mirror of
https://github.com/gohugoio/hugo.git
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47 lines
1.6 KiB
Go
47 lines
1.6 KiB
Go
// Copyright 2018 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package livereloadinject
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import (
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"bytes"
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"fmt"
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"github.com/gohugoio/hugo/helpers"
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"github.com/gohugoio/hugo/transform"
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)
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// New creates a function that can be used
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// to inject a script tag for the livereload JavaScript in a HTML document.
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func New(port int) transform.Transformer {
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return func(ft transform.FromTo) error {
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b := ft.From().Bytes()
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endBodyTag := "</body>"
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match := []byte(endBodyTag)
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replaceTemplate := `<script data-no-instant>document.write('<script src="/livereload.js?port=%d&mindelay=10&v=2"></' + 'script>')</script>%s`
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replace := []byte(fmt.Sprintf(replaceTemplate, port, endBodyTag))
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newcontent := bytes.Replace(b, match, replace, 1)
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if len(newcontent) == len(b) {
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endBodyTag = "</BODY>"
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replace := []byte(fmt.Sprintf(replaceTemplate, port, endBodyTag))
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match := []byte(endBodyTag)
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newcontent = bytes.Replace(b, match, replace, 1)
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}
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if _, err := ft.To().Write(newcontent); err != nil {
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helpers.DistinctWarnLog.Println("Failed to inject LiveReload script:", err)
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}
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return nil
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}
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}
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