Remove code related to unsupported versions of Gradle

Closes gh-29681

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/plugin/ApplicationPluginAction.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * 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.
@@ -20,7 +20,6 @@ import java.io.File;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.StringWriter;
-import java.lang.reflect.Method;
 import java.util.concurrent.Callable;
 
 import org.gradle.api.GradleException;
@@ -30,16 +29,10 @@ import org.gradle.api.distribution.Distribution;
 import org.gradle.api.distribution.DistributionContainer;
 import org.gradle.api.file.CopySpec;
 import org.gradle.api.file.FileCollection;
-import org.gradle.api.internal.IConventionAware;
 import org.gradle.api.plugins.ApplicationPlugin;
 import org.gradle.api.plugins.ApplicationPluginConvention;
-import org.gradle.api.provider.Property;
-import org.gradle.api.provider.Provider;
 import org.gradle.jvm.application.scripts.TemplateBasedScriptGenerator;
 import org.gradle.jvm.application.tasks.CreateStartScripts;
-import org.gradle.util.GradleVersion;
-
-import org.springframework.boot.gradle.tasks.application.CreateBootStartScripts;
 
 /**
  * Action that is executed in response to the {@link ApplicationPlugin} being applied.
@@ -54,9 +47,9 @@ final class ApplicationPluginAction implements PluginApplicationAction {
 				.getPlugin(ApplicationPluginConvention.class);
 		DistributionContainer distributions = project.getExtensions().getByType(DistributionContainer.class);
 		Distribution distribution = distributions.create("boot");
-		configureBaseNameConvention(project, applicationConvention, distribution);
-		CreateStartScripts bootStartScripts = project.getTasks().create("bootStartScripts",
-				determineCreateStartScriptsClass());
+		distribution.getDistributionBaseName()
+				.convention((project.provider(() -> applicationConvention.getApplicationName() + "-boot")));
+		CreateStartScripts bootStartScripts = project.getTasks().create("bootStartScripts", CreateStartScripts.class);
 		bootStartScripts
 				.setDescription("Generates OS-specific start scripts to run the project as a Spring Boot application.");
 		((TemplateBasedScriptGenerator) bootStartScripts.getUnixStartScriptGenerator())
@@ -81,45 +74,6 @@ final class ApplicationPluginAction implements PluginApplicationAction {
 		distribution.getContents().with(binCopySpec);
 	}
 
-	private Class<? extends CreateStartScripts> determineCreateStartScriptsClass() {
-		return isGradle64OrLater() ? CreateStartScripts.class : CreateBootStartScripts.class;
-	}
-
-	private boolean isGradle64OrLater() {
-		return GradleVersion.current().getBaseVersion().compareTo(GradleVersion.version("6.4")) >= 0;
-	}
-
-	@SuppressWarnings("unchecked")
-	private void configureBaseNameConvention(Project project, ApplicationPluginConvention applicationConvention,
-			Distribution distribution) {
-		Method getDistributionBaseName = findMethod(distribution.getClass(), "getDistributionBaseName");
-		if (getDistributionBaseName != null) {
-			try {
-				Property<String> distributionBaseName = (Property<String>) distribution.getClass()
-						.getMethod("getDistributionBaseName").invoke(distribution);
-				distributionBaseName.getClass().getMethod("convention", Provider.class).invoke(distributionBaseName,
-						project.provider(() -> applicationConvention.getApplicationName() + "-boot"));
-				return;
-			}
-			catch (Exception ex) {
-				// Continue
-			}
-		}
-		if (distribution instanceof IConventionAware) {
-			((IConventionAware) distribution).getConventionMapping().map("baseName",
-					() -> applicationConvention.getApplicationName() + "-boot");
-		}
-	}
-
-	private static Method findMethod(Class<?> type, String name) {
-		for (Method candidate : type.getMethods()) {
-			if (candidate.getName().equals(name)) {
-				return candidate;
-			}
-		}
-		return null;
-	}
-
 	@Override
 	public Class<? extends Plugin<Project>> getPluginClass() {
 		return ApplicationPlugin.class;

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/plugin/JavaPluginAction.java

@@ -47,7 +47,6 @@ import org.gradle.api.tasks.bundling.Jar;
 import org.gradle.api.tasks.compile.JavaCompile;
 import org.gradle.jvm.toolchain.JavaToolchainService;
 import org.gradle.jvm.toolchain.JavaToolchainSpec;
-import org.gradle.util.GradleVersion;
 
 import org.springframework.boot.gradle.tasks.bundling.BootBuildImage;
 import org.springframework.boot.gradle.tasks.bundling.BootJar;
@@ -158,15 +157,9 @@ final class JavaPluginAction implements PluginApplicationAction {
 	}
 
 	private void configureToolchainConvention(Project project, BootRun run) {
-		if (isGradle67OrLater()) {
-			JavaToolchainSpec toolchain = project.getExtensions().getByType(JavaPluginExtension.class).getToolchain();
-			JavaToolchainService toolchainService = project.getExtensions().getByType(JavaToolchainService.class);
-			run.getJavaLauncher().convention(toolchainService.launcherFor(toolchain));
-		}
-	}
-
-	private boolean isGradle67OrLater() {
-		return GradleVersion.current().getBaseVersion().compareTo(GradleVersion.version("6.7")) >= 0;
+		JavaToolchainSpec toolchain = project.getExtensions().getByType(JavaPluginExtension.class).getToolchain();
+		JavaToolchainService toolchainService = project.getExtensions().getByType(JavaToolchainService.class);
+		run.getJavaLauncher().convention(toolchainService.launcherFor(toolchain));
 	}
 
 	private JavaPluginConvention javaPluginConvention(Project project) {

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/plugin/ResolveMainClassName.java

@@ -176,18 +176,12 @@ public class ResolveMainClassName extends DefaultTask {
 		return resolveMainClassNameProvider;
 	}
 
-	@SuppressWarnings("deprecation")
 	private static String getJavaApplicationMainClass(Convention convention) {
 		JavaApplication javaApplication = convention.findByType(JavaApplication.class);
 		if (javaApplication == null) {
 			return null;
 		}
-		try {
-			return javaApplication.getMainClass().getOrNull();
-		}
-		catch (NoSuchMethodError ex) {
-			return javaApplication.getMainClassName();
-		}
+		return javaApplication.getMainClass().getOrNull();
 	}
 
 	private static final class ClassNameReader implements Transformer<String, RegularFile> {

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/tasks/application/CreateBootStartScripts.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * 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.
@@ -25,7 +25,9 @@ import org.gradle.jvm.application.tasks.CreateStartScripts;
  *
  * @author Andy Wilkinson
  * @since 2.0.0
+ * @deprecated since 2.5.10 for removal in 2.8.0 in favor of {@link CreateStartScripts}.
  */
+@Deprecated
 public class CreateBootStartScripts extends CreateStartScripts {
 
 	@Override

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * 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.
@@ -66,14 +66,9 @@ public class BuildInfoProperties implements Serializable {
 	}
 
 	private Provider<String> projectVersion(Project project) {
-		try {
-			Provider<String> externalVersionProperty = project.getProviders().gradleProperty("version")
-					.forUseAtConfigurationTime();
-			externalVersionProperty.getOrNull();
-		}
-		catch (NoSuchMethodError ex) {
-			// Gradle < 6.5
-		}
+		Provider<String> externalVersionProperty = project.getProviders().gradleProperty("version")
+				.forUseAtConfigurationTime();
+		externalVersionProperty.getOrNull();
 		return project.provider(() -> project.getVersion().toString());
 	}
 

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/tasks/run/BootRun.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * 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.
@@ -89,14 +89,9 @@ public class BootRun extends JavaExec {
 	}
 
 	private boolean isJava13OrLater() {
-		try {
-			Property<JavaLauncher> javaLauncher = this.getJavaLauncher();
-			if (javaLauncher.isPresent()) {
-				return javaLauncher.get().getMetadata().getLanguageVersion().asInt() >= 13;
-			}
-		}
-		catch (NoSuchMethodError ex) {
-			// Continue
+		Property<JavaLauncher> javaLauncher = this.getJavaLauncher();
+		if (javaLauncher.isPresent()) {
+			return javaLauncher.get().getMetadata().getLanguageVersion().asInt() >= 13;
 		}
 		for (Method method : String.class.getMethods()) {
 			if (method.getName().equals("stripIndent")) {