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// 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.skylarkdebug.module;
import com.google.common.collect.ImmutableList;
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.Command;
import com.google.devtools.build.lib.runtime.CommandEnvironment;
import com.google.devtools.build.lib.skylarkdebug.server.SkylarkDebugServer;
import com.google.devtools.build.lib.syntax.DebugServerUtils;
import com.google.devtools.common.options.OptionsBase;
import java.io.IOException;
/** Blaze module for setting up Skylark debugging. */
public final class SkylarkDebuggerModule extends BlazeModule {
@Override
public void beforeCommand(CommandEnvironment env) {
// Conditionally enable debugging
SkylarkDebuggerOptions buildOptions = env.getOptions().getOptions(SkylarkDebuggerOptions.class);
boolean enabled = buildOptions != null && buildOptions.debugSkylark;
if (enabled) {
initializeDebugging(env.getReporter(), buildOptions.debugServerPort);
} else {
disableDebugging();
}
}
@Override
public void afterCommand() {
disableDebugging();
}
@Override
public Iterable<Class<? extends OptionsBase>> getCommandOptions(Command command) {
return "build".equals(command.name())
? ImmutableList.of(SkylarkDebuggerOptions.class)
: ImmutableList.of();
}
@Override
public void blazeShutdown() {
disableDebugging();
}
@Override
public void blazeShutdownOnCrash() {
disableDebugging();
}
private static void initializeDebugging(Reporter reporter, int debugPort) {
try {
SkylarkDebugServer server =
SkylarkDebugServer.createAndWaitForConnection(reporter, debugPort);
DebugServerUtils.initializeDebugServer(server);
} catch (IOException e) {
reporter.handle(Event.error("Error while setting up the debug server: " + e.getMessage()));
}
}
private static void disableDebugging() {
DebugServerUtils.disableDebugging();
}
}
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