Generate random data to CSV file

generate.go

package main

import (
	"os"
	"strconv"

	"github.com/gocarina/gocsv"

	"github.com/bxcodec/faker"
)

type Record struct {
	Latitude           float32 `faker:"lat"`
	Longitude          float32 `faker:"long"`
	CreditCardNumber   string  `faker:"cc_number"`
	CreditCardType     string  `faker:"cc_type"`
	Email              string  `faker:"email"`
	IPV4               string  `faker:"ipv4"`
	IPV6               string  `faker:"ipv6"`
	Password           string  `faker:"password"`
	PhoneNumber        string  `faker:"phone_number"`
	MacAddress         string  `faker:"mac_address"`
	URL                string  `faker:"url"`
	UserName           string  `faker:"username"`
	ToolFreeNumber     string  `faker:"tool_free_number"`
	E164PhoneNumber    string  `faker:"e_164_phone_number"`
	TitleMale          string  `faker:"title_male"`
	TitleFemale        string  `faker:"title_female"`
	FirstName          string  `faker:"first_name"`
	FirstNameMale      string  `faker:"first_name_male"`
	FirstNameFemale    string  `faker:"first_name_female"`
	LastName           string  `faker:"last_name"`
	Name               string  `faker:"name"`
	UnixTime           int64   `faker:"unix_time"`
	Date               string  `faker:"date"`
	Time               string  `faker:"time"`
	MonthName          string  `faker:"month_name"`
	Year               string  `faker:"year"`
	DayOfWeek          string  `faker:"day_of_week"`
	DayOfMonth         string  `faker:"day_of_month"`
	Timestamp          string  `faker:"timestamp"`
	Century            string  `faker:"century"`
	TimeZone           string  `faker:"timezone"`
	TimePeriod         string  `faker:"time_period"`
	Word               string  `faker:"word"`
	Sentence           string  `faker:"sentence"`
	Paragraph          string  `faker:"paragraph"`
	Currency           string  `faker:"currency"`
	Amount             float64 `faker:"amount"`
	AmountWithCurrency string  `faker:"amount_with_currency"`
	UUIDHypenated      string  `faker:"uuid_hyphenated"`
	UUID               string  `faker:"uuid_digit"`
}

func check(e error) {
	if e != nil {
		panic(e)
	}
}

func main() {
	file, err := os.OpenFile(os.Args[1], os.O_RDWR|os.O_CREATE, os.ModePerm)
	check(err)
	defer file.Close()

	num, err := strconv.ParseInt(os.Args[2], 10, 32)
	check(err)

	rows := []*Record{}
	for i := 0; i < int(num); i++ {
		a := Record{}
		err = faker.FakeData(&a)
		check(err)
		rows = append(rows, &a)
	}

	gocsv.MarshalFile(&rows, file)
}

$ go get -u github.com/bxcodec/faker
$ go get -u github.com/gocarina/gocsv
$ go run generate.go <file.csv> <number_of_records>