package ethrepl import ( "bufio" "fmt" "io" "os" "path" "github.com/ethereum/eth-go" "github.com/ethereum/eth-go/ethlog" "github.com/ethereum/eth-go/ethutil" "github.com/ethereum/go-ethereum/javascript" ) var logger = ethlog.NewLogger("REPL") type Repl interface { Start() Stop() } type JSRepl struct { re *javascript.JSRE prompt string history *os.File running bool } func NewJSRepl(ethereum *eth.Ethereum) *JSRepl { hist, err := os.OpenFile(path.Join(ethutil.Config.ExecPath, "history"), os.O_RDWR|os.O_CREATE, os.ModePerm) if err != nil { panic(err) } return &JSRepl{re: javascript.NewJSRE(ethereum), prompt: "> ", history: hist} } func (self *JSRepl) Start() { if !self.running { self.running = true logger.Infoln("init JS Console") reader := bufio.NewReader(self.history) for { line, err := reader.ReadString('\n') if err != nil && err == io.EOF { break } else if err != nil { fmt.Println("error reading history", err) break } addHistory(line[:len(line)-1]) } self.read() } } func (self *JSRepl) Stop() { if self.running { self.running = false self.re.Stop() logger.Infoln("exit JS Console") self.history.Close() } } func (self *JSRepl) parseInput(code string) { defer func() { if r := recover(); r != nil { fmt.Println("[native] error", r) } }() value, err := self.re.Run(code) if err != nil { fmt.Println(err) return } self.PrintValue(value) }