なんか雑に書いた、与えられた年月の一月分を回すぜ.go

main.go

package main

import (
	"flag"
	"os"
	"time"

	"github.com/k0kubun/pp"
)

func main() {
	var month string
	flag.StringVar(&month, "m", "", "base month")

	flag.Parse()

	var base time.Time
	var err error
	lo := "200601"
	if len(month) > 0 {
		base, err = time.Parse(lo, month)
		if err != nil {
			os.Exit(1)
		}
	} else {
		base = time.Now()
	}
	by, bm, _ := base.Date()
	fd := time.Date(by, bm, 1, 0, 0, 0, 0, time.UTC)
	ld := fd.AddDate(0, 1, -1)
	spec := fd
	for index := 0; index < ld.Day(); index++ {
		pp.Println(spec, spec.Unix(), spec.UnixNano())
		next := spec.AddDate(0, 0, 1)

		spec = next
	}
}