Add minify config

Fixes #6750
Updates #6892

minifiers/config.go

@@ -0,0 +1,111 @@
+// Copyright 2019 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package minifiers
+
+import (
+	"github.com/gohugoio/hugo/config"
+	"github.com/gohugoio/hugo/docshelper"
+	"github.com/gohugoio/hugo/parser"
+
+	"github.com/mitchellh/mapstructure"
+	"github.com/tdewolff/minify/v2/css"
+	"github.com/tdewolff/minify/v2/html"
+	"github.com/tdewolff/minify/v2/js"
+	"github.com/tdewolff/minify/v2/json"
+	"github.com/tdewolff/minify/v2/svg"
+	"github.com/tdewolff/minify/v2/xml"
+)
+
+var defaultTdewolffConfig = tdewolffConfig{
+	HTML: html.Minifier{
+		KeepDocumentTags:        true,
+		KeepConditionalComments: true,
+		KeepEndTags:             true,
+		KeepDefaultAttrVals:     true,
+		KeepWhitespace:          false,
+		// KeepQuotes:              false, >= v2.6.2
+	},
+	CSS: css.Minifier{
+		Decimals: -1, // will be deprecated
+		// Precision: 0,  // use Precision with >= v2.7.0
+		KeepCSS2: true,
+	},
+	JS:   js.Minifier{},
+	JSON: json.Minifier{},
+	SVG: svg.Minifier{
+		Decimals: -1, // will be deprecated
+		// Precision: 0,  // use Precision with >= v2.7.0
+	},
+	XML: xml.Minifier{
+		KeepWhitespace: false,
+	},
+}
+
+type tdewolffConfig struct {
+	HTML html.Minifier
+	CSS  css.Minifier
+	JS   js.Minifier
+	JSON json.Minifier
+	SVG  svg.Minifier
+	XML  xml.Minifier
+}
+
+type minifiersConfig struct {
+	EnableHTML bool
+	EnableCSS  bool
+	EnableJS   bool
+	EnableJSON bool
+	EnableSVG  bool
+	EnableXML  bool
+
+	Tdewolff tdewolffConfig
+}
+
+var defaultConfig = minifiersConfig{
+	EnableHTML: true,
+	EnableCSS:  true,
+	EnableJS:   true,
+	EnableJSON: true,
+	EnableSVG:  true,
+	EnableXML:  true,
+
+	Tdewolff: defaultTdewolffConfig,
+}
+
+func decodeConfig(cfg config.Provider) (conf minifiersConfig, err error) {
+	conf = defaultConfig
+
+	m := cfg.GetStringMap("minifiers")
+	if m == nil {
+		return
+	}
+
+	err = mapstructure.WeakDecode(m, &conf)
+
+	if err != nil {
+		return
+	}
+
+	return
+}
+
+func init() {
+	docsProvider := func() map[string]interface{} {
+		docs := make(map[string]interface{})
+		docs["minifiers"] = parser.LowerCaseCamelJSONMarshaller{Value: defaultConfig}
+		return docs
+
+	}
+	docshelper.AddDocProvider("config", docsProvider)
+}