Fix paths with dots issue with content adapters

Fixes #12493

hugolib/page__new.go

@@ -62,7 +62,8 @@ func (h *HugoSites) newPage(m *pageMeta) (*pageState, *paths.Path, error) {
 
 	if pcfg.Path != "" {
 		s := m.pageConfig.Path
-		if !paths.HasExt(s) {
+		// Paths from content adapters should never have any extension.
+		if pcfg.IsFromContentAdapter || !paths.HasExt(s) {
 			var (
 				isBranch    bool
 				isBranchSet bool

hugolib/pagesfromdata/pagesfromgotmpl_integration_test.go

@@ -477,3 +477,20 @@ baseURL = "https://example.com"
 	b.AssertFileExists("public/docs/p1/index.html", true)
 	b.AssertFileExists("public/docs/p2/index.html", false)
 }
+
+func TestPagesFromGoPathsWithDotsIssue12493(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+disableKinds = ['home','section','rss','sitemap','taxonomy','term']
+-- content/_content.gotmpl --
+{{ .AddPage (dict "path" "s-1.2.3/p-4.5.6" "title" "p-4.5.6") }}
+-- layouts/_default/single.html --
+{{ .Title }}
+`
+
+	b := hugolib.Test(t, files)
+
+	b.AssertFileExists("public/s-1.2.3/p-4.5.6/index.html", true)
+}

resources/page/pagemeta/page_frontmatter.go

@@ -151,14 +151,6 @@ func (p *PageConfig) Compile(basePath string, pagesFromData bool, ext string, lo
 		p.Path = path.Join(basePath, p.Path)
 	}
 
-	if pagesFromData {
-		// Note that NormalizePathStringBasic will make sure that we don't preserve the unnormalized path.
-		// We do that when we create pages from the file system; mostly for backward compatibility,
-		// but also because people tend to use use the filename to name their resources (with spaces and all),
-		// and this isn't relevant when creating resources from an API where it's easy to add textual meta data.
-		p.Path = paths.NormalizePathStringBasic(p.Path)
-	}
-
 	if p.Content.Markup == "" && p.Content.MediaType == "" {
 		if ext == "" {
 			ext = "md"
@@ -190,6 +182,18 @@ func (p *PageConfig) Compile(basePath string, pagesFromData bool, ext string, lo
 		p.Content.Markup = p.ContentMediaType.SubType
 	}
 
+	if pagesFromData {
+		if p.Kind == "" {
+			p.Kind = kinds.KindPage
+		}
+
+		// Note that NormalizePathStringBasic will make sure that we don't preserve the unnormalized path.
+		// We do that when we create pages from the file system; mostly for backward compatibility,
+		// but also because people tend to use use the filename to name their resources (with spaces and all),
+		// and this isn't relevant when creating resources from an API where it's easy to add textual meta data.
+		p.Path = paths.NormalizePathStringBasic(p.Path)
+	}
+
 	if p.Cascade != nil {
 		cascade, err := page.DecodeCascade(logger, p.Cascade)
 		if err != nil {