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// Copyright 2014 Google Inc. 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.analysis;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import com.google.common.collect.Multimap;
import com.google.common.collect.Sets;
import com.google.devtools.build.lib.actions.Action;
import com.google.devtools.build.lib.actions.ActionGraph;
import com.google.devtools.build.lib.actions.ActionGraphVisitor;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.rules.extra.ExtraActionSpec;
import java.util.Collection;
import java.util.List;
import java.util.Set;
import javax.annotation.Nullable;
/**
* A bipartite graph visitor which accumulates extra actions for a target.
*/
final class ExtraActionsVisitor extends ActionGraphVisitor {
private final RuleContext ruleContext;
private final Multimap<String, ExtraActionSpec> mnemonicToExtraActionMap;
private final List<Artifact> extraArtifacts;
public final Set<Action> actions = Sets.newHashSet();
/** Creates a new visitor for the extra actions associated with the given target. */
public ExtraActionsVisitor(RuleContext ruleContext,
Multimap<String, ExtraActionSpec> mnemonicToExtraActionMap) {
super(getActionGraph(ruleContext));
this.ruleContext = ruleContext;
this.mnemonicToExtraActionMap = mnemonicToExtraActionMap;
extraArtifacts = Lists.newArrayList();
}
public void addExtraAction(Action original) {
Collection<ExtraActionSpec> extraActions = mnemonicToExtraActionMap.get(
original.getMnemonic());
if (extraActions != null) {
for (ExtraActionSpec extraAction : extraActions) {
extraArtifacts.addAll(extraAction.addExtraAction(ruleContext, original));
}
}
}
@Override
protected void visitAction(Action action) {
actions.add(action);
addExtraAction(action);
}
/** Retrieves the collected artifacts since this method was last called and clears the list. */
public ImmutableList<Artifact> getAndResetExtraArtifacts() {
ImmutableList<Artifact> collected = ImmutableList.copyOf(extraArtifacts);
extraArtifacts.clear();
return collected;
}
/** Gets an action graph wrapper for the given target through its analysis environment. */
private static ActionGraph getActionGraph(final RuleContext ruleContext) {
return new ActionGraph() {
@Override
@Nullable
public Action getGeneratingAction(Artifact artifact) {
return ruleContext.getAnalysisEnvironment().getLocalGeneratingAction(artifact);
}
};
}
}
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