Improve compatibility of the model with ZipPath and deserialization

core/processor/src/main/java/io/quarkus/annotation/processor/Outputs.java

@@ -1,29 +1,24 @@
 package io.quarkus.annotation.processor;
 
-import java.nio.file.Path;
-
 /**
- * Define the output here so that they are clearly identified.
+ * Define the outputs here so that they are clearly identified.
  * <p>
- * Paths are resolved from target/classes.
+ * DO NOT use Path as we need maximum compatibility with the filer API and the ZipPath API.
  */
 public final class Outputs {
 
     public static final String META_INF_QUARKUS_BUILD_STEPS = "META-INF/quarkus-build-steps.list";
     public static final String META_INF_QUARKUS_CONFIG_ROOTS = "META-INF/quarkus-config-roots.list";
 
-    public static final String META_INF_QUARKUS_CONFIG = "META-INF/quarkus-config";
-    public static final String META_INF_QUARKUS_CONFIG_JAVADOC = META_INF_QUARKUS_CONFIG + "/quarkus-config-javadoc.json";
-    public static final String META_INF_QUARKUS_CONFIG_MODEL = META_INF_QUARKUS_CONFIG + "/quarkus-config-model.json";
+    private static final String QUARKUS_CONFIG_DOC = "quarkus-config-doc";
+    public static final String QUARKUS_CONFIG_DOC_JAVADOC = QUARKUS_CONFIG_DOC + "/quarkus-config-javadoc.yaml";
+    public static final String QUARKUS_CONFIG_DOC_MODEL = QUARKUS_CONFIG_DOC + "/quarkus-config-model.yaml";
 
-    /**
-     * This directory is specific and written directly into target/ as it's not a file we want to package.
-     * <p>
-     * It is not written by the annotation processor Filer API so we can use proper Paths.
-     */
-    private static final Path QUARKUS_CONFIG_DOC = Path.of("quarkus-config-doc");
-    public static final Path QUARKUS_CONFIG_DOC_JAVADOC = QUARKUS_CONFIG_DOC.resolve("quarkus-config-javadoc.yaml");
-    public static final Path QUARKUS_CONFIG_DOC_MODEL = QUARKUS_CONFIG_DOC.resolve("quarkus-config-model.yaml");
+    public static final String META_INF_QUARKUS_CONFIG = "META-INF/" + QUARKUS_CONFIG_DOC;
+    public static final String META_INF_QUARKUS_CONFIG_JAVADOC_JSON = META_INF_QUARKUS_CONFIG + "/quarkus-config-javadoc.json";
+    public static final String META_INF_QUARKUS_CONFIG_MODEL_JSON = META_INF_QUARKUS_CONFIG + "/quarkus-config-model.json";
+    public static final String META_INF_QUARKUS_CONFIG_JAVADOC_YAML = META_INF_QUARKUS_CONFIG + "/quarkus-config-javadoc.yaml";
+    public static final String META_INF_QUARKUS_CONFIG_MODEL_YAML = META_INF_QUARKUS_CONFIG + "/quarkus-config-model.yaml";
 
     /**
      * Ideally, we should remove this file at some point.

core/processor/src/main/java/io/quarkus/annotation/processor/documentation/config/ConfigDocExtensionProcessor.java

@@ -96,6 +96,5 @@ public void finalizeProcessing() {
                 }
             }
         }
-
     }
 }

core/processor/src/main/java/io/quarkus/annotation/processor/documentation/config/merger/JavadocMerger.java

@@ -1,6 +1,7 @@
 package io.quarkus.annotation.processor.documentation.config.merger;
 
 import java.io.IOException;
+import java.io.InputStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.HashMap;
@@ -26,8 +27,8 @@ public static JavadocRepository mergeJavadocElements(List<Path> buildOutputDirec
                 continue;
             }
 
-            try {
-                JavadocElements javadocElements = JacksonMappers.yamlObjectReader().readValue(javadocPath.toFile(),
+            try (InputStream javadocIs = Files.newInputStream(javadocPath)) {
+                JavadocElements javadocElements = JacksonMappers.yamlObjectReader().readValue(javadocIs,
                         JavadocElements.class);
 
                 if (javadocElements.elements() == null || javadocElements.elements().isEmpty()) {

core/processor/src/main/java/io/quarkus/annotation/processor/documentation/config/merger/MergedModel.java

@@ -38,4 +38,8 @@ public Map<String, ConfigRoot> getConfigRootsInSpecificFile() {
     public Map<Extension, List<ConfigSection>> getGeneratedConfigSections() {
         return generatedConfigSections;
     }
+
+    public boolean isEmpty() {
+        return configRoots.isEmpty();
+    }
 }

core/processor/src/main/java/io/quarkus/annotation/processor/documentation/config/merger/ModelMerger.java

@@ -1,6 +1,7 @@
 package io.quarkus.annotation.processor.documentation.config.merger;
 
 import java.io.IOException;
+import java.io.InputStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.ArrayList;
@@ -44,8 +45,8 @@ public static MergedModel mergeModel(List<Path> buildOutputDirectories) {
                 continue;
             }
 
-            try {
-                ResolvedModel resolvedModel = JacksonMappers.yamlObjectReader().readValue(resolvedModelPath.toFile(),
+            try (InputStream resolvedModelIs = Files.newInputStream(resolvedModelPath)) {
+                ResolvedModel resolvedModel = JacksonMappers.yamlObjectReader().readValue(resolvedModelIs,
                         ResolvedModel.class);
 
                 if (resolvedModel.getConfigRoots() == null || resolvedModel.getConfigRoots().isEmpty()) {

core/processor/src/main/java/io/quarkus/annotation/processor/documentation/config/model/ConfigProperty.java

@@ -36,7 +36,7 @@ public ConfigProperty(ConfigPhase phase, String sourceClass, String sourceName,
             boolean deprecated) {
         super(sourceClass, sourceName, path, type, deprecated);
         this.phase = phase;
-        this.additionalPaths = additionalPaths;
+        this.additionalPaths = additionalPaths != null ? additionalPaths : List.of();
         this.environmentVariable = environmentVariable;
         this.typeDescription = typeDescription;
         this.map = map;

core/processor/src/main/java/io/quarkus/annotation/processor/util/FilerUtil.java

@@ -101,12 +101,33 @@ public void writeJson(String filePath, Object value) {
         }
     }
 
+    /**
+     * This method uses the annotation processor Filer API and we shouldn't use a Path as paths containing \ are not supported.
+     */
+    public void writeYaml(String filePath, Object value) {
+        if (value == null) {
+            return;
+        }
+
+        try {
+            final FileObject yamlResource = processingEnv.getFiler().createResource(StandardLocation.CLASS_OUTPUT, "",
+                    filePath.toString());
+
+            try (OutputStream os = yamlResource.openOutputStream()) {
+                JacksonMappers.yamlObjectWriter().writeValue(os, value);
+            }
+        } catch (IOException e) {
+            processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Failed to write " + filePath + ": " + e);
+            return;
+        }
+    }
+
     /**
      * The model files are written outside of target/classes as we don't want to include them in the jar.
      * <p>
      * They are not written by the annotation processor Filer API so we can use proper Paths.
      */
-    public Path writeModel(Path filePath, Object value) {
+    public Path writeModel(String filePath, Object value) {
         Path yamlModelPath = getTargetPath().resolve(filePath);
         try {
             Files.createDirectories(yamlModelPath.getParent());