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authorSteve Waldman <swaldman@mchange.com>2017-01-26 06:57:13 +0800
committerFelix Lange <fjl@twurst.com>2017-03-16 19:18:38 +0800
commit728a299728aaaeaf14f21bdaa9171e857f716b68 (patch)
tree3a7af69b5304bc2bcdfed888db6c64886e2f7c43 /common/compiler/solidity.go
parent61ede86737d57f62cb09de013191fc430d1dd3a2 (diff)
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common/compiler: add metadata output for solc > 0.4.6
Metadata is provided as JSON string, rather than as JSON object. This ensures that we can decode to a set of bytes that will be consistent with the swarm hash embedded in the code, without worrying about ambiguities of spacing, ordering, or escaping.
Diffstat (limited to 'common/compiler/solidity.go')
-rw-r--r--common/compiler/solidity.go95
1 files changed, 52 insertions, 43 deletions
diff --git a/common/compiler/solidity.go b/common/compiler/solidity.go
index d27bddd9f..abb803989 100644
--- a/common/compiler/solidity.go
+++ b/common/compiler/solidity.go
@@ -25,20 +25,11 @@ import (
"io/ioutil"
"os/exec"
"regexp"
+ "strconv"
"strings"
-
- "github.com/ethereum/go-ethereum/common"
- "github.com/ethereum/go-ethereum/crypto"
)
-var (
- versionRegexp = regexp.MustCompile(`[0-9]+\.[0-9]+\.[0-9]+`)
- solcParams = []string{
- "--combined-json", "bin,abi,userdoc,devdoc",
- "--add-std", // include standard lib contracts
- "--optimize", // code optimizer switched on
- }
-)
+var versionRegexp = regexp.MustCompile(`([0-9]+)\.([0-9]+)\.([0-9]+)`)
type Contract struct {
Code string `json:"code"`
@@ -54,17 +45,33 @@ type ContractInfo struct {
AbiDefinition interface{} `json:"abiDefinition"`
UserDoc interface{} `json:"userDoc"`
DeveloperDoc interface{} `json:"developerDoc"`
+ Metadata string `json:"metadata"`
}
// Solidity contains information about the solidity compiler.
type Solidity struct {
Path, Version, FullVersion string
+ Major, Minor, Patch int
}
// --combined-output format
type solcOutput struct {
- Contracts map[string]struct{ Bin, Abi, Devdoc, Userdoc string }
- Version string
+ Contracts map[string]struct {
+ Bin, Abi, Devdoc, Userdoc, Metadata string
+ }
+ Version string
+}
+
+func (s *Solidity) makeArgs() []string {
+ p := []string{
+ "--combined-json", "bin,abi,userdoc,devdoc",
+ "--add-std", // include standard lib contracts
+ "--optimize", // code optimizer switched on
+ }
+ if s.Major > 0 || s.Minor > 4 || s.Patch > 6 {
+ p[1] += ",metadata"
+ }
+ return p
}
// SolidityVersion runs solc and parses its version output.
@@ -75,13 +82,23 @@ func SolidityVersion(solc string) (*Solidity, error) {
var out bytes.Buffer
cmd := exec.Command(solc, "--version")
cmd.Stdout = &out
- if err := cmd.Run(); err != nil {
+ err := cmd.Run()
+ if err != nil {
+ return nil, err
+ }
+ matches := versionRegexp.FindStringSubmatch(out.String())
+ if len(matches) != 4 {
+ return nil, fmt.Errorf("can't parse solc version %q", out.String())
+ }
+ s := &Solidity{Path: cmd.Path, FullVersion: out.String(), Version: matches[0]}
+ if s.Major, err = strconv.Atoi(matches[1]); err != nil {
return nil, err
}
- s := &Solidity{
- Path: cmd.Path,
- FullVersion: out.String(),
- Version: versionRegexp.FindString(out.String()),
+ if s.Minor, err = strconv.Atoi(matches[2]); err != nil {
+ return nil, err
+ }
+ if s.Patch, err = strconv.Atoi(matches[3]); err != nil {
+ return nil, err
}
return s, nil
}
@@ -91,13 +108,14 @@ func CompileSolidityString(solc, source string) (map[string]*Contract, error) {
if len(source) == 0 {
return nil, errors.New("solc: empty source string")
}
- if solc == "" {
- solc = "solc"
+ s, err := SolidityVersion(solc)
+ if err != nil {
+ return nil, err
}
- args := append(solcParams, "--")
- cmd := exec.Command(solc, append(args, "-")...)
+ args := append(s.makeArgs(), "--")
+ cmd := exec.Command(s.Path, append(args, "-")...)
cmd.Stdin = strings.NewReader(source)
- return runsolc(cmd, source)
+ return s.run(cmd, source)
}
// CompileSolidity compiles all given Solidity source files.
@@ -109,15 +127,16 @@ func CompileSolidity(solc string, sourcefiles ...string) (map[string]*Contract,
if err != nil {
return nil, err
}
- if solc == "" {
- solc = "solc"
+ s, err := SolidityVersion(solc)
+ if err != nil {
+ return nil, err
}
- args := append(solcParams, "--")
- cmd := exec.Command(solc, append(args, sourcefiles...)...)
- return runsolc(cmd, source)
+ args := append(s.makeArgs(), "--")
+ cmd := exec.Command(s.Path, append(args, sourcefiles...)...)
+ return s.run(cmd, source)
}
-func runsolc(cmd *exec.Cmd, source string) (map[string]*Contract, error) {
+func (s *Solidity) run(cmd *exec.Cmd, source string) (map[string]*Contract, error) {
var stderr, stdout bytes.Buffer
cmd.Stderr = &stderr
cmd.Stdout = &stdout
@@ -128,7 +147,6 @@ func runsolc(cmd *exec.Cmd, source string) (map[string]*Contract, error) {
if err := json.Unmarshal(stdout.Bytes(), &output); err != nil {
return nil, err
}
- shortVersion := versionRegexp.FindString(output.Version)
// Compilation succeeded, assemble and return the contracts.
contracts := make(map[string]*Contract)
@@ -151,12 +169,13 @@ func runsolc(cmd *exec.Cmd, source string) (map[string]*Contract, error) {
Info: ContractInfo{
Source: source,
Language: "Solidity",
- LanguageVersion: shortVersion,
- CompilerVersion: shortVersion,
- CompilerOptions: strings.Join(solcParams, " "),
+ LanguageVersion: s.Version,
+ CompilerVersion: s.Version,
+ CompilerOptions: strings.Join(s.makeArgs(), " "),
AbiDefinition: abi,
UserDoc: userdoc,
DeveloperDoc: devdoc,
+ Metadata: info.Metadata,
},
}
}
@@ -174,13 +193,3 @@ func slurpFiles(files []string) (string, error) {
}
return concat.String(), nil
}
-
-// SaveInfo serializes info to the given file and returns its Keccak256 hash.
-func SaveInfo(info *ContractInfo, filename string) (common.Hash, error) {
- infojson, err := json.Marshal(info)
- if err != nil {
- return common.Hash{}, err
- }
- contenthash := common.BytesToHash(crypto.Keccak256(infojson))
- return contenthash, ioutil.WriteFile(filename, infojson, 0600)
-}