Create a struct with all of Hugo's config options

Primary motivation is documentation, but it will also hopefully simplify the code.

Also,

* Lower case the default output format names; this is in line with the custom ones (map keys) and how
it's treated all the places. This avoids doing `stringds.EqualFold` everywhere.

Closes #10896
Closes #10620

1 files changed, 10 insertions, 4 deletions

diff --git a/markup/markup_config/config.go b/markup/markup_config/config.go
index 60446b9bc..0793669a7 100644
--- a/markup/markup_config/config.go
+++ b/markup/markup_config/config.go
@@ -28,14 +28,18 @@ import (
 type Config struct {
 	// Default markdown handler for md/markdown extensions.
 	// Default is "goldmark".
-	// Before Hugo 0.60 this was "blackfriday".
 	DefaultMarkdownHandler string
 
-	Highlight       highlight.Config
+	// The configuration used by code highlighters.
+	Highlight highlight.Config
+
+	// Table of contents configuration
 	TableOfContents tableofcontents.Config
 
-	// Content renderers
-	Goldmark    goldmark_config.Config
+	// Configuration for the Goldmark markdown engine.
+	Goldmark goldmark_config.Config
+
+	// Configuration for the Asciidoc external markdown engine.
 	AsciidocExt asciidocext_config.Config
 }
 
@@ -46,6 +50,8 @@ func Decode(cfg config.Provider) (conf Config, err error) {
 	if m == nil {
 		return
 	}
+	m = maps.CleanConfigStringMap(m)
+
 	normalizeConfig(m)
 
 	err = mapstructure.WeakDecode(m, &conf)