suka

package main

import (
    "fmt"
    "io/ioutil"
    "os"
)

var b, q, f string = `./`, `├───`, `└───`
var n, p int = 1, 0

func printTree(p, a, idx, l int, s string) int {
    if idx == 1 {
        if a == l-1 {
            fmt.Println(f + s)
            return 0
        }
        fmt.Println(q + s)
        return 0
    }
    w := ""
    for x := 0; x < idx-p-1; x++ {
        w += "│ "
    }
    for x := 0; x < p; x++ {
        w += "  "
    }
    if a == l-1 {
        fmt.Println(w + f + s)
        return 0
    } else {
        fmt.Println(w + q + s)
        return 0
    }
}

func tree(g []os.FileInfo, p int) {
    for idx, file := range g {
        printTree(p, idx, n, len(g), file.Name())
        if file.IsDir() {
            if idx == len(g)-1 {
                p++
            }
            n++
            b1 := b
            b += file.Name() + `/`
            files, err := ioutil.ReadDir(b)
            if err != nil {
                fmt.Print(err)
            }
            tree(files, p)
            b = b1
            n--
            if p > 0 {
                p--
            }
        }
    }
}

func main() {
    files, err := ioutil.ReadDir(".")
    if err != nil {
        fmt.Print(err)
    }
    tree(files, p)
}