Fixup: ManifestName rename and comment

go/runtime/bundle/bundle.go

@@ -135,7 +135,7 @@ func (bnd *Bundle) Validate() error {
 			// Ignore the manifest not having a digest entry, though
 			// it having one and being valid (while quite a feat) is
 			// also ok.
-			if fn == ManifestName {
+			if fn == ManifestPath {
 				continue
 			}
 			return fmt.Errorf("runtime/bundle: missing digest: '%s'", fn)
@@ -321,7 +321,7 @@ func (bnd *Bundle) verifySgxSignature(comp *Component) error {
 //
 // This needs to be used after doing modifications to bundles.
 func (bnd *Bundle) ResetManifest() {
-	delete(bnd.Data, ManifestName)
+	delete(bnd.Data, ManifestPath)
 }
 
 // Write serializes a runtime bundle to the on-disk representation.
@@ -336,7 +336,7 @@ func (bnd *Bundle) Write(fn string) error {
 	if err != nil {
 		return fmt.Errorf("runtime/bundle: failed to serialize manifest: %w", err)
 	}
-	if bnd.Data[ManifestName] != nil {
+	if bnd.Data[ManifestPath] != nil {
 		// While this is "ok", instead of trying to figure out if the
 		// deserialized manifest matches the serialied one, just bail.
 		return fmt.Errorf("runtime/bundle: data contains manifest entry")
@@ -352,7 +352,7 @@ func (bnd *Bundle) Write(fn string) error {
 	}
 	writeFiles := []writeFile{
 		{
-			fn: ManifestName,
+			fn: ManifestPath,
 			d:  NewBytesData(rawManifest),
 		},
 	}
@@ -474,7 +474,7 @@ func (bnd *Bundle) WriteExploded(dataDir string) (string, error) {
 
 		for _, v := range []string{
 			subDir,
-			bnd.ExplodedPath(dataDir, manifestPath),
+			bnd.ExplodedPath(dataDir, manifestMetadataSubdir),
 		} {
 			if err = os.MkdirAll(v, 0o700); err != nil {
 				return "", fmt.Errorf("runtime/bundle: failed to create asset sub-dir '%s': %w", v, err)
@@ -558,7 +558,7 @@ func Open(fn string, opts ...OpenOption) (_ *Bundle, err error) {
 		switch i {
 		case 0:
 			// Much like the JAR files, the manifest MUST come first.
-			if v.Name != ManifestName {
+			if v.Name != ManifestPath {
 				return nil, fmt.Errorf("runtime/bundle: invalid manifest file name: '%s'", v.Name)
 			}
 		default:
@@ -572,7 +572,7 @@ func Open(fn string, opts ...OpenOption) (_ *Bundle, err error) {
 
 	// Decode the manifest.
 	var manifest Manifest
-	d, ok := data[ManifestName]
+	d, ok := data[ManifestPath]
 	if !ok {
 		return nil, fmt.Errorf("runtime/bundle: missing manifest")
 	}

go/runtime/bundle/bundle_test.go

@@ -71,8 +71,8 @@ func TestBundle(t *testing.T) {
 
 		// Ignore the manifest, the bundle we used to create the file
 		// will not have it.
-		delete(bundle2.Manifest.Digests, ManifestName)
-		delete(bundle2.Data, ManifestName)
+		delete(bundle2.Manifest.Digests, ManifestPath)
+		delete(bundle2.Data, ManifestPath)
 
 		ensureBundlesEqual(t, bundle, bundle2, "opened bundle mismatch")
 
@@ -171,8 +171,8 @@ func TestDetachedBundle(t *testing.T) {
 
 		// Ignore the manifest, the bundle we used to create the file
 		// will not have it.
-		delete(bundle2.Manifest.Digests, ManifestName)
-		delete(bundle2.Data, ManifestName)
+		delete(bundle2.Manifest.Digests, ManifestPath)
+		delete(bundle2.Data, ManifestPath)
 
 		ensureBundlesEqual(t, bundle, bundle2, "opened bundle mismatch")
 	})

go/runtime/bundle/discovery.go

@@ -554,7 +554,7 @@ func (d *Discovery) cleanStaleExplodedBundles() {
 			if len(manifestHash) != 2*hash.Size {
 				continue
 			}
-			manifestPath := filepath.Join(bundlesDir, manifestHash, ManifestName)
+			manifestPath := filepath.Join(bundlesDir, manifestHash, ManifestPath)
 			data, err := os.ReadFile(manifestPath)
 			if err != nil {
 				d.logger.Error("error reading manifest file",

go/runtime/bundle/manifest.go

@@ -10,8 +10,9 @@ import (
 )
 
 const (
-	ManifestName = manifestPath + "/MANIFEST.MF"
-	manifestPath = "META-INF"
+	// ManifestPath is a relative path to manifest file inside a bundle.
+	ManifestPath           = manifestMetadataSubdir + "/MANIFEST.MF"
+	manifestMetadataSubdir = "META-INF"
 )
 
 // Manifest is a deserialized runtime bundle manifest.