Move release mechanics behind the public facade

build.go

@@ -59,20 +59,12 @@ type BuildResult struct {
 // empty target set records source identity without running the Go toolchain.
 // Errors return partial build facts in the result.
 func Build(ctx context.Context, request BuildRequest) (BuildResult, error) {
-	targets := make([]internalbuild.Target, 0, len(request.Spec.Targets))
-	for _, target := range request.Spec.Targets {
-		targets = append(targets, internalbuild.Target{OS: target.OS, Arch: target.Arch})
-	}
 	result, err := internalbuild.Build(ctx, internalbuild.Request{
 		RepositoryDir: request.RepositoryDir,
 		Version:       request.Version,
-		Spec: internalbuild.Spec{
-			MainPackage: request.Spec.MainPackage,
-			BinaryName:  request.Spec.BinaryName,
-			Targets:     targets,
-		},
-		OutputDir: request.OutputDir,
-		Output:    request.Output,
+		Spec:          *internalBuildSpec(&request.Spec),
+		OutputDir:     request.OutputDir,
+		Output:        request.Output,
 	})
 	public := BuildResult{
 		RepositoryDir:   result.RepositoryDir,
@@ -99,3 +91,25 @@ func Build(ctx context.Context, request BuildRequest) (BuildResult, error) {
 	}
 	return public, err
 }
+
+func internalBuildSpec(spec *BuildSpec) *internalbuild.Spec {
+	if spec == nil {
+		return nil
+	}
+	result := &internalbuild.Spec{MainPackage: spec.MainPackage, BinaryName: spec.BinaryName}
+	for _, target := range spec.Targets {
+		result.Targets = append(result.Targets, internalbuild.Target{OS: target.OS, Arch: target.Arch})
+	}
+	return result
+}
+
+func internalBuildResult(result BuildResult) *internalbuild.Result {
+	converted := &internalbuild.Result{RepositoryDir: result.RepositoryDir, CandidateCommit: result.CandidateCommit, SourceVerified: result.SourceVerified, Version: result.Version, MainPackage: result.MainPackage, BinaryName: result.BinaryName, OutputDir: result.OutputDir, Compiler: result.Compiler}
+	for _, target := range result.Targets {
+		converted.Targets = append(converted.Targets, internalbuild.Target{OS: target.OS, Arch: target.Arch})
+	}
+	for _, artifact := range result.Artifacts {
+		converted.Artifacts = append(converted.Artifacts, internalbuild.Artifact{Path: artifact.Path, Filename: artifact.Filename, Target: internalbuild.Target{OS: artifact.Target.OS, Arch: artifact.Target.Arch}, SHA256: artifact.SHA256})
+	}
+	return converted
+}