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// Copyright 2020 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 static com.google.common.collect.ImmutableList.toImmutableList;
import com.google.auto.value.AutoValue;
import com.google.common.collect.Iterables;
import com.google.devtools.build.lib.actions.ActionLookupKey;
import com.google.devtools.build.lib.actions.ActionLookupValue;
import com.google.devtools.build.lib.analysis.ConfiguredObjectValue;
import com.google.devtools.build.lib.analysis.TopLevelArtifactContext;
import com.google.devtools.build.lib.analysis.TopLevelArtifactHelper;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.util.Pair;
import com.google.devtools.build.skyframe.GraphTraversingHelper;
import com.google.devtools.build.skyframe.SkyFunction;
import com.google.devtools.build.skyframe.SkyFunctionException;
import com.google.devtools.build.skyframe.SkyFunctionName;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import javax.annotation.Nullable;
/**
* Checks to see if any artifacts to be built by this {@link ActionLookupKey} transitively depend on
* actions from an {@link ActionLookupValue} that has an action in conflict with another. If so,
* none of this key's artifacts will be built.
*/
class TopLevelActionLookupConflictFindingFunction implements SkyFunction {
@Nullable
@Override
public SkyValue compute(SkyKey skyKey, Environment env)
throws SkyFunctionException, InterruptedException {
Key key = (Key) skyKey;
Pair<ConfiguredObjectValue, TopLevelArtifactHelper.ArtifactsToBuild> valueAndArtifactsToBuild =
CompletionFunction.getValueAndArtifactsToBuild(key, env);
if (env.valuesMissing()) {
return null;
}
return GraphTraversingHelper.declareDependenciesAndCheckIfValuesMissingMaybeWithExceptions(
env,
ActionLookupConflictFindingFunction.convertArtifacts(
valueAndArtifactsToBuild.second.getAllArtifacts())
.collect(toImmutableList()))
? null
: ActionLookupConflictFindingValue.INSTANCE;
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return Label.print(((Key) skyKey).actionLookupKey().getLabel());
}
static Iterable<Key> keys(
Iterable<ActionLookupKey> keys, TopLevelArtifactContext topLevelArtifactContext) {
return Iterables.transform(keys, k -> Key.create(k, topLevelArtifactContext));
}
@AutoValue
abstract static class Key implements TopLevelActionLookupKey {
static Key create(
ActionLookupKey actionLookupKey, TopLevelArtifactContext topLevelArtifactContext) {
return new AutoValue_TopLevelActionLookupConflictFindingFunction_Key(
actionLookupKey, topLevelArtifactContext);
}
@Override
public SkyFunctionName functionName() {
return SkyFunctions.TOP_LEVEL_ACTION_LOOKUP_CONFLICT_FINDING;
}
}
}