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package main
import (
"github.com/golang/protobuf/proto"
"github.com/ry/v8worker2"
"io/ioutil"
"os"
"path"
"path/filepath"
"runtime"
"strings"
)
func HandleCompileOutput(source string, filename string) []byte {
// println("compile output from golang", filename)
// Remove any ".." elements. This prevents hacking by trying to move up.
filename, err := filepath.Rel("/", filename)
check(err)
if strings.Contains(filename, "..") {
panic("Assertion error.")
}
filename = path.Join(CompileDir, filename)
err = os.MkdirAll(path.Dir(filename), 0700)
check(err)
err = ioutil.WriteFile(filename, []byte(source), 0600)
check(err)
return nil
}
func ReadFileSync(filename string) []byte {
buf, err := ioutil.ReadFile(filename)
msg := &Msg{Kind: Msg_DATA_RESPONSE}
if err != nil {
msg.Error = err.Error()
} else {
msg.Data = buf
}
out, err := proto.Marshal(msg)
check(err)
return out
}
func UserHomeDir() string {
if runtime.GOOS == "windows" {
home := os.Getenv("HOMEDRIVE") + os.Getenv("HOMEPATH")
if home == "" {
home = os.Getenv("USERPROFILE")
}
return home
}
return os.Getenv("HOME")
}
func loadAsset(w *v8worker2.Worker, path string) {
data, err := Asset(path)
check(err)
err = w.Load(path, string(data))
check(err)
}
var DenoDir string
var CompileDir string
var SrcDir string
func createDirs() {
DenoDir = path.Join(UserHomeDir(), ".deno")
CompileDir = path.Join(DenoDir, "compile")
err := os.MkdirAll(CompileDir, 0700)
check(err)
SrcDir = path.Join(DenoDir, "src")
err = os.MkdirAll(SrcDir, 0700)
check(err)
}
func check(e error) {
if e != nil {
panic(e)
}
}
func recv(buf []byte) []byte {
msg := &Msg{}
err := proto.Unmarshal(buf, msg)
check(err)
switch msg.Kind {
case Msg_READ_FILE_SYNC:
return ReadFileSync(msg.Path)
case Msg_EXIT:
os.Exit(int(msg.Code))
case Msg_COMPILE_OUTPUT:
payload := msg.GetCompileOutput()
return HandleCompileOutput(payload.Source, payload.Filename)
default:
panic("Unexpected message")
}
return nil
}
func main() {
args := v8worker2.SetFlags(os.Args)
createDirs()
worker := v8worker2.New(recv)
loadAsset(worker, "dist/main.js")
cwd, err := os.Getwd()
check(err)
out, err := proto.Marshal(&Msg{
Kind: Msg_START,
Payload: &Msg_Start{
Start: &StartMsg{
Cwd: cwd,
Argv: args,
},
},
})
check(err)
err = worker.SendBytes(out)
if err != nil {
os.Stderr.WriteString(err.Error())
os.Exit(1)
}
}
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