Go code for recursively getting files

sad.go

package main

import (
	"fmt"
	"io/ioutil"
	"strconv"
	"sync"
	"time"
)

var wg sync.WaitGroup

type set struct {
	path  string
	isDir bool
	size  int64
}

var (
	fileCount  int
	dirCount   int
	totalSpace int64
)

func main() {
	startingDir := set{"D:/", true, 0}
	c := make(chan set)
	wg.Add(2)
	fmt.Println("D | ", startingDir.path)
	start := time.Now()

	go func() {
		listFiles(startingDir, true, c)
		listFiles(set{"C:/", true, 0}, true, c)
		wg.Wait()
		close(c)
	}()
	for s := range c {
		// fmt.Println(s.path)
		if s.isDir {
			dirCount += 1
		} else {
			fileCount += 1
			totalSpace += s.size
		}
	}

	wg.Wait()
	elapsed := time.Since(start)
	fmt.Println("Time: ", elapsed)
	fmt.Println("Files: ", fileCount)
	fmt.Println("Folders: ", dirCount)
	fmt.Println("Total size: ", totalSpace/1024/1024, "MB")
	// fmt.Println("Writing to file...")
	// err := ioutil.WriteString("Out.txt", stuff, 0744)
	// fmt.Println("Done.")
}

func listFiles(s set, recurse bool, c chan set) {
	defer wg.Done()
	files, _ := ioutil.ReadDir(s.path)
	for _, f := range files {
		newPath := s.path + "/" + f.Name()
		if f.IsDir() {
			wg.Add(1)
			if recurse {
				go listFiles(set{s.path + "/" + f.Name(), true, 0}, recurse, c)
			}
			// fmt.Print(len(dir), " | ")
			// fmt.Println("Sending DIR!")
			c <- set{("D | " + strconv.FormatInt(f.Size(), 10) + " | " + newPath), true, 0}

		} else {
			// fmt.Print((len(dir) + len(f.Name())), " | ")
			c <- set{("F | " + strconv.FormatInt(f.Size(), 10) + " | " + newPath), false, f.Size()}
		}
	}
}