| // Copyright 2015 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.skyframe; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.devtools.build.lib.analysis.AspectValue; |
| import com.google.devtools.build.lib.analysis.ConfiguredTargetValue; |
| import com.google.devtools.build.lib.packages.AspectDescriptor; |
| import com.google.devtools.build.lib.skyframe.AspectKeyCreator.AspectKey; |
| import com.google.devtools.build.lib.skyframe.AspectKeyCreator.TopLevelAspectsKey; |
| import com.google.devtools.build.lib.skyframe.BuildTopLevelAspectsDetailsFunction.AspectDetails; |
| import com.google.devtools.build.lib.skyframe.BuildTopLevelAspectsDetailsFunction.BuildTopLevelAspectsDetailsKey; |
| import com.google.devtools.build.lib.skyframe.BuildTopLevelAspectsDetailsFunction.BuildTopLevelAspectsDetailsValue; |
| import com.google.devtools.build.lib.skyframe.config.BuildConfigurationKey; |
| import com.google.devtools.build.skyframe.SkyFunction; |
| import com.google.devtools.build.skyframe.SkyKey; |
| import com.google.devtools.build.skyframe.SkyValue; |
| import com.google.devtools.build.skyframe.SkyframeLookupResult; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Objects; |
| import javax.annotation.Nullable; |
| |
| /** |
| * SkyFunction to run the aspects path obtained from top-level aspects on the list of top-level |
| * targets. |
| * |
| * <p>Used for loading top-level aspects. At top level, in {@link |
| * com.google.devtools.build.lib.analysis.BuildView}, we cannot invoke two SkyFunctions one after |
| * another, so BuildView calls this function to do the work. |
| */ |
| final class ToplevelStarlarkAspectFunction implements SkyFunction { |
| @Nullable |
| @Override |
| public SkyValue compute(SkyKey skyKey, Environment env) throws InterruptedException { |
| TopLevelAspectsKey topLevelAspectsKey = (TopLevelAspectsKey) skyKey.argument(); |
| |
| BuildTopLevelAspectsDetailsKey topLevelAspectsDetailsKey = |
| BuildTopLevelAspectsDetailsKey.create( |
| topLevelAspectsKey.getTopLevelAspectsClasses(), |
| topLevelAspectsKey.getTopLevelAspectsParameters()); |
| ConfiguredTargetKey baseConfiguredTargetKey = topLevelAspectsKey.getBaseConfiguredTargetKey(); |
| |
| SkyframeLookupResult initialLookupResult = |
| env.getValuesAndExceptions( |
| ImmutableList.of(topLevelAspectsDetailsKey, baseConfiguredTargetKey)); |
| var topLevelAspectsDetails = |
| (BuildTopLevelAspectsDetailsValue) initialLookupResult.get(topLevelAspectsDetailsKey); |
| if (topLevelAspectsDetails == null) { |
| return null; // some aspects details are not ready |
| } |
| var baseConfiguredTargetValue = |
| (ConfiguredTargetValue) initialLookupResult.get(baseConfiguredTargetKey); |
| if (baseConfiguredTargetValue == null) { |
| return null; |
| } |
| |
| // Keeps AspectKeys canonical by ensuring that they use the real configuration for the base |
| // configured target key. The ConfiguredTargetFunction could modify it using a rule transition. |
| BuildConfigurationKey realConfiguration = |
| baseConfiguredTargetValue.getConfiguredTarget().getConfigurationKey(); |
| if (!Objects.equals(realConfiguration, baseConfiguredTargetKey.getConfigurationKey())) { |
| baseConfiguredTargetKey = |
| ConfiguredTargetKey.fromConfiguredTarget(baseConfiguredTargetValue.getConfiguredTarget()); |
| } |
| |
| Collection<AspectKey> aspectsKeys = |
| getTopLevelAspectsKeys(topLevelAspectsDetails.getAspectsDetails(), baseConfiguredTargetKey); |
| |
| SkyframeLookupResult result = env.getValuesAndExceptions(aspectsKeys); |
| if (env.valuesMissing()) { |
| return null; // some aspects keys are not evaluated |
| } |
| ImmutableMap.Builder<AspectKey, AspectValue> valuesMap = |
| ImmutableMap.builderWithExpectedSize(aspectsKeys.size()); |
| for (AspectKey aspectKey : aspectsKeys) { |
| AspectValue value = (AspectValue) result.get(aspectKey); |
| if (value == null) { |
| return null; |
| } |
| valuesMap.put(aspectKey, value); |
| } |
| return new TopLevelAspectsValue(valuesMap.buildOrThrow()); |
| } |
| |
| private static Collection<AspectKey> getTopLevelAspectsKeys( |
| ImmutableList<AspectDetails> aspectsDetails, ConfiguredTargetKey topLevelTargetKey) { |
| Map<AspectDescriptor, AspectKey> result = new HashMap<>(); |
| for (AspectDetails aspect : aspectsDetails) { |
| buildAspectKey(aspect, result, topLevelTargetKey); |
| } |
| return result.values(); |
| } |
| |
| private static AspectKey buildAspectKey( |
| AspectDetails aspect, |
| Map<AspectDescriptor, AspectKey> result, |
| ConfiguredTargetKey topLevelTargetKey) { |
| if (result.containsKey(aspect.getAspectDescriptor())) { |
| return result.get(aspect.getAspectDescriptor()); |
| } |
| |
| ImmutableList.Builder<AspectKey> dependentAspects = ImmutableList.builder(); |
| for (AspectDetails depAspect : aspect.getUsedAspects()) { |
| dependentAspects.add(buildAspectKey(depAspect, result, topLevelTargetKey)); |
| } |
| |
| AspectKey aspectKey = |
| AspectKeyCreator.createAspectKey( |
| aspect.getAspectDescriptor(), |
| dependentAspects.build(), |
| topLevelTargetKey); |
| result.put(aspectKey.getAspectDescriptor(), aspectKey); |
| return aspectKey; |
| } |
| } |