Migrate VersionsResourceTasks groovy->java

Issue: gh-4939

Author: larsgrefer

buildSrc/src/main/groovy/versions/VersionsResourceTasks.groovy

@@ -0,0 +1,49 @@
+package versions;
+
+import org.codehaus.groovy.runtime.ResourceGroovyMethods;
+import org.gradle.api.DefaultTask;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.provider.MapProperty;
+import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.OutputFile;
+import org.gradle.api.tasks.TaskAction;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.Writer;
+import java.util.Properties;
+
+public class VersionsResourceTasks extends DefaultTask {
+
+	private final RegularFileProperty versionsFile = getProject().getObjects().fileProperty();
+
+	private final MapProperty<String, String> versions = getProject().getObjects().mapProperty(String.class, String.class);
+
+	@OutputFile
+	public RegularFileProperty getVersionsFile() {
+		return versionsFile;
+	}
+
+	@Input
+	public MapProperty<String, String> getVersions() {
+		return versions;
+	}
+
+	@TaskAction
+	void generateVersions() throws IOException {
+
+		File file = versionsFile.getAsFile().get();
+		File parentFile = versionsFile.getAsFile().get().getParentFile();
+
+		if (parentFile.isDirectory() || parentFile.mkdirs()) {
+			Properties properties = new Properties();
+			properties.putAll(getVersions().get());
+			try (Writer writer = ResourceGroovyMethods.newWriter(file)) {
+				properties.store(writer, null);
+			}
+		}
+		else {
+			throw new IOException(parentFile + " does not exist and cannot be created");
+		}
+	}
+}

buildSrc/src/main/java/versions/VersionsResourceTasks.java

@@ -36,7 +36,7 @@ dependencies {
 
 task springVersion(type: versions.VersionsResourceTasks) {
 	versionsFile = file("${buildDir}/versions/spring-security.versions")
-	versions = { project.dependencyManagement.managedVersions }
+	versions = provider { project.dependencyManagement.managedVersions }
 }
 
 tasks.processResources {