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

3 files changed, 11 insertions, 36 deletions

diff --git a/tpl/transform/transform_test.go b/tpl/transform/transform_test.go
index 86ddb1259..d645ca8e2 100644
--- a/tpl/transform/transform_test.go
+++ b/tpl/transform/transform_test.go
@@ -19,17 +19,10 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/gohugoio/hugo/common/loggers"
 	"github.com/gohugoio/hugo/hugolib"
 	"github.com/gohugoio/hugo/tpl/transform"
-	"github.com/spf13/afero"
 
 	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/config"
-	"github.com/gohugoio/hugo/deps"
-	"github.com/gohugoio/hugo/helpers"
-	"github.com/gohugoio/hugo/hugofs"
-	"github.com/gohugoio/hugo/langs"
 )
 
 type tstNoStringer struct{}
@@ -254,21 +247,3 @@ func TestPlainify(t *testing.T) {
 		b.Assert(result, qt.Equals, test.expect)
 	}
 }
-
-func newDeps(cfg config.Provider) *deps.Deps {
-	cfg.Set("contentDir", "content")
-	cfg.Set("i18nDir", "i18n")
-
-	l := langs.NewLanguage("en", cfg)
-
-	cs, err := helpers.NewContentSpec(l, loggers.NewErrorLogger(), afero.NewMemMapFs(), nil)
-	if err != nil {
-		panic(err)
-	}
-
-	return &deps.Deps{
-		Cfg:         cfg,
-		Fs:          hugofs.NewMem(l),
-		ContentSpec: cs,
-	}
-}
diff --git a/tpl/transform/unmarshal.go b/tpl/transform/unmarshal.go
index f5ff63585..3936126ca 100644
--- a/tpl/transform/unmarshal.go
+++ b/tpl/transform/unmarshal.go
@@ -72,7 +72,7 @@ func (ns *Namespace) Unmarshal(args ...any) (any, error) {
 		}
 
 		return ns.cache.GetOrCreate(key, func() (any, error) {
-			f := metadecoders.FormatFromMediaType(r.MediaType())
+			f := metadecoders.FormatFromStrings(r.MediaType().Suffixes()...)
 			if f == "" {
 				return nil, fmt.Errorf("MIME %q not supported", r.MediaType())
 			}
diff --git a/tpl/transform/unmarshal_test.go b/tpl/transform/unmarshal_test.go
index e63f96de2..12774298a 100644
--- a/tpl/transform/unmarshal_test.go
+++ b/tpl/transform/unmarshal_test.go
@@ -105,26 +105,26 @@ func TestUnmarshal(t *testing.T) {
 		{`slogan = "Hugo Rocks!"`, nil, func(m map[string]any) {
 			assertSlogan(m)
 		}},
-		{testContentResource{key: "r1", content: `slogan: "Hugo Rocks!"`, mime: media.YAMLType}, nil, func(m map[string]any) {
+		{testContentResource{key: "r1", content: `slogan: "Hugo Rocks!"`, mime: media.Builtin.YAMLType}, nil, func(m map[string]any) {
 			assertSlogan(m)
 		}},
-		{testContentResource{key: "r1", content: `{ "slogan": "Hugo Rocks!" }`, mime: media.JSONType}, nil, func(m map[string]any) {
+		{testContentResource{key: "r1", content: `{ "slogan": "Hugo Rocks!" }`, mime: media.Builtin.JSONType}, nil, func(m map[string]any) {
 			assertSlogan(m)
 		}},
-		{testContentResource{key: "r1", content: `slogan = "Hugo Rocks!"`, mime: media.TOMLType}, nil, func(m map[string]any) {
+		{testContentResource{key: "r1", content: `slogan = "Hugo Rocks!"`, mime: media.Builtin.TOMLType}, nil, func(m map[string]any) {
 			assertSlogan(m)
 		}},
-		{testContentResource{key: "r1", content: `<root><slogan>Hugo Rocks!</slogan></root>"`, mime: media.XMLType}, nil, func(m map[string]any) {
+		{testContentResource{key: "r1", content: `<root><slogan>Hugo Rocks!</slogan></root>"`, mime: media.Builtin.XMLType}, nil, func(m map[string]any) {
 			assertSlogan(m)
 		}},
 		{testContentResource{key: "r1", content: `1997,Ford,E350,"ac, abs, moon",3000.00
-1999,Chevy,"Venture ""Extended Edition""","",4900.00`, mime: media.CSVType}, nil, func(r [][]string) {
+1999,Chevy,"Venture ""Extended Edition""","",4900.00`, mime: media.Builtin.CSVType}, nil, func(r [][]string) {
 			b.Assert(len(r), qt.Equals, 2)
 			first := r[0]
 			b.Assert(len(first), qt.Equals, 5)
 			b.Assert(first[1], qt.Equals, "Ford")
 		}},
-		{testContentResource{key: "r1", content: `a;b;c`, mime: media.CSVType}, map[string]any{"delimiter": ";"}, func(r [][]string) {
+		{testContentResource{key: "r1", content: `a;b;c`, mime: media.Builtin.CSVType}, map[string]any{"delimiter": ";"}, func(r [][]string) {
 			b.Assert([][]string{{"a", "b", "c"}}, qt.DeepEquals, r)
 		}},
 		{"a,b,c", nil, func(r [][]string) {
@@ -135,13 +135,13 @@ func TestUnmarshal(t *testing.T) {
 		}},
 		{testContentResource{key: "r1", content: `
 % This is a comment
-a;b;c`, mime: media.CSVType}, map[string]any{"DElimiter": ";", "Comment": "%"}, func(r [][]string) {
+a;b;c`, mime: media.Builtin.CSVType}, map[string]any{"DElimiter": ";", "Comment": "%"}, func(r [][]string) {
 			b.Assert([][]string{{"a", "b", "c"}}, qt.DeepEquals, r)
 		}},
 		// errors
 		{"thisisnotavaliddataformat", nil, false},
-		{testContentResource{key: "r1", content: `invalid&toml"`, mime: media.TOMLType}, nil, false},
-		{testContentResource{key: "r1", content: `unsupported: MIME"`, mime: media.CalendarType}, nil, false},
+		{testContentResource{key: "r1", content: `invalid&toml"`, mime: media.Builtin.TOMLType}, nil, false},
+		{testContentResource{key: "r1", content: `unsupported: MIME"`, mime: media.Builtin.CalendarType}, nil, false},
 		{"thisisnotavaliddataformat", nil, false},
 		{`{ notjson }`, nil, false},
 		{tstNoStringer{}, nil, false},
@@ -217,7 +217,7 @@ func BenchmarkUnmarshalResource(b *testing.B) {
 	var jsons [numJsons]testContentResource
 	for i := 0; i < numJsons; i++ {
 		key := fmt.Sprintf("root%d", i)
-		jsons[i] = testContentResource{key: key, content: strings.Replace(testJSON, "ROOT_KEY", key, 1), mime: media.JSONType}
+		jsons[i] = testContentResource{key: key, content: strings.Replace(testJSON, "ROOT_KEY", key, 1), mime: media.Builtin.JSONType}
 	}
 
 	b.ResetTimer()