Carry module identity through candidate results

check.go

@@ -18,9 +18,13 @@ var ErrInvalidVersion = candidate.ErrInvalidVersion
 var ErrUnexpectedPushURL = publish.ErrUnexpectedPushURL
 
 // Candidate identifies one committed local source revision selected for
-// validation.
+// validation. ModuleDir is the absolute selected module directory, ModulePath
+// is its declared Go import path, and Tag is the complete derived Git tag.
 type Candidate struct {
 	RepositoryDir string
+	ModuleDir     string
+	ModulePath    string
+	Tag           string
 	Commit        string
 	Version       string
 }
@@ -30,9 +34,12 @@ type Candidate struct {
 // no remote availability claim.
 type ReleaseRequest struct {
 	RepositoryDir string
-	Product       string
-	Version       string
-	Remote        string
+	// ModuleDir selects a repository-relative module directory; empty selects
+	// the repository root.
+	ModuleDir string
+	Product   string
+	Version   string
+	Remote    string
 	// ExpectedPushURL optionally requires Publish's resolved push URL to match
 	// this string exactly before validation or tag creation. Check ignores this
 	// publication-only expectation. A mismatch returns ErrUnexpectedPushURL.
@@ -107,9 +114,12 @@ type GoValidationSpec struct {
 }
 
 // Check validates one local, committed release candidate. It requires a clean
-// worktree and index on main, a committed note matching Product and Version,
-// and an unused local tag. It always runs the offline Go test suite with the
-// available compatible local Go toolchain and Go host target, then calls
+// worktree and index on main, a selected module declaration and module-local
+// committed note matching Product and Version, and an unused local tag. An
+// empty ModuleDir selects the repository root. The module declaration
+// determines the full Git tag for the semantic Version. It always runs the
+// offline Go test suite with the available compatible local Go toolchain and
+// Go host target, then calls
 // AdditionalChecks when supplied. Validation.Go.Race runs that one suite with
 // the race detector, Validation.Go.FullVet runs go vet after the suite instead
 // of test-time vet, and Validation.Go.CompileTargets compiles all packages for
@@ -139,19 +149,27 @@ type GoValidationSpec struct {
 func Check(ctx context.Context, request ReleaseRequest) (Candidate, error) {
 	checked, err := candidate.Check(ctx, candidateRequest(request))
 	if err != nil {
-		return Candidate{}, convertValidationError(err)
+		return publicCandidate(checked), convertValidationError(err)
 	}
+	return publicCandidate(checked), nil
+}
+
+func publicCandidate(checked candidate.Candidate) Candidate {
 	return Candidate{
 		RepositoryDir: checked.RepositoryDir,
+		ModuleDir:     checked.ModuleDir,
+		ModulePath:    checked.ModulePath,
+		Tag:           checked.Tag,
 		Commit:        checked.Commit,
 		Version:       checked.Version,
-	}, nil
+	}
 }
 
 func candidateRequest(request ReleaseRequest) candidate.Request {
 	fileSize := internalFileSizeSettings(request.Validation.FileSize)
 	result := candidate.Request{
 		RepositoryDir: request.RepositoryDir,
+		ModuleDir:     request.ModuleDir,
 		Product:       request.Product,
 		Version:       request.Version,
 		Validation: validation.Settings{
@@ -203,10 +221,6 @@ func candidateChecks(checks func(context.Context, Candidate) error) func(context
 		return nil
 	}
 	return func(ctx context.Context, captured candidate.Candidate) error {
-		return checks(ctx, Candidate{
-			RepositoryDir: captured.RepositoryDir,
-			Commit:        captured.Commit,
-			Version:       captured.Version,
-		})
+		return checks(ctx, publicCandidate(captured))
 	}
 }