react/cmd/reactGen/init.go

package main

import (
	"bytes"
	"fmt"
	"io/ioutil"
	"os"
	"os/exec"
	"path/filepath"
	"strings"
	"text/template"
)

const (
	templateHeader = "Template generated by " + reactGenCmd

	templateMinimal   = "minimal"
	templateBootstrap = "bootstrap"
)

// TODO this needs a significant overhaul to support multiple templates
// extensibility etc but works for now
func doinit(wd string, tmplName string) {
	tmpl := struct {
		DirName   string
		Bootstrap bool
	}{
		DirName: filepath.Base(wd),
	}

	switch tmplName {
	case templateMinimal:
	case templateBootstrap:
		tmpl.Bootstrap = true
	default:
		panic(fmt.Errorf("unknown template %q", tmplName))
	}

	for fn, c := range minimal {
		b := bytes.NewBuffer(nil)

		t := template.New(fn)
		_, err := t.Parse(c)
		if err != nil {
			panic(fmt.Errorf("failed to parse template %v: %v", fn, err))
		}

		err = t.Execute(b, tmpl)
		if err != nil {
			panic(fmt.Errorf("failed to execute template %v: %v", fn, err))
		}

		toWrite := b.Bytes()

		fp := filepath.Join(wd, fn)

		if strings.HasSuffix(fn, ".go") {

			out, err := goFmtBuf(b)
			if err == nil {
				toWrite = out.Bytes()
			}
		}

		err = ioutil.WriteFile(fp, toWrite, 0644)
		if err != nil {
			panic(fmt.Errorf("failed to write file %v: %v", fp, err))
		}
	}

	gg := exec.Command("go", "generate")
	gg.Dir = wd
	gg.Stderr = os.Stderr
	gg.Stdout = os.Stdout

	err := gg.Run()
	if err != nil {
		fatalf("failed to run go generate: %v", err)
	}
}

var minimal = map[string]string{
	// app.go
	"app.go": `// ` + templateHeader + `

package main

import (
	"myitcv.io/react"
)

type AppDef struct {
	react.ComponentDef
}

func App() *AppElem {
	return buildAppElem()
}

func (a AppDef) Render() react.Element {
	return react.Div(nil,
		react.H1(nil,
			react.S("Hello World"),
		),
		react.P(nil,
			react.S("This is my first GopherJS React App."),
		),
	)
}
`,

	// main.go
	"main.go": `// ` + templateHeader + `

package main

import (
	"myitcv.io/react"

	"honnef.co/go/js/dom"
)

  //go:generate gobin -m -run myitcv.io/react/cmd/reactGen

var document = dom.GetWindow().Document()

func main() {
	domTarget := document.GetElementByID("app")

	react.Render(App(), domTarget)
}
`,

	// index.html
	"index.html": `<!--` + templateHeader + `-->

<!doctype html>
<html lang="en">
  <head>
	 <meta charset="utf-8">
	 <meta http-equiv="X-UA-Compatible" content="IE=edge">
	 <meta name="viewport" content="width=device-width, initial-scale=1">

	 {{if .Bootstrap}}
    <title>Hello World Bootstrap</title>

	 <!-- START BOOTSTRAP -->

	 <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
	 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
	 <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>


	 <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
	 <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
	 <!--[if lt IE 9]>
		 <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
		 <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
	 <![endif]-->

	 <!-- END BOOTSTRAP -->
	 {{else}}
    <title>Hello World</title>
	 {{end}}

  </head>
  <body>
	 {{if .Bootstrap}}
	 <div class="container-fluid">
	 {{end}}
    <div id="app"></div>
	 {{if .Bootstrap}}
	 </div>
	 {{end}}
    <script src="{{.DirName}}.js"></script>
  </body>
</html>
`,
}