| // Copyright 2014 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 static com.google.common.collect.ImmutableList.toImmutableList; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.base.Predicates; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Lists; |
| import com.google.devtools.build.lib.actions.MutableActionGraph.ActionConflictException; |
| import com.google.devtools.build.lib.analysis.AliasProvider; |
| import com.google.devtools.build.lib.analysis.AspectResolver; |
| import com.google.devtools.build.lib.analysis.AspectValue; |
| import com.google.devtools.build.lib.analysis.CachingAnalysisEnvironment; |
| import com.google.devtools.build.lib.analysis.CachingAnalysisEnvironment.MissingDepException; |
| import com.google.devtools.build.lib.analysis.ConfiguredAspect; |
| import com.google.devtools.build.lib.analysis.ConfiguredAspectFactory; |
| import com.google.devtools.build.lib.analysis.ConfiguredRuleClassProvider; |
| import com.google.devtools.build.lib.analysis.ConfiguredTarget; |
| import com.google.devtools.build.lib.analysis.ConfiguredTargetValue; |
| import com.google.devtools.build.lib.analysis.Dependency; |
| import com.google.devtools.build.lib.analysis.DependencyKey; |
| import com.google.devtools.build.lib.analysis.DependencyKind; |
| import com.google.devtools.build.lib.analysis.DuplicateException; |
| import com.google.devtools.build.lib.analysis.ExecGroupCollection; |
| import com.google.devtools.build.lib.analysis.ExecGroupCollection.InvalidExecGroupException; |
| import com.google.devtools.build.lib.analysis.IncompatiblePlatformProvider; |
| import com.google.devtools.build.lib.analysis.InconsistentAspectOrderException; |
| import com.google.devtools.build.lib.analysis.ResolvedToolchainContext; |
| import com.google.devtools.build.lib.analysis.TargetAndConfiguration; |
| import com.google.devtools.build.lib.analysis.ToolchainCollection; |
| import com.google.devtools.build.lib.analysis.config.BuildConfigurationValue; |
| import com.google.devtools.build.lib.analysis.config.ConfigConditions; |
| import com.google.devtools.build.lib.analysis.config.ConfigurationResolver; |
| import com.google.devtools.build.lib.analysis.config.DependencyEvaluationException; |
| import com.google.devtools.build.lib.analysis.config.InvalidConfigurationException; |
| import com.google.devtools.build.lib.analysis.config.TransitionResolver; |
| import com.google.devtools.build.lib.analysis.config.transitions.ConfigurationTransition; |
| import com.google.devtools.build.lib.analysis.config.transitions.NoTransition; |
| import com.google.devtools.build.lib.analysis.configuredtargets.MergedConfiguredTarget; |
| import com.google.devtools.build.lib.analysis.starlark.StarlarkTransition.TransitionException; |
| import com.google.devtools.build.lib.bugreport.BugReport; |
| import com.google.devtools.build.lib.causes.Cause; |
| import com.google.devtools.build.lib.causes.LabelCause; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.collect.nestedset.NestedSet; |
| import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder; |
| import com.google.devtools.build.lib.collect.nestedset.Order; |
| import com.google.devtools.build.lib.events.Event; |
| import com.google.devtools.build.lib.events.StoredEventHandler; |
| import com.google.devtools.build.lib.packages.Aspect; |
| import com.google.devtools.build.lib.packages.Attribute; |
| import com.google.devtools.build.lib.packages.BuildFileContainsErrorsException; |
| import com.google.devtools.build.lib.packages.NativeAspectClass; |
| import com.google.devtools.build.lib.packages.NoSuchPackageException; |
| import com.google.devtools.build.lib.packages.NoSuchTargetException; |
| import com.google.devtools.build.lib.packages.NoSuchThingException; |
| import com.google.devtools.build.lib.packages.OutputFile; |
| import com.google.devtools.build.lib.packages.Package; |
| import com.google.devtools.build.lib.packages.Rule; |
| import com.google.devtools.build.lib.packages.RuleClassProvider; |
| import com.google.devtools.build.lib.packages.StarlarkAspectClass; |
| import com.google.devtools.build.lib.packages.StarlarkDefinedAspect; |
| import com.google.devtools.build.lib.packages.Target; |
| import com.google.devtools.build.lib.packages.semantics.BuildLanguageOptions; |
| import com.google.devtools.build.lib.profiler.memory.CurrentRuleTracker; |
| import com.google.devtools.build.lib.skyframe.AspectKeyCreator.AspectKey; |
| import com.google.devtools.build.lib.skyframe.BzlLoadFunction.BzlLoadFailedException; |
| import com.google.devtools.build.lib.skyframe.ConfiguredTargetFunction.ComputeDependenciesState; |
| import com.google.devtools.build.lib.skyframe.ConfiguredTargetFunction.ComputedToolchainContexts; |
| import com.google.devtools.build.lib.skyframe.SkyframeExecutor.BuildViewProvider; |
| import com.google.devtools.build.lib.util.OrderedSetMultimap; |
| import com.google.devtools.build.skyframe.SkyFunction; |
| import com.google.devtools.build.skyframe.SkyFunction.Environment.SkyKeyComputeState; |
| import com.google.devtools.build.skyframe.SkyFunctionException; |
| import com.google.devtools.build.skyframe.SkyKey; |
| import com.google.devtools.build.skyframe.SkyValue; |
| import com.google.devtools.build.skyframe.SkyframeLookupResult; |
| import java.util.LinkedHashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| import javax.annotation.Nullable; |
| import net.starlark.java.eval.StarlarkSemantics; |
| |
| /** |
| * The Skyframe function that generates aspects. |
| * |
| * <p>This class, together with {@link ConfiguredTargetFunction} drives the analysis phase. For more |
| * information, see {@link com.google.devtools.build.lib.analysis.RuleConfiguredTargetFactory}. |
| * |
| * <p>{@link AspectFunction} takes a SkyKey containing an {@link AspectKey} [a tuple of (target |
| * label, configurations, aspect class and aspect parameters)], loads an {@link Aspect} from aspect |
| * class and aspect parameters, gets a {@link ConfiguredTarget} for label and configurations, and |
| * then creates a {@link ConfiguredAspect} for a given {@link AspectKey}. |
| * |
| * <p>See {@link com.google.devtools.build.lib.packages.AspectClass} documentation for an overview |
| * of aspect-related classes |
| * |
| * @see com.google.devtools.build.lib.analysis.RuleConfiguredTargetFactory |
| * @see com.google.devtools.build.lib.packages.AspectClass |
| */ |
| final class AspectFunction implements SkyFunction { |
| private final BuildViewProvider buildViewProvider; |
| private final RuleClassProvider ruleClassProvider; |
| /** |
| * Indicates whether the set of packages transitively loaded for a given {@link AspectValue} will |
| * be needed later (see {@link |
| * com.google.devtools.build.lib.analysis.ConfiguredObjectValue#getTransitivePackages}). If not, |
| * they are not collected and stored. |
| */ |
| private final boolean storeTransitivePackages; |
| |
| AspectFunction( |
| BuildViewProvider buildViewProvider, |
| RuleClassProvider ruleClassProvider, |
| boolean storeTransitivePackages) { |
| this.buildViewProvider = buildViewProvider; |
| this.ruleClassProvider = ruleClassProvider; |
| this.storeTransitivePackages = storeTransitivePackages; |
| } |
| |
| static class State implements SkyKeyComputeState { |
| /** Null if AspectFuncton is not storing this information. */ |
| @Nullable NestedSetBuilder<Package> transitivePackages; |
| |
| NestedSetBuilder<Cause> transitiveRootCauses = NestedSetBuilder.stableOrder(); |
| |
| @Nullable InitialValues initialValues; |
| |
| ComputeDependenciesState computeDependenciesState = new ComputeDependenciesState(); |
| |
| State(boolean storeTransitivePackages) { |
| this.transitivePackages = storeTransitivePackages ? NestedSetBuilder.stableOrder() : null; |
| } |
| } |
| |
| private static class InitialValues { |
| @Nullable private final Aspect aspect; |
| @Nullable private final ConfiguredAspectFactory aspectFactory; |
| @Nullable private final BuildConfigurationValue configuration; |
| private final ConfiguredTarget associatedTarget; |
| private final Target target; |
| |
| private InitialValues( |
| @Nullable Aspect aspect, |
| @Nullable ConfiguredAspectFactory aspectFactory, |
| @Nullable BuildConfigurationValue configuration, |
| ConfiguredTarget associatedTarget, |
| Target target) { |
| this.aspect = aspect; |
| this.aspectFactory = aspectFactory; |
| this.configuration = configuration; |
| this.associatedTarget = associatedTarget; |
| this.target = target; |
| } |
| } |
| |
| @Nullable |
| @Override |
| public SkyValue compute(SkyKey skyKey, Environment env) |
| throws AspectFunctionException, InterruptedException { |
| AspectKey key = (AspectKey) skyKey.argument(); |
| State state = env.getState(() -> new State(storeTransitivePackages)); |
| |
| if (state.initialValues == null) { |
| InitialValues initialValues = getInitialValues(key, env); |
| if (initialValues == null) { |
| return null; |
| } |
| state.initialValues = initialValues; |
| } |
| Aspect aspect = state.initialValues.aspect; |
| ConfiguredAspectFactory aspectFactory = state.initialValues.aspectFactory; |
| BuildConfigurationValue configuration = state.initialValues.configuration; |
| ConfiguredTarget associatedTarget = state.initialValues.associatedTarget; |
| Target target = state.initialValues.target; |
| |
| // If the target is incompatible, then there's not much to do. The intent here is to create an |
| // AspectValue that doesn't trigger any of the associated target's dependencies to be evaluated |
| // against this aspect. |
| if (associatedTarget.get(IncompatiblePlatformProvider.PROVIDER) != null) { |
| return new AspectValue( |
| key, |
| aspect, |
| target.getLocation(), |
| ConfiguredAspect.forNonapplicableTarget(), |
| state.transitivePackages == null ? null : state.transitivePackages.build()); |
| } |
| |
| if (AliasProvider.isAlias(associatedTarget)) { |
| return createAliasAspect( |
| env, |
| new TargetAndConfiguration(target, configuration), |
| aspect, |
| key, |
| configuration, |
| associatedTarget); |
| } |
| // If we get here, label should match original label, and therefore the target we looked up |
| // above indeed corresponds to associatedTarget.getLabel(). |
| Preconditions.checkState( |
| associatedTarget.getOriginalLabel().equals(associatedTarget.getLabel()), |
| "Non-alias %s should have matching label but found %s", |
| associatedTarget.getOriginalLabel(), |
| associatedTarget.getLabel()); |
| |
| // If the incompatible flag is set, the top-level aspect should not be applied on top-level |
| // targets whose rules do not advertise the aspect's required providers. The aspect should not |
| // also propagate to these targets dependencies. |
| StarlarkSemantics starlarkSemantics = PrecomputedValue.STARLARK_SEMANTICS.get(env); |
| if (starlarkSemantics == null) { |
| return null; |
| } |
| boolean checkRuleAdvertisedProviders = |
| starlarkSemantics.getBool( |
| BuildLanguageOptions.INCOMPATIBLE_TOP_LEVEL_ASPECTS_REQUIRE_PROVIDERS); |
| if (checkRuleAdvertisedProviders) { |
| if (target instanceof Rule) { |
| if (!aspect |
| .getDefinition() |
| .getRequiredProviders() |
| .isSatisfiedBy(((Rule) target).getRuleClassObject().getAdvertisedProviders())) { |
| return new AspectValue( |
| key, |
| aspect, |
| target.getLocation(), |
| ConfiguredAspect.forNonapplicableTarget(), |
| /*transitivePackages=*/ NestedSetBuilder.emptySet(Order.STABLE_ORDER)); |
| } |
| } |
| } |
| |
| ImmutableList<Aspect> topologicalAspectPath; |
| if (key.getBaseKeys().isEmpty()) { |
| topologicalAspectPath = ImmutableList.of(aspect); |
| } else { |
| LinkedHashSet<AspectKey> orderedKeys = new LinkedHashSet<>(); |
| collectAspectKeysInTopologicalOrder(key.getBaseKeys(), orderedKeys); |
| SkyframeLookupResult aspectValues = env.getValuesAndExceptions(orderedKeys); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| ImmutableList.Builder<Aspect> topologicalAspectPathBuilder = |
| ImmutableList.builderWithExpectedSize(orderedKeys.size() + 1); |
| for (AspectKey aspectKey : orderedKeys) { |
| AspectValue aspectValue = (AspectValue) aspectValues.get(aspectKey); |
| if (aspectValue == null) { |
| BugReport.logUnexpected( |
| "aspectValue for: '%s' was missing, this should never happen", aspectKey); |
| return null; |
| } |
| topologicalAspectPathBuilder.add(aspectValue.getAspect()); |
| } |
| topologicalAspectPath = topologicalAspectPathBuilder.add(aspect).build(); |
| |
| List<ConfiguredAspect> directlyRequiredAspects = |
| Lists.transform( |
| key.getBaseKeys(), k -> ((AspectValue) aspectValues.get(k)).getConfiguredAspect()); |
| try { |
| associatedTarget = MergedConfiguredTarget.of(associatedTarget, directlyRequiredAspects); |
| } catch (DuplicateException e) { |
| env.getListener().handle(Event.error(target.getLocation(), e.getMessage())); |
| throw new AspectFunctionException( |
| new AspectCreationException(e.getMessage(), target.getLabel(), configuration)); |
| } |
| } |
| |
| SkyframeDependencyResolver resolver = new SkyframeDependencyResolver(env); |
| |
| TargetAndConfiguration originalTargetAndConfiguration = |
| new TargetAndConfiguration(target, configuration); |
| try { |
| ConfiguredTargetFunction.ComputedToolchainContexts computedToolchainContexts = |
| getUnloadedToolchainContexts(env, key, aspect, configuration); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| |
| ToolchainCollection<UnloadedToolchainContext> unloadedToolchainContexts = null; |
| ExecGroupCollection.Builder execGroupCollectionBuilder = null; |
| if (computedToolchainContexts != null) { |
| unloadedToolchainContexts = computedToolchainContexts.toolchainCollection; |
| execGroupCollectionBuilder = computedToolchainContexts.execGroupCollectionBuilder; |
| } |
| |
| // Get the configuration targets that trigger this rule's configurable attributes. |
| ConfigConditions configConditions = |
| ConfiguredTargetFunction.getConfigConditions( |
| env, |
| originalTargetAndConfiguration, |
| state.transitivePackages, |
| unloadedToolchainContexts == null |
| ? null |
| : unloadedToolchainContexts.getTargetPlatform(), |
| state.transitiveRootCauses); |
| if (configConditions == null) { |
| // Those targets haven't yet been resolved. |
| return null; |
| } |
| |
| OrderedSetMultimap<DependencyKind, ConfiguredTargetAndData> depValueMap; |
| try { |
| depValueMap = |
| ConfiguredTargetFunction.computeDependencies( |
| state.computeDependenciesState, |
| state.transitivePackages, |
| state.transitiveRootCauses, |
| env, |
| resolver, |
| originalTargetAndConfiguration, |
| topologicalAspectPath, |
| configConditions.asProviders(), |
| unloadedToolchainContexts == null |
| ? null |
| : unloadedToolchainContexts.asToolchainContexts(), |
| ruleClassProvider, |
| buildViewProvider.getSkyframeBuildView()); |
| } catch (ConfiguredValueCreationException e) { |
| throw new AspectCreationException( |
| e.getMessage(), key.getLabel(), configuration, e.getDetailedExitCode()); |
| } |
| if (depValueMap == null) { |
| return null; |
| } |
| if (!state.transitiveRootCauses.isEmpty()) { |
| NestedSet<Cause> causes = state.transitiveRootCauses.build(); |
| throw new AspectFunctionException( |
| new AspectCreationException( |
| "Loading failed", |
| causes, |
| ConfiguredTargetFunction.getPrioritizedDetailedExitCode(causes))); |
| } |
| |
| // Load the requested toolchains into the ToolchainContext, now that we have dependencies. |
| ToolchainCollection<ResolvedToolchainContext> toolchainContexts = null; |
| if (unloadedToolchainContexts != null) { |
| String targetDescription = |
| String.format( |
| "aspect %s applied to %s", aspect.getDescriptor().getDescription(), target); |
| ToolchainCollection.Builder<ResolvedToolchainContext> contextsBuilder = |
| ToolchainCollection.builder(); |
| for (Map.Entry<String, UnloadedToolchainContext> unloadedContext : |
| unloadedToolchainContexts.getContextMap().entrySet()) { |
| Set<ConfiguredTargetAndData> toolchainDependencies = |
| depValueMap.get(DependencyKind.forExecGroup(unloadedContext.getKey())); |
| contextsBuilder.addContext( |
| unloadedContext.getKey(), |
| ResolvedToolchainContext.load( |
| unloadedContext.getValue(), targetDescription, toolchainDependencies)); |
| } |
| toolchainContexts = contextsBuilder.build(); |
| } |
| |
| return createAspect( |
| env, |
| key, |
| topologicalAspectPath, |
| aspect, |
| aspectFactory, |
| new ConfiguredTargetAndData( |
| associatedTarget, target, configuration, /*transitionKeys=*/ null), |
| configuration, |
| configConditions, |
| toolchainContexts, |
| execGroupCollectionBuilder, |
| depValueMap, |
| state.transitivePackages); |
| } catch (DependencyEvaluationException e) { |
| // TODO(bazel-team): consolidate all env.getListener().handle() calls in this method, like in |
| // ConfiguredTargetFunction. This encourages clear, consistent user messages (ideally without |
| // the programmer having to think about it). |
| if (!e.depReportedOwnError()) { |
| env.getListener().handle(Event.error(e.getLocation(), e.getMessage())); |
| } |
| if (e.getCause() instanceof ConfiguredValueCreationException) { |
| ConfiguredValueCreationException cause = (ConfiguredValueCreationException) e.getCause(); |
| throw new AspectFunctionException( |
| new AspectCreationException( |
| cause.getMessage(), cause.getRootCauses(), cause.getDetailedExitCode())); |
| } else if (e.getCause() instanceof InconsistentAspectOrderException) { |
| InconsistentAspectOrderException cause = (InconsistentAspectOrderException) e.getCause(); |
| env.getListener().handle(Event.error(cause.getLocation(), cause.getMessage())); |
| throw new AspectFunctionException( |
| new AspectCreationException(cause.getMessage(), key.getLabel(), configuration)); |
| } else if (e.getCause() instanceof TransitionException) { |
| TransitionException cause = (TransitionException) e.getCause(); |
| throw new AspectFunctionException( |
| new AspectCreationException(cause.getMessage(), key.getLabel(), configuration)); |
| } else { |
| // Cast to InvalidConfigurationException as a consistency check. If you add any |
| // DependencyEvaluationException constructors, you may need to change this code, too. |
| InvalidConfigurationException cause = (InvalidConfigurationException) e.getCause(); |
| throw new AspectFunctionException( |
| new AspectCreationException( |
| cause.getMessage(), key.getLabel(), configuration, cause.getDetailedExitCode())); |
| } |
| } catch (AspectCreationException e) { |
| throw new AspectFunctionException(e); |
| } catch (ConfiguredValueCreationException e) { |
| throw new AspectFunctionException(e); |
| } catch (ToolchainException e) { |
| throw new AspectFunctionException( |
| new AspectCreationException( |
| e.getMessage(), new LabelCause(key.getLabel(), e.getDetailedExitCode()))); |
| } |
| } |
| |
| static BzlLoadValue.Key bzlLoadKeyForStarlarkAspect(StarlarkAspectClass starlarkAspectClass) { |
| Label extensionLabel = starlarkAspectClass.getExtensionLabel(); |
| return StarlarkBuiltinsValue.isBuiltinsRepo(extensionLabel.getRepository()) |
| ? BzlLoadValue.keyForBuiltins(extensionLabel) |
| : BzlLoadValue.keyForBuild(extensionLabel); |
| } |
| |
| @Nullable |
| private static InitialValues getInitialValues(AspectKey key, Environment env) |
| throws AspectFunctionException, InterruptedException { |
| StarlarkAspectClass starlarkAspectClass; |
| ConfiguredAspectFactory aspectFactory = null; |
| Aspect aspect = null; |
| |
| SkyKey aspectPackageKey = PackageValue.key(key.getLabel().getPackageIdentifier()); |
| SkyKey baseConfiguredTargetKey = key.getBaseConfiguredTargetKey(); |
| SkyKey basePackageKey = |
| PackageValue.key(key.getBaseConfiguredTargetKey().getLabel().getPackageIdentifier()); |
| SkyKey configurationKey = key.getConfigurationKey(); |
| BzlLoadValue.Key bzlLoadKey; |
| |
| if (key.getAspectClass() instanceof NativeAspectClass) { |
| NativeAspectClass nativeAspectClass = (NativeAspectClass) key.getAspectClass(); |
| starlarkAspectClass = null; |
| aspectFactory = (ConfiguredAspectFactory) nativeAspectClass; |
| aspect = Aspect.forNative(nativeAspectClass, key.getParameters()); |
| bzlLoadKey = null; |
| } else { |
| Preconditions.checkState( |
| key.getAspectClass() instanceof StarlarkAspectClass, "Unknown aspect class: %s", key); |
| starlarkAspectClass = (StarlarkAspectClass) key.getAspectClass(); |
| bzlLoadKey = bzlLoadKeyForStarlarkAspect(starlarkAspectClass); |
| } |
| |
| ImmutableSet.Builder<SkyKey> initialKeys = ImmutableSet.builder(); |
| initialKeys.add(aspectPackageKey).add(baseConfiguredTargetKey).add(basePackageKey); |
| if (configurationKey != null) { |
| initialKeys.add(configurationKey); |
| } |
| if (bzlLoadKey != null) { |
| initialKeys.add(bzlLoadKey); |
| } |
| SkyframeLookupResult initialValues = env.getValuesAndExceptions(initialKeys.build()); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| |
| if (starlarkAspectClass != null) { |
| StarlarkDefinedAspect starlarkAspect; |
| try { |
| BzlLoadValue bzlLoadvalue; |
| try { |
| bzlLoadvalue = |
| (BzlLoadValue) initialValues.getOrThrow(bzlLoadKey, BzlLoadFailedException.class); |
| if (bzlLoadvalue == null) { |
| BugReport.logUnexpected( |
| "Unexpected exception with %s and AspectKey %s", bzlLoadKey, key); |
| return null; |
| } |
| } catch (BzlLoadFailedException e) { |
| throw new AspectCreationException( |
| e.getMessage(), starlarkAspectClass.getExtensionLabel(), e.getDetailedExitCode()); |
| } |
| starlarkAspect = loadAspectFromBzl(starlarkAspectClass, bzlLoadvalue); |
| } catch (AspectCreationException e) { |
| env.getListener().handle(Event.error(e.getMessage())); |
| throw new AspectFunctionException(e); |
| } |
| aspectFactory = new StarlarkAspectFactory(starlarkAspect); |
| aspect = |
| Aspect.forStarlark( |
| starlarkAspect.getAspectClass(), |
| starlarkAspect.getDefinition(key.getParameters()), |
| key.getParameters()); |
| } |
| |
| // Keep this in sync with the same code in ConfiguredTargetFunction. |
| PackageValue aspectPackage = (PackageValue) initialValues.get(aspectPackageKey); |
| if (aspectPackage.getPackage().containsErrors()) { |
| throw new AspectFunctionException( |
| new BuildFileContainsErrorsException(key.getLabel().getPackageIdentifier())); |
| } |
| |
| ConfiguredTargetValue baseConfiguredTargetValue; |
| try { |
| baseConfiguredTargetValue = |
| (ConfiguredTargetValue) |
| initialValues.getOrThrow( |
| baseConfiguredTargetKey, ConfiguredValueCreationException.class); |
| if (baseConfiguredTargetValue == null) { |
| BugReport.logUnexpected( |
| "Unexpected exception with %s and AspectKey %s", baseConfiguredTargetKey, key); |
| return null; |
| } |
| } catch (ConfiguredValueCreationException e) { |
| throw new AspectFunctionException( |
| new AspectCreationException(e.getMessage(), e.getRootCauses(), e.getDetailedExitCode())); |
| } |
| |
| ConfiguredTarget associatedTarget = baseConfiguredTargetValue.getConfiguredTarget(); |
| Preconditions.checkState( |
| Objects.equals(key.getConfigurationKey(), associatedTarget.getConfigurationKey()), |
| "Aspect not in same configuration as associated target: %s, %s", |
| key, |
| associatedTarget); |
| |
| BuildConfigurationValue configuration = |
| configurationKey == null |
| ? null |
| : (BuildConfigurationValue) initialValues.get(configurationKey); |
| |
| PackageValue basePackage = (PackageValue) initialValues.get(basePackageKey); |
| Target target; |
| try { |
| target = basePackage.getPackage().getTarget(associatedTarget.getOriginalLabel().getName()); |
| } catch (NoSuchTargetException e) { |
| throw new IllegalStateException("Name already verified", e); |
| } |
| |
| return new InitialValues(aspect, aspectFactory, configuration, associatedTarget, target); |
| } |
| |
| /** |
| * Loads a Starlark-defined aspect from an extension file. |
| * |
| * @throws AspectCreationException if the value loaded is not a {@link StarlarkDefinedAspect} |
| */ |
| static StarlarkDefinedAspect loadAspectFromBzl( |
| StarlarkAspectClass starlarkAspectClass, BzlLoadValue bzlLoadValue) |
| throws AspectCreationException { |
| Label extensionLabel = starlarkAspectClass.getExtensionLabel(); |
| String starlarkValueName = starlarkAspectClass.getExportedName(); |
| Object starlarkValue = bzlLoadValue.getModule().getGlobal(starlarkValueName); |
| if (!(starlarkValue instanceof StarlarkDefinedAspect)) { |
| throw new AspectCreationException( |
| String.format( |
| starlarkValue == null ? "%s is not exported from %s" : "%s from %s is not an aspect", |
| starlarkValueName, |
| extensionLabel), |
| extensionLabel); |
| } |
| return (StarlarkDefinedAspect) starlarkValue; |
| } |
| |
| @Nullable |
| private static ComputedToolchainContexts getUnloadedToolchainContexts( |
| Environment env, |
| AspectKey key, |
| Aspect aspect, |
| @Nullable BuildConfigurationValue configuration) |
| throws InterruptedException, AspectCreationException { |
| if (configuration == null) { |
| // Configuration can be null in the case of aspects applied to input files. In this case, |
| // there are no chances of toolchains being used, so skip it. |
| return null; |
| } |
| // Determine what toolchains are needed by this target. |
| try { |
| return ConfiguredTargetFunction.computeUnloadedToolchainContexts( |
| env, |
| key.getLabel(), |
| true, |
| Predicates.alwaysFalse(), |
| configuration.getKey(), |
| aspect.getDefinition().getToolchainTypes(), |
| aspect.getDefinition().execCompatibleWith(), |
| aspect.getDefinition().execGroups(), |
| null); |
| } catch (ToolchainException e) { |
| // TODO(katre): better error handling |
| throw new AspectCreationException( |
| e.getMessage(), new LabelCause(key.getLabel(), e.getDetailedExitCode())); |
| } |
| } |
| |
| /** |
| * Collects {@link AspectKey} dependencies by performing a postorder traversal over {@link |
| * AspectKey#getBaseKeys}. |
| * |
| * <p>The resulting set of {@code orderedKeys} is topologically ordered: each aspect key appears |
| * after all of its dependencies. |
| */ |
| private static void collectAspectKeysInTopologicalOrder( |
| List<AspectKey> baseKeys, LinkedHashSet<AspectKey> orderedKeys) { |
| for (AspectKey key : baseKeys) { |
| if (!orderedKeys.contains(key)) { |
| collectAspectKeysInTopologicalOrder(key.getBaseKeys(), orderedKeys); |
| orderedKeys.add(key); |
| } |
| } |
| } |
| |
| /** |
| * Computes the given aspectKey of an alias-like target, by depending on the corresponding key of |
| * the next target in the alias chain (if there are more), or the "real" configured target. |
| */ |
| @Nullable |
| private AspectValue createAliasAspect( |
| Environment env, |
| TargetAndConfiguration originalTarget, |
| Aspect aspect, |
| AspectKey originalKey, |
| BuildConfigurationValue aspectConfiguration, |
| ConfiguredTarget configuredTarget) |
| throws AspectFunctionException, InterruptedException { |
| ImmutableList<Label> aliasChain = |
| configuredTarget.getProvider(AliasProvider.class).getAliasChain(); |
| // Find the next alias in the chain: either the next alias (if there are two) or the name of |
| // the real configured target. |
| Label aliasedLabel = aliasChain.size() > 1 ? aliasChain.get(1) : configuredTarget.getLabel(); |
| |
| NestedSetBuilder<Package> transitivePackages = |
| storeTransitivePackages ? NestedSetBuilder.stableOrder() : null; |
| NestedSetBuilder<Cause> transitiveRootCauses = NestedSetBuilder.stableOrder(); |
| |
| // Compute the Dependency from originalTarget to aliasedLabel |
| Dependency dep; |
| try { |
| ConfiguredTargetFunction.ComputedToolchainContexts computedToolchainContexts = |
| getUnloadedToolchainContexts(env, originalKey, aspect, originalTarget.getConfiguration()); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| |
| ToolchainCollection<UnloadedToolchainContext> unloadedToolchainContexts = |
| computedToolchainContexts.toolchainCollection; |
| |
| // See comment in compute() above for why we pair target with aspectConfiguration here |
| TargetAndConfiguration originalTargetAndAspectConfiguration = |
| new TargetAndConfiguration(originalTarget.getTarget(), aspectConfiguration); |
| |
| // Get the configuration targets that trigger this rule's configurable attributes. |
| ConfigConditions configConditions = |
| ConfiguredTargetFunction.getConfigConditions( |
| env, |
| originalTargetAndAspectConfiguration, |
| transitivePackages, |
| unloadedToolchainContexts == null |
| ? null |
| : unloadedToolchainContexts.getTargetPlatform(), |
| transitiveRootCauses); |
| if (configConditions == null) { |
| // Those targets haven't yet been resolved. |
| return null; |
| } |
| |
| Target aliasedTarget = getTargetFromLabel(env, aliasedLabel); |
| if (aliasedTarget == null) { |
| return null; |
| } |
| ConfigurationTransition transition = |
| TransitionResolver.evaluateTransition( |
| aspectConfiguration, |
| NoTransition.INSTANCE, |
| aliasedTarget, |
| ((ConfiguredRuleClassProvider) ruleClassProvider).getTrimmingTransitionFactory()); |
| |
| // Use ConfigurationResolver to apply any configuration transitions on the alias edge. |
| // This is a shortened/simplified variant of ConfiguredTargetFunction.computeDependencies |
| // for just the one special attribute we care about here. |
| DependencyKey depKey = |
| DependencyKey.builder().setLabel(aliasedLabel).setTransition(transition).build(); |
| DependencyKind depKind = |
| DependencyKind.AttributeDependencyKind.forRule( |
| getAttributeContainingAlias(originalTarget.getTarget())); |
| ConfigurationResolver resolver = |
| new ConfigurationResolver( |
| env, |
| originalTargetAndAspectConfiguration, |
| buildViewProvider.getSkyframeBuildView().getHostConfiguration(), |
| configConditions.asProviders(), |
| buildViewProvider.getSkyframeBuildView().getStarlarkTransitionCache()); |
| ImmutableList<Dependency> deps = |
| resolver.resolveConfiguration(depKind, depKey, env.getListener()); |
| if (deps == null) { |
| return null; |
| } |
| // Actual should resolve to exactly one dependency |
| Preconditions.checkState( |
| deps.size() == 1, "Unexpected split in alias %s: %s", originalTarget.getLabel(), deps); |
| dep = deps.get(0); |
| } catch (NoSuchPackageException | NoSuchTargetException e) { |
| throw new AspectFunctionException(e); |
| } catch (ConfiguredValueCreationException e) { |
| throw new AspectFunctionException(e); |
| } catch (AspectCreationException e) { |
| throw new AspectFunctionException(e); |
| } |
| |
| if (!transitiveRootCauses.isEmpty()) { |
| NestedSet<Cause> causes = transitiveRootCauses.build(); |
| throw new AspectFunctionException( |
| new AspectCreationException( |
| "Loading failed", |
| causes, |
| ConfiguredTargetFunction.getPrioritizedDetailedExitCode(causes))); |
| } |
| |
| // Now that we have a Dependency, we can compute the aliased key and depend on it |
| AspectKey actualKey = buildAliasAspectKey(originalKey, aliasedLabel, dep); |
| return createAliasAspect( |
| env, originalTarget.getTarget(), originalKey, aspect, actualKey, transitivePackages); |
| } |
| |
| @Nullable |
| private static AspectValue createAliasAspect( |
| Environment env, |
| Target originalTarget, |
| AspectKey originalKey, |
| Aspect aspect, |
| AspectKey depKey, |
| @Nullable NestedSetBuilder<Package> transitivePackages) |
| throws InterruptedException { |
| // Compute the AspectValue of the target the alias refers to (which can itself be either an |
| // alias or a real target) |
| AspectValue real = (AspectValue) env.getValue(depKey); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| |
| NestedSet<Package> finalTransitivePackages = null; |
| if (transitivePackages != null) { |
| finalTransitivePackages = |
| transitivePackages |
| .addTransitive(Preconditions.checkNotNull(real.getTransitivePackages())) |
| .add(originalTarget.getPackage()) |
| .build(); |
| } |
| return new AspectValue( |
| originalKey, |
| aspect, |
| originalTarget.getLocation(), |
| ConfiguredAspect.forAlias(real.getConfiguredAspect()), |
| finalTransitivePackages); |
| } |
| |
| @Nullable |
| private static Target getTargetFromLabel(Environment env, Label aliasLabel) |
| throws InterruptedException, NoSuchPackageException, NoSuchTargetException { |
| SkyValue val = |
| env.getValueOrThrow( |
| PackageValue.key(aliasLabel.getPackageIdentifier()), NoSuchPackageException.class); |
| if (val == null) { |
| return null; |
| } |
| |
| Package pkg = ((PackageValue) val).getPackage(); |
| return pkg.getTarget(aliasLabel.getName()); |
| } |
| |
| private static AspectKey buildAliasAspectKey( |
| AspectKey originalKey, Label aliasLabel, Dependency dep) { |
| ImmutableList<AspectKey> aliasedBaseKeys = |
| originalKey.getBaseKeys().stream() |
| .map(baseKey -> buildAliasAspectKey(baseKey, aliasLabel, dep)) |
| .collect(toImmutableList()); |
| return AspectKeyCreator.createAspectKey( |
| originalKey.getAspectDescriptor(), |
| aliasedBaseKeys, |
| ConfiguredTargetKey.builder() |
| .setLabel(aliasLabel) |
| .setConfiguration(dep.getConfiguration()) |
| .build()); |
| } |
| |
| /** |
| * Given an alias-like target, returns the attribute containing the "actual", by looking for |
| * attribute names used in known alias rules (Alias, Bind, LateBoundAlias, XcodeConfigAlias). |
| * |
| * <p>Alias and Bind rules use "actual", which will be by far the most common match here. It'll |
| * likely be rare that aspects need to traverse across other alias-like rules. |
| */ |
| // TODO(lberki,kmb): try to avoid this, maybe by recording the attribute name in AliasProvider |
| private static Attribute getAttributeContainingAlias(Target originalTarget) { |
| Attribute aliasAttr = null; |
| for (Attribute attr : originalTarget.getAssociatedRule().getAttributes()) { |
| switch (attr.getName()) { |
| case "actual": // alias and bind rules |
| case ":alias": // LateBoundAlias-derived rules |
| case ":xcode_config": // xcode_config_alias rule |
| Preconditions.checkState( |
| aliasAttr == null, |
| "Found multiple candidate attributes %s and %s in %s", |
| aliasAttr, |
| attr, |
| originalTarget); |
| aliasAttr = attr; |
| break; |
| default: |
| break; |
| } |
| } |
| Preconditions.checkState( |
| aliasAttr != null, "Attribute containing alias not found in %s", originalTarget); |
| return aliasAttr; |
| } |
| |
| @Nullable |
| private AspectValue createAspect( |
| Environment env, |
| AspectKey key, |
| ImmutableList<Aspect> topologicalAspectPath, |
| Aspect aspect, |
| ConfiguredAspectFactory aspectFactory, |
| ConfiguredTargetAndData associatedTarget, |
| BuildConfigurationValue configuration, |
| ConfigConditions configConditions, |
| @Nullable ToolchainCollection<ResolvedToolchainContext> toolchainContexts, |
| @Nullable ExecGroupCollection.Builder execGroupCollectionBuilder, |
| OrderedSetMultimap<DependencyKind, ConfiguredTargetAndData> directDeps, |
| @Nullable NestedSetBuilder<Package> transitivePackages) |
| throws AspectFunctionException, InterruptedException { |
| // Should be successfully evaluated and cached from the loading phase. |
| StarlarkBuiltinsValue starlarkBuiltinsValue = |
| (StarlarkBuiltinsValue) env.getValue(StarlarkBuiltinsValue.key()); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| |
| SkyframeBuildView view = buildViewProvider.getSkyframeBuildView(); |
| |
| StoredEventHandler events = new StoredEventHandler(); |
| CachingAnalysisEnvironment analysisEnvironment = |
| view.createAnalysisEnvironment(key, events, env, configuration, starlarkBuiltinsValue); |
| |
| ConfiguredAspect configuredAspect; |
| if (aspect.getDefinition().applyToGeneratingRules() |
| && associatedTarget.getTarget() instanceof OutputFile) { |
| OutputFile outputFile = (OutputFile) associatedTarget.getTarget(); |
| Label label = outputFile.getGeneratingRule().getLabel(); |
| return createAliasAspect( |
| env, associatedTarget.getTarget(), key, aspect, key.withLabel(label), transitivePackages); |
| } else if (AspectResolver.aspectMatchesConfiguredTarget(associatedTarget, aspect)) { |
| try { |
| CurrentRuleTracker.beginConfiguredAspect(aspect.getAspectClass()); |
| configuredAspect = |
| view.getConfiguredTargetFactory() |
| .createAspect( |
| analysisEnvironment, |
| associatedTarget, |
| topologicalAspectPath, |
| aspectFactory, |
| aspect, |
| directDeps, |
| configConditions, |
| toolchainContexts, |
| execGroupCollectionBuilder, |
| configuration, |
| view.getHostConfiguration(), |
| transitivePackages == null ? null : transitivePackages.build(), |
| key); |
| } catch (MissingDepException e) { |
| Preconditions.checkState(env.valuesMissing()); |
| return null; |
| } catch (ActionConflictException e) { |
| throw new AspectFunctionException(e); |
| } catch (InvalidExecGroupException e) { |
| throw new AspectFunctionException(e); |
| } finally { |
| CurrentRuleTracker.endConfiguredAspect(); |
| } |
| } else { |
| configuredAspect = ConfiguredAspect.forNonapplicableTarget(); |
| } |
| |
| events.replayOn(env.getListener()); |
| if (events.hasErrors()) { |
| analysisEnvironment.disable(associatedTarget.getTarget()); |
| String msg = "Analysis of target '" + associatedTarget.getTarget().getLabel() + "' failed"; |
| throw new AspectFunctionException( |
| new AspectCreationException(msg, key.getLabel(), configuration)); |
| } |
| Preconditions.checkState(!analysisEnvironment.hasErrors(), |
| "Analysis environment hasError() but no errors reported"); |
| |
| if (env.valuesMissing()) { |
| return null; |
| } |
| |
| analysisEnvironment.disable(associatedTarget.getTarget()); |
| Preconditions.checkNotNull(configuredAspect); |
| |
| return new AspectValue( |
| key, |
| aspect, |
| associatedTarget.getTarget().getLocation(), |
| configuredAspect, |
| transitivePackages == null ? null : transitivePackages.build()); |
| } |
| |
| @Override |
| public String extractTag(SkyKey skyKey) { |
| AspectKey aspectKey = (AspectKey) skyKey.argument(); |
| return Label.print(aspectKey.getLabel()); |
| } |
| |
| /** Used to indicate errors during the computation of an {@link AspectValue}. */ |
| public static final class AspectFunctionException extends SkyFunctionException { |
| public AspectFunctionException(NoSuchThingException e) { |
| super(e, Transience.PERSISTENT); |
| } |
| |
| public AspectFunctionException(AspectCreationException e) { |
| super(e, Transience.PERSISTENT); |
| } |
| |
| public AspectFunctionException(ConfiguredValueCreationException e) { |
| super(e, Transience.PERSISTENT); |
| } |
| |
| public AspectFunctionException(InvalidExecGroupException e) { |
| super(e, Transience.PERSISTENT); |
| } |
| |
| public AspectFunctionException(ActionConflictException cause) { |
| super(cause, Transience.PERSISTENT); |
| } |
| } |
| } |
