sparse-checkout: --no-sparse-index needs a full index

When the --no-sparse-index option is supplied, the sparse-checkout
builtin should explicitly ask to expand a sparse index to a full one.
This is currently done implicitly due to the command_requires_full_index
protection, but that will be removed in an upcoming change.

Signed-off-by: Derrick Stolee <[email protected]>

Author: derrickstolee

builtin/sparse-checkout.c

@@ -444,6 +444,9 @@ static int sparse_checkout_init(int argc, const char **argv)
 		/* force an index rewrite */
 		repo_read_index(the_repository);
 		the_repository->index->updated_workdir = 1;
+
+		if (!init_opts.sparse_index)
+			ensure_full_index(the_repository->index);
 	}
 
 	core_apply_sparse_checkout = 1;