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