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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.analysis;
import com.google.devtools.build.lib.actions.AbstractAction;
import com.google.devtools.build.lib.actions.ActionExecutionContext;
import com.google.devtools.build.lib.actions.ActionExecutionException;
import com.google.devtools.build.lib.actions.ActionKeyContext;
import com.google.devtools.build.lib.actions.ActionOwner;
import com.google.devtools.build.lib.actions.ActionResult;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.actions.CommandLineExpansionException;
import com.google.devtools.build.lib.actions.extra.ExtraActionInfo;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.util.Fingerprint;
import com.google.protobuf.GeneratedMessage.GeneratedExtension;
import com.google.protobuf.MessageLite;
import java.util.Collection;
import java.util.UUID;
/**
* An action that is inserted into the build graph only to provide info
* about rules to extra_actions.
*/
public class PseudoAction<InfoType extends MessageLite> extends AbstractAction {
private final UUID uuid;
private final String mnemonic;
private final GeneratedExtension<ExtraActionInfo, InfoType> infoExtension;
private final InfoType info;
public PseudoAction(UUID uuid, ActionOwner owner,
NestedSet<Artifact> inputs, Collection<Artifact> outputs,
String mnemonic,
GeneratedExtension<ExtraActionInfo, InfoType> infoExtension, InfoType info) {
super(owner, inputs, outputs);
this.uuid = uuid;
this.mnemonic = mnemonic;
this.infoExtension = infoExtension;
this.info = info;
}
@Override
public ActionResult execute(ActionExecutionContext actionExecutionContext)
throws ActionExecutionException {
throw new ActionExecutionException(
mnemonic + "ExtraAction should not be executed.", this, false);
}
@Override
public String getMnemonic() {
return mnemonic;
}
@Override
protected String computeKey(ActionKeyContext actionKeyContext) {
return new Fingerprint().addUUID(uuid).addBytes(getInfo().toByteArray()).hexDigestAndReset();
}
protected InfoType getInfo() {
return this.info;
}
@Override
public ExtraActionInfo.Builder getExtraActionInfo(ActionKeyContext actionKeyContext) {
try {
return super.getExtraActionInfo(actionKeyContext).setExtension(infoExtension, getInfo());
} catch (CommandLineExpansionException e) {
throw new AssertionError("PsedoAction command line expansion cannot fail");
}
}
public static Artifact getDummyOutput(RuleContext ruleContext) {
return ruleContext.getPackageRelativeArtifact(
ruleContext.getLabel().getName() + ".extra_action_dummy",
ruleContext.getConfiguration().getGenfilesDirectory(
ruleContext.getRule().getRepository()));
}
}
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