.c
> index cbe73f14e5e..a932e01fc7a 100644
> --- a/read-cache.c
> +++ b/read-cache.c
> @@ -3009,6 +3009,9 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
>  	    !is_null_oid(&istate->split_index->base_oid)) {
>  		struct strbuf sb = STRBUF_INIT;
>  
> +		if (istate->sparse_index)
> +			die(_("cannot write split index for a sparse index"));
> +
>  		err = write_link_extension(&sb, istate) < 0 ||
>  			write_index_ext_header(f, eoie_c, CACHE_EXT_LINK,
>  					       sb.len) < 0;
> diff --git a/split-index.c b/split-index.c
> index 8e52e891c3b..9d0ccc30d00 100644
> --- a/split-index.c
> +++ b/split-index.c
> @@ -5,6 +5,9 @@
>  struct split_index *init_split_index(struct index_state *istate)
>  {
>  	if (!istate->split_index) {
> +		if (istate->sparse_index)
> +			die(_("cannot use split index with a sparse index"));
> +
>  		CALLOC_ARRAY(istate->split_index, 1);
>  		istate->split_index->refcount = 1;
>  	}