| // Copyright 2018 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.bazel.debug; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.eventbus.EventBus; |
| import com.google.common.eventbus.Subscribe; |
| import com.google.devtools.build.lib.events.Event; |
| import com.google.devtools.build.lib.events.Reporter; |
| import com.google.devtools.build.lib.runtime.BlazeModule; |
| import com.google.devtools.build.lib.runtime.CommandEnvironment; |
| import com.google.devtools.build.lib.util.AbruptExitException; |
| import com.google.devtools.build.lib.util.ExitCode; |
| import com.google.devtools.build.lib.util.io.AsynchronousFileOutputStream; |
| import com.google.devtools.common.options.OptionsBase; |
| import java.io.IOException; |
| |
| /** A module for logging workspace rule events */ |
| public final class WorkspaceRuleModule extends BlazeModule { |
| private Reporter reporter; |
| private EventBus eventBus; |
| private AsynchronousFileOutputStream outFileStream; |
| |
| @Override |
| public void beforeCommand(CommandEnvironment env) { |
| reporter = env.getReporter(); |
| eventBus = env.getEventBus(); |
| |
| if (env.getOptions() == null || env.getOptions().getOptions(DebuggingOptions.class) == null) { |
| reporter.handle(Event.error("Installation is corrupt: could not retrieve debugging options")); |
| return; |
| } |
| |
| String logFile = env.getOptions().getOptions(DebuggingOptions.class).workspaceRulesLogFile; |
| if (logFile != null && !logFile.isEmpty()) { |
| try { |
| outFileStream = new AsynchronousFileOutputStream(logFile); |
| } catch (IOException e) { |
| env.getReporter().handle(Event.error(e.getMessage())); |
| env.getBlazeModuleEnvironment() |
| .exit( |
| new AbruptExitException( |
| "Error initializing workspace rule log file.", ExitCode.COMMAND_LINE_ERROR)); |
| } |
| eventBus.register(this); |
| } |
| } |
| |
| @Override |
| public void afterCommand() { |
| if (outFileStream != null) { |
| try { |
| outFileStream.close(); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } finally { |
| outFileStream = null; |
| } |
| } |
| } |
| |
| @Override |
| public Iterable<Class<? extends OptionsBase>> getCommonCommandOptions() { |
| return ImmutableList.<Class<? extends OptionsBase>>of(DebuggingOptions.class); |
| } |
| |
| @Subscribe |
| public void workspaceRuleEventReceived(WorkspaceRuleEvent event) { |
| if (outFileStream != null) { |
| outFileStream.write(event.getLogEvent()); |
| } |
| } |
| } |