Remove all files/directories from a directory 'dir'

removeFiles.go

func RemoveFiles(dir string) error {
    d, err := os.Open(dir)
    if err != nil {
        return err
    }
    defer d.Close()
    
    names, err := d.Readdirnames(-1)
    if err != nil {
        return err
    }
  
    for _, name := range names {
        err = os.RemoveAll(filepath.Join(dir, name))
        if err != nil {
            return err
        }
    }
    return nil
}