package main

// see `man 5 githooks` for details

import (
	"errors"
	"fmt"
	"io"
	"log"
	"os"
)

func main() {
	for {
		fmt.Println(getUpdate())
	}
}

type update struct {
	old, updated, ref string
}

func (u update) String() string {
	ret := fmt.Sprintf("'%s' updated from '%s' to '%s'", u.ref, u.old, u.updated)
	return ret
}

func getUpdate() update {
	var u update
	_, err := fmt.Scanf("%s %s %s\n", &u.old, &u.updated, &u.ref)
	if err != nil {
		if errors.Is(err, io.EOF) {
			os.Exit(0)
		} else {
			log.Fatal(err)
		}
	}
	return u
}