aws_ec2_to_json.go

package main

import (
        "encoding/csv"
        "encoding/json"
        "io/ioutil"
        "os"
)

type Instance struct {
        InstanceId string `json:"InstanceId"`
        Name       string `json:"Name"`
}

func main() {
        data, err := ioutil.ReadFile("./instances.json")
        if err != nil {
                panic(err)
        }

        var instances []Instance
        err = json.Unmarshal([]byte(data), &instances)
        if err != nil {
                panic(err)
        }

        f, err := os.Create("./instances.csv")
        if err != nil {
                panic(err)
        }
        defer f.Close()

        w := csv.NewWriter(f)
        for _, v := range instances {
                var entry []string
                entry = append(entry, v.Name, v.InstanceId)
                w.Write(entry)
        }
        w.Flush()
}