221 lines
6.8 KiB
Go
221 lines
6.8 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// go-ethereum 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
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// GNU 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 go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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package main
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import (
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"fmt"
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"os"
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"os/signal"
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"path/filepath"
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"strings"
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"syscall"
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"github.com/ethereum/go-ethereum/cmd/utils"
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"github.com/ethereum/go-ethereum/console"
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"github.com/ethereum/go-ethereum/node"
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"github.com/ethereum/go-ethereum/rpc"
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"gopkg.in/urfave/cli.v1"
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)
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var (
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consoleFlags = []cli.Flag{utils.JSpathFlag, utils.ExecFlag, utils.PreloadJSFlag}
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consoleCommand = cli.Command{
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Action: utils.MigrateFlags(localConsole),
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Name: "console",
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Usage: "Start an interactive JavaScript environment",
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Flags: append(append(append(nodeFlags, rpcFlags...), consoleFlags...), whisperFlags...),
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Category: "CONSOLE COMMANDS",
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Description: `
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The Geth console is an interactive shell for the JavaScript runtime environment
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which exposes a node admin interface as well as the Ðapp JavaScript API.
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See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Console.`,
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}
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attachCommand = cli.Command{
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Action: utils.MigrateFlags(remoteConsole),
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Name: "attach",
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Usage: "Start an interactive JavaScript environment (connect to node)",
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ArgsUsage: "[endpoint]",
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Flags: append(consoleFlags, utils.DataDirFlag),
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Category: "CONSOLE COMMANDS",
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Description: `
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The Geth console is an interactive shell for the JavaScript runtime environment
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which exposes a node admin interface as well as the Ðapp JavaScript API.
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See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Console.
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This command allows to open a console on a running geth node.`,
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}
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javascriptCommand = cli.Command{
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Action: utils.MigrateFlags(ephemeralConsole),
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Name: "js",
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Usage: "Execute the specified JavaScript files",
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ArgsUsage: "<jsfile> [jsfile...]",
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Flags: append(nodeFlags, consoleFlags...),
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Category: "CONSOLE COMMANDS",
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Description: `
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The JavaScript VM exposes a node admin interface as well as the Ðapp
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JavaScript API. See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Console`,
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}
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)
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// localConsole starts a new geth node, attaching a JavaScript console to it at the
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// same time.
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func localConsole(ctx *cli.Context) error {
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// Create and start the node based on the CLI flags
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node := makeFullNode(ctx)
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startNode(ctx, node)
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defer node.Stop()
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// Attach to the newly started node and start the JavaScript console
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client, err := node.Attach()
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if err != nil {
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utils.Fatalf("Failed to attach to the inproc geth: %v", err)
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}
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config := console.Config{
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DataDir: utils.MakeDataDir(ctx),
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DocRoot: ctx.GlobalString(utils.JSpathFlag.Name),
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Client: client,
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Preload: utils.MakeConsolePreloads(ctx),
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}
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console, err := console.New(config)
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if err != nil {
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utils.Fatalf("Failed to start the JavaScript console: %v", err)
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}
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defer console.Stop(false)
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// If only a short execution was requested, evaluate and return
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if script := ctx.GlobalString(utils.ExecFlag.Name); script != "" {
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console.Evaluate(script)
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return nil
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}
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// Otherwise print the welcome screen and enter interactive mode
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console.Welcome()
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console.Interactive()
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return nil
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}
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// remoteConsole will connect to a remote geth instance, attaching a JavaScript
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// console to it.
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func remoteConsole(ctx *cli.Context) error {
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// Attach to a remotely running geth instance and start the JavaScript console
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endpoint := ctx.Args().First()
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if endpoint == "" {
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path := node.DefaultDataDir()
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if ctx.GlobalIsSet(utils.DataDirFlag.Name) {
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path = ctx.GlobalString(utils.DataDirFlag.Name)
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}
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if path != "" {
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if ctx.GlobalBool(utils.TestnetFlag.Name) {
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path = filepath.Join(path, "testnet")
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} else if ctx.GlobalBool(utils.RinkebyFlag.Name) {
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path = filepath.Join(path, "rinkeby")
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}
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}
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endpoint = fmt.Sprintf("%s/geth.ipc", path)
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}
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client, err := dialRPC(endpoint)
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if err != nil {
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utils.Fatalf("Unable to attach to remote geth: %v", err)
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}
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config := console.Config{
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DataDir: utils.MakeDataDir(ctx),
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DocRoot: ctx.GlobalString(utils.JSpathFlag.Name),
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Client: client,
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Preload: utils.MakeConsolePreloads(ctx),
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}
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console, err := console.New(config)
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if err != nil {
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utils.Fatalf("Failed to start the JavaScript console: %v", err)
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}
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defer console.Stop(false)
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if script := ctx.GlobalString(utils.ExecFlag.Name); script != "" {
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console.Evaluate(script)
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return nil
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}
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// Otherwise print the welcome screen and enter interactive mode
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console.Welcome()
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console.Interactive()
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return nil
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}
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// dialRPC returns a RPC client which connects to the given endpoint.
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// The check for empty endpoint implements the defaulting logic
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// for "geth attach" and "geth monitor" with no argument.
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func dialRPC(endpoint string) (*rpc.Client, error) {
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if endpoint == "" {
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endpoint = node.DefaultIPCEndpoint(clientIdentifier)
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} else if strings.HasPrefix(endpoint, "rpc:") || strings.HasPrefix(endpoint, "ipc:") {
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// Backwards compatibility with geth < 1.5 which required
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// these prefixes.
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endpoint = endpoint[4:]
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}
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return rpc.Dial(endpoint)
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}
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// ephemeralConsole starts a new geth node, attaches an ephemeral JavaScript
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// console to it, executes each of the files specified as arguments and tears
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// everything down.
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func ephemeralConsole(ctx *cli.Context) error {
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// Create and start the node based on the CLI flags
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node := makeFullNode(ctx)
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startNode(ctx, node)
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defer node.Stop()
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// Attach to the newly started node and start the JavaScript console
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client, err := node.Attach()
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if err != nil {
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utils.Fatalf("Failed to attach to the inproc geth: %v", err)
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}
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config := console.Config{
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DataDir: utils.MakeDataDir(ctx),
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DocRoot: ctx.GlobalString(utils.JSpathFlag.Name),
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Client: client,
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Preload: utils.MakeConsolePreloads(ctx),
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}
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console, err := console.New(config)
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if err != nil {
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utils.Fatalf("Failed to start the JavaScript console: %v", err)
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}
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defer console.Stop(false)
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// Evaluate each of the specified JavaScript files
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for _, file := range ctx.Args() {
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if err = console.Execute(file); err != nil {
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utils.Fatalf("Failed to execute %s: %v", file, err)
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}
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}
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// Wait for pending callbacks, but stop for Ctrl-C.
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abort := make(chan os.Signal, 1)
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signal.Notify(abort, syscall.SIGINT, syscall.SIGTERM)
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go func() {
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<-abort
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os.Exit(0)
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}()
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console.Stop(true)
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return nil
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}
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