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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.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.actions.ActionAnalysisMetadata;
import com.google.devtools.build.lib.actions.ActionLookupValue;
import com.google.devtools.build.lib.actions.Actions.GeneratingActions;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.concurrent.ThreadSafety.ThreadSafe;
import com.google.devtools.build.lib.packages.Package;
import com.google.devtools.build.skyframe.SkyKey;
import java.util.List;
import javax.annotation.Nullable;
/**
* A configured target in the context of a Skyframe graph.
*/
@Immutable
@ThreadSafe
@VisibleForTesting
public final class ConfiguredTargetValue extends ActionLookupValue {
// These variables are only non-final because they may be clear()ed to save memory.
// configuredTarget is null only after it is cleared.
@Nullable private ConfiguredTarget configuredTarget;
// May be null either after clearing or because transitive packages are not tracked.
@Nullable private NestedSet<Package> transitivePackagesForPackageRootResolution;
ConfiguredTargetValue(
ConfiguredTarget configuredTarget,
GeneratingActions generatingActions,
@Nullable NestedSet<Package> transitivePackagesForPackageRootResolution,
boolean removeActionsAfterEvaluation) {
super(generatingActions, removeActionsAfterEvaluation);
this.configuredTarget = Preconditions.checkNotNull(configuredTarget, generatingActions);
this.transitivePackagesForPackageRootResolution = transitivePackagesForPackageRootResolution;
}
@VisibleForTesting
public ConfiguredTarget getConfiguredTarget() {
Preconditions.checkNotNull(configuredTarget);
return configuredTarget;
}
@VisibleForTesting
public List<ActionAnalysisMetadata> getActions() {
Preconditions.checkNotNull(configuredTarget, this);
return actions;
}
/**
* Returns the set of packages transitively loaded by this value. Must only be used for
* constructing the package -> source root map needed for some builds. If the caller has not
* specified that this map needs to be constructed (via the constructor argument in {@link
* ConfiguredTargetFunction#ConfiguredTargetFunction}), calling this will crash.
*/
public NestedSet<Package> getTransitivePackagesForPackageRootResolution() {
return Preconditions.checkNotNull(transitivePackagesForPackageRootResolution);
}
/**
* Clears configured target data from this value, leaving only the artifact->generating action
* map.
*
* <p>Should only be used when user specifies --discard_analysis_cache. Must be called at most
* once per value, after which {@link #getConfiguredTarget} and {@link #getActions} cannot be
* called.
*
* @param clearEverything if true, clear the {@link #configuredTarget}. If not, only the {@link
* #transitivePackagesForPackageRootResolution} field is cleared. Top-level targets need their
* {@link #configuredTarget} preserved, so should pass false here.
*/
public void clear(boolean clearEverything) {
Preconditions.checkNotNull(configuredTarget);
Preconditions.checkNotNull(transitivePackagesForPackageRootResolution);
if (clearEverything) {
configuredTarget = null;
}
transitivePackagesForPackageRootResolution = null;
}
@VisibleForTesting
public static SkyKey key(Label label, BuildConfiguration configuration) {
return ConfiguredTargetKey.of(label, configuration);
}
static ImmutableList<SkyKey> keys(Iterable<ConfiguredTargetKey> lacs) {
ImmutableList.Builder<SkyKey> keys = ImmutableList.builder();
for (ConfiguredTargetKey lac : lacs) {
keys.add(lac);
}
return keys.build();
}
/**
* Returns a label of ConfiguredTargetValue.
*/
@ThreadSafe
static Label extractLabel(SkyKey value) {
Object valueName = value.argument();
Preconditions.checkState(valueName instanceof ConfiguredTargetKey, valueName);
return ((ConfiguredTargetKey) valueName).getLabel();
}
@Override
public String toString() {
return getStringHelper().add("configuredTarget", configuredTarget).toString();
}
}
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