WIP: Make QuarkusBuild not pollute Gradle's build cache

Currently the `QuarkusBuild` task implementation adds even large build artifacts and unmodified dependency jars to Gradle's build cache. This pollutes the Gradle build cache quite a lot and therefore lets archived build caches become unnecessary huge.

This change updates the build logic to fix this behavior by not adding dependencies and large build artifacts, like uber-jar and native binary, to the Gradle build cache.

The `QuarkusBuild` task has been split into three tasks:
1. a new `QuarkusBuildDependencies` task that only collects the contents for `build/quarkus-app/lib`
2. a new `QuarkusBuildApp` task that to collect everything else from a Quarkus build (everything except the `build/quarkus-app/lib`)
3. the `QuarkusBuild` task now combines the outputs of the above two tasks

`QuarkusBuildDependencies` (named 'quarkusDependenciesBuild`) is not cacheable, because it only collects dependencies, which come either from a repository (and are already available locally elsewhere) or are built by other Gradle tasks. This task is only executed if the configured Quarkus package type requires the "quarkus-app" directory (`fast-jar` + `native`). It's "build working directory" is `build/quarkus-build/dep`.

`QuarkusBuildApp` (named `quarkusAppBuild`) collects the contents of the "quarkus-app" directory _excluding_ the `lib/` directory are cacheable, which is the default for CI environments. Non-CI environments still cache all outputs, even uber-jars and native binaries to retain the existing behavior for developers and keep build turn-around times low. CI environments can opt-in to add even huge artifacts to Gradle's build cache by explicitly setting the `cacheUberAndNativeRunners` property in the Quarkus extension to `true`. It's "build working directory" is `build/quarkus-build/app`.

Since `QuarkusBuild` only combines the outputs of the above two tasks, the same "CI vs local" caching behavior as for the `QuarkusBuildApp` task applies. To make "up to date" checks (kind of) more reliable, all outputs are removed first. This means, that for example an existing uber-jar in `build/` will disappear, when the build's package type is "fast-jar". This behavior can be disabled by setting the `cleanupBuildOutput` property on the Quarkus extension to `false`.

Both `QuarkusBuildDependencies` and `QuarkusBuildApp` can trigger an actual Quarkus application build. That Quarkus app build will only be triggered when needed and only once per Gradle build.

The task names `quarkusDependenciesBuild` and `quarkusAppBuild` are intentionally "that way around". Letting the names of these tasks begin with `quarkusBuild...` could confuse users, who use abbreviated task names on the command line (for example `./gradlew qB` is automagically expanded to `./gradlew quarkusBuild`, which would become ambiguous with `quarkusBuildDependencies` and `quarkusBuildApp`).

Unless the `cacheLargeArtifacts` property on the `quarkus` extension is set to `true`, the output of/for the package type `fast-jar` minus the dependency jars is cached by Gradle's build cache (similar for `legacy-jar`).

Basically everything is cacheable to allow fast(er) local development turn-around cycles.

To be able to investigate which configuration settings were effectively used, there's another new task called `quarkusShowEffectiveConfig` that shows all the `quarkus.*` properties and some more information, including the loaded `application.(properties|yaml|yml)`. This task is intended to debug build issues. The task can optionally save the effecitve config properties as a properties file in the `build/` directory, if run with the command line option `./gradlew quarkusShowEffectiveConfig --save-config-properties`.

Relates to: #30852

devtools/gradle/build.gradle

@@ -48,6 +48,7 @@ subprojects {
 
     javadoc {
         options.addStringOption('encoding', 'UTF-8')
+        options.addStringOption("Xdoclint:-reference", "-quiet")
     }
 }
 

devtools/gradle/gradle-application-plugin/build.gradle

@@ -7,6 +7,7 @@ dependencies {
     implementation "io.quarkus:quarkus-devtools-common:${version}"
     implementation "io.quarkus:quarkus-core-deployment:${version}"
     implementation "io.quarkus:quarkus-bootstrap-gradle-resolver:${version}"
+    implementation "io.smallrye.config:smallrye-config-source-yaml:${smallrye_config_version}"
 
     implementation project(":gradle-model")
 

devtools/gradle/gradle-application-plugin/pom.xml

@@ -54,6 +54,10 @@
             <artifactId>quarkus-devmode-test-utils</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>io.smallrye.config</groupId>
+            <artifactId>smallrye-config-source-yaml</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.jetbrains.kotlin</groupId>
             <artifactId>kotlin-gradle-plugin</artifactId>

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

@@ -36,7 +36,9 @@
 import io.quarkus.gradle.tasks.ImagePush;
 import io.quarkus.gradle.tasks.QuarkusAddExtension;
 import io.quarkus.gradle.tasks.QuarkusBuild;
+import io.quarkus.gradle.tasks.QuarkusBuildApp;
 import io.quarkus.gradle.tasks.QuarkusBuildConfiguration;
+import io.quarkus.gradle.tasks.QuarkusBuildDependencies;
 import io.quarkus.gradle.tasks.QuarkusDev;
 import io.quarkus.gradle.tasks.QuarkusGenerateCode;
 import io.quarkus.gradle.tasks.QuarkusGoOffline;
@@ -46,6 +48,7 @@
 import io.quarkus.gradle.tasks.QuarkusListPlatforms;
 import io.quarkus.gradle.tasks.QuarkusRemoteDev;
 import io.quarkus.gradle.tasks.QuarkusRemoveExtension;
+import io.quarkus.gradle.tasks.QuarkusShowEffectiveConfig;
 import io.quarkus.gradle.tasks.QuarkusTest;
 import io.quarkus.gradle.tasks.QuarkusTestConfig;
 import io.quarkus.gradle.tasks.QuarkusUpdate;
@@ -55,7 +58,17 @@
 public class QuarkusPlugin implements Plugin<Project> {
 
     public static final String ID = "io.quarkus";
+    public static final String QUARKUS_PROFILE = "quarkus.profile";
+    public static final String DEFAULT_PROFILE = "prod";
+    public static final String QUARKUS_PACKAGE_OUTPUT_NAME = "quarkus.package.output-name";
+    public static final String QUARKUS_PACKAGE_ADD_RUNNER_SUFFIX = "quarkus.package.add-runner-suffix";
     public static final String QUARKUS_PACKAGE_TYPE = "quarkus.package.type";
+    public static final String DEFAULT_PACKAGE_TYPE = "jar";
+    public static final String OUTPUT_DIRECTORY = "quarkus.package.output-directory";
+    public static final String DEFAULT_OUTPUT_DIRECTORY = "quarkus-app";
+    public static final String CLASS_LOADING_REMOVED_ARTIFACTS = "quarkus.class-loading.removed-artifacts";
+    public static final String CLASS_LOADING_PARENT_FIRST_ARTIFACTS = "quarkus.class-loading.parent-first-artifacts";
+    public static final String QUARKUS_ARTIFACT_PROPERTIES = "quarkus-artifact.properties";
 
     public static final String EXTENSION_NAME = "quarkus";
     public static final String LIST_EXTENSIONS_TASK_NAME = "listExtensions";
@@ -66,6 +79,9 @@ public class QuarkusPlugin implements Plugin<Project> {
     public static final String QUARKUS_GENERATE_CODE_TASK_NAME = "quarkusGenerateCode";
     public static final String QUARKUS_GENERATE_CODE_DEV_TASK_NAME = "quarkusGenerateCodeDev";
     public static final String QUARKUS_GENERATE_CODE_TESTS_TASK_NAME = "quarkusGenerateCodeTests";
+    public static final String QUARKUS_BUILD_DEP_TASK_NAME = "quarkusDependenciesBuild";
+    public static final String QUARKUS_BUILD_APP_TASK_NAME = "quarkusAppBuild";
+    public static final String QUARKUS_SHOW_EFFECTIVE_CONFIG_TASK_NAME = "quarkusShowEffectiveConfig";
     public static final String QUARKUS_BUILD_TASK_NAME = "quarkusBuild";
     public static final String QUARKUS_DEV_TASK_NAME = "quarkusDev";
     public static final String QUARKUS_REMOTE_DEV_TASK_NAME = "quarkusRemoteDev";
@@ -96,6 +112,7 @@ public class QuarkusPlugin implements Plugin<Project> {
 
     private final ToolingModelBuilderRegistry registry;
 
+    @SuppressWarnings("CdiInjectionPointsInspection")
     @Inject
     public QuarkusPlugin(ToolingModelBuilderRegistry registry) {
         this.registry = registry;
@@ -148,11 +165,38 @@ private void registerTasks(Project project, QuarkusPluginExtension quarkusExt) {
         TaskProvider<QuarkusGenerateCode> quarkusGenerateCodeTests = tasks.register(QUARKUS_GENERATE_CODE_TESTS_TASK_NAME,
                 QuarkusGenerateCode.class, task -> task.setTest(true));
 
-        QuarkusBuildConfiguration buildConfig = new QuarkusBuildConfiguration(project);
+        QuarkusBuildConfiguration buildConfig = new QuarkusBuildConfiguration(project, quarkusExt);
 
-        TaskProvider<QuarkusBuild> quarkusBuild = tasks.register(QUARKUS_BUILD_TASK_NAME, QuarkusBuild.class, build -> {
-            build.dependsOn(quarkusGenerateCode);
-            build.getForcedProperties().set(buildConfig.getForcedProperties());
+        TaskProvider<QuarkusBuildDependencies> quarkusBuildDep = tasks.register(QUARKUS_BUILD_DEP_TASK_NAME,
+                QuarkusBuildDependencies.class, buildConfig);
+        quarkusBuildDep.configure(task -> {
+            task.getOutputs().doNotCacheIf("Dependencies are never cached", t -> true);
+        });
+
+        TaskProvider<QuarkusShowEffectiveConfig> quarkusShowConfig = tasks.register(QUARKUS_SHOW_EFFECTIVE_CONFIG_TASK_NAME,
+                QuarkusShowEffectiveConfig.class, buildConfig);
+        quarkusShowConfig.configure(task -> {
+            task.setDescription("Show effective Quarkus build configuration.");
+        });
+
+        TaskProvider<QuarkusBuildApp> quarkusBuildApp = tasks.register(QUARKUS_BUILD_APP_TASK_NAME,
+                QuarkusBuildApp.class, buildConfig);
+        quarkusBuildApp.configure(task -> {
+            task.dependsOn(quarkusGenerateCode);
+            task.getOutputs().doNotCacheIf(
+                    "Not adding uber-jars, native binaries and mutable-jar package type to Gradle " +
+                            "build cache by default. To allow caching of uber-jars, native binaries and mutable-jar " +
+                            "package type, set 'cacheUberAndNativeRunners' in the 'quarkus' Gradle extension to 'true'.",
+                    t -> !task.isCachedByDefault() && !quarkusExt.getCacheLargeArtifacts().get());
+        });
+
+        TaskProvider<QuarkusBuild> quarkusBuild = tasks.register(QUARKUS_BUILD_TASK_NAME, QuarkusBuild.class, buildConfig);
+        quarkusBuild.configure(build -> {
+            build.dependsOn(quarkusBuildDep, quarkusBuildApp);
+            build.getOutputs().doNotCacheIf(
+                    "Collects and combines the outputs of " + QUARKUS_BUILD_APP_TASK_NAME + " and "
+                            + QUARKUS_BUILD_DEP_TASK_NAME,
+                    t -> !quarkusExt.getCacheLargeArtifacts().get());
         });
 
         TaskProvider<ImageBuild> imageBuild = tasks.register(IMAGE_BUILD_TASK_NAME, ImageBuild.class, buildConfig);
@@ -242,7 +286,7 @@ private void registerTasks(Project project, QuarkusPluginExtension quarkusExt) {
                                 quarkusGenerateCode,
                                 quarkusGenerateCodeTests);
                     });
-                    quarkusBuild.configure(
+                    quarkusBuildApp.configure(
                             task -> task.dependsOn(classesTask, resourcesTask, tasks.named(JavaPlugin.JAR_TASK_NAME)));
 
                     SourceSetContainer sourceSets = project.getExtensions().getByType(SourceSetContainer.class);
@@ -310,7 +354,7 @@ public void execute(Task task) {
                         t.useJUnitPlatform();
                     });
                     // quarkusBuild is expected to run after the project has passed the tests
-                    quarkusBuild.configure(task -> task.shouldRunAfter(tasks.withType(Test.class)));
+                    quarkusBuildApp.configure(task -> task.shouldRunAfter(tasks.withType(Test.class)));
 
                     SourceSet generatedSourceSet = sourceSets.create(QuarkusGenerateCode.QUARKUS_GENERATED_SOURCES);
                     SourceSet generatedTestSourceSet = sourceSets.create(QuarkusGenerateCode.QUARKUS_TEST_GENERATED_SOURCES);

devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/extension/QuarkusPluginExtension.java

@@ -1,12 +1,15 @@
 package io.quarkus.gradle.extension;
 
+import static io.quarkus.gradle.QuarkusPlugin.QUARKUS_PACKAGE_ADD_RUNNER_SUFFIX;
+import static io.quarkus.gradle.QuarkusPlugin.QUARKUS_PACKAGE_OUTPUT_NAME;
+
 import java.io.File;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.LinkedHashSet;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Objects;
-import java.util.Properties;
 import java.util.Set;
 import java.util.StringJoiner;
 import java.util.stream.Collectors;
@@ -42,12 +45,20 @@ public class QuarkusPluginExtension {
     private final MapProperty<String, String> quarkusBuildProperties;
     private final SourceSetExtension sourceSetExtension;
 
+    private final Property<Boolean> cacheLargeArtifacts;
+    private final Property<Boolean> cleanupBuildOutput;
+
     public QuarkusPluginExtension(Project project) {
         this.project = project;
 
         finalName = project.getObjects().property(String.class);
         finalName.convention(project.provider(() -> String.format("%s-%s", project.getName(), project.getVersion())));
 
+        this.cleanupBuildOutput = project.getObjects().property(Boolean.class)
+                .convention(true);
+        this.cacheLargeArtifacts = project.getObjects().property(Boolean.class)
+                .convention(!System.getenv().containsKey("CI"));
+
         this.sourceSetExtension = new SourceSetExtension();
         this.quarkusBuildProperties = project.getObjects().mapProperty(String.class, String.class);
     }
@@ -96,34 +107,66 @@ public void beforeTest(Test task) {
         }
     }
 
-    public String buildNativeRunnerName(final Map<String, Object> taskSystemProps) {
-        Properties properties = new Properties(taskSystemProps.size());
-        properties.putAll(taskSystemProps);
-        quarkusBuildProperties.get().entrySet()
-                .forEach(buildEntry -> properties.putIfAbsent(buildEntry.getKey(), buildEntry.getValue()));
-        System.getProperties().entrySet()
-                .forEach(propEntry -> properties.putIfAbsent(propEntry.getKey(), propEntry.getValue()));
-        System.getenv().entrySet().forEach(
-                envEntry -> properties.putIfAbsent(envEntry.getKey(), envEntry.getValue()));
-        StringBuilder nativeRunnerName = new StringBuilder();
-
-        if (properties.containsKey("quarkus.package.output-name")) {
-            nativeRunnerName.append(properties.get("quarkus.package.output-name"));
-        } else {
-            nativeRunnerName.append(finalName());
+    public String resolveBuildProperty(String propertyKey, Map<String, Object> taskSystemProps, String defaultValue) {
+        Object v = taskSystemProps.get(propertyKey);
+        if (v instanceof String) {
+            return v.toString();
         }
-        if (!properties.containsKey("quarkus.package.add-runner-suffix")
-                || (properties.containsKey("quarkus.package.add-runner-suffix")
-                        && Boolean.parseBoolean((String) properties.get("quarkus.package.add-runner-suffix")))) {
-            nativeRunnerName.append("-runner");
+        String s = quarkusBuildProperties.get().get(propertyKey);
+        if (s != null) {
+            return s;
         }
-        return nativeRunnerName.toString();
+        s = System.getProperty(propertyKey);
+        if (s != null) {
+            return s;
+        }
+        s = System.getenv(propertyKey.toUpperCase(Locale.ROOT).replace('.', '_'));
+        if (s != null) {
+            return s;
+        }
+        return defaultValue;
+    }
+
+    public String buildNativeRunnerBaseName(Map<String, Object> taskSystemProps) {
+        return resolveBuildProperty(QUARKUS_PACKAGE_OUTPUT_NAME, taskSystemProps, finalName());
+    }
+
+    public String buildNativeRunnerName(Map<String, Object> taskSystemProps) {
+        String outputName = buildNativeRunnerBaseName(taskSystemProps);
+        if (Boolean.parseBoolean(resolveBuildProperty(QUARKUS_PACKAGE_ADD_RUNNER_SUFFIX, taskSystemProps, "true"))) {
+            return outputName + "-runner";
+        }
+        return outputName;
     }
 
     public Property<String> getFinalName() {
         return finalName;
     }
 
+    /**
+     * Whether the build output, build/*-runner[.jar] and build/quarkus-app, for other package types than the
+     * currently configured one are removed, default is 'true'.
+     */
+    public Property<Boolean> getCleanupBuildOutput() {
+        return cleanupBuildOutput;
+    }
+
+    public void setCleanupBuildOutput(boolean cleanupBuildOutput) {
+        this.cleanupBuildOutput.set(cleanupBuildOutput);
+    }
+
+    /**
+     * Whether large build artifacts, like uber-jar and native runners, are cached. Defaults to 'false' if the 'CI' environment
+     * variable is set, otherwise defaults to 'true'.
+     */
+    public Property<Boolean> getCacheLargeArtifacts() {
+        return cacheLargeArtifacts;
+    }
+
+    public void setCacheLargeArtifacts(boolean cacheLargeArtifacts) {
+        this.cacheLargeArtifacts.set(cacheLargeArtifacts);
+    }
+
     public String finalName() {
         return getFinalName().get();
     }