structure output in Initializing phase of builder

Author: wirthi

docs/reference-manual/native-image/BuildOutput.md

@@ -23,11 +23,17 @@ Below is the example output when building a native executable of the `HelloWorld
 ================================================================================
 GraalVM Native Image: Generating 'helloworld' (executable)...
 ================================================================================
-[1/8] Initializing...                                            (2.0s @ 0.19GB)
- Java version: 26+9, vendor version: GraalVM CE 26-dev+9.1
- Graal compiler: optimization level: 2, target machine: x86-64-v3
- C compiler: gcc (linux, x86_64, 15.2.1)
- Garbage collector: Serial GC (max heap size: 80% of RAM)
+[1/8] Initializing...                                                                                    (5.1s @ 0.23GB)
+ Builder configuration:
+ - Java version: 26+12, vendor version: Oracle GraalVM 26-dev+12.1
+ - Graal compiler: optimization level: 2, target machine: x86-64-v3
+ - C compiler: gcc (linux, x86_64, 13.3.0)
+ - Assertions: enabled, system assertions: enabled
+ - 1 user-specific feature(s):
+   - com.oracle.svm.thirdparty.gson.GsonFeature
+ Image configuration:
+ - Garbage collector: Serial GC (max heap size: 80% of RAM)
+ - Assertions: disabled (class-specific config may apply), system assertions: disabled
 --------------------------------------------------------------------------------
 Build resources:
  - 14.69GiB of memory (47.0% of system memory, using all available memory)

substratevm/src/com.oracle.svm.hosted/src/com/oracle/svm/hosted/ProgressReporter.java

@@ -243,30 +243,39 @@ public void printInitializeEnd(List<Feature> features, ImageClassLoader classLoa
         recordJsonMetric(GeneralInfo.JAVA_VERSION, vm.version);
         recordJsonMetric(GeneralInfo.VENDOR_VERSION, vm.vendorVersion);
         recordJsonMetric(GeneralInfo.GRAALVM_VERSION, vm.vendorVersion); // deprecated
-        l().a(" ").doclink("Java version", "#glossary-java-info").a(": ").a(vm.version).a(", ").doclink("vendor version", "#glossary-java-info").a(": ").a(vm.vendorVersion).println();
+
+        // Builder Configuration section
+        l().a(" ").a("Builder configuration:").println();
+        l().a(" - ").doclink("Java version", "#glossary-java-info").a(": ").a(vm.version).a(", ").doclink("vendor version", "#glossary-java-info").a(": ").a(vm.vendorVersion).println();
         String optimizationLevel = SubstrateOptions.Optimize.getValue();
         recordJsonMetric(GeneralInfo.GRAAL_COMPILER_OPTIMIZATION_LEVEL, optimizationLevel);
         String march = CPUType.getSelectedOrDefaultMArch();
         recordJsonMetric(GeneralInfo.GRAAL_COMPILER_MARCH, march);
-        DirectPrinter graalLine = l().a(" ").doclink("Graal compiler", "#glossary-graal-compiler").a(": optimization level: %s, target machine: %s", optimizationLevel, march);
+        DirectPrinter graalLine = l().a(" - ").doclink("Graal compiler", "#glossary-graal-compiler").a(": optimization level: %s, target machine: %s", optimizationLevel, march);
         ImageSingletons.lookup(ProgressReporterFeature.class).appendGraalSuffix(graalLine);
         graalLine.println();
         String cCompilerShort = null;
         if (ImageSingletons.contains(CCompilerInvoker.class)) {
             cCompilerShort = ImageSingletons.lookup(CCompilerInvoker.class).compilerInfo.getShortDescription();
-            l().a(" ").doclink("C compiler", "#glossary-ccompiler").a(": ").a(cCompilerShort).println();
+            l().a(" - ").doclink("C compiler", "#glossary-ccompiler").a(": ").a(cCompilerShort).println();
         }
         recordJsonMetric(GeneralInfo.CC, cCompilerShort);
         String gcName = Heap.getHeap().getGC().getName();
         recordJsonMetric(GeneralInfo.GC, gcName);
         long maxHeapSize = SubstrateGCOptions.MaxHeapSize.getValue();
         String maxHeapValue = maxHeapSize == 0 ? Heap.getHeap().getGC().getDefaultMaxHeapSize() : ByteFormattingUtil.bytesToHuman(maxHeapSize);
 
-        l().a(" ").a("Builder assertions: ").a(SubstrateUtil.assertionsEnabled() ? "enabled" : "disabled").a(", builder system assertions: ").a(getSystemAssertionStatus() ? "enabled" : "disabled").println();
-        l().a(" ").doclink("Image Garbage collector", "#glossary-gc").a(": ").a(gcName).a(" (").doclink("max heap size", "#glossary-gc-max-heap-size").a(": ").a(maxHeapValue).a(")").println();
-        l().a(" ").a("Image assertions: by default ").a(RuntimeAssertionsSupport.singleton().getDefaultAssertionStatus() ? "enabled" : "disabled").a(", system assertions: by default ").a(RuntimeAssertionsSupport.singleton().getDefaultSystemAssertionStatus() ? "enabled" : "disabled").a(" (class-specific config may apply)").println();
+        l().a(" - ").a("Assertions: ").a(SubstrateUtil.assertionsEnabled() ? "enabled" : "disabled").a(", system assertions: ").a(getSystemAssertionStatus() ? "enabled" : "disabled")
+                        .println();
 
         printFeatures(features);
+
+        // Image Configuration section
+        l().a(" ").a("Image configuration:").println();
+        l().a(" - ").doclink("Garbage collector", "#glossary-gc").a(": ").a(gcName).a(" (").doclink("max heap size", "#glossary-gc-max-heap-size").a(": ").a(maxHeapValue).a(")").println();
+        l().a(" - ").a("Assertions: ").a(RuntimeAssertionsSupport.singleton().getDefaultAssertionStatus() ? "enabled" : "disabled").a(" (class-specific config may apply), system assertions: ")
+                        .a(RuntimeAssertionsSupport.singleton().getDefaultSystemAssertionStatus() ? "enabled" : "disabled").println();
+
         printExperimentalOptions(classLoader);
         printResourceInfo();
     }
@@ -278,7 +287,7 @@ private boolean getSystemAssertionStatus() {
     private void printFeatures(List<Feature> features) {
         int numFeatures = features.size();
         if (numFeatures > 0) {
-            l().a(" ").a(numFeatures).a(" ").doclink("user-specific feature(s)", "#glossary-user-specific-features").a(":").println();
+            l().a(" - ").a(numFeatures).a(" ").doclink("user-specific feature(s)", "#glossary-user-specific-features").a(":").println();
             features.sort(Comparator.comparing(a -> a.getClass().getName()));
             for (Feature feature : features) {
                 printFeature(l(), feature);
@@ -287,7 +296,7 @@ private void printFeatures(List<Feature> features) {
     }
 
     private static void printFeature(DirectPrinter printer, Feature feature) {
-        printer.a(" - ");
+        printer.a("   - ");
         String name = feature.getClass().getName();
         String url = feature.getURL();
         if (url != null) {