Make sure that unreferenced but changed bundle resources gets republished

Fixes #13748

resources/resource.go

@@ -24,6 +24,7 @@ import (
 	"sync/atomic"
 
 	"github.com/gohugoio/hugo/identity"
+	"github.com/gohugoio/hugo/lazy"
 	"github.com/gohugoio/hugo/resources/internal"
 
 	"github.com/gohugoio/hugo/common/hashing"
@@ -54,6 +55,7 @@ var (
 	_ identity.DependencyManagerProvider = (*genericResource)(nil)
 	_ identity.Identity                  = (*genericResource)(nil)
 	_ fileInfo                           = (*genericResource)(nil)
+	_ isPublishedProvider                = (*genericResource)(nil)
 )
 
 type ResourceSourceDescriptor struct {
@@ -242,6 +244,7 @@ type baseResourceInternal interface {
 	fileInfo
 	mediaTypeAssigner
 	targetPather
+	isPublishedProvider
 
 	ReadSeekCloser() (hugio.ReadSeekCloser, error)
 
@@ -355,7 +358,7 @@ func GetTestInfoForResource(r resource.Resource) GenericResourceTestInfo {
 
 // genericResource represents a generic linkable resource.
 type genericResource struct {
-	publishInit *sync.Once
+	publishInit *lazy.OnceMore
 
 	key     string
 	keyInit *sync.Once
@@ -536,6 +539,10 @@ func (l *genericResource) Publish() error {
 	return err
 }
 
+func (l *genericResource) isPublished() bool {
+	return l.publishInit.Done()
+}
+
 func (l *genericResource) RelPermalink() string {
 	return l.spec.PathSpec.GetBasePath(false) + paths.PathEscape(l.paths.TargetLink())
 }
@@ -629,7 +636,7 @@ func (rc *genericResource) cloneWithUpdates(u *transformationUpdate) (baseResour
 }
 
 func (l genericResource) clone() *genericResource {
-	l.publishInit = &sync.Once{}
+	l.publishInit = &lazy.OnceMore{}
 	l.keyInit = &sync.Once{}
 	return &l
 }
@@ -643,6 +650,10 @@ type targetPather interface {
 	TargetPath() string
 }
 
+type isPublishedProvider interface {
+	isPublished() bool
+}
+
 type resourceHash struct {
 	value    uint64
 	size     int64
@@ -702,6 +713,11 @@ func InternalResourceSourcePathBestEffort(r resource.Resource) string {
 	return InternalResourceTargetPath(r)
 }
 
+// isPublished returns true if the resource is published.
+func IsPublished(r resource.Resource) bool {
+	return r.(isPublishedProvider).isPublished()
+}
+
 type targetPathProvider interface {
 	// targetPath is the relative path to this resource.
 	// In most cases this will be the same as the RelPermalink(),