feat: add teleportr binary and Makefile skeleton

go/teleportr/.gitignore

+/teleportr

go/teleportr/Makefile

+GITCOMMIT := $(shell git rev-parse HEAD)
+GITDATE := $(shell git show -s --format='%ct')
+GITVERSION := $(shell cat package.json | jq .version)
+
+LDFLAGSSTRING +=-X main.GitCommit=$(GITCOMMIT)
+LDFLAGSSTRING +=-X main.GitDate=$(GITDATE)
+LDFLAGSSTRING +=-X main.GitVersion=$(GITVERSION)
+LDFLAGS := -ldflags "$(LDFLAGSSTRING)"
+
+teleportr:
+	env GO111MODULE=on go build -v $(LDFLAGS) ./cmd/teleportr
+
+clean:
+	rm teleportr
+
+test:
+	go test -v ./...
+
+lint: 
+	golangci-lint run ./...
+
+.PHONY: \
+	teleportr \
+	clean \
+	test \
+	lint

go/teleportr/cmd/teleportr/main.go

+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/urfave/cli"
+
+	"github.com/ethereum-optimism/optimism/go/teleportr/flags"
+)
+
+var (
+	GitVersion = ""
+	GitCommit  = ""
+	GitDate    = ""
+)
+
+func main() {
+	// Set up logger with a default INFO level in case we fail to parse flags.
+	// Otherwise the final critical log won't show what the parsing error was.
+	log.Root().SetHandler(
+		log.LvlFilterHandler(
+			log.LvlInfo,
+			log.StreamHandler(os.Stdout, log.TerminalFormat(true)),
+		),
+	)
+
+	app := cli.NewApp()
+	app.Flags = flags.Flags
+	app.Version = fmt.Sprintf("%s-%s-%s", GitVersion, GitCommit, GitDate)
+	app.Name = "teleportr"
+	app.Usage = "Teleportr"
+	app.Description = "Teleportr bridge from L1 to L2"
+
+	app.Action = func(_ *cli.Context) error {
+		return nil
+	}
+	err := app.Run(os.Args)
+	if err != nil {
+		log.Crit("Application failed", "message", err)
+	}
+}

go/teleportr/package.json

+{
+	"name": "@eth-optimism/teleportr",
+	"version": "0.0.0",
+	"private": true,
+	"devDependencies": {}
+}