package service

import (
	"bytes"
	"errors"
	"net/url"
	"os/exec"
	"strings"
)

var rsyncOpts = []string{
	"--delete-excluded",
	"--hard-links",
	"--links",
	"--perms",
	"--recursive",
	"--safe-links",
	"--sparse",
	"--times",
}

func Rsync(dst *url.URL, src *url.URL) error {
	src2 := *src
	if !strings.HasSuffix(src2.Path, "/.") {
		src2.Path = src2.Path + "/."
	}

	var stderr bytes.Buffer

	args := append(rsyncOpts, src2.String(), dst.String())
	cmd := exec.Command("rsync", args...)
	cmd.Stderr = &stderr

	err := cmd.Run()
	if err != nil {
		return errors.New(stderr.String())
	}

	return nil
}