/
ConfigurationPropertiesPlugin.java
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/
ConfigurationPropertiesPlugin.java
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/*
* Copyright 2012-2022 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.boot.build.context.properties;
import java.io.File;
import java.util.Collections;
import java.util.concurrent.Callable;
import java.util.stream.Collectors;
import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.api.Task;
import org.gradle.api.artifacts.Configuration;
import org.gradle.api.file.RegularFile;
import org.gradle.api.plugins.JavaPlugin;
import org.gradle.api.plugins.JavaPluginConvention;
import org.gradle.api.provider.Provider;
import org.gradle.api.tasks.PathSensitivity;
import org.gradle.api.tasks.SourceSet;
import org.gradle.api.tasks.TaskProvider;
import org.gradle.api.tasks.compile.JavaCompile;
import org.gradle.language.base.plugins.LifecycleBasePlugin;
import org.springframework.util.StringUtils;
/**
* {@link Plugin} for projects that define {@code @ConfigurationProperties}. When applied,
* the plugin reacts to the presence of the {@link JavaPlugin} by:
*
* <ul>
* <li>Adding a dependency on the configuration properties annotation processor.
* <li>Disables incremental compilation to avoid property descriptions being lost.
* <li>Configuring the additional metadata locations annotation processor compiler
* argument.
* <li>Adding the outputs of the processResources task as inputs of the compileJava task
* to ensure that the additional metadata is available when the annotation processor runs.
* <li>Registering a {@link CheckAdditionalSpringConfigurationMetadata} task and
* configuring the {@code check} task to depend upon it.
* <li>Defining an artifact for the resulting configuration property metadata so that it
* can be consumed by downstream projects.
* </ul>
*
* @author Andy Wilkinson
*/
public class ConfigurationPropertiesPlugin implements Plugin<Project> {
/**
* Name of the {@link Configuration} that holds the configuration property metadata
* artifact.
*/
public static final String CONFIGURATION_PROPERTIES_METADATA_CONFIGURATION_NAME = "configurationPropertiesMetadata";
/**
* Name of the {@link CheckAdditionalSpringConfigurationMetadata} task.
*/
public static final String CHECK_ADDITIONAL_SPRING_CONFIGURATION_METADATA_TASK_NAME = "checkAdditionalSpringConfigurationMetadata";
/**
* Name of the {@link CheckAdditionalSpringConfigurationMetadata} task.
*/
public static final String CHECK_SPRING_CONFIGURATION_METADATA_TASK_NAME = "checkSpringConfigurationMetadata";
@Override
public void apply(Project project) {
project.getPlugins().withType(JavaPlugin.class, (javaPlugin) -> {
addConfigurationProcessorDependency(project);
disableIncrementalCompilation(project);
configureAdditionalMetadataLocationsCompilerArgument(project);
registerCheckAdditionalMetadataTask(project);
registerCheckMetadataTask(project);
addMetadataArtifact(project);
});
}
private void addConfigurationProcessorDependency(Project project) {
Configuration annotationProcessors = project.getConfigurations()
.getByName(JavaPlugin.ANNOTATION_PROCESSOR_CONFIGURATION_NAME);
annotationProcessors.getDependencies().add(project.getDependencies().project(Collections.singletonMap("path",
":spring-boot-project:spring-boot-tools:spring-boot-configuration-processor")));
}
private void disableIncrementalCompilation(Project project) {
SourceSet mainSourceSet = project.getConvention().getPlugin(JavaPluginConvention.class).getSourceSets()
.getByName(SourceSet.MAIN_SOURCE_SET_NAME);
project.getTasks().named(mainSourceSet.getCompileJavaTaskName(), JavaCompile.class)
.configure((compileJava) -> compileJava.getOptions().setIncremental(false));
}
private void addMetadataArtifact(Project project) {
SourceSet mainSourceSet = project.getConvention().getPlugin(JavaPluginConvention.class).getSourceSets()
.getByName(SourceSet.MAIN_SOURCE_SET_NAME);
project.getConfigurations().maybeCreate(CONFIGURATION_PROPERTIES_METADATA_CONFIGURATION_NAME);
project.afterEvaluate((evaluatedProject) -> evaluatedProject.getArtifacts().add(
CONFIGURATION_PROPERTIES_METADATA_CONFIGURATION_NAME,
evaluatedProject.provider((Callable<File>) () -> new File(mainSourceSet.getJava().getOutputDir(),
"META-INF/spring-configuration-metadata.json")),
(artifact) -> artifact
.builtBy(evaluatedProject.getTasks().getByName(mainSourceSet.getClassesTaskName()))));
}
private void configureAdditionalMetadataLocationsCompilerArgument(Project project) {
JavaCompile compileJava = project.getTasks().withType(JavaCompile.class)
.getByName(JavaPlugin.COMPILE_JAVA_TASK_NAME);
((Task) compileJava).getInputs().files(project.getTasks().getByName(JavaPlugin.PROCESS_RESOURCES_TASK_NAME))
.withPathSensitivity(PathSensitivity.RELATIVE).withPropertyName("processed resources");
SourceSet mainSourceSet = project.getConvention().getPlugin(JavaPluginConvention.class).getSourceSets()
.getByName(SourceSet.MAIN_SOURCE_SET_NAME);
compileJava.getOptions().getCompilerArgs()
.add("-Aorg.springframework.boot.configurationprocessor.additionalMetadataLocations=" + StringUtils
.collectionToCommaDelimitedString(mainSourceSet.getResources().getSourceDirectories().getFiles()
.stream().map(project.getRootProject()::relativePath).collect(Collectors.toSet())));
}
private void registerCheckAdditionalMetadataTask(Project project) {
TaskProvider<CheckAdditionalSpringConfigurationMetadata> checkConfigurationMetadata = project.getTasks()
.register(CHECK_ADDITIONAL_SPRING_CONFIGURATION_METADATA_TASK_NAME,
CheckAdditionalSpringConfigurationMetadata.class);
checkConfigurationMetadata.configure((check) -> {
SourceSet mainSourceSet = project.getConvention().getPlugin(JavaPluginConvention.class).getSourceSets()
.getByName(SourceSet.MAIN_SOURCE_SET_NAME);
check.setSource(mainSourceSet.getResources());
check.include("META-INF/additional-spring-configuration-metadata.json");
check.getReportLocation().set(project.getLayout().getBuildDirectory()
.file("reports/additional-spring-configuration-metadata/check.txt"));
});
project.getTasks().named(LifecycleBasePlugin.CHECK_TASK_NAME)
.configure((check) -> check.dependsOn(checkConfigurationMetadata));
}
private void registerCheckMetadataTask(Project project) {
TaskProvider<CheckSpringConfigurationMetadata> checkConfigurationMetadata = project.getTasks()
.register(CHECK_SPRING_CONFIGURATION_METADATA_TASK_NAME, CheckSpringConfigurationMetadata.class);
checkConfigurationMetadata.configure((check) -> {
SourceSet mainSourceSet = project.getConvention().getPlugin(JavaPluginConvention.class).getSourceSets()
.getByName(SourceSet.MAIN_SOURCE_SET_NAME);
Provider<RegularFile> metadataLocation = project.getTasks()
.named(mainSourceSet.getCompileJavaTaskName(), JavaCompile.class)
.flatMap((javaCompile) -> javaCompile.getDestinationDirectory()
.file("META-INF/spring-configuration-metadata.json"));
check.getMetadataLocation().set(metadataLocation);
check.getReportLocation().set(
project.getLayout().getBuildDirectory().file("reports/spring-configuration-metadata/check.txt"));
});
project.getTasks().named(LifecycleBasePlugin.CHECK_TASK_NAME)
.configure((check) -> check.dependsOn(checkConfigurationMetadata));
}
}