Disable rule and make the classpath uniqueness task verify runtimeCla…

…sspath not runtime

gradle-baseline-java/src/main/groovy/com/palantir/baseline/plugins/BaselineClassUniquenessPlugin.java

@@ -16,27 +16,36 @@
 
 package com.palantir.baseline.plugins;
 
-import com.palantir.baseline.plugins.rules.BaselineClassUniquenessRule;
+import com.palantir.baseline.tasks.CheckClassUniquenessTask;
 import org.gradle.api.Project;
+import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.plugins.JavaPlugin;
+import org.gradle.api.tasks.TaskProvider;
+import org.gradle.util.GUtil;
 
 /**
  * This plugin is similar to https://github.com/nebula-plugins/gradle-lint-plugin/wiki/Duplicate-Classes-Rule
- * but goes one step further and actually hashes any identically named classfiles to figure out if they're
+ * but goes one step further and actually hashes any identically named class files to figure out if they're
  * <i>completely</i> identical (and therefore safely interchangeable).
  *
  * The task only fails if it finds classes which have the same name but different implementations.
  */
 public class BaselineClassUniquenessPlugin extends AbstractBaselinePlugin {
     @Override
     public final void apply(Project project) {
-        BaselineClassUniquenessRule rule = new BaselineClassUniquenessRule(project);
-
-        project.getTasks().addRule(rule);
-
         project.getPlugins().withId("java", plugin -> {
-            rule.apply("checkRuntimeClassUniqueness");
-            project.getTasks().getByName("check")
-                    .dependsOn(project.getTasks().getByName("checkRuntimeClassUniqueness"));
+            Configuration runtimeClasspath =
+                    project.getConfigurations().getByName(JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME);
+            TaskProvider<CheckClassUniquenessTask> checkRuntimeClasspathTask = project
+                    .getTasks()
+                    .register(taskNameForConfiguration(runtimeClasspath), CheckClassUniquenessTask.class, task -> {
+                        task.setConfiguration(runtimeClasspath);
+                    });
+            project.getTasks().getByName("check").dependsOn(checkRuntimeClasspathTask);
         });
     }
+
+    private static String taskNameForConfiguration(Configuration configuration) {
+        return GUtil.toLowerCamelCase("check " + configuration.getName() + " classUniqueness");
+    }
 }