Update BuildInfo to support Gradle's configuration cache

See gh-22922

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/tasks/buildinfo/BuildInfo.java

@@ -24,6 +24,7 @@ import java.util.Map;
 import org.gradle.api.Action;
 import org.gradle.api.Project;
 import org.gradle.api.Task;
+import org.gradle.api.file.DirectoryProperty;
 import org.gradle.api.internal.ConventionTask;
 import org.gradle.api.tasks.Nested;
 import org.gradle.api.tasks.OutputDirectory;
@@ -44,7 +45,12 @@ public class BuildInfo extends ConventionTask {
 
 	private final BuildInfoProperties properties = new BuildInfoProperties(getProject());
 
-	private File destinationDir;
+	private final DirectoryProperty destinationDir;
+
+	public BuildInfo() {
+		this.destinationDir = getProject().getObjects().directoryProperty()
+				.convention(getProject().getLayout().getBuildDirectory());
+	}
 
 	/**
 	 * Generates the {@code build-info.properties} file in the configured
@@ -73,7 +79,7 @@ public class BuildInfo extends ConventionTask {
 	 */
 	@OutputDirectory
 	public File getDestinationDir() {
-		return (this.destinationDir != null) ? this.destinationDir : getProject().getBuildDir();
+		return this.destinationDir.getAsFile().get();
 	}
 
 	/**
@@ -81,7 +87,7 @@ public class BuildInfo extends ConventionTask {
 	 * @param destinationDir the destination directory
 	 */
 	public void setDestinationDir(File destinationDir) {
-		this.destinationDir = destinationDir;
+		this.destinationDir.set(destinationDir);
 	}
 
 	/**

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/tasks/buildinfo/BuildInfoProperties.java

@@ -16,6 +16,8 @@
 
 package org.springframework.boot.gradle.tasks.buildinfo;
 
+import java.io.IOException;
+import java.io.ObjectInputStream;
 import java.io.Serializable;
 import java.time.Instant;
 import java.util.HashMap;
@@ -23,6 +25,7 @@ import java.util.Map;
 
 import org.gradle.api.Project;
 import org.gradle.api.provider.Property;
+import org.gradle.api.provider.Provider;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.Optional;
 
@@ -35,6 +38,8 @@ import org.gradle.api.tasks.Optional;
 @SuppressWarnings("serial")
 public class BuildInfoProperties implements Serializable {
 
+	private transient Instant creationTime = Instant.now();
+
 	private final Property<String> group;
 
 	private final Property<String> artifact;
@@ -43,22 +48,35 @@ public class BuildInfoProperties implements Serializable {
 
 	private final Property<String> name;
 
-	private final Property<Instant> time;
+	private final Property<Long> time;
+
+	private boolean timeConfigured = false;
 
 	private Map<String, Object> additionalProperties = new HashMap<>();
 
 	BuildInfoProperties(Project project) {
-		this.time = project.getObjects().property(Instant.class);
-		this.time.set(Instant.now());
+		this.time = project.getObjects().property(Long.class);
 		this.group = project.getObjects().property(String.class);
 		this.group.set(project.provider(() -> project.getGroup().toString()));
 		this.artifact = project.getObjects().property(String.class);
 		this.version = project.getObjects().property(String.class);
-		this.version.set(project.provider(() -> project.getVersion().toString()));
+		this.version.set(projectVersion(project));
 		this.name = project.getObjects().property(String.class);
 		this.name.set(project.provider(project::getName));
 	}
 
+	private Provider<String> projectVersion(Project project) {
+		try {
+			Provider<String> externalVersionProperty = project.getProviders().gradleProperty("version")
+					.forUseAtConfigurationTime();
+			externalVersionProperty.getOrNull();
+		}
+		catch (NoSuchMethodError ex) {
+			// Gradle < 6.5
+		}
+		return project.provider(() -> project.getVersion().toString());
+	}
+
 	/**
 	 * Returns the value used for the {@code build.group} property. Defaults to the
 	 * {@link Project#getGroup() Project's group}.
@@ -142,7 +160,14 @@ public class BuildInfoProperties implements Serializable {
 	@Input
 	@Optional
 	public Instant getTime() {
-		return this.time.getOrNull();
+		Long epochMillis = this.time.getOrNull();
+		if (epochMillis != null) {
+			return Instant.ofEpochMilli(epochMillis);
+		}
+		if (this.timeConfigured) {
+			return null;
+		}
+		return this.creationTime;
 	}
 
 	/**
@@ -150,7 +175,8 @@ public class BuildInfoProperties implements Serializable {
 	 * @param time the build time
 	 */
 	public void setTime(Instant time) {
-		this.time.set(time);
+		this.timeConfigured = true;
+		this.time.set((time != null) ? time.toEpochMilli() : null);
 	}
 
 	/**
@@ -173,4 +199,9 @@ public class BuildInfoProperties implements Serializable {
 		this.additionalProperties = additionalProperties;
 	}
 
+	private void readObject(ObjectInputStream input) throws ClassNotFoundException, IOException {
+		input.defaultReadObject();
+		this.creationTime = Instant.now();
+	}
+
 }

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/tasks/buildinfo/BuildInfoIntegrationTests.java

@@ -19,9 +19,13 @@ package org.springframework.boot.gradle.tasks.buildinfo;
 import java.io.File;
 import java.io.FileReader;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+import java.time.Instant;
 import java.util.Properties;
 
-import org.gradle.testkit.runner.BuildResult;
 import org.gradle.testkit.runner.InvalidRunnerConfigurationException;
 import org.gradle.testkit.runner.TaskOutcome;
 import org.gradle.testkit.runner.UnexpectedBuildFailure;
@@ -38,7 +42,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Andy Wilkinson
  */
-@GradleCompatibility
+@GradleCompatibility(configurationCache = true)
 class BuildInfoIntegrationTests {
 
 	GradleBuild gradleBuild;
@@ -69,7 +73,14 @@ class BuildInfoIntegrationTests {
 	@TestTemplate
 	void notUpToDateWhenExecutedTwiceAsTimeChanges() {
 		assertThat(this.gradleBuild.build("buildInfo").task(":buildInfo").getOutcome()).isEqualTo(TaskOutcome.SUCCESS);
+		Properties first = buildInfoProperties();
+		String firstBuildTime = first.getProperty("build.time");
+		assertThat(firstBuildTime).isNotNull();
 		assertThat(this.gradleBuild.build("buildInfo").task(":buildInfo").getOutcome()).isEqualTo(TaskOutcome.SUCCESS);
+		Properties second = buildInfoProperties();
+		String secondBuildTime = second.getProperty("build.time");
+		assertThat(secondBuildTime).isNotNull();
+		assertThat(Instant.parse(firstBuildTime).isBefore(Instant.parse(secondBuildTime)));
 	}
 
 	@TestTemplate
@@ -81,11 +92,22 @@ class BuildInfoIntegrationTests {
 	}
 
 	@TestTemplate
-	void notUpToDateWhenExecutedTwiceWithFixedTimeAndChangedProjectVersion() {
-		assertThat(this.gradleBuild.build("buildInfo", "-PnullTime").task(":buildInfo").getOutcome())
-				.isEqualTo(TaskOutcome.SUCCESS);
-		BuildResult result = this.gradleBuild.build("buildInfo", "-PnullTime", "-PprojectVersion=0.2.0");
-		assertThat(result.task(":buildInfo").getOutcome()).isEqualTo(TaskOutcome.SUCCESS);
+	void notUpToDateWhenExecutedTwiceWithFixedTimeAndChangedProjectVersion() throws IOException {
+		assertThat(this.gradleBuild.scriptProperty("projectVersion", "0.1.0").build("buildInfo").task(":buildInfo")
+				.getOutcome()).isEqualTo(TaskOutcome.SUCCESS);
+		assertThat(this.gradleBuild.scriptProperty("projectVersion", "0.2.0").build("buildInfo").task(":buildInfo")
+				.getOutcome()).isEqualTo(TaskOutcome.SUCCESS);
+	}
+
+	@TestTemplate
+	void notUpToDateWhenExecutedTwiceWithFixedTimeAndChangedGradlePropertiesProjectVersion() throws IOException {
+		Path gradleProperties = new File(this.gradleBuild.getProjectDir(), "gradle.properties").toPath();
+		Files.write(gradleProperties, "version=0.1.0".getBytes(StandardCharsets.UTF_8), StandardOpenOption.CREATE,
+				StandardOpenOption.WRITE, StandardOpenOption.TRUNCATE_EXISTING);
+		assertThat(this.gradleBuild.build("buildInfo").task(":buildInfo").getOutcome()).isEqualTo(TaskOutcome.SUCCESS);
+		Files.write(gradleProperties, "version=0.2.0".getBytes(StandardCharsets.UTF_8), StandardOpenOption.CREATE,
+				StandardOpenOption.WRITE, StandardOpenOption.TRUNCATE_EXISTING);
+		assertThat(this.gradleBuild.build("buildInfo").task(":buildInfo").getOutcome()).isEqualTo(TaskOutcome.SUCCESS);
 	}
 
 	@TestTemplate

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/tasks/buildinfo/BuildInfoTests.java

@@ -24,6 +24,8 @@ import java.time.format.DateTimeFormatter;
 import java.util.Properties;
 
 import org.gradle.api.Project;
+import org.gradle.api.internal.project.ProjectInternal;
+import org.gradle.initialization.GradlePropertiesController;
 import org.gradle.testfixtures.ProjectBuilder;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.io.TempDir;
@@ -125,7 +127,10 @@ class BuildInfoTests {
 
 	private Project createProject(String projectName) {
 		File projectDir = new File(this.temp, projectName);
-		return ProjectBuilder.builder().withProjectDir(projectDir).withName(projectName).build();
+		Project project = ProjectBuilder.builder().withProjectDir(projectDir).withName(projectName).build();
+		((ProjectInternal) project).getServices().get(GradlePropertiesController.class)
+				.loadGradlePropertiesFrom(projectDir);
+		return project;
 	}
 
 	private BuildInfo createTask(Project project) {

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/testkit/GradleBuild.java

@@ -176,7 +176,7 @@ public class GradleBuild {
 				new File(this.projectDir, "repository"));
 		GradleRunner gradleRunner = GradleRunner.create().withProjectDir(this.projectDir)
 				.withPluginClasspath(pluginClasspath());
-		if (this.dsl != Dsl.KOTLIN) {
+		if (this.dsl != Dsl.KOTLIN && !this.configurationCache) {
 			// see https://github.com/gradle/gradle/issues/6862
 			gradleRunner.withDebug(true);
 		}

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/buildinfo/BuildInfoIntegrationTests-basicExecution.gradle

+plugins {
+	id 'org.springframework.boot' version '{version}' apply false
+}
+
+version = '0.1.0'
+
+task buildInfo(type: org.springframework.boot.gradle.tasks.buildinfo.BuildInfo) {
+	destinationDir project.buildDir
+	properties {
+		artifact = 'foo'
+		group = 'foo'
+		name = 'foo'
+		additional = ['additional': 'foo']
+	}
+}

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/buildinfo/BuildInfoIntegrationTests-defaultValues.gradle

@@ -2,8 +2,4 @@ plugins {
 	id 'org.springframework.boot' version '{version}' apply false
 }
 
-def property(String name, Object defaultValue) {
-	project.hasProperty(name) ? project.getProperty(name) : defaultValue
-}
-
 task buildInfo(type: org.springframework.boot.gradle.tasks.buildinfo.BuildInfo)

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/buildinfo/BuildInfoIntegrationTests-notUpToDateWhenExecutedTwiceAsTimeChanges.gradle

+plugins {
+	id 'org.springframework.boot' version '{version}' apply false
+}
+
+task buildInfo(type: org.springframework.boot.gradle.tasks.buildinfo.BuildInfo)

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/buildinfo/BuildInfoIntegrationTests-notUpToDateWhenExecutedTwiceWithFixedTimeAndChangedGradlePropertiesProjectVersion.gradle

+plugins {
+	id 'org.springframework.boot' version '{version}' apply false
+}
+
+task buildInfo(type: org.springframework.boot.gradle.tasks.buildinfo.BuildInfo) {
+	properties {
+		artifact = 'example'
+		group = 'com.example'
+		name = 'example'
+		additional = ['additional': 'alpha']
+		time = null
+	}
+}

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/buildinfo/BuildInfoIntegrationTests-notUpToDateWhenExecutedTwiceWithFixedTimeAndChangedProjectVersion.gradle

+plugins {
+	id 'org.springframework.boot' version '{version}' apply false
+}
+
+version = '{projectVersion}'
+
+task buildInfo(type: org.springframework.boot.gradle.tasks.buildinfo.BuildInfo) {
+	properties {
+		artifact = 'example'
+		group = 'com.example'
+		name = 'example'
+		additional = ['additional': 'alpha']
+		time = null
+	}
+}

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/buildinfo/BuildInfoIntegrationTests-reproducibleOutputWithFixedTime.gradle

+plugins {
+	id 'org.springframework.boot' version '{version}' apply false
+}
+
+task buildInfo(type: org.springframework.boot.gradle.tasks.buildinfo.BuildInfo) {
+	properties {
+		time = null
+	}
+}

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/buildinfo/BuildInfoIntegrationTests-upToDateWhenExecutedTwiceWithFixedTime.gradle

+plugins {
+	id 'org.springframework.boot' version '{version}' apply false
+}
+
+task buildInfo(type: org.springframework.boot.gradle.tasks.buildinfo.BuildInfo) {
+	properties {
+		time = null
+	}
+}

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/tasks/buildinfo/BuildInfoIntegrationTests.gradle

-plugins {
-	id 'org.springframework.boot' version '{version}' apply false
-}
-
-def property(String name, Object defaultValue) {
-	project.hasProperty(name) ? project.getProperty(name) : defaultValue
-}
-
-version = property('projectVersion', '0.1.0')
-
-task buildInfo(type: org.springframework.boot.gradle.tasks.buildinfo.BuildInfo) {
-	destinationDir file(property('buildInfoDestinationDir', project.buildDir))
-	properties {
-		artifact = property('buildInfoArtifact', 'foo')
-		group = property('buildInfoGroup', 'foo')
-		name = property('buildInfoName', 'foo')
-		additional = ['additional': property('buildInfoAdditional', 'foo')]
-		if (project.hasProperty('nullTime')) {
-			time = null
-		}
-	}
-}