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// Copyright 2017 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.runtime;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.base.Supplier;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
import com.google.devtools.build.lib.runtime.commands.InfoItem;
import com.google.devtools.build.lib.util.AbruptExitException;
import com.google.devtools.build.lib.util.LoggingUtil;
import com.google.devtools.build.lib.util.io.OutErr;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.common.options.OptionsProvider;
import java.io.IOException;
import java.io.OutputStream;
import java.util.logging.Level;
/** This module logs complete stdout / stderr output of Bazel to a local file. */
public class CommandLogModule extends BlazeModule {
private CommandEnvironment env;
private OutputStream logOutputStream;
@Override
public void serverInit(OptionsProvider startupOptions, ServerBuilder builder) {
builder.addInfoItems(new CommandLogInfoItem());
}
@Override
public void beforeCommand(CommandEnvironment env) {
this.env = env;
}
@Override
public OutErr getOutputListener() {
Path commandLog = getCommandLogPath(env.getOutputBase());
// Unlink old command log from previous build, if present.
try {
commandLog.delete();
} catch (IOException ioException) {
LoggingUtil.logToRemote(Level.WARNING, "Unable to delete command.log", ioException);
}
try {
if (writeCommandLog(env.getRuntime()) && !"clean".equals(env.getCommandName())) {
logOutputStream = commandLog.getOutputStream();
return OutErr.create(logOutputStream, logOutputStream);
}
} catch (IOException ioException) {
LoggingUtil.logToRemote(Level.WARNING, "Unable to delete or open command.log", ioException);
}
return null;
}
static boolean writeCommandLog(BlazeRuntime runtime) {
OptionsProvider startupOptionsProvider = runtime.getStartupOptionsProvider();
return startupOptionsProvider.getOptions(BlazeServerStartupOptions.class).writeCommandLog;
}
/**
* For a given output_base directory, returns the command log file path.
*/
static Path getCommandLogPath(Path outputBase) {
return outputBase.getRelative("command.log");
}
@Override
public void afterCommand() {
this.env = null;
if (logOutputStream != null) {
try {
logOutputStream.flush();
logOutputStream.close();
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
logOutputStream = null;
}
}
}
/**
* Info item for the command log
*/
public static final class CommandLogInfoItem extends InfoItem {
public CommandLogInfoItem() {
super("command_log",
"Location of the log containg the output from the build commands.",
false);
}
@Override
public byte[] get(Supplier<BuildConfiguration> configurationSupplier, CommandEnvironment env)
throws AbruptExitException {
checkNotNull(env);
return print(getCommandLogPath(env.getRuntime().getWorkspace().getOutputBase()));
}
}
}
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