generate import list from Godeps.json

gen-import-list.go

package main

// This program will read the Godeps.json and generate import list

import (
	"encoding/json"
	"flag"
	"fmt"
	"io/ioutil"
	"os"
	"sort"
)

var path = flag.String("f", "Godeps.json", "Godeps.json file")

type item struct {
	ImportPath string `json:"ImportPath"`
	Comment    string `json:"Comment"`
	Rev        string `json:"Rev"`
}

type info struct {
	ImportPath string   `json:"ImportPath"`
	GoVersion  string   `json:"GoVersion"`
	Packages   []string `json:"GoVersion"`
	Deps       []item   `json:"Deps"`
}

func main() {
	flag.Parse()

	f, err := os.Open(*path)
	if err != nil {
		fmt.Println(err.Error())
		return
	}
	defer f.Close()

	data, err := ioutil.ReadAll(f)
	if err != nil {
		fmt.Printf("read %s err %v", *path, err)
		return
	}

	var v info
	if err = json.Unmarshal(data, &v); err != nil {
		fmt.Printf("Unmarshal %s json data err %v", *path, err)
		return
	}

	l := make([]string, 0, len(v.Deps))
	for _, i := range v.Deps {
		l = append(l, i.ImportPath)
	}

	sort.Strings(l)

	for _, i := range l {
        println(i)
	}

	return
}