Add Gradle Lock Plugin

Issue gh-7788

buildSrc/src/main/java/lock/GlobalLockTask.java

@@ -0,0 +1,40 @@
+package lock;
+
+import org.gradle.api.Action;
+import org.gradle.api.DefaultTask;
+import org.gradle.api.Project;
+import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.tasks.TaskAction;
+
+import java.util.function.Consumer;
+
+/**
+ * @author Rob Winch
+ */
+public class GlobalLockTask extends DefaultTask {
+	@TaskAction
+	public void lock() {
+		Project taskProject = getProject();
+		if (!taskProject.getGradle().getStartParameter().isWriteDependencyLocks()) {
+			throw new IllegalStateException("You just specify --write-locks argument");
+		}
+		writeLocksFor(taskProject);
+		taskProject.getSubprojects().forEach(new Consumer<Project>() {
+			@Override
+			public void accept(Project subproject) {
+				writeLocksFor(subproject);
+			}
+		});
+	}
+
+	private void writeLocksFor(Project project) {
+		project.getConfigurations().configureEach(new Action<Configuration>() {
+			@Override
+			public void execute(Configuration configuration) {
+				if (configuration.isCanBeResolved()) {
+					configuration.resolve();
+				}
+			}
+		});
+	}
+}