Try and make it work with older versions of Boot

Author: Dave Syer

gradle-plugin/src/main/java/org/springframework/boot/experimental/gradle/ThinLauncherPlugin.java

@@ -182,7 +182,7 @@ private Object getMainClass(Jar bootJar) {
 	}
 
 	private Task createPomTask(final Project project) {
-		return project.getTasks().create("thinPom", PomTask.class, new Action<PomTask>() {
+		Task result = project.getTasks().create("thinPom", PomTask.class, new Action<PomTask>() {
 			@Override
 			public void execute(final PomTask thin) {
 				project.getTasks().withType(Jar.class, new Action<Jar>() {
@@ -203,7 +203,14 @@ public void execute(Task task) {
 				thin.setOutput(new File(resourcesDir, "META-INF/maven/"
 						+ project.getGroup() + "/" + project.getName()));
 			}
-		}).mustRunAfter("resolveMainClassName", "test");
+		});
+		if (project.getTasks().findByName("resolveMainClassName") != null) {
+			result.mustRunAfter("resolveMainClassName", "test");
+		}
+		if (project.getTasks().findByName("bootJarMainClassName") != null) {
+			result.mustRunAfter("bootJarMainClassName", "test");
+		}
+		return result;
 	}
 
 	private Task createPropertiesTask(final Project project) {
@@ -291,7 +298,7 @@ public void execute(Task task) {
 				List<String> args = new ArrayList<>(Arrays.asList(
 						"-Dthin.root=.", "-Dthin.dryrun", "-jar",
 						"../spring-boot-thin-wrapper.jar"));
-				args.add(1, "-Dthin.archive=" + thinJar.getArchiveName());
+				args.add(1, "-Dthin.archive=" + thinJar.getArchivePath());
 				String thinRepo = getThinRepo(project);
 				if (thinRepo != null) {
 					args.add(1, "-Dthin.repo=" + thinRepo);

samples/simple/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.2.1-bin.zip