Fix one more resource change eviction logic issue

This is how we should have fixed #1239.

Fixes #12456

3 files changed, 67 insertions, 46 deletions

diff --git a/hugolib/hugo_sites_build.go b/hugolib/hugo_sites_build.go
index c96629cd6..6a9afee99 100644
--- a/hugolib/hugo_sites_build.go
+++ b/hugolib/hugo_sites_build.go
@@ -23,11 +23,9 @@ import (
 	"path"
 	"path/filepath"
 	"strings"
-	"sync"
 	"time"
 
 	"github.com/bep/logg"
-	"github.com/gohugoio/hugo/cache/dynacache"
 	"github.com/gohugoio/hugo/deps"
 	"github.com/gohugoio/hugo/hugofs"
 	"github.com/gohugoio/hugo/hugofs/files"
@@ -47,7 +45,6 @@ import (
 	"github.com/gohugoio/hugo/resources/page"
 	"github.com/gohugoio/hugo/resources/page/siteidentities"
 	"github.com/gohugoio/hugo/resources/postpub"
-	"github.com/gohugoio/hugo/resources/resource"
 
 	"github.com/spf13/afero"
 
@@ -764,48 +761,8 @@ func (h *HugoSites) processPartial(ctx context.Context, l logg.LevelLogger, conf
 				}
 			}
 		case files.ComponentFolderAssets:
-			p := pathInfo.Path()
-			logger.Println("Asset changed", p)
-
-			var matches []any
-			var mu sync.Mutex
-
-			h.MemCache.ClearMatching(
-				func(k string, pm dynacache.PartitionManager) bool {
-					// Avoid going through everything.
-					return strings.HasPrefix(k, "/res")
-				},
-				func(k, v any) bool {
-					if strings.Contains(k.(string), p) {
-						mu.Lock()
-						defer mu.Unlock()
-						switch vv := v.(type) {
-						case resource.Resources:
-							// GetMatch/Match.
-							for _, r := range vv {
-								matches = append(matches, r)
-							}
-							return true
-						default:
-							matches = append(matches, vv)
-							return true
-
-						}
-					}
-					return false
-				})
-
-			var hasID bool
-			for _, r := range matches {
-				identity.WalkIdentitiesShallow(r, func(level int, rid identity.Identity) bool {
-					hasID = true
-					changes = append(changes, rid)
-					return false
-				})
-			}
-			if !hasID {
-				changes = append(changes, pathInfo)
-			}
+			logger.Println("Asset changed", pathInfo.Path())
+			changes = append(changes, pathInfo)
 		case files.ComponentFolderData:
 			logger.Println("Data changed", pathInfo.Path())
 
diff --git a/resources/resource_transformers/tocss/scss/scss_integration_test.go b/resources/resource_transformers/tocss/scss/scss_integration_test.go
index 02e2b9200..469463872 100644
--- a/resources/resource_transformers/tocss/scss/scss_integration_test.go
+++ b/resources/resource_transformers/tocss/scss/scss_integration_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -328,6 +328,7 @@ Styles: {{ $r.RelPermalink }}
 	b.AssertFileContent("public/index.html", "Styles: /scss/main.css")
 }
 
+// Issue #1239.
 func TestRebuildAssetGetMatch(t *testing.T) {
 	t.Parallel()
 	if !scss.Supports() {
@@ -358,3 +359,61 @@ T1: {{ $r.Content }}
 
 	b.AssertFileContent("public/index.html", `color: blue`)
 }
+
+func TestRebuildAssetMatchIssue12456(t *testing.T) {
+	t.Parallel()
+	if !scss.Supports() {
+		t.Skip()
+	}
+
+	files := `
+-- hugo.toml --
+disableKinds = ["term", "taxonomy", "section", "page"]
+disableLiveReload = true
+-- assets/a.scss --
+h1 {
+	color: red;
+}
+-- assets/dir/b.scss --
+h2 {
+	color: blue;
+}
+-- assets/dir/c.scss --
+h3 {
+	color: green;
+}
+-- layouts/index.html --
+{{ $a := slice (resources.Get "a.scss") }}
+{{ $b := resources.Match "dir/*.scss" }}
+
+{{/* Add styles in a specific order. */}}
+{{ $styles := slice $a $b }}
+
+{{ $stylesheets := slice }}
+  {{ range $styles }}
+  {{ $stylesheets = $stylesheets | collections.Append . }}
+{{ end }}
+
+
+{{ range $stylesheets }}
+  {{ with . | resources.ToCSS | fingerprint }}
+    <link as="style"  href="{{ .RelPermalink }}" rel="preload stylesheet">
+  {{ end }}
+{{ end }}
+	`
+
+	b := hugolib.NewIntegrationTestBuilder(
+		hugolib.IntegrationTestConfig{
+			T:           t,
+			TxtarString: files,
+			NeedsOsFS:   true,
+			Running:     true,
+			// LogLevel:    logg.LevelTrace,
+		}).Build()
+
+	b.AssertFileContent("public/index.html", `b.60a9f3bdc189ee8a857afd5b7e1b93ad1644de0873761a7c9bc84f781a821942.css`)
+
+	b.EditFiles("assets/dir/b.scss", `h2 { color: orange; }`).Build()
+
+	b.AssertFileContent("public/index.html", `b.46b2d77c7ffe37ee191678f72df991ecb1319f849957151654362f09b0ef467f.css`)
+}
diff --git a/resources/transform.go b/resources/transform.go
index b498924f5..9adec38cc 100644
--- a/resources/transform.go
+++ b/resources/transform.go
@@ -49,6 +49,7 @@ var (
 	_ resource.ReadSeekCloserResource    = (*resourceAdapter)(nil)
 	_ resource.Resource                  = (*resourceAdapter)(nil)
 	_ resource.Staler                    = (*resourceAdapterInner)(nil)
+	_ identity.IdentityGroupProvider     = (*resourceAdapterInner)(nil)
 	_ resource.Source                    = (*resourceAdapter)(nil)
 	_ resource.Identifier                = (*resourceAdapter)(nil)
 	_ resource.ResourceNameTitleProvider = (*resourceAdapter)(nil)
@@ -657,6 +658,10 @@ type resourceAdapterInner struct {
 	*publishOnce
 }
 
+func (r *resourceAdapterInner) GetIdentityGroup() identity.Identity {
+	return r.target.GetIdentityGroup()
+}
+
 func (r *resourceAdapterInner) StaleVersion() uint32 {
 	// Both of these are incremented on change.
 	return r.Staler.StaleVersion() + r.target.StaleVersion()