/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.facebook.buck.core.rules.config;

import com.facebook.buck.core.model.BuildTarget;

/**
 * A rule that can be used to configure a build graph.
 *
 * <p>An example of such rule may be {@code config_setting} which is used together with {@code
 * select} to configure attribute values.
 */
public interface ConfigurationRule {

  /**
   * {@link com.facebook.buck.core.model.UnconfiguredBuildTarget} that identifies this rule in a
   * graph.
   */
  BuildTarget getBuildTarget();
}
