[PATCH v2 3/3] add: use advise_if_enabled for ADVICE_ADD_EMBEDDED_REPO

["Rubén Justo" <rjusto@gmail.com>]

By following a similar reasoning as in previous commits, there are no
reason why we should not use the advise_if_enabled() API to display the
ADVICE_ADD_EMBEDDED_REPO advice.

This advice was introduced in 532139940c (add: warn when adding an
embedded repository, 2017-06-14).  Some tests were included in the
commit, but none is testing this advice.  Which, note, we only want to
display once per run.

So, use the advise_if_enabled() machinery to show the
ADVICE_ADD_EMBEDDED_REPO advice and include a test to notice any
possible breakage.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Rubén Justo <rjusto@gmail.com>
---
 builtin/add.c  |  6 +++---
 t/t3700-add.sh | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 3 deletions(-)

diff --git a/builtin/add.c b/builtin/add.c
index 289adaaecf..e97699d6b9 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -310,9 +310,9 @@ static void check_embedded_repo(const char *path)
 	strbuf_strip_suffix(&name, "/");
 
 	warning(_("adding embedded git repository: %s"), name.buf);
-	if (!adviced_on_embedded_repo &&
-	    advice_enabled(ADVICE_ADD_EMBEDDED_REPO)) {
-		advise(embedded_advice, name.buf, name.buf);
+	if (!adviced_on_embedded_repo) {
+		advise_if_enabled(ADVICE_ADD_EMBEDDED_REPO,
+				  embedded_advice, name.buf, name.buf);
 		adviced_on_embedded_repo = 1;
 	}
 
diff --git a/t/t3700-add.sh b/t/t3700-add.sh
index 681081e0d5..839c904745 100755
--- a/t/t3700-add.sh
+++ b/t/t3700-add.sh
@@ -349,6 +349,40 @@ test_expect_success '"git add ." in empty repo' '
 	)
 '
 
+test_expect_success '"git add" a embedded repository' '
+	rm -fr outer && git init outer &&
+	(
+		cd outer &&
+		for i in 1 2
+		do
+			name=inner$i &&
+			git init $name &&
+			git -C $name commit --allow-empty -m $name ||
+				return 1
+		done &&
+		git add . 2>actual &&
+		cat >expect <<-EOF &&
+		warning: adding embedded git repository: inner1
+		hint: You${SQ}ve added another git repository inside your current repository.
+		hint: Clones of the outer repository will not contain the contents of
+		hint: the embedded repository and will not know how to obtain it.
+		hint: If you meant to add a submodule, use:
+		hint:
+		hint: 	git submodule add <url> inner1
+		hint:
+		hint: If you added this path by mistake, you can remove it from the
+		hint: index with:
+		hint:
+		hint: 	git rm --cached inner1
+		hint:
+		hint: See "git help submodule" for more information.
+		hint: Disable this message with "git config advice.addEmbeddedRepo false"
+		warning: adding embedded git repository: inner2
+		EOF
+		test_cmp expect actual
+	)
+'
+
 test_expect_success 'error on a repository with no commits' '
 	rm -fr empty &&
 	git init empty &&
-- 
2.44.0.417.g254ece0ee4