2018-08-05 05:13:49 -04:00
|
|
|
// Copyright 2018 The Hugo Authors. All rights reserved.
|
2016-06-04 07:45:56 -04:00
|
|
|
//
|
|
|
|
|
// 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.
|
|
|
|
|
|
2018-08-05 05:13:49 -04:00
|
|
|
package metainject
|
2016-06-04 07:45:56 -04:00
|
|
|
|
|
|
|
|
import (
|
|
|
|
|
"bytes"
|
|
|
|
|
"fmt"
|
|
|
|
|
"regexp"
|
|
|
|
|
|
2018-11-26 04:11:22 -05:00
|
|
|
"github.com/gohugoio/hugo/common/hugo"
|
2023-06-16 02:17:42 -04:00
|
|
|
"github.com/gohugoio/hugo/common/loggers"
|
2018-08-05 05:13:49 -04:00
|
|
|
"github.com/gohugoio/hugo/transform"
|
2016-06-04 07:45:56 -04:00
|
|
|
)
|
|
|
|
|
|
2020-12-02 07:23:25 -05:00
|
|
|
var (
|
|
|
|
|
metaTagsCheck = regexp.MustCompile(`(?i)<meta\s+name=['|"]?generator['|"]?`)
|
2022-10-14 06:16:53 -04:00
|
|
|
hugoGeneratorTag = fmt.Sprintf(`<meta name="generator" content="Hugo %s">`, hugo.CurrentVersion)
|
2020-12-02 07:23:25 -05:00
|
|
|
)
|
2016-06-04 07:45:56 -04:00
|
|
|
|
2018-08-05 05:13:49 -04:00
|
|
|
// HugoGenerator injects a meta generator tag for Hugo if none present.
|
|
|
|
|
func HugoGenerator(ft transform.FromTo) error {
|
|
|
|
|
b := ft.From().Bytes()
|
|
|
|
|
if metaTagsCheck.Match(b) {
|
|
|
|
|
if _, err := ft.To().Write(b); err != nil {
|
2023-06-16 02:17:42 -04:00
|
|
|
loggers.Log().Warnf("Failed to inject Hugo generator tag: %s", err)
|
2017-04-06 11:39:20 -04:00
|
|
|
}
|
2018-08-05 05:13:49 -04:00
|
|
|
return nil
|
2016-06-04 07:45:56 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
head := "<head>"
|
|
|
|
|
replace := []byte(fmt.Sprintf("%s\n\t%s", head, hugoGeneratorTag))
|
2018-08-05 05:13:49 -04:00
|
|
|
newcontent := bytes.Replace(b, []byte(head), replace, 1)
|
2016-06-04 07:45:56 -04:00
|
|
|
|
2018-08-05 05:13:49 -04:00
|
|
|
if len(newcontent) == len(b) {
|
2016-06-04 07:45:56 -04:00
|
|
|
head := "<HEAD>"
|
|
|
|
|
replace := []byte(fmt.Sprintf("%s\n\t%s", head, hugoGeneratorTag))
|
2018-08-05 05:13:49 -04:00
|
|
|
newcontent = bytes.Replace(b, []byte(head), replace, 1)
|
2016-06-04 07:45:56 -04:00
|
|
|
}
|
|
|
|
|
|
2018-08-05 05:13:49 -04:00
|
|
|
if _, err := ft.To().Write(newcontent); err != nil {
|
2023-06-16 02:17:42 -04:00
|
|
|
loggers.Log().Warnf("Failed to inject Hugo generator tag: %s", err)
|
2017-04-06 11:39:20 -04:00
|
|
|
}
|
|
|
|
|
|
2018-08-05 05:13:49 -04:00
|
|
|
return nil
|
2016-06-04 07:45:56 -04:00
|
|
|
}
|
