Add path, kind and lang to content front matter

Note that none of these can be set via cascade (you will get an error)

Fixes #11544

hugolib/params_test.go

@@ -13,7 +13,11 @@
 
 package hugolib
 
-import "testing"
+import (
+	"testing"
+
+	qt "github.com/frankban/quicktest"
+)
 
 func TestFrontMatterParamsInItsOwnSection(t *testing.T) {
 	t.Parallel()
@@ -52,3 +56,106 @@ Summary: {{ .Summary }}|
 		"Summary: frontmatter.summary|",
 	)
 }
+
+func TestFrontMatterParamsKindPath(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+baseURL = "https://example.org/"
+disableKinds = ["taxonomy", "term"]
+
+-- content/p1.md --
+---
+title: "P1"
+date: 2019-08-07
+path: "/a/b/c"
+slug: "s1"
+---
+-- content/mysection.md --
+---
+title: "My Section"
+kind: "section"
+date: 2022-08-07
+path: "/a/b"
+---
+-- layouts/index.html --
+RegularPages: {{ range site.RegularPages }}{{ .Path }}|{{ .RelPermalink }}|{{ .Title }}|{{ .Date.Format "2006-02-01" }}| Slug: {{ .Params.slug }}|{{ end }}$
+Sections: {{ range site.Sections }}{{ .Path }}|{{ .RelPermalink }}|{{ .Title }}|{{ .Date.Format "2006-02-01" }}| Slug: {{ .Params.slug }}|{{ end }}$
+{{ $ab := site.GetPage "a/b" }}
+a/b pages: {{ range $ab.RegularPages }}{{ .Path }}|{{ .RelPermalink }}|{{ end }}$
+`
+
+	b := Test(t, files)
+
+	b.AssertFileContent("public/index.html",
+		"RegularPages: /a/b/c|/a/b/s1/|P1|2019-07-08| Slug: s1|$",
+		"Sections: /a|/a/|As",
+		"a/b pages: /a/b/c|/a/b/s1/|$",
+	)
+}
+
+func TestFrontMatterParamsLang(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+baseURL = "https://example.org/"
+disableKinds = ["taxonomy", "term"]
+defaultContentLanguage = "en"
+defaultContentLanguageInSubdir = true
+[languages]
+[languages.en]
+weight = 1
+[languages.nn]
+weight = 2
+-- content/p1.md --
+---
+title: "P1 nn"
+lang: "nn"
+---
+-- content/p2.md --
+---
+title: "P2"
+---
+-- layouts/index.html --
+RegularPages: {{ range site.RegularPages }}{{ .Path }}|{{ .RelPermalink }}|{{ .Title }}|{{ end }}$
+
+`
+
+	b := Test(t, files)
+
+	b.AssertFileContent("public/en/index.html",
+		"RegularPages: /p2|/en/p2/|P2|$",
+	)
+	b.AssertFileContent("public/nn/index.html",
+		"RegularPages: /p1|/nn/p1/|P1 nn|$",
+	)
+}
+
+func TestFrontMatterParamsLangNoCascade(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+baseURL = "https://example.org/"
+disableKinds = ["taxonomy", "term"]
+defaultContentLanguage = "en"
+defaultContentLanguageInSubdir = true
+[languages]
+[languages.en]
+weight = 1
+[languages.nn]
+weight = 2
+-- content/_index.md --
++++
+[[cascade]]
+background = 'yosemite.jpg'
+lang = 'nn'
++++
+
+`
+
+	b, err := TestE(t, files)
+	b.Assert(err, qt.IsNotNil)
+}