// remoteConsole will connect to a remote geth instance, attaching a JavaScript
// console to it.
func remoteConsole(ctx *cli.Context) error {
// Attach to a remotely running geth instance and start the JavaScript console
client, err := utils.NewRemoteRPCClient(ctx)
if err != nil {
utils.Fatalf("Unable to attach to remote geth: %v", err)
}
config := console.Config{
DataDir: utils.MustMakeDataDir(ctx),
DocRoot: ctx.GlobalString(utils.JSpathFlag.Name),
Client: client,
Preload: utils.MakeConsolePreloads(ctx),
}
console, err := console.New(config)
if err != nil {
utils.Fatalf("Failed to start the JavaScript console: %v", err)
}
defer console.Stop(false)
// If only a short execution was requested, evaluate and return
if script := ctx.GlobalString(utils.ExecFlag.Name); script != "" {
console.Evaluate(script)
return nil
}
// Otherwise print the welcome screen and enter interactive mode
console.Welcome()
console.Interactive()
return nil
}
// initGenesis will initialise the given JSON format genesis file and writes it as
// the zero'd block (i.e. genesis) or will fail hard if it can't succeed.
func initGenesis(ctx *cli.Context) {
genesisPath := ctx.Args().First()
if len(genesisPath) == 0 {
utils.Fatalf("must supply path to genesis JSON file")
}
chainDb, err := ethdb.NewLDBDatabase(filepath.Join(utils.MustMakeDataDir(ctx), "chaindata"), 0, 0)
if err != nil {
utils.Fatalf("could not open database: %v", err)
}
genesisFile, err := os.Open(genesisPath)
if err != nil {
utils.Fatalf("failed to read genesis file: %v", err)
}
block, err := core.WriteGenesisBlock(chainDb, genesisFile)
if err != nil {
utils.Fatalf("failed to write genesis block: %v", err)
}
glog.V(logger.Info).Infof("successfully wrote genesis block and/or chain rule set: %x", block.Hash())
}