sparse-index.c: remove set_index_sparse_config()

Remove the set_index_sparse_config() function by folding it into
set_sparse_index_config(), which was its only user.

Since 122ba1f (sparse-checkout: toggle sparse index from builtin,
2021-03-30) the flow of this code hasn't made much sense, we'd get
"enabled" in set_sparse_index_config(), proceed to call
set_index_sparse_config() with it.

There we'd call prepare_repo_settings() and set
"repo->settings.sparse_index = 1", only to needlessly call
prepare_repo_settings() again in set_sparse_index_config() (where it
would early abort), and finally setting "repo->settings.sparse_index =
enabled".

Instead we can just call prepare_repo_settings() once, and set the
variable to "enabled" in the first place.

Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: avar

sparse-index.c

@@ -102,7 +102,7 @@ static int convert_to_sparse_rec(struct index_state *istate,
 	return num_converted - start_converted;
 }
 
-static int set_index_sparse_config(struct repository *repo, int enable)
+int set_sparse_index_config(struct repository *repo, int enable)
 {
 	int res;
 	char *config_path = repo_git_path(repo, "config.worktree");
@@ -111,15 +111,6 @@ static int set_index_sparse_config(struct repository *repo, int enable)
 					    enable ? "true" : NULL);
 	free(config_path);
 
-	prepare_repo_settings(repo);
-	repo->settings.sparse_index = 1;
-	return res;
-}
-
-int set_sparse_index_config(struct repository *repo, int enable)
-{
-	int res = set_index_sparse_config(repo, enable);
-
 	prepare_repo_settings(repo);
 	repo->settings.sparse_index = enable;
 	return res;