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package compiler
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path"
"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"
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",
}
)
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) Compile(source string) (contract *Contract, err error) {
if len(source) == 0 {
err = fmt.Errorf("empty source")
return
}
wd, err := ioutil.TempDir("", "solc")
if err != nil {
return
}
defer os.RemoveAll(wd)
in := strings.NewReader(source)
var out bytes.Buffer
// cwd set to temp dir
cmd := exec.Command(sol.solcPath, params...)
cmd.Dir = wd
cmd.Stdin = in
cmd.Stdout = &out
err = cmd.Run()
if err != nil {
err = fmt.Errorf("solc error: %v", err)
return
}
matches, _ := filepath.Glob(wd + "/*.binary")
if len(matches) < 1 {
err = fmt.Errorf("solc error: missing code output")
return
}
if len(matches) > 1 {
err = fmt.Errorf("multi-contract sources are not supported")
return
}
_, file := filepath.Split(matches[0])
base := strings.Split(file, ".")[0]
codeFile := path.Join(wd, base+".binary")
abiDefinitionFile := path.Join(wd, base+".abi")
userDocFile := path.Join(wd, base+".docuser")
developerDocFile := path.Join(wd, base+".docdev")
code, err := ioutil.ReadFile(codeFile)
if err != nil {
err = fmt.Errorf("error reading compiler output for code: %v", err)
return
}
abiDefinitionJson, err := ioutil.ReadFile(abiDefinitionFile)
if err != nil {
err = fmt.Errorf("error reading compiler output for abiDefinition: %v", err)
return
}
var abiDefinition interface{}
err = json.Unmarshal(abiDefinitionJson, &abiDefinition)
userDocJson, err := ioutil.ReadFile(userDocFile)
if err != nil {
err = fmt.Errorf("error reading compiler output for userDoc: %v", err)
return
}
var userDoc interface{}
err = json.Unmarshal(userDocJson, &userDoc)
developerDocJson, err := ioutil.ReadFile(developerDocFile)
if err != nil {
err = fmt.Errorf("error reading compiler output for developerDoc: %v", err)
return
}
var developerDoc interface{}
err = json.Unmarshal(developerDocJson, &developerDoc)
contract = &Contract{
Code: string(code),
Info: ContractInfo{
Source: source,
Language: "Solidity",
LanguageVersion: languageVersion,
CompilerVersion: sol.version,
AbiDefinition: abiDefinition,
UserDoc: userDoc,
DeveloperDoc: developerDoc,
},
}
return
}
func ExtractInfo(contract *Contract, filename string) (contenthash common.Hash, err error) {
contractInfo, err := json.Marshal(contract.Info)
if err != nil {
return
}
contenthash = common.BytesToHash(crypto.Sha3(contractInfo))
err = ioutil.WriteFile(filename, contractInfo, 0600)
return
}