hugolib: Fix fallbacks for menu entry Name and Title

Closes #13161

hugolib/menu_test.go

@@ -622,3 +622,79 @@ title: p3
 	b.AssertFileExists("public/index.html", true)
 	b.AssertFileContent("public/index.html", `<a href="/s1/p2/">p2</a><a href="/s1/">s1</a>`)
 }
+
+// Issue 13161
+func TestMenuNameAndTitleFallback(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+disableKinds = ['rss','sitemap','taxonomy','term']
+[[menus.main]]
+name = 'P1_ME_Name'
+title = 'P1_ME_Title'
+pageRef = '/p1'
+weight = 10
+[[menus.main]]
+pageRef = '/p2'
+weight = 20
+[[menus.main]]
+pageRef = '/p3'
+weight = 30
+[[menus.main]]
+name = 'S1_ME_Name'
+title = 'S1_ME_Title'
+pageRef = '/s1'
+weight = 40
+[[menus.main]]
+pageRef = '/s2'
+weight = 50
+[[menus.main]]
+pageRef = '/s3'
+weight = 60
+-- content/p1.md  --
+---
+title: P1_Title
+---
+-- content/p2.md  --
+---
+title: P2_Title
+---
+-- content/p3.md  --
+---
+title: P3_Title
+linkTitle: P3_LinkTitle
+---
+-- content/s1/_index.md --
+---
+title: S1_Title
+---
+-- content/s2/_index.md --
+---
+title: S2_Title
+---
+-- content/s3/_index.md --
+---
+title: S3_Title
+linkTitle: S3_LinkTitle
+---
+-- layouts/_default/single.html --
+{{ .Content }}
+-- layouts/_default/list.html --
+{{ .Content }}
+-- layouts/_default/home.html --
+{{- range site.Menus.main }}
+URL: {{ .URL }}| Name: {{ .Name }}| Title: {{ .Title }}| PageRef: {{ .PageRef }}| Page.Title: {{ .Page.Title }}| Page.LinkTitle: {{ .Page.LinkTitle }}|
+{{- end }}
+`
+
+	b := Test(t, files)
+	b.AssertFileContent("public/index.html",
+		`URL: /p1/| Name: P1_ME_Name| Title: P1_ME_Title| PageRef: /p1| Page.Title: P1_Title| Page.LinkTitle: P1_Title|`,
+		`URL: /p2/| Name: P2_Title| Title: P2_Title| PageRef: /p2| Page.Title: P2_Title| Page.LinkTitle: P2_Title|`,
+		`URL: /p3/| Name: P3_LinkTitle| Title: P3_Title| PageRef: /p3| Page.Title: P3_Title| Page.LinkTitle: P3_LinkTitle|`,
+		`URL: /s1/| Name: S1_ME_Name| Title: S1_ME_Title| PageRef: /s1| Page.Title: S1_Title| Page.LinkTitle: S1_Title|`,
+		`URL: /s2/| Name: S2_Title| Title: S2_Title| PageRef: /s2| Page.Title: S2_Title| Page.LinkTitle: S2_Title|`,
+		`URL: /s3/| Name: S3_LinkTitle| Title: S3_Title| PageRef: /s3| Page.Title: S3_Title| Page.LinkTitle: S3_LinkTitle|`,
+	)
+}

hugolib/site.go

@@ -1224,6 +1224,8 @@ func (s *Site) assembleMenus() error {
 			// If page is still nill, we must make sure that we have a URL that considers baseURL etc.
 			if types.IsNil(me.Page) {
 				me.ConfiguredURL = s.createNodeMenuEntryURL(me.MenuConfig.URL)
+			} else {
+				navigation.SetPageValues(me, me.Page)
 			}
 
 			flat[twoD{name, me.KeyName()}] = me