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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.exec;
import com.google.common.collect.Iterables;
import com.google.devtools.build.lib.actions.AbstractAction;
import com.google.devtools.build.lib.actions.ActionExecutionContext;
import com.google.devtools.build.lib.actions.EnvironmentalExecException;
import com.google.devtools.build.lib.actions.ExecutionStrategy;
import com.google.devtools.build.lib.actions.RunningActionEvent;
import com.google.devtools.build.lib.actions.SpawnContinuation;
import com.google.devtools.build.lib.analysis.actions.AbstractFileWriteAction;
import com.google.devtools.build.lib.analysis.actions.AbstractFileWriteAction.DeterministicWriter;
import com.google.devtools.build.lib.analysis.actions.FileWriteActionContext;
import com.google.devtools.build.lib.profiler.AutoProfiler;
import com.google.devtools.build.lib.vfs.Path;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.logging.Logger;
/**
* A strategy for executing an {@link AbstractFileWriteAction}.
*/
@ExecutionStrategy(name = { "local" }, contextType = FileWriteActionContext.class)
public final class FileWriteStrategy implements FileWriteActionContext {
private static final Logger logger = Logger.getLogger(FileWriteStrategy.class.getName());
public static final Class<FileWriteStrategy> TYPE = FileWriteStrategy.class;
public FileWriteStrategy() {
}
@Override
public SpawnContinuation beginWriteOutputToFile(
AbstractAction action,
ActionExecutionContext actionExecutionContext,
DeterministicWriter deterministicWriter,
boolean makeExecutable,
boolean isRemotable) {
actionExecutionContext.getEventHandler().post(new RunningActionEvent(action, "local"));
// TODO(ulfjack): Consider acquiring local resources here before trying to write the file.
try (AutoProfiler p =
AutoProfiler.logged(
"running write for action " + action.prettyPrint(),
logger,
/*minTimeForLoggingInMilliseconds=*/ 100)) {
Path outputPath =
actionExecutionContext.getInputPath(Iterables.getOnlyElement(action.getOutputs()));
try {
try (OutputStream out = new BufferedOutputStream(outputPath.getOutputStream())) {
deterministicWriter.writeOutputFile(out);
}
if (makeExecutable) {
outputPath.setExecutable(true);
}
} catch (IOException e) {
return SpawnContinuation.failedWithExecException(new EnvironmentalExecException(e));
}
}
return SpawnContinuation.immediate();
}
}