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// Copyright 2014 The Bazel Authors. All rights reserved.
//
// 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.google.devtools.build.lib.skyframe;

import com.google.auto.value.AutoValue;
import com.google.common.collect.Iterables;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.TopLevelArtifactContext;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec;
import com.google.devtools.build.skyframe.SkyFunctionName;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import java.util.Collection;
import java.util.Set;

/** The value of a TargetCompletion. Just a sentinel. */
public class TargetCompletionValue implements SkyValue {
  @AutoCodec static final TargetCompletionValue INSTANCE = new TargetCompletionValue();

  private TargetCompletionValue() {}

  public static TargetCompletionKey key(
      ConfiguredTargetKey configuredTargetKey,
      TopLevelArtifactContext topLevelArtifactContext,
      boolean willTest) {
    return TargetCompletionKey.create(configuredTargetKey, topLevelArtifactContext, willTest);
  }

  public static Iterable<TargetCompletionKey> keys(
      Collection<ConfiguredTarget> targets,
      final TopLevelArtifactContext ctx,
      final Set<ConfiguredTarget> targetsToTest) {
    return Iterables.transform(
        targets,
        ct ->
            TargetCompletionKey.create(
                // Can't build top-level targets in host configuration.
                ConfiguredTargetKey.of(
                    ct, ct.getConfigurationKey(), /*isHostConfiguration=*/ false),
                ctx,
                targetsToTest.contains(ct)));
  }

  /** {@link SkyKey} for {@link TargetCompletionValue}. */
  @AutoCodec
  @AutoValue
  public abstract static class TargetCompletionKey implements SkyKey {
    @AutoCodec.Instantiator
    static TargetCompletionKey create(
        ConfiguredTargetKey configuredTargetKey,
        TopLevelArtifactContext topLevelArtifactContext,
        boolean willTest) {
      return new AutoValue_TargetCompletionValue_TargetCompletionKey(
          configuredTargetKey, topLevelArtifactContext, willTest);
    }

    @Override
    public SkyFunctionName functionName() {
      return SkyFunctions.TARGET_COMPLETION;
    }

    public abstract ConfiguredTargetKey configuredTargetKey();

    abstract TopLevelArtifactContext topLevelArtifactContext();

    abstract boolean willTest();
  }
}