Add support for a content dir set per language

A sample config:

```toml
defaultContentLanguage = "en"
defaultContentLanguageInSubdir = true

[Languages]
[Languages.en]
weight = 10
title = "In English"
languageName = "English"
contentDir = "content/english"

[Languages.nn]
weight = 20
title = "På Norsk"
languageName = "Norsk"
contentDir = "content/norwegian"
```

The value of `contentDir` can be any valid path, even absolute path references. The only restriction is that the content dirs cannot overlap.

The content files will be assigned a language by

1. The placement: `content/norwegian/post/my-post.md` will be read as Norwegian content.
2. The filename: `content/english/post/my-post.nn.md` will be read as Norwegian even if it lives in the English content folder.

The content directories will be merged into a big virtual filesystem with one simple rule: The most specific language file will win.
This means that if both `content/norwegian/post/my-post.md` and `content/english/post/my-post.nn.md` exists, they will be considered duplicates and the version inside `content/norwegian` will win.

Note that translations will be automatically assigned by Hugo by the content file's relative placement, so `content/norwegian/post/my-post.md` will be a translation of `content/english/post/my-post.md`.

If this does not work for you, you can connect the translations together by setting a `translationKey` in the content files' front matter.

Fixes #4523
Fixes #4552
Fixes #4553

1 files changed, 0 insertions, 54 deletions

diff --git a/hugolib/page_test.go b/hugolib/page_test.go
index d862dc8e9..2b679c842 100644
--- a/hugolib/page_test.go
+++ b/hugolib/page_test.go
@@ -1109,60 +1109,6 @@ func TestCreatePage(t *testing.T) {
 	}
 }
 
-func TestPageKind(t *testing.T) {
-	t.Parallel()
-	const sep = helpers.FilePathSeparator
-	var tests = []struct {
-		file string
-		kind string
-	}{
-		{"_index.md", KindHome},
-		{"about.md", KindPage},
-		{"sectionA" + sep + "_index.md", KindSection},
-		{"sectionA" + sep + "about.md", KindPage},
-		{"categories" + sep + "_index.md", KindTaxonomyTerm},
-		{"categories" + sep + "categoryA" + sep + "_index.md", KindTaxonomy},
-		{"tags" + sep + "_index.md", KindTaxonomyTerm},
-		{"tags" + sep + "tagA" + sep + "_index.md", KindTaxonomy},
-
-		// nn is configured as a language
-		{"_index.nn.md", KindHome},
-		{"about.nn.md", KindPage},
-		{"sectionA" + sep + "_index.nn.md", KindSection},
-		{"sectionA" + sep + "about.nn.md", KindPage},
-
-		// should NOT be categorized as KindHome
-		{"_indexNOT.md", KindPage},
-
-		// To be consistent with FileInfo.TranslationBaseName(),
-		// language codes not explicitly configured for the site
-		// are not treated as such. "fr" is not configured as
-		// a language in the test site, so ALL of the
-		// following should be KindPage
-		{"_index.fr.md", KindPage}, //not KindHome
-		{"about.fr.md", KindPage},
-		{"sectionA" + sep + "_index.fr.md", KindPage}, // KindSection
-		{"sectionA" + sep + "about.fr.md", KindPage},
-	}
-
-	for _, test := range tests {
-		s := newTestSite(t, "languages.nn.languageName", "Nynorsk")
-		taxonomies := make(map[string]string)
-		taxonomies["tag"] = "tags"
-		taxonomies["category"] = "categories"
-		s.Taxonomies = make(TaxonomyList)
-		for _, plural := range taxonomies {
-			s.Taxonomies[plural] = make(Taxonomy)
-		}
-
-		p, _ := s.NewPage(test.file)
-		p.setValuesForKind(s)
-		if p.Kind != test.kind {
-			t.Errorf("for %s expected p.Kind == %s, got %s", test.file, test.kind, p.Kind)
-		}
-	}
-}
-
 func TestDegenerateInvalidFrontMatterShortDelim(t *testing.T) {
 	t.Parallel()
 	var tests = []struct {