town/cmd/emailtouser/main.go

package main

import (
	"errors"
	"fmt"
	"os"

	"git.tilde.town/tildetown/town/towndb"
)

func _main(args []string) error {
	if len(args) < 2 {
		return errors.New("need email")
	}
	email := args[1]

	db, err := towndb.ConnectDB()
	if err != nil {
		return err
	}

	user, err := towndb.UserForEmail(db, email)
	if err != nil {
		return err
	}
	if user == nil {
		return errors.New("email does not correspond to user")
	}

	fmt.Print(user.Username)

	return nil
}

func main() {
	if err := _main(os.Args); err != nil {
		fmt.Fprintf(os.Stderr, "%s\n", err.Error())
		os.Exit(1)
	}
}