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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.ActionExecutionContext;
import com.google.devtools.build.lib.actions.EnvironmentalExecException;
import com.google.devtools.build.lib.actions.ExecException;
import com.google.devtools.build.lib.actions.ExecutionStrategy;
import com.google.devtools.build.lib.actions.Executor;
import com.google.devtools.build.lib.actions.ResourceSet;
import com.google.devtools.build.lib.analysis.actions.AbstractFileWriteAction;
import com.google.devtools.build.lib.analysis.actions.FileWriteActionContext;
import com.google.devtools.build.lib.events.EventHandler;
import com.google.devtools.build.lib.profiler.AutoProfiler;
import com.google.devtools.build.lib.util.io.FileOutErr;
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 LOG = Logger.getLogger(FileWriteStrategy.class.getName());
public static final Class<FileWriteStrategy> TYPE = FileWriteStrategy.class;
public FileWriteStrategy() {
}
@Override
public void exec(Executor executor, AbstractFileWriteAction action, FileOutErr outErr,
ActionExecutionContext actionExecutionContext) throws ExecException, InterruptedException {
EventHandler reporter = executor == null ? null : executor.getEventHandler();
try (AutoProfiler p = AutoProfiler.logged("running " + action.prettyPrint(), LOG)) {
try {
Path outputPath = Iterables.getOnlyElement(action.getOutputs()).getPath();
try (OutputStream out = new BufferedOutputStream(outputPath.getOutputStream())) {
action.newDeterministicWriter(reporter, executor).writeOutputFile(out);
}
if (action.makeExecutable()) {
outputPath.setExecutable(true);
}
} catch (IOException e) {
throw new EnvironmentalExecException("failed to create file '"
+ Iterables.getOnlyElement(action.getOutputs()).prettyPrint()
+ "' due to I/O error: " + e.getMessage(), e);
}
}
}
@Override
public ResourceSet estimateResourceConsumption(AbstractFileWriteAction action) {
return action.estimateResourceConsumptionLocal();
}
@Override
public String strategyLocality(AbstractFileWriteAction action) {
return "local";
}
}
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