diff options
Diffstat (limited to 'transform/livereloadinject/livereloadinject.go')
-rw-r--r-- | transform/livereloadinject/livereloadinject.go | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/transform/livereloadinject/livereloadinject.go b/transform/livereloadinject/livereloadinject.go new file mode 100644 index 000000000..e04b977f7 --- /dev/null +++ b/transform/livereloadinject/livereloadinject.go @@ -0,0 +1,47 @@ +// Copyright 2018 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 livereloadinject + +import ( + "bytes" + "fmt" + + "github.com/gohugoio/hugo/helpers" + "github.com/gohugoio/hugo/transform" +) + +// New creates a function that can be used +// to inject a script tag for the livereload JavaScript in a HTML document. +func New(port int) transform.Transformer { + return func(ft transform.FromTo) error { + b := ft.From().Bytes() + endBodyTag := "</body>" + match := []byte(endBodyTag) + replaceTemplate := `<script data-no-instant>document.write('<script src="/livereload.js?port=%d&mindelay=10"></' + 'script>')</script>%s` + replace := []byte(fmt.Sprintf(replaceTemplate, port, endBodyTag)) + + newcontent := bytes.Replace(b, match, replace, 1) + if len(newcontent) == len(b) { + endBodyTag = "</BODY>" + replace := []byte(fmt.Sprintf(replaceTemplate, port, endBodyTag)) + match := []byte(endBodyTag) + newcontent = bytes.Replace(b, match, replace, 1) + } + + if _, err := ft.To().Write(newcontent); err != nil { + helpers.DistinctWarnLog.Println("Failed to inject LiveReload script:", err) + } + return nil + } +} |