plugeth/cmd/abigen/main.go
Shiming 00d10e610f
cmd/abigen: clarify abigen alias flag usage (#21875)
* doc: clarify abigen alias flag usage

update the `abigen --alias` flag help info, give an example to make it more clear

related issue: https://github.com/ethereum/go-ethereum/issues/21846

* Update cmd/abigen/main.go

Co-authored-by: ligi <ligi@ligi.de>

Co-authored-by: Martin Holst Swende <martin@swende.se>
Co-authored-by: ligi <ligi@ligi.de>
2020-12-12 17:36:32 +01:00

280 lines
8.2 KiB
Go

// Copyright 2016 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum 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 3 of the License, or
// (at your option) any later version.
//
// go-ethereum 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 go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"regexp"
"strings"
"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/cmd/utils"
"github.com/ethereum/go-ethereum/common/compiler"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/internal/flags"
"github.com/ethereum/go-ethereum/log"
"gopkg.in/urfave/cli.v1"
)
var (
// Git SHA1 commit hash of the release (set via linker flags)
gitCommit = ""
gitDate = ""
app *cli.App
// Flags needed by abigen
abiFlag = cli.StringFlag{
Name: "abi",
Usage: "Path to the Ethereum contract ABI json to bind, - for STDIN",
}
binFlag = cli.StringFlag{
Name: "bin",
Usage: "Path to the Ethereum contract bytecode (generate deploy method)",
}
typeFlag = cli.StringFlag{
Name: "type",
Usage: "Struct name for the binding (default = package name)",
}
jsonFlag = cli.StringFlag{
Name: "combined-json",
Usage: "Path to the combined-json file generated by compiler",
}
solFlag = cli.StringFlag{
Name: "sol",
Usage: "Path to the Ethereum contract Solidity source to build and bind",
}
solcFlag = cli.StringFlag{
Name: "solc",
Usage: "Solidity compiler to use if source builds are requested",
Value: "solc",
}
vyFlag = cli.StringFlag{
Name: "vy",
Usage: "Path to the Ethereum contract Vyper source to build and bind",
}
vyperFlag = cli.StringFlag{
Name: "vyper",
Usage: "Vyper compiler to use if source builds are requested",
Value: "vyper",
}
excFlag = cli.StringFlag{
Name: "exc",
Usage: "Comma separated types to exclude from binding",
}
pkgFlag = cli.StringFlag{
Name: "pkg",
Usage: "Package name to generate the binding into",
}
outFlag = cli.StringFlag{
Name: "out",
Usage: "Output file for the generated binding (default = stdout)",
}
langFlag = cli.StringFlag{
Name: "lang",
Usage: "Destination language for the bindings (go, java, objc)",
Value: "go",
}
aliasFlag = cli.StringFlag{
Name: "alias",
Usage: "Comma separated aliases for function and event renaming, e.g. original1=alias1, original2=alias2",
}
)
func init() {
app = flags.NewApp(gitCommit, gitDate, "ethereum checkpoint helper tool")
app.Flags = []cli.Flag{
abiFlag,
binFlag,
typeFlag,
jsonFlag,
solFlag,
solcFlag,
vyFlag,
vyperFlag,
excFlag,
pkgFlag,
outFlag,
langFlag,
aliasFlag,
}
app.Action = utils.MigrateFlags(abigen)
cli.CommandHelpTemplate = flags.OriginCommandHelpTemplate
}
func abigen(c *cli.Context) error {
utils.CheckExclusive(c, abiFlag, jsonFlag, solFlag, vyFlag) // Only one source can be selected.
if c.GlobalString(pkgFlag.Name) == "" {
utils.Fatalf("No destination package specified (--pkg)")
}
var lang bind.Lang
switch c.GlobalString(langFlag.Name) {
case "go":
lang = bind.LangGo
case "java":
lang = bind.LangJava
case "objc":
lang = bind.LangObjC
utils.Fatalf("Objc binding generation is uncompleted")
default:
utils.Fatalf("Unsupported destination language \"%s\" (--lang)", c.GlobalString(langFlag.Name))
}
// If the entire solidity code was specified, build and bind based on that
var (
abis []string
bins []string
types []string
sigs []map[string]string
libs = make(map[string]string)
aliases = make(map[string]string)
)
if c.GlobalString(abiFlag.Name) != "" {
// Load up the ABI, optional bytecode and type name from the parameters
var (
abi []byte
err error
)
input := c.GlobalString(abiFlag.Name)
if input == "-" {
abi, err = ioutil.ReadAll(os.Stdin)
} else {
abi, err = ioutil.ReadFile(input)
}
if err != nil {
utils.Fatalf("Failed to read input ABI: %v", err)
}
abis = append(abis, string(abi))
var bin []byte
if binFile := c.GlobalString(binFlag.Name); binFile != "" {
if bin, err = ioutil.ReadFile(binFile); err != nil {
utils.Fatalf("Failed to read input bytecode: %v", err)
}
if strings.Contains(string(bin), "//") {
utils.Fatalf("Contract has additional library references, please use other mode(e.g. --combined-json) to catch library infos")
}
}
bins = append(bins, string(bin))
kind := c.GlobalString(typeFlag.Name)
if kind == "" {
kind = c.GlobalString(pkgFlag.Name)
}
types = append(types, kind)
} else {
// Generate the list of types to exclude from binding
exclude := make(map[string]bool)
for _, kind := range strings.Split(c.GlobalString(excFlag.Name), ",") {
exclude[strings.ToLower(kind)] = true
}
var err error
var contracts map[string]*compiler.Contract
switch {
case c.GlobalIsSet(solFlag.Name):
contracts, err = compiler.CompileSolidity(c.GlobalString(solcFlag.Name), c.GlobalString(solFlag.Name))
if err != nil {
utils.Fatalf("Failed to build Solidity contract: %v", err)
}
case c.GlobalIsSet(vyFlag.Name):
output, err := compiler.CompileVyper(c.GlobalString(vyperFlag.Name), c.GlobalString(vyFlag.Name))
if err != nil {
utils.Fatalf("Failed to build Vyper contract: %v", err)
}
contracts = make(map[string]*compiler.Contract)
for n, contract := range output {
name := n
// Sanitize the combined json names to match the
// format expected by solidity.
if !strings.Contains(n, ":") {
// Remove extra path components
name = abi.ToCamelCase(strings.TrimSuffix(filepath.Base(name), ".vy"))
}
contracts[name] = contract
}
case c.GlobalIsSet(jsonFlag.Name):
jsonOutput, err := ioutil.ReadFile(c.GlobalString(jsonFlag.Name))
if err != nil {
utils.Fatalf("Failed to read combined-json from compiler: %v", err)
}
contracts, err = compiler.ParseCombinedJSON(jsonOutput, "", "", "", "")
if err != nil {
utils.Fatalf("Failed to read contract information from json output: %v", err)
}
}
// Gather all non-excluded contract for binding
for name, contract := range contracts {
if exclude[strings.ToLower(name)] {
continue
}
abi, err := json.Marshal(contract.Info.AbiDefinition) // Flatten the compiler parse
if err != nil {
utils.Fatalf("Failed to parse ABIs from compiler output: %v", err)
}
abis = append(abis, string(abi))
bins = append(bins, contract.Code)
sigs = append(sigs, contract.Hashes)
nameParts := strings.Split(name, ":")
types = append(types, nameParts[len(nameParts)-1])
libPattern := crypto.Keccak256Hash([]byte(name)).String()[2:36]
libs[libPattern] = nameParts[len(nameParts)-1]
}
}
// Extract all aliases from the flags
if c.GlobalIsSet(aliasFlag.Name) {
// We support multi-versions for aliasing
// e.g.
// foo=bar,foo2=bar2
// foo:bar,foo2:bar2
re := regexp.MustCompile(`(?:(\w+)[:=](\w+))`)
submatches := re.FindAllStringSubmatch(c.GlobalString(aliasFlag.Name), -1)
for _, match := range submatches {
aliases[match[1]] = match[2]
}
}
// Generate the contract binding
code, err := bind.Bind(types, abis, bins, sigs, c.GlobalString(pkgFlag.Name), lang, libs, aliases)
if err != nil {
utils.Fatalf("Failed to generate ABI binding: %v", err)
}
// Either flush it out to a file or display on the standard output
if !c.GlobalIsSet(outFlag.Name) {
fmt.Printf("%s\n", code)
return nil
}
if err := ioutil.WriteFile(c.GlobalString(outFlag.Name), []byte(code), 0600); err != nil {
utils.Fatalf("Failed to write ABI binding: %v", err)
}
return nil
}
func main() {
log.Root().SetHandler(log.LvlFilterHandler(log.LvlInfo, log.StreamHandler(os.Stderr, log.TerminalFormat(true))))
if err := app.Run(os.Args); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}