Allow WebJar branding overrides from application dependencies

Previously, META-INF/branding/ resources (style.css, logo.png,
favicon.ico) were only resolved from the application's own resources.
When placed in a dependency JAR (e.g. a shared branding library),
style.css was ignored because the Quarkus default branding took
precedence via the classloader fallback.

This change extends getCustomOverride() to also scan application
dependencies for branding resources, with the following priority:
1. Application's own resources (highest)
2. Application dependency JARs
3. Quarkus default branding (lowest)

Fixes #53237

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: phillip-kruger

extensions/vertx-http/deployment/src/main/java/io/quarkus/vertx/http/deployment/webjar/WebJarUtil.java

@@ -11,6 +11,7 @@
 import java.nio.file.attribute.BasicFileAttributes;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collection;
 import java.util.List;
 import java.util.Map;
 import java.util.function.Consumer;
@@ -65,6 +66,7 @@ private static void copyResources(CurateOutcomeBuildItem curateOutcomeBuildItem,
             WebJarBuildItem webJar,
             ResolvedDependency resourcesArtifact, WebJarResourcesTargetVisitor visitor) {
         final ResolvedDependency userApplication = curateOutcomeBuildItem.getApplicationModel().getAppArtifact();
+        final Collection<ResolvedDependency> dependencies = curateOutcomeBuildItem.getApplicationModel().getDependencies();
 
         ClassLoader classLoader = WebJarUtil.class.getClassLoader();
 
@@ -84,7 +86,8 @@ public void accept(PathVisit pathVisit) {
                 try {
                     Files.walkFileTree(pathVisit.getPath(),
                             new ResourcesFileVisitor(visitor, pathVisit.getPath(), resourcesArtifact,
-                                    userApplication, new CombinedWebJarResourcesFilter(filters), classLoader, webJar));
+                                    userApplication, dependencies, new CombinedWebJarResourcesFilter(filters),
+                                    classLoader, webJar));
                 } catch (IOException e) {
                     throw new UncheckedIOException(e);
                 }
@@ -107,21 +110,22 @@ private static String getModuleOverrideName(ResolvedDependency artifact, String
         return artifact.getArtifactId() + type;
     }
 
-    private static InputStream getOverride(ResolvedDependency userApplication, ClassLoader classLoader, String filename,
-            String moduleName,
+    private static InputStream getOverride(ResolvedDependency userApplication, Collection<ResolvedDependency> dependencies,
+            ClassLoader classLoader, String filename, String moduleName,
             boolean useDefaultQuarkusBranding) {
 
-        // First check if the developer supplied the files
-        InputStream overrideStream = getCustomOverride(userApplication, filename, moduleName);
+        // First check if the developer supplied the files (application resources, then dependencies)
+        InputStream overrideStream = getCustomOverride(userApplication, dependencies, filename, moduleName);
         if (overrideStream == null && useDefaultQuarkusBranding) {
             // Else check if Quarkus has a default branding
             overrideStream = getQuarkusOverride(classLoader, filename, moduleName);
         }
         return overrideStream;
     }
 
-    private static InputStream getCustomOverride(ResolvedDependency userApplication, String filename, String moduleName) {
-        // Check if the developer supplied the files
+    private static InputStream getCustomOverride(ResolvedDependency userApplication,
+            Collection<ResolvedDependency> dependencies, String filename, String moduleName) {
+        // First check if the developer supplied the files in the application itself
         byte[] content = readFromPathTree(userApplication.getContentTree(), CUSTOM_MEDIA_FOLDER + moduleName);
         if (content != null) {
             return new ByteArrayInputStream(content);
@@ -132,6 +136,19 @@ private static InputStream getCustomOverride(ResolvedDependency userApplication,
             return new ByteArrayInputStream(content);
         }
 
+        // Then check application dependencies
+        for (ResolvedDependency dep : dependencies) {
+            content = readFromPathTree(dep.getContentTree(), CUSTOM_MEDIA_FOLDER + moduleName);
+            if (content != null) {
+                return new ByteArrayInputStream(content);
+            }
+
+            content = readFromPathTree(dep.getContentTree(), CUSTOM_MEDIA_FOLDER + filename);
+            if (content != null) {
+                return new ByteArrayInputStream(content);
+            }
+        }
+
         return null;
     }
 
@@ -165,17 +182,20 @@ private static class ResourcesFileVisitor extends SimpleFileVisitor<Path> {
         private final Path rootFolderToCopy;
         private final ResolvedDependency resourcesArtifact;
         private final ResolvedDependency userApplication;
+        private final Collection<ResolvedDependency> dependencies;
         private final WebJarResourcesFilter filter;
         private final ClassLoader classLoader;
         private final WebJarBuildItem webJar;
 
         public ResourcesFileVisitor(WebJarResourcesTargetVisitor visitor, Path rootFolderToCopy,
-                ResolvedDependency resourcesArtifact, ResolvedDependency userApplication, WebJarResourcesFilter filter,
+                ResolvedDependency resourcesArtifact, ResolvedDependency userApplication,
+                Collection<ResolvedDependency> dependencies, WebJarResourcesFilter filter,
                 ClassLoader classLoader, WebJarBuildItem webJar) {
             this.visitor = visitor;
             this.rootFolderToCopy = rootFolderToCopy;
             this.resourcesArtifact = resourcesArtifact;
             this.userApplication = userApplication;
+            this.dependencies = dependencies;
             this.filter = filter;
             this.classLoader = classLoader;
             this.webJar = webJar;
@@ -197,7 +217,7 @@ public FileVisitResult visitFile(final Path file,
             boolean overrideFileCreated = false;
             if (OVERRIDABLE_RESOURCES.contains(fileName)) {
                 try (WebJarResourcesFilter.FilterResult filterResult = filter.apply(fileName,
-                        getOverride(userApplication, classLoader,
+                        getOverride(userApplication, dependencies, classLoader,
                                 fileName, moduleName, webJar.getUseDefaultQuarkusBranding()))) {
                     if (filterResult.hasStream()) {
                         overrideFileCreated = true;