2016-06-04 07:45:56 -04:00
|
|
|
// Copyright 2016 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 transform
|
|
|
|
|
|
|
|
|
|
import (
|
|
|
|
|
"bytes"
|
|
|
|
|
"fmt"
|
|
|
|
|
"regexp"
|
|
|
|
|
|
|
|
|
|
"github.com/spf13/hugo/helpers"
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
var metaTagsCheck = regexp.MustCompile(`(?i)<meta\s+name=['|"]?generator['|"]?`)
|
|
|
|
|
var hugoGeneratorTag = fmt.Sprintf(`<meta name="generator" content="Hugo %s" />`, helpers.HugoVersion())
|
|
|
|
|
|
2016-07-06 17:23:44 -04:00
|
|
|
// HugoGeneratorInject injects a meta generator tag for Hugo if none present.
|
2016-06-04 07:45:56 -04:00
|
|
|
func HugoGeneratorInject(ct contentTransformer) {
|
|
|
|
|
if metaTagsCheck.Match(ct.Content()) {
|
2017-04-06 11:39:20 -04:00
|
|
|
if _, err := ct.Write(ct.Content()); err != nil {
|
|
|
|
|
helpers.DistinctWarnLog.Println("Failed to inject Hugo generator tag:", err)
|
|
|
|
|
}
|
2016-06-04 07:45:56 -04:00
|
|
|
return
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
head := "<head>"
|
|
|
|
|
replace := []byte(fmt.Sprintf("%s\n\t%s", head, hugoGeneratorTag))
|
|
|
|
|
newcontent := bytes.Replace(ct.Content(), []byte(head), replace, 1)
|
|
|
|
|
|
|
|
|
|
if len(newcontent) == len(ct.Content()) {
|
|
|
|
|
head := "<HEAD>"
|
|
|
|
|
replace := []byte(fmt.Sprintf("%s\n\t%s", head, hugoGeneratorTag))
|
|
|
|
|
newcontent = bytes.Replace(ct.Content(), []byte(head), replace, 1)
|
|
|
|
|
}
|
|
|
|
|
|
2017-04-06 11:39:20 -04:00
|
|
|
if _, err := ct.Write(newcontent); err != nil {
|
|
|
|
|
helpers.DistinctWarnLog.Println("Failed to inject Hugo generator tag:", err)
|
|
|
|
|
}
|
|
|
|
|
|
2016-06-04 07:45:56 -04:00
|
|
|
}
|
