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This outputs rules as they would appear in BUILD files, except selects() are replaced with the actual paths that get chosen. More details: https://docs.bazel.build/versions/master/query.html#output-build RELNOTES[NEW]: cquery supports --output=build PiperOrigin-RevId: 246571183
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src/main/java/com/google/devtools/build/lib/query2/CqueryBuildOutputFormatterCallback.java
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| // Copyright 2019 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.query2; | ||
|
|
||
| import com.google.common.base.Verify; | ||
| import com.google.common.collect.ImmutableList; | ||
| import com.google.devtools.build.lib.analysis.ConfiguredTarget; | ||
| import com.google.devtools.build.lib.analysis.configuredtargets.OutputFileConfiguredTarget; | ||
| import com.google.devtools.build.lib.analysis.configuredtargets.RuleConfiguredTarget; | ||
| import com.google.devtools.build.lib.events.ExtendedEventHandler; | ||
| import com.google.devtools.build.lib.packages.Attribute; | ||
| import com.google.devtools.build.lib.packages.ConfiguredAttributeMapper; | ||
| import com.google.devtools.build.lib.packages.Rule; | ||
| import com.google.devtools.build.lib.packages.Target; | ||
| import com.google.devtools.build.lib.query2.engine.QueryEnvironment.TargetAccessor; | ||
| import com.google.devtools.build.lib.query2.output.BuildOutputFormatter; | ||
| import com.google.devtools.build.lib.query2.output.BuildOutputFormatter.AttributeReader; | ||
| import com.google.devtools.build.lib.query2.output.BuildOutputFormatter.TargetOutputter; | ||
| import com.google.devtools.build.lib.query2.output.CqueryOptions; | ||
| import com.google.devtools.build.lib.query2.output.OutputFormatter; | ||
| import com.google.devtools.build.lib.query2.output.OutputFormatter.PossibleAttributeValues; | ||
| import com.google.devtools.build.lib.rules.AliasConfiguredTarget; | ||
| import com.google.devtools.build.lib.skyframe.SkyframeExecutor; | ||
| import com.google.devtools.build.skyframe.BuildDriver; | ||
| import java.io.OutputStream; | ||
|
|
||
| /** Cquery implementation of BUILD-style output. */ | ||
| public class CqueryBuildOutputFormatterCallback extends CqueryThreadsafeCallback { | ||
| CqueryBuildOutputFormatterCallback( | ||
| ExtendedEventHandler eventHandler, | ||
| CqueryOptions options, | ||
| OutputStream out, | ||
| SkyframeExecutor<? extends BuildDriver> skyframeExecutor, | ||
| TargetAccessor<ConfiguredTarget> accessor) { | ||
| super(eventHandler, options, out, skyframeExecutor, accessor); | ||
| } | ||
|
|
||
| @Override | ||
| public String getName() { | ||
| return "build"; | ||
| } | ||
|
|
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| /** {@link AttributeReader} implementation that returns the exact value an attribute takes. */ | ||
| private static class CqueryAttributeReader implements AttributeReader { | ||
| private final ConfiguredAttributeMapper attributeMap; | ||
|
|
||
| CqueryAttributeReader(ConfiguredAttributeMapper attributeMap) { | ||
| this.attributeMap = attributeMap; | ||
| } | ||
|
|
||
| /** | ||
| * Cquery knows which select path is taken so it knows the exact value the attribute takes. Note | ||
| * that null values are also possible - these are represented as an empty value list. | ||
| */ | ||
| @Override | ||
| public PossibleAttributeValues getPossibleValues(Rule rule, Attribute attr) { | ||
| Object actualValue = attributeMap.get(attr.getName(), attr.getType()); | ||
| return new PossibleAttributeValues( | ||
| actualValue == null ? ImmutableList.of() : ImmutableList.of(actualValue), | ||
| OutputFormatter.getAttributeSource(rule, attr)); | ||
| } | ||
| } | ||
|
|
||
| private ConfiguredAttributeMapper getAttributeMap(ConfiguredTarget ct) | ||
| throws InterruptedException { | ||
| Rule associatedRule = accessor.getTargetFromConfiguredTarget(ct).getAssociatedRule(); | ||
| if (associatedRule == null) { | ||
| return null; | ||
| } else if (ct instanceof AliasConfiguredTarget) { | ||
| return ConfiguredAttributeMapper.of( | ||
| associatedRule, ((AliasConfiguredTarget) ct).getConfigConditions()); | ||
| } else if (ct instanceof OutputFileConfiguredTarget) { | ||
| return ConfiguredAttributeMapper.of( | ||
| associatedRule, | ||
| accessor | ||
| .getGeneratingConfiguredTarget((OutputFileConfiguredTarget) ct) | ||
| .getConfigConditions()); | ||
| } else { | ||
| Verify.verify(ct instanceof RuleConfiguredTarget); | ||
| return ConfiguredAttributeMapper.of( | ||
| associatedRule, ((RuleConfiguredTarget) ct).getConfigConditions()); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void processOutput(Iterable<ConfiguredTarget> partialResult) throws InterruptedException { | ||
| BuildOutputFormatter.TargetOutputter outputter = | ||
| new TargetOutputter( | ||
| printStream, | ||
| // This tells TargetOutputter which attributes to print as selects without resolving | ||
| // those selects. For cquery we never have to do this since we can always resolve | ||
| // selects. Going forward we could expand this to show both the complete select | ||
| // and which path is chosen, which people may find even more informative. | ||
| (rule, attr) -> false, | ||
| System.lineSeparator()); | ||
| for (ConfiguredTarget configuredTarget : partialResult) { | ||
| Target target = accessor.getTargetFromConfiguredTarget(configuredTarget); | ||
| outputter.output(target, new CqueryAttributeReader(getAttributeMap(configuredTarget))); | ||
| } | ||
| } | ||
| } |
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