Go text/template

1 개요

Go text/template

2 예시 1

package main

import (
	"log"
	"os"
	"text/template"
)

type Recipient struct {
	Name, Gift string
	Attended   bool
}

func main() {
	const letter = `
Dear {{.Name}},
{{if .Attended}}
It was a pleasure to see you at the wedding.
{{- else}}
It is a shame you couldn't make it to the wedding.
{{- end}}
{{with .Gift -}}
Thank you for the lovely {{.}}.
{{end}}
Best wishes,
Josie
`
	var recipient = Recipient{"Aunt Mildred", "bone china tea set", true}

	t := template.Must(template.New("letter").Parse(letter))
	err := t.Execute(os.Stdout, recipient)
	if err != nil {
		log.Println("executing template:", err)
	}
}

3 예시 2

package main

import (
	"os"
	"text/template"
)

var card1 = map[int]string{1: "S", 2: "H", 3: "C", 4: "D"}
var card2 = map[string]string{"a": "S", "b": "H", "c": "C", "d": "D"}

func check(err error) {
	if err != nil {
		panic(err)
	}
}
func main() {
	t := template.Must(template.New("t1").Parse("Dot:{{.}}\n"))
	check(t.Execute(os.Stdout, card1))

	t = template.Must(template.New("t2").Parse("Hi,{{.a}}\n"))
	check(t.Execute(os.Stdout, card2))

	t = template.Must(template.New("t2").Parse("{{index . 3}}\n"))
	check(t.Execute(os.Stdout, card1))

	t = template.Must(template.New("t2").Parse(`Repeat
{{define "T1"}}Apple{{end}}  {{define "T2"}}Ape{{end}}
  {{template "T2"}} ate {{template "T1"}}
`))
	check(t.Execute(os.Stdout, card1))
}

4 예시 3

package main

import (
	"bytes"
	"fmt"
	"strings"
	"text/template"
)

func renderTemplate(tmplString string, labels map[string]string) string {
	var buf bytes.Buffer
	t, _ := template.New("t1").Parse(strings.ReplaceAll(tmplString, "$labels", ""))
	_ = t.Execute(&buf, labels)
	return buf.String()
}
func main() {
	tmplString := "{{$labels.instance}} of job {{$labels.job}} has been down for more than 5 minutes."
	labels := map[string]string{"instance": "😋", "job": "👌"}
	result := renderTemplate(tmplString, labels)
	fmt.Println(result)
}

5 참고

• https://pkg.go.dev/text/template