260 lines
8.1 KiB
Go
260 lines
8.1 KiB
Go
// Package build compiles versioned application binaries for explicit targets.
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package build
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import (
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"context"
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"crypto/sha256"
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"encoding/hex"
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"errors"
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"fmt"
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"io"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"gitea.maximumdirect.net/eric/ReleaseKit/internal/artifact"
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"gitea.maximumdirect.net/eric/ReleaseKit/internal/candidate"
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"gitea.maximumdirect.net/eric/ReleaseKit/internal/gotool"
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"gitea.maximumdirect.net/eric/ReleaseKit/internal/versioncontract"
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)
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type Target = artifact.Target
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type Spec struct {
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MainPackage string
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BinaryName string
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Targets []Target
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}
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type Request struct {
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RepositoryDir string
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Version string
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Spec Spec
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OutputDir string
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Output io.Writer
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}
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type Artifact struct {
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Path string
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Filename string
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Target Target
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SHA256 string
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}
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type Result struct {
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RepositoryDir string
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CandidateCommit string
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SourceVerified bool
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Version string
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MainPackage string
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BinaryName string
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OutputDir string
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Targets []Target
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Artifacts []Artifact
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Compiler string
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}
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func Build(ctx context.Context, request Request) (Result, error) {
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result := Result{
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Version: request.Version,
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MainPackage: request.Spec.MainPackage,
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BinaryName: request.Spec.BinaryName,
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Targets: artifact.NormalizeTargets(request.Spec.Targets),
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}
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if !versioncontract.ValidStableVersion(request.Version) {
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return result, fmt.Errorf("%w: %q", candidate.ErrInvalidVersion, request.Version)
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}
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if request.RepositoryDir == "" {
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return result, errors.New("build requires a repository directory")
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}
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if len(result.Targets) != 0 {
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if request.Spec.MainPackage == "" {
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return result, errors.New("build requires a main package when targets are selected")
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}
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if !artifact.ValidComponent(request.Spec.BinaryName) {
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return result, fmt.Errorf("unsafe binary name %q", request.Spec.BinaryName)
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}
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for _, target := range result.Targets {
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if !artifact.ValidComponent(target.OS) || !artifact.ValidComponent(target.Arch) {
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return result, fmt.Errorf("unsafe target %q/%q", target.OS, target.Arch)
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}
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}
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}
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if err := ctx.Err(); err != nil {
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return result, fmt.Errorf("build canceled: %w", err)
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}
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repositoryDir, err := filepath.Abs(request.RepositoryDir)
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if err != nil {
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return result, fmt.Errorf("resolve repository directory: %w", err)
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}
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result.RepositoryDir = repositoryDir
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commit, err := gitCommit(ctx, repositoryDir)
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if err != nil {
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return result, err
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}
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result.CandidateCommit = commit
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cleanBefore, err := cleanSource(ctx, repositoryDir)
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if err != nil {
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return result, err
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}
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if len(result.Targets) == 0 {
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result.OutputDir = resolvedOutputDir(repositoryDir, request.OutputDir)
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return result, nil
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}
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result.OutputDir = resolvedOutputDir(repositoryDir, request.OutputDir)
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declarations := artifact.ExpectedBuild(request.Spec.BinaryName, request.Version, result.Targets)
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filenames := make([]string, len(declarations))
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for i, declaration := range declarations {
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filenames[i] = declaration.Filename
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}
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if err := os.MkdirAll(result.OutputDir, 0o755); err != nil {
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return result, fmt.Errorf("create build output directory %q: %w", result.OutputDir, err)
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}
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goTool, err := gotool.New(ctx, repositoryDir)
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if err != nil {
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return result, fmt.Errorf("prepare Go toolchain: %w", err)
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}
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compiler, err := goTool.Run(ctx, repositoryDir, gotool.Native, gotool.Target{}, nil, "version")
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if err != nil {
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return result, fmt.Errorf("identify Go compiler: %w", err)
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}
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result.Compiler = strings.TrimSpace(string(compiler))
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goHost := goTool.HostTarget()
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host := Target{OS: goHost.OS, Arch: goHost.Arch}
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for index, target := range result.Targets {
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if err := ctx.Err(); err != nil {
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return result, fmt.Errorf("build canceled: %w", err)
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}
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filename := filenames[index]
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path := filepath.Join(result.OutputDir, filename)
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if request.Output != nil {
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fmt.Fprintf(request.Output, "building %s/%s as %s\n", target.OS, target.Arch, filename)
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}
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if err := buildTarget(ctx, goTool, repositoryDir, request.Spec.MainPackage, path, request.Version, target); err != nil {
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return result, fmt.Errorf("build target %s/%s: %w", target.OS, target.Arch, err)
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}
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artifact := Artifact{Path: path, Filename: filename, Target: target}
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result.Artifacts = append(result.Artifacts, artifact)
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if err := hashArtifact(&result.Artifacts[len(result.Artifacts)-1]); err != nil {
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return result, fmt.Errorf("hash build output %q: %w", path, err)
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}
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}
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var smokePath string
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for _, artifact := range result.Artifacts {
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if artifact.Target == host {
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smokePath = artifact.Path
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break
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}
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}
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if smokePath == "" {
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temporaryDir, err := os.MkdirTemp("", "releasekit-native-smoke-")
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if err != nil {
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return result, fmt.Errorf("create native smoke directory: %w", err)
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}
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defer os.RemoveAll(temporaryDir)
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smokePath = filepath.Join(temporaryDir, request.Spec.BinaryName)
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if host.OS == "windows" {
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smokePath += ".exe"
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}
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if request.Output != nil {
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fmt.Fprintf(request.Output, "building temporary version check for %s/%s\n", host.OS, host.Arch)
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}
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if err := buildTarget(ctx, goTool, repositoryDir, request.Spec.MainPackage, smokePath, request.Version, host); err != nil {
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return result, fmt.Errorf("build native version check: %w", err)
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}
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}
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if request.Output != nil {
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fmt.Fprintf(request.Output, "checking %s version output\n", request.Spec.BinaryName)
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}
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if err := checkVersion(ctx, smokePath, request.Spec.BinaryName, request.Version); err != nil {
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return result, err
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}
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commitAfter, err := gitCommit(ctx, repositoryDir)
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if err != nil {
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return result, err
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}
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cleanAfter, err := cleanSource(ctx, repositoryDir)
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if err != nil {
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return result, err
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}
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result.SourceVerified = cleanBefore && cleanAfter && commitAfter == commit
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return result, nil
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}
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func resolvedOutputDir(repositoryDir, outputDir string) string {
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if outputDir == "" {
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outputDir = filepath.Join(repositoryDir, "dist")
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} else if !filepath.IsAbs(outputDir) {
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outputDir = filepath.Join(repositoryDir, outputDir)
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}
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resolved, err := filepath.Abs(outputDir)
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if err != nil {
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return filepath.Clean(outputDir)
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}
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return resolved
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}
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func gitCommit(ctx context.Context, repositoryDir string) (string, error) {
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command := exec.CommandContext(ctx, "git", "-C", repositoryDir, "rev-parse", "--verify", "HEAD^{commit}")
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output, err := command.Output()
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if err != nil {
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if ctx.Err() != nil {
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return "", fmt.Errorf("read source commit: %w", ctx.Err())
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}
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return "", fmt.Errorf("read source commit: %w", err)
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}
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return strings.TrimSpace(string(output)), nil
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}
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func buildTarget(ctx context.Context, goTool *gotool.Tool, repositoryDir, mainPackage, outputPath, version string, target Target) error {
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ldflags := "-s -w -X " + versioncontract.InjectedVersionLinkerSymbol + "=" + version
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_, err := goTool.Run(ctx, repositoryDir, gotool.Static, gotool.Target{OS: target.OS, Arch: target.Arch}, nil,
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"build", "-o", outputPath, "-mod=readonly", "-trimpath", "-buildvcs=false", "-ldflags", ldflags, mainPackage)
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return err
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}
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func hashArtifact(artifact *Artifact) error {
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file, err := os.Open(artifact.Path)
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if err != nil {
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return err
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}
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defer file.Close()
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hash := sha256.New()
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if _, err := io.Copy(hash, file); err != nil {
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return err
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}
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artifact.SHA256 = hex.EncodeToString(hash.Sum(nil))
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return nil
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}
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func checkVersion(ctx context.Context, binaryPath, binaryName, version string) error {
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command := exec.CommandContext(ctx, binaryPath, "version")
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output, err := command.CombinedOutput()
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if err != nil {
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if ctx.Err() != nil {
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return fmt.Errorf("run native version check: %w", ctx.Err())
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}
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return fmt.Errorf("run native version check: %w: %s", err, strings.TrimSpace(string(output)))
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}
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want := binaryName + " " + version + "\n"
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if string(output) != want {
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return fmt.Errorf("native version output = %q, want %q", output, want)
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}
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return nil
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}
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func cleanSource(ctx context.Context, repositoryDir string) (bool, error) {
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command := exec.CommandContext(ctx, "git", "-C", repositoryDir, "status", "--porcelain", "--untracked-files=all")
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output, err := command.Output()
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if err != nil {
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return false, fmt.Errorf("inspect build source: %w", err)
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}
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return len(output) == 0, nil
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}
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