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// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package compiler
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"regexp"
"strings"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
)
const (
// flair = "Christian <c@ethdev.com> and Lefteris <lefteris@ethdev.com> (c) 2014-2015"
flair = ""
languageVersion = "0"
)
var (
versionRegExp = regexp.MustCompile("[0-9]+.[0-9]+.[0-9]+")
params = []string{
"--binary", // Request to output the contract in binary (hexadecimal).
"file", //
"--json-abi", // Request to output the contract's JSON ABI interface.
"file", //
"--natspec-user", // Request to output the contract's Natspec user documentation.
"file", //
"--natspec-dev", // Request to output the contract's Natspec developer documentation.
"file",
"--add-std",
"1",
}
)
type Contract struct {
Code string `json:"code"`
Info ContractInfo `json:"info"`
}
type ContractInfo struct {
Source string `json:"source"`
Language string `json:"language"`
LanguageVersion string `json:"languageVersion"`
CompilerVersion string `json:"compilerVersion"`
AbiDefinition interface{} `json:"abiDefinition"`
UserDoc interface{} `json:"userDoc"`
DeveloperDoc interface{} `json:"developerDoc"`
}
type Solidity struct {
solcPath string
version string
}
func New(solcPath string) (sol *Solidity, err error) {
// set default solc
if len(solcPath) == 0 {
solcPath = "solc"
}
solcPath, err = exec.LookPath(solcPath)
if err != nil {
return
}
cmd := exec.Command(solcPath, "--version")
var out bytes.Buffer
cmd.Stdout = &out
err = cmd.Run()
if err != nil {
return
}
version := versionRegExp.FindString(out.String())
sol = &Solidity{
solcPath: solcPath,
version: version,
}
glog.V(logger.Info).Infoln(sol.Info())
return
}
func (sol *Solidity) Info() string {
return fmt.Sprintf("solc v%s\nSolidity Compiler: %s\n%s", sol.version, sol.solcPath, flair)
}
func (sol *Solidity) Version() string {
return sol.version
}
// Compile builds and returns all the contracts contained within a source string.
func (sol *Solidity) Compile(source string) (map[string]*Contract, error) {
// Short circuit if no source code was specified
if len(source) == 0 {
return nil, errors.New("solc: empty source string")
}
// Create a safe place to dump compilation output
wd, err := ioutil.TempDir("", "solc")
if err != nil {
return nil, fmt.Errorf("solc: failed to create temporary build folder: %v", err)
}
defer os.RemoveAll(wd)
// Assemble the compiler command, change to the temp folder and capture any errors
stderr := new(bytes.Buffer)
cmd := exec.Command(sol.solcPath, params...)
cmd.Dir = wd
cmd.Stdin = strings.NewReader(source)
cmd.Stderr = stderr
if err := cmd.Run(); err != nil {
return nil, fmt.Errorf("solc: %v\n%s", err, string(stderr.Bytes()))
}
// Sanity check that something was actually built
matches, _ := filepath.Glob(wd + "/*.binary")
if len(matches) < 1 {
return nil, fmt.Errorf("solc: no build results found")
}
// Compilation succeeded, assemble and return the contracts
contracts := make(map[string]*Contract)
for _, path := range matches {
_, file := filepath.Split(path)
base := strings.Split(file, ".")[0]
// Parse the individual compilation results (code binary, ABI definitions, user and dev docs)
var binary []byte
if binary, err = ioutil.ReadFile(filepath.Join(wd, base+".binary")); err != nil {
return nil, fmt.Errorf("solc: error reading compiler output for code: %v", err)
}
var abi interface{}
if blob, err := ioutil.ReadFile(filepath.Join(wd, base+".abi")); err != nil {
return nil, fmt.Errorf("solc: error reading abi definition: %v", err)
} else if err = json.Unmarshal(blob, &abi); err != nil {
return nil, fmt.Errorf("solc: error parsing abi definition: %v", err)
}
var userdoc interface{}
if blob, err := ioutil.ReadFile(filepath.Join(wd, base+".docuser")); err != nil {
return nil, fmt.Errorf("solc: error reading user doc: %v", err)
} else if err = json.Unmarshal(blob, &userdoc); err != nil {
return nil, fmt.Errorf("solc: error parsing user doc: %v", err)
}
var devdoc interface{}
if blob, err := ioutil.ReadFile(filepath.Join(wd, base+".docdev")); err != nil {
return nil, fmt.Errorf("solc: error reading dev doc: %v", err)
} else if err = json.Unmarshal(blob, &devdoc); err != nil {
return nil, fmt.Errorf("solc: error parsing dev doc: %v", err)
}
// Assemble the final contract
contracts[base] = &Contract{
Code: "0x" + string(binary),
Info: ContractInfo{
Source: source,
Language: "Solidity",
LanguageVersion: languageVersion,
CompilerVersion: sol.version,
AbiDefinition: abi,
UserDoc: userdoc,
DeveloperDoc: devdoc,
},
}
}
return contracts, nil
}
func SaveInfo(info *ContractInfo, filename string) (contenthash common.Hash, err error) {
infojson, err := json.Marshal(info)
if err != nil {
return
}
contenthash = common.BytesToHash(crypto.Sha3(infojson))
err = ioutil.WriteFile(filename, infojson, 0600)
return
}
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