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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.bazel;
import com.google.common.base.Supplier;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.actions.ActionContextProvider;
import com.google.devtools.build.lib.actions.ActionExecutionContext;
import com.google.devtools.build.lib.actions.ActionExecutionException;
import com.google.devtools.build.lib.actions.ActionGraph;
import com.google.devtools.build.lib.actions.ActionInputFileCache;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.actions.ArtifactFactory;
import com.google.devtools.build.lib.actions.ArtifactOwner;
import com.google.devtools.build.lib.actions.ExecutionStrategy;
import com.google.devtools.build.lib.actions.Executor;
import com.google.devtools.build.lib.actions.Executor.ActionContext;
import com.google.devtools.build.lib.actions.ExecutorInitException;
import com.google.devtools.build.lib.actions.ResourceSet;
import com.google.devtools.build.lib.actions.Root;
import com.google.devtools.build.lib.analysis.BuildInfoHelper;
import com.google.devtools.build.lib.analysis.WorkspaceStatusAction;
import com.google.devtools.build.lib.analysis.WorkspaceStatusAction.Key;
import com.google.devtools.build.lib.runtime.BlazeModule;
import com.google.devtools.build.lib.runtime.BlazeRuntime;
import com.google.devtools.build.lib.runtime.Command;
import com.google.devtools.build.lib.vfs.FileSystemUtils;
import com.google.devtools.build.lib.vfs.PathFragment;
import java.io.IOException;
import java.util.Map;
import java.util.Objects;
import java.util.UUID;
/**
* Workspace status information for Bazel.
*
* <p>Currently only a stub.
*/
public class BazelWorkspaceStatusModule extends BlazeModule {
private static class BazelWorkspaceStatusAction extends WorkspaceStatusAction {
private final Artifact stableStatus;
private final Artifact volatileStatus;
private BazelWorkspaceStatusAction(
Artifact stableStatus, Artifact volatileStatus) {
super(BuildInfoHelper.BUILD_INFO_ACTION_OWNER, Artifact.NO_ARTIFACTS,
ImmutableList.of(stableStatus, volatileStatus));
this.stableStatus = stableStatus;
this.volatileStatus = volatileStatus;
}
@Override
public String describeStrategy(Executor executor) {
return "";
}
@Override
public void execute(ActionExecutionContext actionExecutionContext)
throws ActionExecutionException {
try {
FileSystemUtils.writeContent(stableStatus.getPath(), new byte[] {});
FileSystemUtils.writeContent(volatileStatus.getPath(), new byte[] {});
} catch (IOException e) {
throw new ActionExecutionException(e, this, true);
}
}
// TODO(bazel-team): Add test for equals, add hashCode.
@Override
public boolean equals(Object o) {
if (!(o instanceof BazelWorkspaceStatusAction)) {
return false;
}
BazelWorkspaceStatusAction that = (BazelWorkspaceStatusAction) o;
return this.stableStatus.equals(that.stableStatus)
&& this.volatileStatus.equals(that.volatileStatus);
}
@Override
public int hashCode() {
return Objects.hash(stableStatus, volatileStatus);
}
@Override
public String getMnemonic() {
return "BazelWorkspaceStatusAction";
}
@Override
public ResourceSet estimateResourceConsumption(Executor executor) {
return ResourceSet.ZERO;
}
@Override
protected String computeKey() {
return "";
}
@Override
public Artifact getVolatileStatus() {
return volatileStatus;
}
@Override
public Artifact getStableStatus() {
return stableStatus;
}
}
private class BazelStatusActionFactory implements WorkspaceStatusAction.Factory {
@Override
public Map<String, String> createDummyWorkspaceStatus() {
return ImmutableMap.of();
}
@Override
public WorkspaceStatusAction createWorkspaceStatusAction(
ArtifactFactory factory, ArtifactOwner artifactOwner, Supplier<UUID> buildId) {
Root root = runtime.getDirectories().getBuildDataDirectory();
Artifact stableArtifact = factory.getDerivedArtifact(
new PathFragment("stable-status.txt"), root, artifactOwner);
Artifact volatileArtifact = factory.getConstantMetadataArtifact(
new PathFragment("volatile-status.txt"), root, artifactOwner);
return new BazelWorkspaceStatusAction(stableArtifact, volatileArtifact);
}
}
@ExecutionStrategy(contextType = WorkspaceStatusAction.Context.class)
private class BazelWorkspaceStatusActionContext implements WorkspaceStatusAction.Context {
@Override
public ImmutableMap<String, Key> getStableKeys() {
return ImmutableMap.of();
}
@Override
public ImmutableMap<String, Key> getVolatileKeys() {
return ImmutableMap.of();
}
}
private class WorkspaceActionContextProvider implements ActionContextProvider {
@Override
public Iterable<ActionContext> getActionContexts() {
return ImmutableList.<ActionContext>of(new BazelWorkspaceStatusActionContext());
}
@Override
public void executorCreated(Iterable<ActionContext> usedContexts)
throws ExecutorInitException {
}
@Override
public void executionPhaseEnding() {
}
@Override
public void executionPhaseStarting(ActionInputFileCache actionInputFileCache,
ActionGraph actionGraph, Iterable<Artifact> topLevelArtifacts) throws ExecutorInitException,
InterruptedException {
}
}
private BlazeRuntime runtime;
@Override
public void beforeCommand(BlazeRuntime runtime, Command command) {
this.runtime = runtime;
}
@Override
public ActionContextProvider getActionContextProvider() {
return new WorkspaceActionContextProvider();
}
@Override
public WorkspaceStatusAction.Factory getWorkspaceStatusActionFactory() {
return new BazelStatusActionFactory();
}
}
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