cmd/soong_build/writedocs.go - SHIFTPHONES/android_build_soong - Gitiles

 // Copyright 2017 Google Inc. 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 main

 import (
 	"android/soong/android"
 	"bytes"
 	"html/template"
 	"io/ioutil"
 	"path/filepath"
 	"reflect"
 	"sort"

 	"github.com/google/blueprint/bootstrap"
 	"github.com/google/blueprint/bootstrap/bpdoc"
 )

 type perPackageTemplateData struct {
 	Name    string
 	Modules []moduleTypeTemplateData
 }

 type moduleTypeTemplateData struct {
 	Name       string
 	Synopsis   template.HTML
 	Properties []bpdoc.Property
 }

 // The properties in this map are displayed first, according to their rank.
 // TODO(jungjw): consider providing module type-dependent ranking
 var propertyRank = map[string]int{
 	"name":             0,
 	"src":              1,
 	"srcs":             2,
 	"defaults":         3,
 	"host_supported":   4,
 	"device_supported": 5,
 }

 // For each module type, extract its documentation and convert it to the template data.
 func moduleTypeDocsToTemplates(moduleTypeList []*bpdoc.ModuleType) []moduleTypeTemplateData {
 	result := make([]moduleTypeTemplateData, 0)

 	// Combine properties from all PropertyStruct's and reorder them -- first the ones
 	// with rank, then the rest of the properties in alphabetic order.
 	for _, m := range moduleTypeList {
 		item := moduleTypeTemplateData{
 			Name:       m.Name,
 			Synopsis:   m.Text,
 			Properties: make([]bpdoc.Property, 0),
 		}
 		props := make([]bpdoc.Property, 0)
 		for _, propStruct := range m.PropertyStructs {
 			props = append(props, propStruct.Properties...)
 		}
 		sort.Slice(props, func(i, j int) bool {
 			if rankI, ok := propertyRank[props[i].Name]; ok {
 				if rankJ, ok := propertyRank[props[j].Name]; ok {
 					return rankI < rankJ
 				} else {
 					return true
 				}
 			}
 			if _, ok := propertyRank[props[j].Name]; ok {
 				return false
 			}
 			return props[i].Name < props[j].Name
 		})
 		// Eliminate top-level duplicates. TODO(jungjw): improve bpdoc to handle this.
 		previousPropertyName := ""
 		for _, prop := range props {
 			if prop.Name == previousPropertyName {
 				oldProp := &item.Properties[len(item.Properties)-1].Properties
 				bpdoc.CollapseDuplicateProperties(oldProp, &prop.Properties)
 			} else {
 				item.Properties = append(item.Properties, prop)
 			}
 			previousPropertyName = prop.Name
 		}
 		result = append(result, item)
 	}
 	sort.Slice(result, func(i, j int) bool { return result[i].Name < result[j].Name })
 	return result
 }

 func writeDocs(ctx *android.Context, filename string) error {
 	moduleTypeFactories := android.ModuleTypeFactories()
 	bpModuleTypeFactories := make(map[string]reflect.Value)
 	for moduleType, factory := range moduleTypeFactories {
 		bpModuleTypeFactories[moduleType] = reflect.ValueOf(factory)
 	}

 	packages, err := bootstrap.ModuleTypeDocs(ctx.Context, bpModuleTypeFactories)
 	if err != nil {
 		return err
 	}

 	// Produce the top-level, package list page first.
 	tmpl := template.Must(template.Must(template.New("file").Parse(packageListTemplate)).Parse(copyBaseUrl))
 	buf := &bytes.Buffer{}
 	err = tmpl.Execute(buf, packages)
 	if err == nil {
 		err = ioutil.WriteFile(filename, buf.Bytes(), 0666)
 	}

 	// Now, produce per-package module lists with detailed information.
 	for _, pkg := range packages {
 		// We need a module name getter/setter function because I couldn't
 		// find a way to keep it in a variable defined within the template.
 		currentModuleName := ""
 		tmpl := template.Must(
 			template.Must(template.New("file").Funcs(map[string]interface{}{
 				"setModule": func(moduleName string) string {
 					currentModuleName = moduleName
 					return ""
 				},
 				"getModule": func() string {
 					return currentModuleName
 				},
 			}).Parse(perPackageTemplate)).Parse(copyBaseUrl))
 		buf := &bytes.Buffer{}
 		modules := moduleTypeDocsToTemplates(pkg.ModuleTypes)
 		data := perPackageTemplateData{Name: pkg.Name, Modules: modules}
 		err = tmpl.Execute(buf, data)
 		if err != nil {
 			return err
 		}
 		pkgFileName := filepath.Join(filepath.Dir(filename), pkg.Name+".html")
 		err = ioutil.WriteFile(pkgFileName, buf.Bytes(), 0666)
 		if err != nil {
 			return err
 		}
 	}
 	return err
 }

 // TODO(jungjw): Consider ordering by name.
 const (
 	packageListTemplate = `
 <html>
 <head>
 <title>Build Docs</title>
 <style>
 #main {
   padding: 48px;
 }

 table{
   table-layout: fixed;
 }

 td {
   word-wrap:break-word;
 }

 /* The following entries are copied from source.android.com's css file. */
 td,td code {
     color: #202124
 }

 th,th code {
     color: #fff;
     font: 500 16px/24px Roboto,sans-serif
 }

 td,table.responsive tr:not(.alt) td td:first-child,table.responsive td tr:not(.alt) td:first-child {
     background: rgba(255,255,255,.95);
     vertical-align: top
 }

 td,td code {
     padding: 7px 8px 8px
 }

 tr {
     border: 0;
     background: #78909c;
     border-top: 1px solid #cfd8dc
 }

 th,td {
     border: 0;
     margin: 0;
     text-align: left
 }

 th {
     height: 48px;
     padding: 8px;
     vertical-align: middle
 }

 table {
     border: 0;
     border-collapse: collapse;
     border-spacing: 0;
     font: 14px/20px Roboto,sans-serif;
     margin: 16px 0;
     width: 100%
 }

 h1 {
     color: #80868b;
     font: 300 34px/40px Roboto,sans-serif;
     letter-spacing: -0.01em;
     margin: 40px 0 20px
 }

 h1,h2,h3,h4,h5,h6 {
     overflow: hidden;
     padding: 0;
     text-overflow: ellipsis
 }

 :link,:visited {
     color: #039be5;
     outline: 0;
     text-decoration: none
 }

 body,html {
     color: #202124;
     font: 400 16px/24px Roboto,sans-serif;
     -moz-osx-font-smoothing: grayscale;
     -webkit-font-smoothing: antialiased;
     height: 100%;
     margin: 0;
     -webkit-text-size-adjust: 100%;
     -moz-text-size-adjust: 100%;
     -ms-text-size-adjust: 100%;
     text-size-adjust: 100%
 }

 html {
     -webkit-box-sizing: border-box;
     box-sizing: border-box
 }

 *,*::before,*::after {
     -webkit-box-sizing: inherit;
     box-sizing: inherit
 }

 body,div,dl,dd,form,img,input,figure,menu {
     margin: 0;
     padding: 0
 }
 </style>
 {{template "copyBaseUrl"}}
 </head>
 <body>
 <div id="main">
 <H1>Soong Modules Reference</H1>
 The latest versions of Android use the Soong build system, which greatly simplifies build
 configuration over the previous Make-based system. This site contains the generated reference
 files for the Soong build system.

 <table class="module_types" summary="Table of Soong module types sorted by package">
   <thead>
     <tr>
       <th style="width:20%">Package</th>
       <th style="width:80%">Module types</th>
     </tr>
   </thead>
   <tbody>
     {{range $pkg := .}}
       <tr>
         <td>{{.Path}}</td>
         <td>
         {{range $i, $mod := .ModuleTypes}}{{if $i}}, {{end}}<a href="{{$pkg.Name}}.html#{{$mod.Name}}">{{$mod.Name}}</a>{{end}}
         </td>
       </tr>
     {{end}}
   </tbody>
 </table>
 </div>
 </body>
 </html>
 `

 	perPackageTemplate = `
 <html>
 <head>
 <title>Build Docs</title>
 <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css">
 <style>
 .accordion,.simple{margin-left:1.5em;text-indent:-1.5em;margin-top:.25em}
 .collapsible{border-width:0 0 0 1;margin-left:.25em;padding-left:.25em;border-style:solid;
   border-color:grey;display:none;}
 span.fixed{display: block; float: left; clear: left; width: 1em;}
 ul {
 	list-style-type: none;
   margin: 0;
   padding: 0;
   width: 30ch;
   background-color: #f1f1f1;
   position: fixed;
   height: 100%;
   overflow: auto;
 }
 li a {
   display: block;
   color: #000;
   padding: 8px 16px;
   text-decoration: none;
 }

 li a.active {
   background-color: #4CAF50;
   color: white;
 }

 li a:hover:not(.active) {
   background-color: #555;
   color: white;
 }
 </style>
 {{template "copyBaseUrl"}}
 </head>
 <body>
 {{- /* Fixed sidebar with module types */ -}}
 <ul>
 <li><h3>{{.Name}} package</h3></li>
 {{range $moduleType := .Modules}}<li><a href="{{$.Name}}.html#{{$moduleType.Name}}">{{$moduleType.Name}}</a></li>
 {{end -}}
 </ul>
 {{/* Main panel with H1 section per module type */}}
 <div style="margin-left:30ch;padding:1px 16px;">
 {{range $moduleType := .Modules}}
 	{{setModule $moduleType.Name}}
 	<p>
   <h2 id="{{$moduleType.Name}}">{{$moduleType.Name}}</h2>
   {{if $moduleType.Synopsis }}{{$moduleType.Synopsis}}{{else}}<i>Missing synopsis</i>{{end}}
   {{- /* Comma-separated list of module attributes' links module attributes */ -}}
 	<div class="breadcrumb">
     {{range $i,$prop := $moduleType.Properties }}
 				{{ if gt $i 0 }},&nbsp;{{end -}}
 				<a href={{$.Name}}.html#{{getModule}}.{{$prop.Name}}>{{$prop.Name}}</a>
 		{{- end -}}
   </div>
 	{{- /* Property description */ -}}
 	{{- template "properties" $moduleType.Properties -}}
 {{- end -}}

 {{define "properties" -}}
   {{range .}}
     {{if .Properties -}}
       <div class="accordion"  id="{{getModule}}.{{.Name}}">
         <span class="fixed">&#x2295</span><b>{{.Name}}</b>
         {{- range .OtherNames -}}, {{.}}{{- end -}}
       </div>
       <div class="collapsible">
         {{- .Text}} {{range .OtherTexts}}{{.}}{{end}}
         {{template "properties" .Properties -}}
       </div>
     {{- else -}}
       <div class="simple" id="{{getModule}}.{{.Name}}">
         <span class="fixed">&nbsp;</span><b>{{.Name}} {{range .OtherNames}}, {{.}}{{end -}}</b>
         <i>{{.Type}}</i>
         {{- if .Text -}}{{if ne .Text "\n"}}, {{end}}{{.Text}}{{- end -}}
         {{- with .OtherTexts -}}{{.}}{{- end -}}
 	{{- if .Default -}}<i>Default: {{.Default}}</i>{{- end -}}
       </div>
     {{- end}}
   {{- end -}}
 {{- end -}}
 </div>
 <script>
   accordions = document.getElementsByClassName('accordion');
   for (i=0; i < accordions.length; ++i) {
     accordions[i].addEventListener("click", function() {
       var panel = this.nextElementSibling;
       var child = this.firstElementChild;
       if (panel.style.display === "block") {
           panel.style.display = "none";
           child.textContent = '\u2295';
       } else {
           panel.style.display = "block";
           child.textContent = '\u2296';
       }
     });
   }
 </script>
 </body>
 `

 	copyBaseUrl = `
 {{define "copyBaseUrl"}}
 <script type="text/javascript">
 window.addEventListener('message', (e) => {
   if (e != null && e.data != null && e.data.type === "SET_BASE" && e.data.base != null) {
     const existingBase = document.querySelector('base');
     if (existingBase != null) {
       existingBase.parentElement.removeChild(existingBase);
     }

     const base = document.createElement('base');
     base.setAttribute('href', e.data.base);
     document.head.appendChild(base);
   }
 });
 </script>
 {{end}}
 `
 )
	// Copyright 2017 Google Inc. 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 main

	import (
	"android/soong/android"
	"bytes"
	"html/template"
	"io/ioutil"
	"path/filepath"
	"reflect"
	"sort"

	"github.com/google/blueprint/bootstrap"
	"github.com/google/blueprint/bootstrap/bpdoc"
	)

	type perPackageTemplateData struct {
	Name string
	Modules []moduleTypeTemplateData
	}

	type moduleTypeTemplateData struct {
	Name string
	Synopsis template.HTML
	Properties []bpdoc.Property
	}

	// The properties in this map are displayed first, according to their rank.
	// TODO(jungjw): consider providing module type-dependent ranking
	var propertyRank = map[string]int{
	"name": 0,
	"src": 1,
	"srcs": 2,
	"defaults": 3,
	"host_supported": 4,
	"device_supported": 5,
	}

	// For each module type, extract its documentation and convert it to the template data.
	func moduleTypeDocsToTemplates(moduleTypeList []*bpdoc.ModuleType) []moduleTypeTemplateData {
	result := make([]moduleTypeTemplateData, 0)

	// Combine properties from all PropertyStruct's and reorder them -- first the ones
	// with rank, then the rest of the properties in alphabetic order.
	for _, m := range moduleTypeList {
	item := moduleTypeTemplateData{
	Name: m.Name,
	Synopsis: m.Text,
	Properties: make([]bpdoc.Property, 0),
	}
	props := make([]bpdoc.Property, 0)
	for _, propStruct := range m.PropertyStructs {
	props = append(props, propStruct.Properties...)
	}
	sort.Slice(props, func(i, j int) bool {
	if rankI, ok := propertyRank[props[i].Name]; ok {
	if rankJ, ok := propertyRank[props[j].Name]; ok {
	return rankI < rankJ
	} else {
	return true
	}
	}
	if _, ok := propertyRank[props[j].Name]; ok {
	return false
	}
	return props[i].Name < props[j].Name
	})
	// Eliminate top-level duplicates. TODO(jungjw): improve bpdoc to handle this.
	previousPropertyName := ""
	for _, prop := range props {
	if prop.Name == previousPropertyName {
	oldProp := &item.Properties[len(item.Properties)-1].Properties
	bpdoc.CollapseDuplicateProperties(oldProp, &prop.Properties)
	} else {
	item.Properties = append(item.Properties, prop)
	}
	previousPropertyName = prop.Name
	}
	result = append(result, item)
	}
	sort.Slice(result, func(i, j int) bool { return result[i].Name < result[j].Name })
	return result
	}

	func writeDocs(ctx *android.Context, filename string) error {
	moduleTypeFactories := android.ModuleTypeFactories()
	bpModuleTypeFactories := make(map[string]reflect.Value)
	for moduleType, factory := range moduleTypeFactories {
	bpModuleTypeFactories[moduleType] = reflect.ValueOf(factory)
	}

	packages, err := bootstrap.ModuleTypeDocs(ctx.Context, bpModuleTypeFactories)
	if err != nil {
	return err
	}

	// Produce the top-level, package list page first.
	tmpl := template.Must(template.Must(template.New("file").Parse(packageListTemplate)).Parse(copyBaseUrl))
	buf := &bytes.Buffer{}
	err = tmpl.Execute(buf, packages)
	if err == nil {
	err = ioutil.WriteFile(filename, buf.Bytes(), 0666)
	}

	// Now, produce per-package module lists with detailed information.
	for _, pkg := range packages {
	// We need a module name getter/setter function because I couldn't
	// find a way to keep it in a variable defined within the template.
	currentModuleName := ""
	tmpl := template.Must(
	template.Must(template.New("file").Funcs(map[string]interface{}{
	"setModule": func(moduleName string) string {
	currentModuleName = moduleName
	return ""
	},
	"getModule": func() string {
	return currentModuleName
	},
	}).Parse(perPackageTemplate)).Parse(copyBaseUrl))
	buf := &bytes.Buffer{}
	modules := moduleTypeDocsToTemplates(pkg.ModuleTypes)
	data := perPackageTemplateData{Name: pkg.Name, Modules: modules}
	err = tmpl.Execute(buf, data)
	if err != nil {
	return err
	}
	pkgFileName := filepath.Join(filepath.Dir(filename), pkg.Name+".html")
	err = ioutil.WriteFile(pkgFileName, buf.Bytes(), 0666)
	if err != nil {
	return err
	}
	}
	return err
	}

	// TODO(jungjw): Consider ordering by name.
	const (
	packageListTemplate = `
	<html>
	<head>
	<title>Build Docs</title>
	<style>
	#main {
	padding: 48px;
	}

	table{
	table-layout: fixed;
	}

	td {
	word-wrap:break-word;
	}

	/* The following entries are copied from source.android.com's css file. */
	td,td code {
	color: #202124
	}

	th,th code {
	color: #fff;
	font: 500 16px/24px Roboto,sans-serif
	}

	td,table.responsive tr:not(.alt) td td:first-child,table.responsive td tr:not(.alt) td:first-child {
	background: rgba(255,255,255,.95);
	vertical-align: top
	}

	td,td code {
	padding: 7px 8px 8px
	}

	tr {
	border: 0;
	background: #78909c;
	border-top: 1px solid #cfd8dc
	}

	th,td {
	border: 0;
	margin: 0;
	text-align: left
	}

	th {
	height: 48px;
	padding: 8px;
	vertical-align: middle
	}

	table {
	border: 0;
	border-collapse: collapse;
	border-spacing: 0;
	font: 14px/20px Roboto,sans-serif;
	margin: 16px 0;
	width: 100%
	}

	h1 {
	color: #80868b;
	font: 300 34px/40px Roboto,sans-serif;
	letter-spacing: -0.01em;
	margin: 40px 0 20px
	}

	h1,h2,h3,h4,h5,h6 {
	overflow: hidden;
	padding: 0;
	text-overflow: ellipsis
	}

	:link,:visited {
	color: #039be5;
	outline: 0;
	text-decoration: none
	}

	body,html {
	color: #202124;
	font: 400 16px/24px Roboto,sans-serif;
	-moz-osx-font-smoothing: grayscale;
	-webkit-font-smoothing: antialiased;
	height: 100%;
	margin: 0;
	-webkit-text-size-adjust: 100%;
	-moz-text-size-adjust: 100%;
	-ms-text-size-adjust: 100%;
	text-size-adjust: 100%
	}

	html {
	-webkit-box-sizing: border-box;
	box-sizing: border-box
	}

	,::before,*::after {
	-webkit-box-sizing: inherit;
	box-sizing: inherit
	}

	body,div,dl,dd,form,img,input,figure,menu {
	margin: 0;
	padding: 0
	}
	</style>
	{{template "copyBaseUrl"}}
	</head>
	<body>
	<div id="main">
	<H1>Soong Modules Reference</H1>
	The latest versions of Android use the Soong build system, which greatly simplifies build
	configuration over the previous Make-based system. This site contains the generated reference
	files for the Soong build system.

	<table class="module_types" summary="Table of Soong module types sorted by package">
	<thead>
	<tr>
	<th style="width:20%">Package</th>
	<th style="width:80%">Module types</th>
	</tr>
	</thead>
	<tbody>
	{{range $pkg := .}}
	<tr>
	<td>{{.Path}}</td>
	<td>
	{{range $i, $mod := .ModuleTypes}}{{if $i}}, {{end}}<a href="{{$pkg.Name}}.html#{{$mod.Name}}">{{$mod.Name}}</a>{{end}}
	</td>
	</tr>
	{{end}}
	</tbody>
	</table>
	</div>
	</body>
	</html>
	`

	perPackageTemplate = `
	<html>
	<head>
	<title>Build Docs</title>
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css">
	<style>
	.accordion,.simple{margin-left:1.5em;text-indent:-1.5em;margin-top:.25em}
	.collapsible{border-width:0 0 0 1;margin-left:.25em;padding-left:.25em;border-style:solid;
	border-color:grey;display:none;}
	span.fixed{display: block; float: left; clear: left; width: 1em;}
	ul {
	list-style-type: none;
	margin: 0;
	padding: 0;
	width: 30ch;
	background-color: #f1f1f1;
	position: fixed;
	height: 100%;
	overflow: auto;
	}
	li a {
	display: block;
	color: #000;
	padding: 8px 16px;
	text-decoration: none;
	}

	li a.active {
	background-color: #4CAF50;
	color: white;
	}

	li a:hover:not(.active) {
	background-color: #555;
	color: white;
	}
	</style>
	{{template "copyBaseUrl"}}
	</head>
	<body>
	{{- /* Fixed sidebar with module types */ -}}
	<ul>
	<li><h3>{{.Name}} package</h3></li>
	{{range $moduleType := .Modules}}<li><a href="{{$.Name}}.html#{{$moduleType.Name}}">{{$moduleType.Name}}</a></li>
	{{end -}}
	</ul>
	{{/* Main panel with H1 section per module type */}}
	<div style="margin-left:30ch;padding:1px 16px;">
	{{range $moduleType := .Modules}}
	{{setModule $moduleType.Name}}
	<p>
	<h2 id="{{$moduleType.Name}}">{{$moduleType.Name}}</h2>
	{{if $moduleType.Synopsis }}{{$moduleType.Synopsis}}{{else}}<i>Missing synopsis</i>{{end}}
	{{- /* Comma-separated list of module attributes' links module attributes */ -}}
	<div class="breadcrumb">
	{{range $i,$prop := $moduleType.Properties }}
	{{ if gt $i 0 }}, {{end -}}
	<a href={{$.Name}}.html#{{getModule}}.{{$prop.Name}}>{{$prop.Name}}</a>
	{{- end -}}
	</div>
	{{- /* Property description */ -}}
	{{- template "properties" $moduleType.Properties -}}
	{{- end -}}

	{{define "properties" -}}
	{{range .}}
	{{if .Properties -}}
	<div class="accordion" id="{{getModule}}.{{.Name}}">
	<span class="fixed">&#x2295</span><b>{{.Name}}</b>
	{{- range .OtherNames -}}, {{.}}{{- end -}}
	</div>
	<div class="collapsible">
	{{- .Text}} {{range .OtherTexts}}{{.}}{{end}}
	{{template "properties" .Properties -}}
	</div>
	{{- else -}}
	<div class="simple" id="{{getModule}}.{{.Name}}">
	<span class="fixed"> </span><b>{{.Name}} {{range .OtherNames}}, {{.}}{{end -}}</b>
	<i>{{.Type}}</i>
	{{- if .Text -}}{{if ne .Text "\n"}}, {{end}}{{.Text}}{{- end -}}
	{{- with .OtherTexts -}}{{.}}{{- end -}}
	{{- if .Default -}}<i>Default: {{.Default}}</i>{{- end -}}
	</div>
	{{- end}}
	{{- end -}}
	{{- end -}}
	</div>
	<script>
	accordions = document.getElementsByClassName('accordion');
	for (i=0; i < accordions.length; ++i) {
	accordions[i].addEventListener("click", function() {
	var panel = this.nextElementSibling;
	var child = this.firstElementChild;
	if (panel.style.display === "block") {
	panel.style.display = "none";
	child.textContent = '\u2295';
	} else {
	panel.style.display = "block";
	child.textContent = '\u2296';
	}
	});
	}
	</script>
	</body>
	`

	copyBaseUrl = `
	{{define "copyBaseUrl"}}
	<script type="text/javascript">
	window.addEventListener('message', (e) => {
	if (e != null && e.data != null && e.data.type === "SET_BASE" && e.data.base != null) {
	const existingBase = document.querySelector('base');
	if (existingBase != null) {
	existingBase.parentElement.removeChild(existingBase);
	}

	const base = document.createElement('base');
	base.setAttribute('href', e.data.base);
	document.head.appendChild(base);
	}
	});
	</script>
	{{end}}
	`
	)