Merge branch 'bc/log-decoration' into maint

"git log --decorate" did not handle a tag pointed by another tag
nicely.

* bc/log-decoration:
  log: properly handle decorations with chained tags

Author: gitster

log-tree.c

@@ -134,6 +134,8 @@ static int add_ref_decoration(const char *refname, const unsigned char *sha1, in
 		obj = ((struct tag *)obj)->tagged;
 		if (!obj)
 			break;
+		if (!obj->parsed)
+			parse_object(obj->sha1);
 		add_name_decoration(DECORATION_REF_TAG, refname, obj);
 	}
 	return 0;

t/t4205-log-pretty-formats.sh

@@ -310,4 +310,19 @@ EOF
 	test_cmp expected actual
 '
 
+test_expect_success 'log decoration properly follows tag chain' '
+	git tag -a tag1 -m tag1 &&
+	git tag -a tag2 -m tag2 tag1 &&
+	git tag -d tag1 &&
+	git commit --amend -m shorter &&
+	git log --no-walk --tags --pretty="%H %d" --decorate=full >actual &&
+	cat <<EOF >expected &&
+6a908c10688b2503073c39c9ba26322c73902bb5  (tag: refs/tags/tag2)
+9f716384d92283fb915a4eee5073f030638e05f9  (tag: refs/tags/message-one)
+b87e4cccdb77336ea79d89224737be7ea8e95367  (tag: refs/tags/message-two)
+EOF
+	sort actual >actual1 &&
+	test_cmp expected actual1
+'
+
 test_done