Ignore config ServiceLoader files from Gradle sources

devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/EffectiveConfig.java

@@ -5,10 +5,13 @@
 import static java.util.Collections.unmodifiableMap;
 
 import java.io.File;
+import java.io.IOException;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLClassLoader;
 import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -75,7 +78,6 @@ private EffectiveConfig(Builder builder) {
  .withMapping(PackageConfig.class)
  .withMapping(NativeConfig.class)
  .withInterceptors(ConfigCompatibility.FrontEnd.instance(), ConfigCompatibility.BackEnd.instance())
- .setAddDiscoveredSecretKeysHandlers(false)
  .build();
  this.values = generateFullConfigMap(config);
  }
@@ -168,6 +170,17 @@ Builder withProfile(String profile) {
  }
  }
 
+ /**
+ * Builds a specific {@link ClassLoader} for {@link SmallRyeConfig} to include potential configuration files in
+ * the application source paths. The {@link ClassLoader} excludes the path <code>META-INF/services</code> because
+ * in most cases, the ServiceLoader files will reference service implementations that are not yet compiled. It is
+ * possible that the service files reference implementations from dependencies, which are valid and, in this case,
+ * wrongly excluded, but most likely only required for the application and not the Gradle build. We will rewrite
+ * the implementation to cover that case if this becomes an issue.
+ *
+ * @param sourceDirectories a Set of source directories specified by the Gradle build.
+ * @return a {@link ClassLoader} with the source paths
+ */
  private static ClassLoader toUrlClassloader(Set<File> sourceDirectories) {
  List<URL> urls = new ArrayList<>();
  for (File sourceDirectory : sourceDirectories) {
@@ -177,6 +190,23 @@ private static ClassLoader toUrlClassloader(Set<File> sourceDirectories) {
  throw new RuntimeException(e);
  }
  }
- return new URLClassLoader(urls.toArray(new URL[0]));
+
+ return new URLClassLoader(urls.toArray(new URL[0]), Thread.currentThread().getContextClassLoader()) {
+ @Override
+ public URL getResource(String name) {
+ if (name.startsWith("META-INF/services/")) {
+ return null;
+ }
+ return super.getResource(name);
+ }
+
+ @Override
+ public Enumeration<URL> getResources(String name) throws IOException {
+ if (name.startsWith("META-INF/services/")) {
+ return Collections.emptyEnumeration();
+ }
+ return super.getResources(name);
+ }
+ };
  }
 }