package tools

import (
	"bufio"
	"log"
	"os"
	"strings"
)

func HostsToJson() (data map[string][]string, err error) {
	f, err := os.Open(`/etc/ansible/hosts`)
	if err != nil {
		return nil, err
	}
	defer func() {
		if err = f.Close(); err != nil {
			log.Fatal(err)
		}
	}()
	data = make(map[string][]string)
	// 以这个文件为参数，创建一个 scanner
	s := bufio.NewScanner(f)
	var key string
	var per []string
	// 扫描每行文件，按行读取
	for s.Scan() {
		if strings.HasPrefix(s.Text(), "[") && strings.HasSuffix(s.Text(), "]") {
			key = s.Text()
			per = []string{}
			data[key] = per
		} else {
			data[key] = append(data[key], s.Text())
		}
	}
	err = s.Err()
	if err != nil {
		return nil, err
	}
	return data, nil
}