Regex Folder Rename

regex_rename.go

package main

import (
	"fmt"
	"os"
	"path/filepath"
	"regexp"
	"strings"
)
func main() {
	root := "Y:\\Serials\\Serials Complete\\Sherlock"
	seriesName := "Sherlock"
	var files []string
	err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
		files = append(files, path)
		return nil
	})
	if err != nil {
		panic(err)
	}
	r  := regexp.MustCompile(`[Ss](?P<Season>\d{2}).*[Ee](?P<Episode>\d{2})`)
	//names := r.SubexpNames()
	for _, file := range files {
		res := r.FindAllStringSubmatch(file,-1)
		if len(res) > 0 {
			s := res[0][1]
			e := res[0][2]

			newFileName := fmt.Sprintf("%s Seasson %s Episode %s.%s",seriesName,s,e,file[strings.LastIndex(file,".") +1:])
			_ = os.Rename(file, root+"\\"+newFileName)
			fmt.Println(newFileName)
		}
	}
}