t.go

package main

import (
	"flag"
	"fmt"
	"os"
	"text/template"
)

func main() {
	flag.Parse()
	fmt.Println(flag.Arg(0))
	t, err := template.New("").Parse(flag.Arg(0))
	if err != nil {
		fmt.Fprintf(os.Stderr, "build template failed: %s\n", err)
		os.Exit(1)
	}
	if err := t.Execute(os.Stdout, "test"); err != nil {
		fmt.Fprintf(os.Stderr, "execution failed: %s\n", err)
		os.Exit(1)
	}
	// -> % go run /tmp/t.go 'input: {{printf "%q" .}}'
	// input: {{printf "%q" .}}
	// input: "test"% 
}