DependencyAggregationTestUtil.java

/*
 * Copyright 2016-present Facebook, Inc.
 *
 * 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.rules;

import java.util.stream.Stream;

public final class DependencyAggregationTestUtil {
  private DependencyAggregationTestUtil() {}

  /** Return dependencies of a rule, traversing through any dependency aggregations. */
  public static Stream<BuildRule> getDisaggregatedDeps(BuildRule rule) {
    return rule.getBuildDeps()
        .stream()
        .flatMap(
            (x) -> x instanceof DependencyAggregation ? x.getBuildDeps().stream() : Stream.of(x));
  }
}