parser/metadecoders: Consolidate the metadata decoders

See #5324

2 files changed, 14 insertions, 26 deletions

diff --git a/tpl/transform/remarshal.go b/tpl/transform/remarshal.go
index 490def5f3..d5fe96ac6 100644
--- a/tpl/transform/remarshal.go
+++ b/tpl/transform/remarshal.go
@@ -6,6 +6,7 @@ import (
 	"strings"
 
 	"github.com/gohugoio/hugo/parser"
+	"github.com/gohugoio/hugo/parser/metadecoders"
 	"github.com/spf13/cast"
 )
 
@@ -38,21 +39,7 @@ func (ns *Namespace) Remarshal(format string, data interface{}) (string, error)
 		return "", err
 	}
 
-	var metaHandler func(d []byte) (map[string]interface{}, error)
-
-	switch fromFormat {
-	case "yaml":
-		metaHandler = parser.HandleYAMLMetaData
-	case "toml":
-		metaHandler = parser.HandleTOMLMetaData
-	case "json":
-		metaHandler = parser.HandleJSONMetaData
-	}
-
-	meta, err := metaHandler([]byte(from))
-	if err != nil {
-		return "", err
-	}
+	meta, err := metadecoders.UnmarshalToMap([]byte(from), fromFormat)
 
 	var result bytes.Buffer
 	if err := parser.InterfaceToConfig(meta, mark, &result); err != nil {
@@ -76,21 +63,21 @@ func toFormatMark(format string) (rune, error) {
 	return 0, errors.New("failed to detect target data serialization format")
 }
 
-func detectFormat(data string) (string, error) {
+func detectFormat(data string) (metadecoders.Format, error) {
 	jsonIdx := strings.Index(data, "{")
 	yamlIdx := strings.Index(data, ":")
 	tomlIdx := strings.Index(data, "=")
 
 	if jsonIdx != -1 && (yamlIdx == -1 || jsonIdx < yamlIdx) && (tomlIdx == -1 || jsonIdx < tomlIdx) {
-		return "json", nil
+		return metadecoders.JSON, nil
 	}
 
 	if yamlIdx != -1 && (tomlIdx == -1 || yamlIdx < tomlIdx) {
-		return "yaml", nil
+		return metadecoders.YAML, nil
 	}
 
 	if tomlIdx != -1 {
-		return "toml", nil
+		return metadecoders.TOML, nil
 	}
 
 	return "", errors.New("failed to detect data serialization format")
diff --git a/tpl/transform/remarshal_test.go b/tpl/transform/remarshal_test.go
index 07c51c3b0..1416afff3 100644
--- a/tpl/transform/remarshal_test.go
+++ b/tpl/transform/remarshal_test.go
@@ -18,6 +18,7 @@ import (
 	"testing"
 
 	"github.com/gohugoio/hugo/helpers"
+	"github.com/gohugoio/hugo/parser/metadecoders"
 	"github.com/spf13/viper"
 	"github.com/stretchr/testify/require"
 )
@@ -179,12 +180,12 @@ func TestRemarshalDetectFormat(t *testing.T) {
 		data   string
 		expect interface{}
 	}{
-		{`foo = "bar"`, "toml"},
-		{`   foo = "bar"`, "toml"},
-		{`foo="bar"`, "toml"},
-		{`foo: "bar"`, "yaml"},
-		{`foo:"bar"`, "yaml"},
-		{`{ "foo": "bar"`, "json"},
+		{`foo = "bar"`, metadecoders.TOML},
+		{`   foo = "bar"`, metadecoders.TOML},
+		{`foo="bar"`, metadecoders.TOML},
+		{`foo: "bar"`, metadecoders.YAML},
+		{`foo:"bar"`, metadecoders.YAML},
+		{`{ "foo": "bar"`, metadecoders.JSON},
 		{`asdfasdf`, false},
 		{``, false},
 	} {
@@ -198,6 +199,6 @@ func TestRemarshalDetectFormat(t *testing.T) {
 		}
 
 		assert.NoError(err, errMsg)
-		assert.Equal(test.expect, result, errMsg)
+		assert.Equal(test.expect, result)
 	}
 }