convert atom snippets to vscode snippets

convert.go

package main

import (
	"bytes"
	"encoding/json"
	"flag"
	"io/ioutil"
	"os"
	"regexp"
	"strings"
)

type Snippet struct {
	Prefix string      `json:"prefix"`
	Body   interface{} `json:"body"`
}

var nl = regexp.MustCompile("[^\n]*")

func splitNewlines(body string) []string {
	return nl.FindAllString(body, -1)
}

func main() {
	flag.Parse()
	file := flag.Arg(0)

	d, err := ioutil.ReadFile(file)
	if err != nil {
		panic(err)
	}

	atom := make(map[string]map[string]Snippet)
	vscode := make(map[string]map[string]Snippet)

	err = json.Unmarshal(d, &atom)
	if err != nil {
		panic(err)
	}

	for atomscope, atomsnippets := range atom {
		vscodescopename := atomscope[strings.LastIndexByte(atomscope, '.')+1:]
		vscodescope := make(map[string]Snippet)

		for title, snippet := range atomsnippets {
			lines := splitNewlines(snippet.Body.(string))

			sn := Snippet{}
			sn.Prefix = snippet.Prefix

			if len(lines) == 1 {
				sn.Body = lines[0]
			} else {
				sn.Body = lines
			}

			vscodescope[title] = sn
		}

		vscode[vscodescopename] = vscodescope
	}

	for scope, data := range vscode {
		if scope == "*" {
			continue
		}

		for k, v := range vscode["*"] {
			data[k] = v
		}

		w, err := os.Create(scope + ".json")
		if err != nil {
			panic(err)
		}
		defer w.Close()

		vscodedata, err := json.MarshalIndent(data, "", "\t")
		if err != nil {
			panic(err)
		}

		vscodedata = bytes.Replace(vscodedata, []byte("\\u003c"), []byte("<"), -1)
		vscodedata = bytes.Replace(vscodedata, []byte("\\u003e"), []byte(">"), -1)
		vscodedata = bytes.Replace(vscodedata, []byte("\\u0026"), []byte("&"), -1)
		vscodedata = bytes.Replace(vscodedata, []byte("\\t"), []byte("\t"), -1)

		w.Write(vscodedata)
	}
}