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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.buildtool;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.analysis.BuildView.AnalysisResult;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.TargetAndConfiguration;
import com.google.devtools.build.lib.analysis.ViewCreationFailedException;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
import com.google.devtools.build.lib.analysis.config.BuildConfigurationCollection;
import com.google.devtools.build.lib.events.Event;
import com.google.devtools.build.lib.query2.ConfiguredTargetQueryEnvironment;
import com.google.devtools.build.lib.query2.TransitionsOutputFormatterCallback;
import com.google.devtools.build.lib.query2.engine.QueryEnvironment.QueryFunction;
import com.google.devtools.build.lib.query2.engine.QueryEvalResult;
import com.google.devtools.build.lib.query2.engine.QueryException;
import com.google.devtools.build.lib.query2.engine.QueryExpression;
import com.google.devtools.build.lib.query2.engine.TargetLiteral;
import com.google.devtools.build.lib.query2.engine.ThreadSafeOutputFormatterCallback;
import com.google.devtools.build.lib.query2.output.CqueryOptions;
import com.google.devtools.build.lib.query2.output.CqueryOptions.Transitions;
import com.google.devtools.build.lib.runtime.CommandEnvironment;
import com.google.devtools.build.lib.skyframe.SkyframeExecutorWrappingWalkableGraph;
import com.google.devtools.build.skyframe.WalkableGraph;
import java.io.IOException;
import java.util.List;
import java.util.stream.Collectors;
/** A version of {@link BuildTool} that handles all cquery work. */
public class CqueryBuildTool extends BuildTool {
private final QueryExpression queryExpression;
public CqueryBuildTool(CommandEnvironment env, QueryExpression queryExpression) {
super(env);
this.queryExpression = queryExpression;
}
@Override
protected void postProcessAnalysisResult(
BuildRequest request,
AnalysisResult analysisResult,
BuildConfigurationCollection configurations)
throws InterruptedException, ViewCreationFailedException,
ConfiguredTargetQueryCommandLineException {
// TODO: b/71905538 - this query will operate over the graph as constructed by analysis, but
// will also pick up any nodes that are in the graph from prior builds. This makes the results
// not reproducible at the level of a single command. Either tolerate, or wipe the analysis
// graph beforehand if this option is specified, or add another option to wipe if desired
// (SkyframeExecutor#handleConfiguredTargetChange should be sufficient).
if (queryExpression != null) {
if (!env.getSkyframeExecutor().tracksStateForIncrementality()) {
throw new ConfiguredTargetQueryCommandLineException(
"Configured query is not allowed if incrementality state is not being kept");
}
try {
doConfiguredTargetQuery(
request,
configurations.getHostConfiguration(),
analysisResult.getTopLevelTargetsWithConfigs(),
queryExpression);
} catch (QueryException | IOException e) {
if (!request.getKeepGoing()) {
throw new ViewCreationFailedException("Error doing configured target query", e);
}
env.getReporter().error(null, "Error doing configured target query", e);
}
}
}
private void doConfiguredTargetQuery(
BuildRequest request,
BuildConfiguration hostConfiguration,
List<TargetAndConfiguration> topLevelTargetsWithConfigs,
QueryExpression queryExpression)
throws InterruptedException, QueryException, IOException {
// Currently, CTQE assumes that all top level targets take on the same default config and we
// don't have the ability to map multiple configs to multiple top level targets.
// So for now, we only allow multiple targets when they all carry the same config.
// TODO: b/71508373 - fully support multiple top level targets
List<TargetAndConfiguration> nonNullTargets =
topLevelTargetsWithConfigs
.stream()
.filter(targetAndConfig -> targetAndConfig.getConfiguration() != null)
.collect(Collectors.toList());
BuildConfiguration targetConfig = null;
if (!nonNullTargets.isEmpty()) {
targetConfig = nonNullTargets.get(0).getConfiguration();
for (TargetAndConfiguration targAndConfig : topLevelTargetsWithConfigs) {
if (targAndConfig.getConfiguration() != null
&& !targAndConfig.getConfiguration().equals(targetConfig)) {
throw new QueryException(
new TargetLiteral(queryExpression.toString()),
String.format(
"Top-level targets %s and %s have different configurations (top-level "
+ "targets with different configurations is not supported)",
nonNullTargets.get(0).getLabel(), targAndConfig.getLabel()));
}
}
}
WalkableGraph walkableGraph =
SkyframeExecutorWrappingWalkableGraph.of(env.getSkyframeExecutor());
ImmutableList<QueryFunction> extraFunctions =
new ImmutableList.Builder<QueryFunction>()
.addAll(ConfiguredTargetQueryEnvironment.CQUERY_FUNCTIONS)
.addAll(env.getRuntime().getQueryFunctions())
.build();
CqueryOptions cqueryOptions = request.getOptions(CqueryOptions.class);
ConfiguredTargetQueryEnvironment configuredTargetQueryEnvironment =
new ConfiguredTargetQueryEnvironment(
request.getKeepGoing(),
env.getReporter(),
extraFunctions,
targetConfig,
hostConfiguration,
env.newTargetPatternEvaluator().getOffset(),
env.getPackageManager().getPackagePath(),
() -> walkableGraph,
cqueryOptions.toSettings());
CqueryOptions.Transitions transitions = cqueryOptions.transitions;
ThreadSafeOutputFormatterCallback<ConfiguredTarget> callback =
!transitions.equals(Transitions.NONE)
? new TransitionsOutputFormatterCallback(
configuredTargetQueryEnvironment.getAccessor(),
transitions,
env.getReporter().getOutErr().getOutputStream(),
env.getSkyframeExecutor(),
hostConfiguration)
: new ThreadSafeOutputFormatterCallback<ConfiguredTarget>() {
@Override
public void processOutput(Iterable<ConfiguredTarget> partialResult)
throws IOException, InterruptedException {
for (ConfiguredTarget configuredTarget : partialResult) {
BuildConfiguration config = configuredTarget.getConfiguration();
StringBuilder output =
new StringBuilder()
.append(
ConfiguredTargetQueryEnvironment.getCorrectLabel(configuredTarget))
.append(" (")
.append(config != null && config.isHostConfiguration() ? "HOST" : config)
.append(")");
env.getReporter().getOutErr().printOutLn(output.toString());
}
}
};
QueryEvalResult result =
configuredTargetQueryEnvironment.evaluateQuery(
queryExpression,
callback);
if (result.isEmpty()) {
env.getReporter().handle(Event.info("Empty query results"));
}
}
/** Cquery specific command line exception. */
protected static class ConfiguredTargetQueryCommandLineException extends Exception {
ConfiguredTargetQueryCommandLineException(String message) {
super(message);
}
}
}
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