Create pages from _content.gotmpl

Closes #12427
Closes #12485
Closes #6310
Closes #5074

4 files changed, 35 insertions, 1 deletions

diff --git a/config/allconfig/allconfig.go b/config/allconfig/allconfig.go
index d5d3dc4e7..76153f5c0 100644
--- a/config/allconfig/allconfig.go
+++ b/config/allconfig/allconfig.go
@@ -367,6 +367,7 @@ func (c *Config) CompileConfig(logger loggers.Logger) error {
 		DisabledLanguages: disabledLangs,
 		IgnoredLogs:       ignoredLogIDs,
 		KindOutputFormats: kindOutputFormats,
+		ContentTypes:      media.DefaultContentTypes.FromTypes(c.MediaTypes.Config),
 		CreateTitle:       helpers.GetTitleFunc(c.TitleCaseStyle),
 		IsUglyURLSection:  isUglyURL,
 		IgnoreFile:        ignoreFile,
@@ -402,6 +403,7 @@ type ConfigCompiled struct {
 	BaseURLLiveReload urls.BaseURL
 	ServerInterface   string
 	KindOutputFormats map[string]output.Formats
+	ContentTypes      media.ContentTypes
 	DisabledKinds     map[string]bool
 	DisabledLanguages map[string]bool
 	IgnoredLogs       map[string]bool
@@ -759,7 +761,7 @@ func (c *Configs) Init() error {
 	c.Languages = languages
 	c.LanguagesDefaultFirst = languagesDefaultFirst
 
-	c.ContentPathParser = &paths.PathParser{LanguageIndex: languagesDefaultFirst.AsIndexSet(), IsLangDisabled: c.Base.IsLangDisabled}
+	c.ContentPathParser = &paths.PathParser{LanguageIndex: languagesDefaultFirst.AsIndexSet(), IsLangDisabled: c.Base.IsLangDisabled, IsContentExt: c.Base.C.ContentTypes.IsContentSuffix}
 
 	c.configLangs = make([]config.AllProvider, len(c.Languages))
 	for i, l := range c.LanguagesDefaultFirst {
diff --git a/config/allconfig/allconfig_integration_test.go b/config/allconfig/allconfig_integration_test.go
index 4f2f1a06e..af4655fe8 100644
--- a/config/allconfig/allconfig_integration_test.go
+++ b/config/allconfig/allconfig_integration_test.go
@@ -84,3 +84,21 @@ logPathWarnings = true
 	b.Assert(conf.PrintI18nWarnings, qt.Equals, true)
 	b.Assert(conf.PrintPathWarnings, qt.Equals, true)
 }
+
+func TestRedefineContentTypes(t *testing.T) {
+	files := `
+-- hugo.toml --
+baseURL = "https://example.com"
+[mediaTypes]
+[mediaTypes."text/html"]
+suffixes = ["html", "xhtml"]
+`
+
+	b := hugolib.Test(t, files)
+
+	conf := b.H.Configs.Base
+	contentTypes := conf.C.ContentTypes
+
+	b.Assert(contentTypes.HTML.Suffixes(), qt.DeepEquals, []string{"html", "xhtml"})
+	b.Assert(contentTypes.Markdown.Suffixes(), qt.DeepEquals, []string{"md", "mdown", "markdown"})
+}
diff --git a/config/allconfig/configlanguage.go b/config/allconfig/configlanguage.go
index c7f1c276a..a215fb5e4 100644
--- a/config/allconfig/configlanguage.go
+++ b/config/allconfig/configlanguage.go
@@ -144,6 +144,10 @@ func (c ConfigLanguage) NewIdentityManager(name string) identity.Manager {
 	return identity.NewManager(name)
 }
 
+func (c ConfigLanguage) ContentTypes() config.ContentTypesProvider {
+	return c.config.C.ContentTypes
+}
+
 // GetConfigSection is mostly used in tests. The switch statement isn't complete, but what's in use.
 func (c ConfigLanguage) GetConfigSection(s string) any {
 	switch s {
diff --git a/config/configProvider.go b/config/configProvider.go
index 8f74202ab..ba10d44dd 100644
--- a/config/configProvider.go
+++ b/config/configProvider.go
@@ -41,6 +41,7 @@ type AllProvider interface {
 	Dirs() CommonDirs
 	Quiet() bool
 	DirsBase() CommonDirs
+	ContentTypes() ContentTypesProvider
 	GetConfigSection(string) any
 	GetConfig() any
 	CanonifyURLs() bool
@@ -75,6 +76,15 @@ type AllProvider interface {
 	EnableEmoji() bool
 }
 
+// We cannot import the media package as that would create a circular dependency.
+// This interface defineds a sub set of what media.ContentTypes provides.
+type ContentTypesProvider interface {
+	IsContentSuffix(suffix string) bool
+	IsContentFile(filename string) bool
+	IsIndexContentFile(filename string) bool
+	IsHTMLSuffix(suffix string) bool
+}
+
 // Provider provides the configuration settings for Hugo.
 type Provider interface {
 	GetString(key string) string