145 lines
4.3 KiB
Go
145 lines
4.3 KiB
Go
// Copyright 2019 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Package compiler wraps the Solidity and Vyper compiler executables (solc; vyper).
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package compiler
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"os/exec"
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"strconv"
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"strings"
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)
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// Vyper contains information about the vyper compiler.
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type Vyper struct {
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Path, Version, FullVersion string
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Major, Minor, Patch int
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}
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func (s *Vyper) makeArgs() []string {
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p := []string{
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"-f", "combined_json",
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}
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return p
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}
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// VyperVersion runs vyper and parses its version output.
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func VyperVersion(vyper string) (*Vyper, error) {
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if vyper == "" {
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vyper = "vyper"
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}
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var out bytes.Buffer
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cmd := exec.Command(vyper, "--version")
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cmd.Stdout = &out
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err := cmd.Run()
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if err != nil {
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return nil, err
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}
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matches := versionRegexp.FindStringSubmatch(out.String())
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if len(matches) != 4 {
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return nil, fmt.Errorf("can't parse vyper version %q", out.String())
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}
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s := &Vyper{Path: cmd.Path, FullVersion: out.String(), Version: matches[0]}
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if s.Major, err = strconv.Atoi(matches[1]); err != nil {
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return nil, err
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}
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if s.Minor, err = strconv.Atoi(matches[2]); err != nil {
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return nil, err
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}
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if s.Patch, err = strconv.Atoi(matches[3]); err != nil {
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return nil, err
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}
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return s, nil
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}
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// CompileVyper compiles all given Vyper source files.
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func CompileVyper(vyper string, sourcefiles ...string) (map[string]*Contract, error) {
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if len(sourcefiles) == 0 {
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return nil, errors.New("vyper: no source files")
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}
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source, err := slurpFiles(sourcefiles)
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if err != nil {
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return nil, err
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}
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s, err := VyperVersion(vyper)
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if err != nil {
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return nil, err
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}
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args := s.makeArgs()
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cmd := exec.Command(s.Path, append(args, sourcefiles...)...)
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return s.run(cmd, source)
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}
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func (s *Vyper) run(cmd *exec.Cmd, source string) (map[string]*Contract, error) {
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var stderr, stdout bytes.Buffer
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cmd.Stderr = &stderr
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cmd.Stdout = &stdout
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if err := cmd.Run(); err != nil {
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return nil, fmt.Errorf("vyper: %v\n%s", err, stderr.Bytes())
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}
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return ParseVyperJSON(stdout.Bytes(), source, s.Version, s.Version, strings.Join(s.makeArgs(), " "))
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}
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// ParseVyperJSON takes the direct output of a vyper --f combined_json run and
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// parses it into a map of string contract name to Contract structs. The
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// provided source, language and compiler version, and compiler options are all
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// passed through into the Contract structs.
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//
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// The vyper output is expected to contain ABI and source mapping.
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//
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// Returns an error if the JSON is malformed or missing data, or if the JSON
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// embedded within the JSON is malformed.
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func ParseVyperJSON(combinedJSON []byte, source string, languageVersion string, compilerVersion string, compilerOptions string) (map[string]*Contract, error) {
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var output map[string]interface{}
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if err := json.Unmarshal(combinedJSON, &output); err != nil {
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return nil, err
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}
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// Compilation succeeded, assemble and return the contracts.
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contracts := make(map[string]*Contract)
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for name, info := range output {
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// Parse the individual compilation results.
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if name == "version" {
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continue
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}
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c := info.(map[string]interface{})
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contracts[name] = &Contract{
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Code: c["bytecode"].(string),
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RuntimeCode: c["bytecode_runtime"].(string),
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Info: ContractInfo{
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Source: source,
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Language: "Vyper",
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LanguageVersion: languageVersion,
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CompilerVersion: compilerVersion,
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CompilerOptions: compilerOptions,
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SrcMap: c["source_map"],
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SrcMapRuntime: "",
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AbiDefinition: c["abi"],
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UserDoc: "",
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DeveloperDoc: "",
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Metadata: "",
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},
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}
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}
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return contracts, nil
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}
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