tag: use new advice API to check visibility

change the advise call in tag library from advise() to
advise_if_enabled() to construct an example of the usage of
the new API.

Signed-off-by: Heba Waly <heba.waly@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/advice.c b/advice.c
index 9814d6c..ef4bef6 100644
--- a/advice.c
+++ b/advice.c
@@ -29,7 +29,6 @@
 int advice_waiting_for_editor = 1;
 int advice_graft_file_deprecated = 1;
 int advice_checkout_ambiguous_remote_branch_name = 1;
-int advice_nested_tag = 1;
 int advice_submodule_alternate_error_strategy_die = 1;
 
 static int advice_use_color = -1;
@@ -89,7 +88,6 @@
 	{ "waitingForEditor", &advice_waiting_for_editor },
 	{ "graftFileDeprecated", &advice_graft_file_deprecated },
 	{ "checkoutAmbiguousRemoteBranchName", &advice_checkout_ambiguous_remote_branch_name },
-	{ "nestedTag", &advice_nested_tag },
 	{ "submoduleAlternateErrorStrategyDie", &advice_submodule_alternate_error_strategy_die },
 
 	/* make this an alias for backward compatibility */
diff --git a/advice.h b/advice.h
index d72ab4a..77cbe5c 100644
--- a/advice.h
+++ b/advice.h
@@ -29,7 +29,6 @@
 extern int advice_waiting_for_editor;
 extern int advice_graft_file_deprecated;
 extern int advice_checkout_ambiguous_remote_branch_name;
-extern int advice_nested_tag;
 extern int advice_submodule_alternate_error_strategy_die;
 
 /*
diff --git a/builtin/tag.c b/builtin/tag.c
index e0a4c25..cc30d34 100644
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -231,8 +231,9 @@
 	if (type <= OBJ_NONE)
 		die(_("bad object type."));
 
-	if (type == OBJ_TAG && advice_nested_tag)
-		advise(_(message_advice_nested_tag), tag, object_ref);
+	if (type == OBJ_TAG)
+		advise_if_enabled(ADVICE_NESTED_TAG, _(message_advice_nested_tag),
+				  tag, object_ref);
 
 	strbuf_addf(&header,
 		    "object %s\n"
diff --git a/t/t7004-tag.sh b/t/t7004-tag.sh
index 6db92bd..74b637d 100755
--- a/t/t7004-tag.sh
+++ b/t/t7004-tag.sh
@@ -1726,6 +1726,7 @@
 	hint: already a tag. If you meant to tag the object that it points to, use:
 	hint: |
 	hint: 	git tag -f nested annotated-v4.0^{}
+	hint: Disable this message with "git config advice.nestedTag false"
 	EOF
 	git tag -m nested nested annotated-v4.0 2>actual &&
 	test_i18ncmp expect actual