Func to print the line no, code and current local variable with value

command.go

func printCode(t *Term, filename string, line int, showArrow bool,th *api.Thread,ctx callContext,args string) error {
	
	file, err := os.Open(t.substitutePath(filename))
	if err != nil {
		return err
	}
	defer file.Close()

	fi, _ := file.Stat()
	lastModExe := t.client.LastModified()
	if fi.ModTime().After(lastModExe) {
		fmt.Println("Warning: listing may not match stale executable")
	}

	buf := bufio.NewScanner(file)
	l := line
	for i := 1; i < l-5; i++ {
		if !buf.Scan() {
			return nil
		}
	}

	s := l - 5
	if s < 1 {
		s = 1
	}


	for i := s; i <= l+5; i++ {
		if !buf.Scan() {
			return nil
		}

		var prefix string
		if showArrow {
			prefix = "  "
			if i == l {
				prefix = "=>"
			}
		}

		prefix = fmt.Sprintf("%s%4d:\t", prefix, i)
		//t.Println(prefix, buf.Text())

		//print the code
	    fmt.Printf("> (%s) %s:%d\n",
			buf.Text(),
			th.File,
			th.Line)

	    locals(t,ctx,args)
	    fmt.Println()

	}
	

	return nil
}