In a Go template, how to add a line with a string value only if that value is non-empty?

I’d like to render a template with a struct containing a certain string field, say a Restaurant with a Name, such that if the Name is non-empty, it is printed on a line, but if it is empty, that line is absent. So far, I’ve tried

package main

import (
    "os"
    "text/template"
)

type Restaurant struct {
    Name string
}

func main() {
    tmpl, err := template.New("test").Parse(`The restaurant is:
{{if .Name }}{{.Name}}{{ end }}
The end.
`)
    if err != nil {
        panic(err)
    }

    if err := tmpl.Execute(os.Stdout, Restaurant{Name: ""}); err != nil {
        panic(err)
    }
}

This prints

The restaurant is:

The end.

However, I want the blank line in the middle to be omitted in that case:

The restaurant is:
The end.

When the name is non-empty, however, I want the line to be present: if I used Restaurant{Name: "Itria"} in the tmpl.Execute argument, the output should be

The restaurant is:
Itria
The end.

I’ve read https://pkg.go.dev/text/template#hdr-Text_and_spaces but it is unclear to me how to use the minus sign before and after action delimiters to achieve this.

>Solution :

You want the newline rendered conditionally, if .Name is not empty. So move a newline inside the {{if}} block, and do not render (leave) a newline after the {{if}} block (try it on the Go Playground):

    tmpl, err := template.New("test").Parse(`The restaurant is:
{{if .Name }}{{.Name}}
{{end}}The end.
`)

Or another solution (try this one on the Go Playground):

    tmpl, err := template.New("test").Parse(`The restaurant is:
{{if .Name }}{{.Name}}
{{ end -}}
The end.
`)