read-cache & fetch-negotiator: check "enum" values in switch()
Change tweak_untracked_cache() in "read-cache.c" to use a switch() to
have the compiler assert that we checked all possible values in the
"enum untracked_cache_setting" type, and likewise remove the "default"
case in fetch_negotiator_init() in favor of checking for
"FETCH_NEGOTIATION_UNSET" and "FETCH_NEGOTIATION_NONE".
As will be discussed in a subsequent we'll only ever have either of
these set to FETCH_NEGOTIATION_NONE, FETCH_NEGOTIATION_UNSET and
UNTRACKED_CACHE_UNSET within the prepare_repo_settings() function
itself. In preparation for fixing that code let's add a BUG() here to
mark this as unreachable code.
See ad0fb659993 (repo-settings: parse core.untrackedCache, 2019-08-13)
for when the "unset" and "keep" handling for core.untrackedCache was
consolidated, and aaf633c2ad1 (repo-settings: create
feature.experimental setting, 2019-08-13) for the addition of the
"default" pattern in "fetch-negotiator.c".
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/read-cache.c b/read-cache.c
index 9048ef9..4892813 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1944,13 +1944,18 @@ static void tweak_untracked_cache(struct index_state *istate)
prepare_repo_settings(r);
- if (r->settings.core_untracked_cache == UNTRACKED_CACHE_REMOVE) {
+ switch (r->settings.core_untracked_cache) {
+ case UNTRACKED_CACHE_REMOVE:
remove_untracked_cache(istate);
- return;
- }
-
- if (r->settings.core_untracked_cache == UNTRACKED_CACHE_WRITE)
+ break;
+ case UNTRACKED_CACHE_WRITE:
add_untracked_cache(istate);
+ break;
+ case UNTRACKED_CACHE_KEEP:
+ break;
+ case UNTRACKED_CACHE_UNSET:
+ BUG("UNTRACKED_CACHE_UNSET used outside of prepare_repo_settings()!");
+ }
}
static void tweak_split_index(struct index_state *istate)
