poem.go

package main

import (
	"flag"
	"log"
	"math/rand"
	"os"
	"time"
)

var logFile string

var poems = []string{
	"FROM far, from eve and morning",
	"And yon twelve-winded sky",
	"The stuff of life to knit me",
	"Blew hither: here am I.",
	"Now—for a breath I tarry",
	"Nor yet disperse apart—",
	"Take my hand quick and tell me",
	"What have you in your heart.",
	"Speak now, and I will answer",
	"How shall I help you, say",
	"Ere to the wind’s twelve quarters",
	"I take my endless way.",
}

func line() string {
	return poems[rand.Intn(len(poems))]
}

func main() {
	flag.Parse()

	logWriter, err := os.OpenFile(
		logFile,
		os.O_RDWR|os.O_CREATE|os.O_APPEND,
		0666,
	)
	if err != nil {
		log.Fatal(err)
	}
	defer logWriter.Close()

	log.SetOutput(logWriter)
	log.SetFlags(log.LstdFlags | log.Lshortfile)

	c := time.Tick(1 * time.Second)
	for range c {
		log.Printf(line())
	}
}

func init() {
	flag.StringVar(&logFile, "log-file", "poem.log", "log file")

	rand.Seed(time.Now().Unix())
}