feat: introduce build item to control kubernetes generated output

directory

extensions/kubernetes/spi/src/main/java/io/quarkus/kubernetes/spi/CustomKubernetesOutputDirBuildItem.java

@@ -0,0 +1,23 @@
+package io.quarkus.kubernetes.spi;
+
+import java.nio.file.Path;
+
+import io.quarkus.builder.item.SimpleBuildItem;
+
+/**
+ * Build item that allows us to supply a custom output dir instead of defaulting to {project.target.dir}/kubernetes
+ * It's different from the {@link KubernetesOutputDirBuildItem} as it's used to communicate the intention to override the dir
+ * while {@link KubernetesOutputDirBuildItem} is used to communicate the effective output dir.
+ */
+public final class CustomKubernetesOutputDirBuildItem extends SimpleBuildItem {
+
+    private final Path outputDir;
+
+    public CustomKubernetesOutputDirBuildItem(Path outputDir) {
+        this.outputDir = outputDir;
+    }
+
+    public Path getOutputDir() {
+        return outputDir;
+    }
+}

extensions/kubernetes/vanilla/deployment/src/main/java/io/quarkus/kubernetes/deployment/KubernetesProcessor.java

@@ -51,6 +51,7 @@
 import io.quarkus.deployment.util.FileUtil;
 import io.quarkus.kubernetes.spi.ConfigurationSupplierBuildItem;
 import io.quarkus.kubernetes.spi.ConfiguratorBuildItem;
+import io.quarkus.kubernetes.spi.CustomKubernetesOutputDirBuildItem;
 import io.quarkus.kubernetes.spi.CustomProjectRootBuildItem;
 import io.quarkus.kubernetes.spi.DecoratorBuildItem;
 import io.quarkus.kubernetes.spi.DekorateOutputBuildItem;
@@ -115,6 +116,7 @@ public void build(ApplicationInfoBuildItem applicationInfo,
             List<DecoratorBuildItem> decorators,
             BuildProducer<DekorateOutputBuildItem> dekorateSessionProducer,
             Optional<CustomProjectRootBuildItem> customProjectRoot,
+            Optional<CustomKubernetesOutputDirBuildItem> customOutputDir,
             BuildProducer<GeneratedFileSystemResourceBuildItem> generatedResourceProducer,
             BuildProducer<GeneratedKubernetesResourceBuildItem> generatedKubernetesResourceProducer,
             BuildProducer<KubernetesOutputDirectoryBuildItem> outputDirectoryBuildItemBuildProducer) {
@@ -187,8 +189,13 @@ public void build(ApplicationInfoBuildItem applicationInfo,
                     }
                 });
 
-                Path targetDirectory = getEffectiveOutputDirectory(kubernetesConfig, project.getRoot(),
-                        outputTarget.getOutputDirectory());
+                //The targetDirectory should be the custom if provided, oterwise the 'default' output directory.
+                //I this case 'default' means that one that we used until now (up until we introduced the ability to override).
+                Path targetDirectory = customOutputDir
+                        .map(c -> c.getOutputDir())
+                        .map(d -> d.isAbsolute() ? d : project.getRoot().resolve(d))
+                        .orElseGet(() -> getEffectiveOutputDirectory(kubernetesConfig, project.getRoot(),
+                                outputTarget.getOutputDirectory()));
 
                 outputDirectoryBuildItemBuildProducer.produce(new KubernetesOutputDirectoryBuildItem(targetDirectory));
 

integration-tests/kubernetes/quarkus-standard-way/src/test/java/io/quarkus/it/kubernetes/KubernetesWithCustomOutputDirTest.java

@@ -0,0 +1,72 @@
+package io.quarkus.it.kubernetes;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.fabric8.kubernetes.api.model.HasMetadata;
+import io.fabric8.kubernetes.api.model.apps.Deployment;
+import io.quarkus.builder.BuildContext;
+import io.quarkus.kubernetes.spi.CustomKubernetesOutputDirBuildItem;
+import io.quarkus.kubernetes.spi.CustomProjectRootBuildItem;
+import io.quarkus.test.ProdBuildResults;
+import io.quarkus.test.ProdModeTestBuildStep;
+import io.quarkus.test.ProdModeTestResults;
+import io.quarkus.test.QuarkusProdModeTest;
+
+public class KubernetesWithCustomOutputDirTest {
+
+    private static final String APP_NAME = "kubernetes-with-custom-output-dir";
+    @RegisterExtension
+    static final QuarkusProdModeTest config = new QuarkusProdModeTest()
+            .withApplicationRoot((jar) -> jar.addClasses(GreetingResource.class))
+            .setApplicationName(APP_NAME)
+            .setApplicationVersion("0.1-SNAPSHOT")
+            .addBuildChainCustomizerEntries(
+                    new QuarkusProdModeTest.BuildChainCustomizerEntry(CustomProjectRootBuildItemProducerProdMode.class,
+                            List.of(CustomProjectRootBuildItem.class, CustomKubernetesOutputDirBuildItem.class),
+                            Collections.emptyList()));
+
+    @ProdBuildResults
+    private ProdModeTestResults prodModeTestResults;
+
+    @Test
+    public void assertGeneratedResources() throws IOException {
+        final Path kubernetesDir = prodModeTestResults.getBuildDir().getParent().resolve("custom-sources")
+                .resolve(".kubernetes");
+        assertThat(kubernetesDir)
+                .isDirectoryContaining(p -> p.getFileName().endsWith("kubernetes.json"))
+                .isDirectoryContaining(p -> p.getFileName().endsWith("kubernetes.yml"))
+                .satisfies(p -> assertThat(p.toFile().listFiles()).hasSize(2));
+        List<HasMetadata> kubernetesList = DeserializationUtil.deserializeAsList(kubernetesDir.resolve("kubernetes.yml"));
+        assertThat(kubernetesList).filteredOn(h -> h.getMetadata().getName().equals(APP_NAME))
+                .filteredOn(e -> e instanceof Deployment).singleElement().satisfies(d -> {
+                    assertThat(d.getMetadata()).satisfies(m -> {
+                        assertThat(m.getName()).isEqualTo(APP_NAME);
+                    });
+                });
+    }
+
+    public static class CustomProjectRootBuildItemProducerProdMode extends ProdModeTestBuildStep {
+
+        public CustomProjectRootBuildItemProducerProdMode(Map<String, Object> testContext) {
+            super(testContext);
+        }
+
+        @Override
+        public void execute(BuildContext context) {
+            context.produce(new CustomProjectRootBuildItem(
+                    (Path) getTestContext().get(QuarkusProdModeTest.BUILD_CONTEXT_CUSTOM_SOURCES_PATH_KEY)));
+            context.produce(new CustomKubernetesOutputDirBuildItem(
+                    ((Path) getTestContext().get(QuarkusProdModeTest.BUILD_CONTEXT_CUSTOM_SOURCES_PATH_KEY))
+                            .resolve(".kubernetes")));
+        }
+    }
+}