cmd/ethereum: new JS repl with cross-platform line editing
This commit is contained in:
Felix Lange
parent
bae7e93a9c
commit
38f6d60e6e
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@ -18,13 +18,21 @@
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package main
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import (
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"fmt"
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"io/ioutil"
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"os"
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"path"
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"strings"
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"github.com/ethereum/go-ethereum/cmd/utils"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/eth"
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"github.com/ethereum/go-ethereum/ethutil"
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"github.com/ethereum/go-ethereum/javascript"
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"github.com/ethereum/go-ethereum/state"
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"github.com/ethereum/go-ethereum/xeth"
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"github.com/obscuren/otto"
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"github.com/peterh/liner"
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)
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func execJsFile(ethereum *eth.Ethereum, filename string) {
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@ -41,3 +49,202 @@ func execJsFile(ethereum *eth.Ethereum, filename string) {
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utils.Fatalf("Javascript Error: %v", err)
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}
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}
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type repl struct {
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re *javascript.JSRE
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ethereum *eth.Ethereum
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xeth *xeth.XEth
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prompt string
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histfile *os.File
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lr *liner.State
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running bool
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}
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func newREPL(ethereum *eth.Ethereum) *repl {
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hist, err := os.OpenFile(path.Join(ethereum.DataDir, "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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xeth := xeth.New(ethereum)
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repl := &repl{
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re: javascript.NewJSRE(xeth),
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xeth: xeth,
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ethereum: ethereum,
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prompt: "> ",
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histfile: hist,
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lr: liner.NewLiner(),
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}
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repl.initStdFuncs()
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return repl
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}
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func (self *repl) Start() {
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if !self.running {
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self.running = true
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self.lr.ReadHistory(self.histfile)
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go self.read()
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}
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}
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func (self *repl) Stop() {
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if self.running {
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self.running = false
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self.histfile.Truncate(0)
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self.lr.WriteHistory(self.histfile)
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self.histfile.Close()
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}
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}
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func (self *repl) 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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var indentCount = 0
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var str = ""
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func (self *repl) setIndent() {
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open := strings.Count(str, "{")
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open += strings.Count(str, "(")
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closed := strings.Count(str, "}")
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closed += strings.Count(str, ")")
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indentCount = open - closed
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if indentCount <= 0 {
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self.prompt = "> "
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} else {
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self.prompt = strings.Join(make([]string, indentCount*2), "..")
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self.prompt += " "
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}
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}
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func (self *repl) read() {
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for {
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input, err := self.lr.Prompt(self.prompt)
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if err != nil {
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return
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}
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if input == "" {
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continue
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}
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str += input + "\n"
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self.setIndent()
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if indentCount <= 0 {
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if input == "exit" {
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self.Stop()
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return
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}
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hist := str[:len(str)-1]
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self.lr.AppendHistory(hist)
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self.parseInput(str)
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str = ""
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}
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}
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}
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func (self *repl) printValue(v interface{}) {
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method, _ := self.re.Vm.Get("prettyPrint")
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v, err := self.re.Vm.ToValue(v)
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if err == nil {
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val, err := method.Call(method, v)
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if err == nil {
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fmt.Printf("%v", val)
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}
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}
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}
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func (self *repl) initStdFuncs() {
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t, _ := self.re.Vm.Get("eth")
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eth := t.Object()
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eth.Set("connect", self.connect)
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eth.Set("stopMining", self.stopMining)
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eth.Set("startMining", self.startMining)
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eth.Set("dump", self.dump)
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eth.Set("export", self.export)
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}
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/*
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* The following methods are natively implemented javascript functions.
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*/
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func (self *repl) dump(call otto.FunctionCall) otto.Value {
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var block *types.Block
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if len(call.ArgumentList) > 0 {
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if call.Argument(0).IsNumber() {
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num, _ := call.Argument(0).ToInteger()
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block = self.ethereum.ChainManager().GetBlockByNumber(uint64(num))
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} else if call.Argument(0).IsString() {
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hash, _ := call.Argument(0).ToString()
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block = self.ethereum.ChainManager().GetBlock(ethutil.Hex2Bytes(hash))
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} else {
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fmt.Println("invalid argument for dump. Either hex string or number")
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}
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if block == nil {
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fmt.Println("block not found")
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return otto.UndefinedValue()
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}
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} else {
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block = self.ethereum.ChainManager().CurrentBlock()
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}
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statedb := state.New(block.Root(), self.ethereum.Db())
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v, _ := self.re.Vm.ToValue(statedb.RawDump())
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return v
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}
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func (self *repl) stopMining(call otto.FunctionCall) otto.Value {
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self.xeth.Miner().Stop()
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return otto.TrueValue()
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}
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func (self *repl) startMining(call otto.FunctionCall) otto.Value {
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self.xeth.Miner().Start()
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return otto.TrueValue()
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}
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func (self *repl) connect(call otto.FunctionCall) otto.Value {
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nodeURL, err := call.Argument(0).ToString()
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if err != nil {
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return otto.FalseValue()
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}
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if err := self.ethereum.SuggestPeer(nodeURL); err != nil {
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return otto.FalseValue()
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}
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return otto.TrueValue()
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}
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func (self *repl) export(call otto.FunctionCall) otto.Value {
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if len(call.ArgumentList) == 0 {
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fmt.Println("err: require file name")
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return otto.FalseValue()
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}
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fn, err := call.Argument(0).ToString()
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if err != nil {
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fmt.Println(err)
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return otto.FalseValue()
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}
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data := self.ethereum.ChainManager().Export()
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if err := ethutil.WriteFile(fn, data); err != nil {
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fmt.Println(err)
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return otto.FalseValue()
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}
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return otto.TrueValue()
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}
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@ -28,7 +28,6 @@ import (
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"time"
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"github.com/codegangsta/cli"
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"github.com/ethereum/go-ethereum/cmd/ethereum/repl"
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"github.com/ethereum/go-ethereum/cmd/utils"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/eth"
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@ -145,9 +144,9 @@ func runjs(ctx *cli.Context) {
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eth := utils.GetEthereum(ClientIdentifier, Version, ctx)
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startEth(ctx, eth)
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if len(ctx.Args()) == 0 {
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repl := ethrepl.NewJSRepl(eth)
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repl.Start()
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repl := newREPL(eth)
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utils.RegisterInterrupt(func(os.Signal) { repl.Stop() })
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repl.Start()
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eth.WaitForShutdown()
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} else if len(ctx.Args()) == 1 {
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execJsFile(eth, ctx.Args()[0])
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@ -1,97 +0,0 @@
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// Copyright (c) 2013-2014, Jeffrey Wilcke. All rights reserved.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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// MA 02110-1301 USA
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/* Inspired by https://github.com/xuyu/logging/blob/master/colorful_win.go */
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package ethrepl
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import (
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"syscall"
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"unsafe"
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)
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type color uint16
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const (
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green = color(0x0002)
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red = color(0x0004)
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yellow = color(0x000E)
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)
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const (
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mask = uint16(yellow | green | red)
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)
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var (
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kernel32 = syscall.NewLazyDLL("kernel32.dll")
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procGetStdHandle = kernel32.NewProc("GetStdHandle")
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procSetConsoleTextAttribute = kernel32.NewProc("SetConsoleTextAttribute")
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procGetConsoleScreenBufferInfo = kernel32.NewProc("GetConsoleScreenBufferInfo")
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hStdout uintptr
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initScreenInfo *consoleScreenBufferInfo
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)
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func setConsoleTextAttribute(hConsoleOutput uintptr, wAttributes uint16) bool {
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ret, _, _ := procSetConsoleTextAttribute.Call(hConsoleOutput, uintptr(wAttributes))
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return ret != 0
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}
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type coord struct {
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X, Y int16
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}
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type smallRect struct {
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Left, Top, Right, Bottom int16
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}
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type consoleScreenBufferInfo struct {
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DwSize coord
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DwCursorPosition coord
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WAttributes uint16
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SrWindow smallRect
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DwMaximumWindowSize coord
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}
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func getConsoleScreenBufferInfo(hConsoleOutput uintptr) *consoleScreenBufferInfo {
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var csbi consoleScreenBufferInfo
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ret, _, _ := procGetConsoleScreenBufferInfo.Call(hConsoleOutput, uintptr(unsafe.Pointer(&csbi)))
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if ret == 0 {
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return nil
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}
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return &csbi
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}
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const (
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stdOutputHandle = uint32(-11 & 0xFFFFFFFF)
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)
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func init() {
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hStdout, _, _ = procGetStdHandle.Call(uintptr(stdOutputHandle))
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initScreenInfo = getConsoleScreenBufferInfo(hStdout)
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}
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func resetColorful() {
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if initScreenInfo == nil {
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return
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}
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setConsoleTextAttribute(hStdout, initScreenInfo.WAttributes)
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}
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func changeColor(c color) {
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attr := uint16(0) & ^mask | uint16(c)
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setConsoleTextAttribute(hStdout, attr)
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}
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@ -1,201 +0,0 @@
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// Copyright (c) 2013-2014, Jeffrey Wilcke. All rights reserved.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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// MA 02110-1301 USA
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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/core/types"
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"github.com/ethereum/go-ethereum/eth"
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"github.com/ethereum/go-ethereum/ethutil"
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"github.com/ethereum/go-ethereum/javascript"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/state"
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"github.com/ethereum/go-ethereum/xeth"
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"github.com/obscuren/otto"
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)
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var repllogger = logger.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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ethereum *eth.Ethereum
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xeth *xeth.XEth
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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(ethereum.DataDir, "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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xeth := xeth.New(ethereum)
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repl := &JSRepl{re: javascript.NewJSRE(xeth), xeth: xeth, ethereum: ethereum, prompt: "> ", history: hist}
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repl.initStdFuncs()
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return repl
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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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repllogger.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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repllogger.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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func (self *JSRepl) initStdFuncs() {
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t, _ := self.re.Vm.Get("eth")
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eth := t.Object()
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eth.Set("connect", self.connect)
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eth.Set("stopMining", self.stopMining)
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eth.Set("startMining", self.startMining)
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eth.Set("dump", self.dump)
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eth.Set("export", self.export)
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}
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/*
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* The following methods are natively implemented javascript functions
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*/
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func (self *JSRepl) dump(call otto.FunctionCall) otto.Value {
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var block *types.Block
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if len(call.ArgumentList) > 0 {
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if call.Argument(0).IsNumber() {
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num, _ := call.Argument(0).ToInteger()
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block = self.ethereum.ChainManager().GetBlockByNumber(uint64(num))
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} else if call.Argument(0).IsString() {
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hash, _ := call.Argument(0).ToString()
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block = self.ethereum.ChainManager().GetBlock(ethutil.Hex2Bytes(hash))
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} else {
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fmt.Println("invalid argument for dump. Either hex string or number")
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}
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if block == nil {
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fmt.Println("block not found")
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return otto.UndefinedValue()
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}
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} else {
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block = self.ethereum.ChainManager().CurrentBlock()
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}
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statedb := state.New(block.Root(), self.ethereum.Db())
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v, _ := self.re.Vm.ToValue(statedb.RawDump())
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return v
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}
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func (self *JSRepl) stopMining(call otto.FunctionCall) otto.Value {
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self.xeth.Miner().Stop()
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return otto.TrueValue()
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}
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func (self *JSRepl) startMining(call otto.FunctionCall) otto.Value {
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self.xeth.Miner().Start()
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return otto.TrueValue()
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}
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|
||||
func (self *JSRepl) connect(call otto.FunctionCall) otto.Value {
|
||||
nodeURL, err := call.Argument(0).ToString()
|
||||
if err != nil {
|
||||
return otto.FalseValue()
|
||||
}
|
||||
if err := self.ethereum.SuggestPeer(nodeURL); err != nil {
|
||||
return otto.FalseValue()
|
||||
}
|
||||
return otto.TrueValue()
|
||||
}
|
||||
|
||||
func (self *JSRepl) export(call otto.FunctionCall) otto.Value {
|
||||
if len(call.ArgumentList) == 0 {
|
||||
fmt.Println("err: require file name")
|
||||
return otto.FalseValue()
|
||||
}
|
||||
|
||||
fn, err := call.Argument(0).ToString()
|
||||
if err != nil {
|
||||
fmt.Println(err)
|
||||
return otto.FalseValue()
|
||||
}
|
||||
|
||||
data := self.ethereum.ChainManager().Export()
|
||||
|
||||
if err := ethutil.WriteFile(fn, data); err != nil {
|
||||
fmt.Println(err)
|
||||
return otto.FalseValue()
|
||||
}
|
||||
|
||||
return otto.TrueValue()
|
||||
}
|
||||
|
|
@ -1,144 +0,0 @@
|
|||
// Copyright (c) 2013-2014, Jeffrey Wilcke. All rights reserved.
|
||||
//
|
||||
// This library is free software; you can redistribute it and/or
|
||||
// modify it under the terms of the GNU General Public
|
||||
// License as published by the Free Software Foundation; either
|
||||
// version 2.1 of the License, or (at your option) any later version.
|
||||
//
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
// General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License
|
||||
// along with this library; if not, write to the Free Software
|
||||
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
||||
// MA 02110-1301 USA
|
||||
|
||||
package ethrepl
|
||||
|
||||
// #cgo darwin CFLAGS: -I/usr/local/opt/readline/include
|
||||
// #cgo darwin LDFLAGS: -L/usr/local/opt/readline/lib
|
||||
// #cgo LDFLAGS: -lreadline
|
||||
// #include <stdio.h>
|
||||
// #include <stdlib.h>
|
||||
// #include <readline/readline.h>
|
||||
// #include <readline/history.h>
|
||||
import "C"
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
"os/signal"
|
||||
"strings"
|
||||
"syscall"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
func initReadLine() {
|
||||
C.rl_catch_sigwinch = 0
|
||||
C.rl_catch_signals = 0
|
||||
c := make(chan os.Signal, 1)
|
||||
signal.Notify(c, syscall.SIGWINCH)
|
||||
signal.Notify(c, os.Interrupt)
|
||||
go func() {
|
||||
for sig := range c {
|
||||
switch sig {
|
||||
case syscall.SIGWINCH:
|
||||
C.rl_resize_terminal()
|
||||
|
||||
case os.Interrupt:
|
||||
C.rl_cleanup_after_signal()
|
||||
default:
|
||||
|
||||
}
|
||||
}
|
||||
}()
|
||||
}
|
||||
|
||||
func readLine(prompt *string) *string {
|
||||
var p *C.char
|
||||
|
||||
//readline allows an empty prompt(NULL)
|
||||
if prompt != nil {
|
||||
p = C.CString(*prompt)
|
||||
}
|
||||
|
||||
ret := C.readline(p)
|
||||
|
||||
if p != nil {
|
||||
C.free(unsafe.Pointer(p))
|
||||
}
|
||||
|
||||
if ret == nil {
|
||||
return nil
|
||||
} //EOF
|
||||
|
||||
s := C.GoString(ret)
|
||||
C.free(unsafe.Pointer(ret))
|
||||
return &s
|
||||
}
|
||||
|
||||
func addHistory(s string) {
|
||||
p := C.CString(s)
|
||||
C.add_history(p)
|
||||
C.free(unsafe.Pointer(p))
|
||||
}
|
||||
|
||||
var indentCount = 0
|
||||
var str = ""
|
||||
|
||||
func (self *JSRepl) setIndent() {
|
||||
open := strings.Count(str, "{")
|
||||
open += strings.Count(str, "(")
|
||||
closed := strings.Count(str, "}")
|
||||
closed += strings.Count(str, ")")
|
||||
indentCount = open - closed
|
||||
if indentCount <= 0 {
|
||||
self.prompt = "> "
|
||||
} else {
|
||||
self.prompt = strings.Join(make([]string, indentCount*2), "..")
|
||||
self.prompt += " "
|
||||
}
|
||||
}
|
||||
|
||||
func (self *JSRepl) read() {
|
||||
initReadLine()
|
||||
L:
|
||||
for {
|
||||
switch result := readLine(&self.prompt); true {
|
||||
case result == nil:
|
||||
break L
|
||||
|
||||
case *result != "":
|
||||
str += *result + "\n"
|
||||
|
||||
self.setIndent()
|
||||
|
||||
if indentCount <= 0 {
|
||||
if *result == "exit" {
|
||||
self.Stop()
|
||||
break L
|
||||
}
|
||||
|
||||
hist := str[:len(str)-1]
|
||||
addHistory(hist) //allow user to recall this line
|
||||
self.history.WriteString(str)
|
||||
|
||||
self.parseInput(str)
|
||||
|
||||
str = ""
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (self *JSRepl) PrintValue(v interface{}) {
|
||||
method, _ := self.re.Vm.Get("prettyPrint")
|
||||
v, err := self.re.Vm.ToValue(v)
|
||||
if err == nil {
|
||||
val, err := method.Call(method, v)
|
||||
if err == nil {
|
||||
fmt.Printf("%v", val)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -1 +0,0 @@
|
|||
repl_darwin.go
|
||||
|
|
@ -1,92 +0,0 @@
|
|||
// Copyright (c) 2013-2014, Jeffrey Wilcke. All rights reserved.
|
||||
//
|
||||
// This library is free software; you can redistribute it and/or
|
||||
// modify it under the terms of the GNU General Public
|
||||
// License as published by the Free Software Foundation; either
|
||||
// version 2.1 of the License, or (at your option) any later version.
|
||||
//
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
// General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License
|
||||
// along with this library; if not, write to the Free Software
|
||||
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
||||
// MA 02110-1301 USA
|
||||
|
||||
package ethrepl
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"fmt"
|
||||
"os"
|
||||
"strings"
|
||||
)
|
||||
|
||||
func (self *JSRepl) read() {
|
||||
reader := bufio.NewReader(os.Stdin)
|
||||
for {
|
||||
fmt.Printf(self.prompt)
|
||||
str, _, err := reader.ReadLine()
|
||||
if err != nil {
|
||||
fmt.Println("Error reading input", err)
|
||||
} else {
|
||||
if string(str) == "exit" {
|
||||
self.Stop()
|
||||
break
|
||||
} else {
|
||||
self.parseInput(string(str))
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func addHistory(s string) {
|
||||
}
|
||||
|
||||
func printColored(outputVal string) {
|
||||
for outputVal != "" {
|
||||
codePart := ""
|
||||
if strings.HasPrefix(outputVal, "\033[32m") {
|
||||
codePart = "\033[32m"
|
||||
changeColor(2)
|
||||
}
|
||||
if strings.HasPrefix(outputVal, "\033[1m\033[30m") {
|
||||
codePart = "\033[1m\033[30m"
|
||||
changeColor(8)
|
||||
}
|
||||
if strings.HasPrefix(outputVal, "\033[31m") {
|
||||
codePart = "\033[31m"
|
||||
changeColor(red)
|
||||
}
|
||||
if strings.HasPrefix(outputVal, "\033[35m") {
|
||||
codePart = "\033[35m"
|
||||
changeColor(5)
|
||||
}
|
||||
if strings.HasPrefix(outputVal, "\033[0m") {
|
||||
codePart = "\033[0m"
|
||||
resetColorful()
|
||||
}
|
||||
textPart := outputVal[len(codePart):len(outputVal)]
|
||||
index := strings.Index(textPart, "\033")
|
||||
if index == -1 {
|
||||
outputVal = ""
|
||||
} else {
|
||||
outputVal = textPart[index:len(textPart)]
|
||||
textPart = textPart[0:index]
|
||||
}
|
||||
fmt.Printf("%v", textPart)
|
||||
}
|
||||
}
|
||||
|
||||
func (self *JSRepl) PrintValue(v interface{}) {
|
||||
method, _ := self.re.Vm.Get("prettyPrint")
|
||||
v, err := self.re.Vm.ToValue(v)
|
||||
if err == nil {
|
||||
val, err := method.Call(method, v)
|
||||
if err == nil {
|
||||
printColored(fmt.Sprintf("%v", val))
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue