| // 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 com.google.common.base.Function; |
| import com.google.common.base.Preconditions; |
| import com.google.common.base.Verify; |
| import com.google.common.collect.ArrayListMultimap; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.ListMultimap; |
| import com.google.common.collect.Multimap; |
| import com.google.devtools.build.lib.actions.Action; |
| import com.google.devtools.build.lib.actions.Actions; |
| import com.google.devtools.build.lib.actions.Artifact; |
| import com.google.devtools.build.lib.actions.MutableActionGraph.ActionConflictException; |
| import com.google.devtools.build.lib.analysis.CachingAnalysisEnvironment; |
| import com.google.devtools.build.lib.analysis.ConfiguredAspect; |
| import com.google.devtools.build.lib.analysis.ConfiguredTarget; |
| import com.google.devtools.build.lib.analysis.DependencyResolver.Dependency; |
| import com.google.devtools.build.lib.analysis.LabelAndConfiguration; |
| import com.google.devtools.build.lib.analysis.RuleConfiguredTarget; |
| import com.google.devtools.build.lib.analysis.TargetAndConfiguration; |
| import com.google.devtools.build.lib.analysis.TransitiveInfoProvider; |
| import com.google.devtools.build.lib.analysis.config.BuildConfiguration; |
| import com.google.devtools.build.lib.analysis.config.BuildOptions; |
| import com.google.devtools.build.lib.analysis.config.ConfigMatchingProvider; |
| import com.google.devtools.build.lib.analysis.config.HostTransition; |
| import com.google.devtools.build.lib.analysis.config.InvalidConfigurationException; |
| import com.google.devtools.build.lib.analysis.config.PatchTransition; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder; |
| 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.AspectDefinition; |
| import com.google.devtools.build.lib.packages.Attribute; |
| import com.google.devtools.build.lib.packages.BuildFileContainsErrorsException; |
| import com.google.devtools.build.lib.packages.BuildType; |
| 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.Package; |
| import com.google.devtools.build.lib.packages.RawAttributeMapper; |
| import com.google.devtools.build.lib.packages.Rule; |
| import com.google.devtools.build.lib.packages.RuleClassProvider; |
| import com.google.devtools.build.lib.packages.Target; |
| import com.google.devtools.build.lib.packages.TargetUtils; |
| import com.google.devtools.build.lib.skyframe.AspectFunction.AspectCreationException; |
| import com.google.devtools.build.lib.skyframe.SkyframeExecutor.BuildViewProvider; |
| import com.google.devtools.build.lib.syntax.EvalException; |
| import com.google.devtools.build.skyframe.SkyFunction; |
| import com.google.devtools.build.skyframe.SkyFunctionException; |
| import com.google.devtools.build.skyframe.SkyFunctionException.Transience; |
| import com.google.devtools.build.skyframe.SkyKey; |
| import com.google.devtools.build.skyframe.SkyValue; |
| import com.google.devtools.build.skyframe.ValueOrException; |
| import com.google.devtools.build.skyframe.ValueOrException2; |
| import com.google.devtools.build.skyframe.ValueOrException3; |
| |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| |
| import javax.annotation.Nullable; |
| |
| /** |
| * SkyFunction for {@link ConfiguredTargetValue}s. |
| */ |
| final class ConfiguredTargetFunction implements SkyFunction { |
| |
| /** |
| * Exception class that signals an error during the evaluation of a dependency. |
| */ |
| public static class DependencyEvaluationException extends Exception { |
| private final SkyKey rootCauseSkyKey; |
| |
| public DependencyEvaluationException(Exception cause) { |
| super(cause); |
| this.rootCauseSkyKey = null; |
| } |
| |
| public DependencyEvaluationException(SkyKey rootCauseSkyKey, Exception cause) { |
| super(cause); |
| this.rootCauseSkyKey = rootCauseSkyKey; |
| } |
| |
| /** |
| * Returns the key of the root cause or null if the problem was with this target. |
| */ |
| public SkyKey getRootCauseSkyKey() { |
| return rootCauseSkyKey; |
| } |
| |
| @Override |
| public Exception getCause() { |
| return (Exception) super.getCause(); |
| } |
| } |
| |
| private static final Function<Dependency, SkyKey> TO_KEYS = |
| new Function<Dependency, SkyKey>() { |
| @Override |
| public SkyKey apply(Dependency input) { |
| return ConfiguredTargetValue.key(input.getLabel(), input.getConfiguration()); |
| } |
| }; |
| |
| private final BuildViewProvider buildViewProvider; |
| private final RuleClassProvider ruleClassProvider; |
| |
| ConfiguredTargetFunction(BuildViewProvider buildViewProvider, |
| RuleClassProvider ruleClassProvider) { |
| this.buildViewProvider = buildViewProvider; |
| this.ruleClassProvider = ruleClassProvider; |
| } |
| |
| @Override |
| public SkyValue compute(SkyKey key, Environment env) throws ConfiguredTargetFunctionException, |
| InterruptedException { |
| SkyframeBuildView view = buildViewProvider.getSkyframeBuildView(); |
| NestedSetBuilder<Package> transitivePackages = NestedSetBuilder.stableOrder(); |
| ConfiguredTargetKey configuredTargetKey = (ConfiguredTargetKey) key.argument(); |
| LabelAndConfiguration lc = LabelAndConfiguration.of( |
| configuredTargetKey.getLabel(), configuredTargetKey.getConfiguration()); |
| |
| BuildConfiguration configuration = lc.getConfiguration(); |
| |
| PackageValue packageValue = |
| (PackageValue) env.getValue(PackageValue.key(lc.getLabel().getPackageIdentifier())); |
| if (packageValue == null) { |
| return null; |
| } |
| |
| Package pkg = packageValue.getPackage(); |
| if (pkg.containsErrors()) { |
| throw new ConfiguredTargetFunctionException( |
| new BuildFileContainsErrorsException(lc.getLabel().getPackageIdentifier()), |
| Transience.PERSISTENT); |
| } |
| Target target; |
| try { |
| target = packageValue.getPackage().getTarget(lc.getLabel().getName()); |
| } catch (NoSuchTargetException e1) { |
| throw new ConfiguredTargetFunctionException(new NoSuchTargetException(lc.getLabel(), |
| "No such target")); |
| } |
| transitivePackages.add(packageValue.getPackage()); |
| // TODO(bazel-team): This is problematic - we create the right key, but then end up with a value |
| // that doesn't match; we can even have the same value multiple times. However, I think it's |
| // only triggered in tests (i.e., in normal operation, the configuration passed in is already |
| // null). |
| if (!target.isConfigurable()) { |
| configuration = null; |
| } |
| TargetAndConfiguration ctgValue = |
| new TargetAndConfiguration(target, configuration); |
| |
| SkyframeDependencyResolver resolver = view.createDependencyResolver(env); |
| if (resolver == null) { |
| return null; |
| } |
| |
| try { |
| // Get the configuration targets that trigger this rule's configurable attributes. |
| Set<ConfigMatchingProvider> configConditions = |
| getConfigConditions(ctgValue.getTarget(), env, resolver, ctgValue, transitivePackages); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| |
| ListMultimap<Attribute, ConfiguredTarget> depValueMap = |
| computeDependencies( |
| env, |
| resolver, |
| ctgValue, |
| null, |
| configConditions, |
| ruleClassProvider, |
| view.getHostConfiguration(configuration), |
| transitivePackages); |
| ConfiguredTargetValue ans = createConfiguredTarget( |
| view, env, target, configuration, depValueMap, configConditions, transitivePackages); |
| return ans; |
| } catch (DependencyEvaluationException e) { |
| throw new ConfiguredTargetFunctionException(e.getRootCauseSkyKey(), e.getCause()); |
| } catch (AspectCreationException e) { |
| throw new ConfiguredTargetFunctionException( |
| new ConfiguredValueCreationException(e.getMessage())); |
| } |
| } |
| |
| /** |
| * Computes the direct dependencies of a node in the configured target graph (a configured |
| * target or an aspect). |
| * |
| * <p>Returns null if Skyframe hasn't evaluated the required dependencies yet. In this case, the |
| * caller should also return null to Skyframe. |
| * @param env the Skyframe environment |
| * @param resolver The dependency resolver |
| * @param ctgValue The label and the configuration of the node |
| * @param aspect |
| * @param configConditions the configuration conditions for evaluating the attributes of the node |
| * @param ruleClassProvider rule class provider for determining the right configuration fragments |
| * to apply to deps |
| * @param hostConfiguration the host configuration. There's a noticeable performance hit from |
| * instantiating this on demand for every dependency that wants it, so it's best to compute |
| * the host configuration as early as possible and pass this reference to all consumers |
| * */ |
| @Nullable |
| static ListMultimap<Attribute, ConfiguredTarget> computeDependencies( |
| Environment env, |
| SkyframeDependencyResolver resolver, |
| TargetAndConfiguration ctgValue, |
| Aspect aspect, |
| Set<ConfigMatchingProvider> configConditions, |
| RuleClassProvider ruleClassProvider, |
| BuildConfiguration hostConfiguration, |
| NestedSetBuilder<Package> transitivePackages) |
| throws DependencyEvaluationException, AspectCreationException, InterruptedException { |
| // Create the map from attributes to list of (target, configuration) pairs. |
| ListMultimap<Attribute, Dependency> depValueNames; |
| try { |
| depValueNames = |
| resolver.dependentNodeMap(ctgValue, hostConfiguration, aspect, configConditions); |
| } catch (EvalException e) { |
| env.getListener().handle(Event.error(e.getLocation(), e.getMessage())); |
| throw new DependencyEvaluationException(new ConfiguredValueCreationException(e.print())); |
| } |
| |
| // Trim each dep's configuration so it only includes the fragments needed by its transitive |
| // closure (only dynamic configurations support this). |
| if (ctgValue.getConfiguration() != null |
| && ctgValue.getConfiguration().useDynamicConfigurations()) { |
| depValueNames = trimConfigurations(env, ctgValue, depValueNames, hostConfiguration, |
| ruleClassProvider); |
| if (depValueNames == null) { |
| return null; |
| } |
| } |
| |
| // Resolve configured target dependencies and handle errors. |
| Map<SkyKey, ConfiguredTarget> depValues = resolveConfiguredTargetDependencies(env, |
| depValueNames.values(), ctgValue.getTarget(), transitivePackages); |
| if (depValues == null) { |
| return null; |
| } |
| |
| // Resolve required aspects. |
| ListMultimap<SkyKey, ConfiguredAspect> depAspects = |
| resolveAspectDependencies(env, depValues, depValueNames.values(), transitivePackages); |
| if (depAspects == null) { |
| return null; |
| } |
| |
| // Merge the dependent configured targets and aspects into a single map. |
| return mergeAspects(depValueNames, depValues, depAspects); |
| } |
| |
| /** |
| * Helper class for {@link #trimConfigurations} - encapsulates a set of config fragments and |
| * a dynamic transition. This can be used to determine the exact build options needed to |
| * set a dynamic configuration. |
| */ |
| private static final class FragmentsAndTransition { |
| // Treat this as immutable. The only reason this isn't an ImmutableSet is because it |
| // gets bound to a NestedSet.toSet() reference, which returns a Set interface. |
| final Set<Class<? extends BuildConfiguration.Fragment>> fragments; |
| final Attribute.Transition transition; |
| private final int hashCode; |
| |
| FragmentsAndTransition(Set<Class<? extends BuildConfiguration.Fragment>> fragments, |
| Attribute.Transition transition) { |
| this.fragments = fragments; |
| this.transition = transition; |
| hashCode = Objects.hash(this.fragments, this.transition); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o == this) { |
| return true; |
| } else if (o == null) { |
| return false; |
| } else { |
| FragmentsAndTransition other = (FragmentsAndTransition) o; |
| return other.transition.equals(transition) && other.fragments.equals(fragments); |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return hashCode; |
| } |
| } |
| |
| /** |
| * Creates a dynamic configuration for each dep that's custom-fitted specifically for that dep. |
| * |
| * <p>More specifically: given a set of {@link Dependency} instances holding dynamic config |
| * transition requests (e.g. {@link Dependency#hasStaticConfiguration()} == false}), returns |
| * equivalent dependencies containing dynamically created configurations that a) apply those |
| * transitions and b) only contain the fragments needed by the dep and everything in its |
| * transitive closure. |
| * |
| * <p>This method is heavily performance-optimized. Because it, in aggregate, reads over every |
| * edge in the configured target graph, small inefficiencies can have observable impact on |
| * build analysis time. Keep this in mind when making modifications and performance-test any |
| * changes you make. |
| */ |
| @Nullable |
| static ListMultimap<Attribute, Dependency> trimConfigurations(Environment env, |
| TargetAndConfiguration ctgValue, ListMultimap<Attribute, Dependency> originalDeps, |
| BuildConfiguration hostConfiguration, RuleClassProvider ruleClassProvider) |
| throws DependencyEvaluationException { |
| |
| // Maps each Skyframe-evaluated BuildConfiguration to the dependencies that need that |
| // configuration. For cases where Skyframe isn't needed to get the configuration (e.g. when |
| // we just re-used the original rule's configuration), we should skip this outright. |
| Multimap<SkyKey, Map.Entry<Attribute, Dependency>> keysToEntries = ArrayListMultimap.create(); |
| |
| // Stores the result of applying a dynamic transition to the current configuration using a |
| // particular subset of fragments. By caching this, we save from redundantly computing the |
| // same transition for every dependency edge that requests that transition. This can have |
| // real effect on analysis time for commonly triggered transitions. |
| Map<FragmentsAndTransition, BuildOptions> transitionsMap = new HashMap<>(); |
| |
| // The fragments used by the current target's configuration. |
| Set<Class<? extends BuildConfiguration.Fragment>> ctgFragments = |
| ctgValue.getConfiguration().fragmentClasses(); |
| BuildOptions ctgOptions = ctgValue.getConfiguration().getOptions(); |
| |
| // Our output map. |
| ListMultimap<Attribute, Dependency> trimmedDeps = ArrayListMultimap.create(); |
| |
| for (Map.Entry<Attribute, Dependency> depsEntry : originalDeps.entries()) { |
| Dependency dep = depsEntry.getValue(); |
| |
| if (dep.hasStaticConfiguration()) { |
| // Certain targets (like output files) trivially pass their configurations to their deps. |
| // So no need to transform them in any way. |
| trimmedDeps.put(depsEntry.getKey(), |
| new Dependency(dep.getLabel(), dep.getConfiguration(), dep.getAspects())); |
| continue; |
| } else if (dep.getTransition() == Attribute.ConfigurationTransition.NULL) { |
| trimmedDeps.put(depsEntry.getKey(), |
| new Dependency(dep.getLabel(), (BuildConfiguration) null, dep.getAspects())); |
| continue; |
| } |
| |
| // Figure out the required fragments for this dep and its transitive closure. |
| SkyKey fragmentsKey = TransitiveTargetValue.key(dep.getLabel()); |
| TransitiveTargetValue transitiveDepInfo = (TransitiveTargetValue) env.getValue(fragmentsKey); |
| if (transitiveDepInfo == null) { |
| // This should only be possible for tests. In actual runs, this was already called |
| // as a routine part of the loading phase. |
| // TODO(bazel-team): check this only occurs in a test context. |
| return null; |
| } |
| Set<Class<? extends BuildConfiguration.Fragment>> depFragments = |
| transitiveDepInfo.getTransitiveConfigFragments().toSet(); |
| |
| boolean sameFragments = depFragments.equals(ctgFragments); |
| Attribute.Transition transition = dep.getTransition(); |
| |
| if (sameFragments) { |
| if (transition == Attribute.ConfigurationTransition.NONE) { |
| // The dep uses the same exact configuration. |
| trimmedDeps.put(depsEntry.getKey(), |
| new Dependency(dep.getLabel(), ctgValue.getConfiguration(), dep.getAspects())); |
| continue; |
| } else if (transition == HostTransition.INSTANCE) { |
| // The current rule's host configuration can also be used for the dep. We short-circuit |
| // the standard transition logic for host transitions because these transitions are |
| // uniquely frequent. It's possible, e.g., for every node in the configured target graph |
| // to incur multiple host transitions. So we aggressively optimize to avoid hurting |
| // analysis time. |
| trimmedDeps.put(depsEntry.getKey(), |
| new Dependency(dep.getLabel(), hostConfiguration, dep.getAspects())); |
| continue; |
| } |
| } |
| |
| // Apply the transition or use the cached result if it was already applied. |
| FragmentsAndTransition transitionKey = new FragmentsAndTransition(depFragments, transition); |
| BuildOptions toOptions = transitionsMap.get(transitionKey); |
| if (toOptions == null) { |
| Verify.verify(transition == Attribute.ConfigurationTransition.NONE |
| || transition instanceof PatchTransition); |
| BuildOptions fromOptions = ctgOptions; |
| if (!sameFragments) { |
| // TODO(bazel-team): pre-compute getOptionsClasses in the constructor. |
| fromOptions = fromOptions.trim(BuildConfiguration.getOptionsClasses( |
| transitiveDepInfo.getTransitiveConfigFragments(), ruleClassProvider)); |
| } |
| // TODO(bazel-team): safety-check that the below call never mutates fromOptions. |
| toOptions = transition == Attribute.ConfigurationTransition.NONE |
| ? fromOptions |
| : ((PatchTransition) transition).apply(fromOptions); |
| transitionsMap.put(transitionKey, toOptions); |
| } |
| |
| // If the transition doesn't change the configuration, trivially re-use the original |
| // configuration. |
| if (sameFragments && toOptions.equals(ctgOptions)) { |
| trimmedDeps.put(depsEntry.getKey(), |
| new Dependency(dep.getLabel(), ctgValue.getConfiguration(), dep.getAspects())); |
| continue; |
| } |
| |
| // If we get here, we have to get the configuration from Skyframe. |
| keysToEntries.put(BuildConfigurationValue.key(depFragments, toOptions), depsEntry); |
| } |
| |
| // Get all BuildConfigurations we need to get from Skyframe. |
| Map<SkyKey, ValueOrException<InvalidConfigurationException>> depConfigValues = |
| env.getValuesOrThrow(keysToEntries.keySet(), InvalidConfigurationException.class); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| |
| // Now fill in the remaining unresolved deps with the now-resolved configurations. |
| try { |
| for (Map.Entry<SkyKey, ValueOrException<InvalidConfigurationException>> entry : |
| depConfigValues.entrySet()) { |
| SkyKey key = entry.getKey(); |
| BuildConfigurationValue trimmedConfig = (BuildConfigurationValue) entry.getValue().get(); |
| for (Map.Entry<Attribute, Dependency> info : keysToEntries.get(key)) { |
| Attribute attribute = info.getKey(); |
| Dependency originalDep = info.getValue(); |
| trimmedDeps.put(attribute, |
| new Dependency(originalDep.getLabel(), trimmedConfig.getConfiguration(), |
| originalDep.getAspects())); |
| } |
| } |
| } catch (InvalidConfigurationException e) { |
| throw new DependencyEvaluationException(e); |
| } |
| |
| return trimmedDeps; |
| } |
| |
| /** |
| * Merges the each direct dependency configured target with the aspects associated with it. |
| * |
| * <p>Note that the combination of a configured target and its associated aspects are not |
| * represented by a Skyframe node. This is because there can possibly be many different |
| * combinations of aspects for a particular configured target, so it would result in a |
| * combinatiorial explosion of Skyframe nodes. |
| */ |
| private static ListMultimap<Attribute, ConfiguredTarget> mergeAspects( |
| ListMultimap<Attribute, Dependency> depValueNames, |
| Map<SkyKey, ConfiguredTarget> depConfiguredTargetMap, |
| ListMultimap<SkyKey, ConfiguredAspect> depAspectMap) { |
| ListMultimap<Attribute, ConfiguredTarget> result = ArrayListMultimap.create(); |
| |
| for (Map.Entry<Attribute, Dependency> entry : depValueNames.entries()) { |
| Dependency dep = entry.getValue(); |
| SkyKey depKey = TO_KEYS.apply(dep); |
| ConfiguredTarget depConfiguredTarget = depConfiguredTargetMap.get(depKey); |
| result.put(entry.getKey(), |
| RuleConfiguredTarget.mergeAspects(depConfiguredTarget, depAspectMap.get(depKey))); |
| } |
| |
| return result; |
| } |
| |
| /** |
| * Given a list of {@link Dependency} objects, returns a multimap from the {@link SkyKey} of the |
| * dependency to the {@link ConfiguredAspect} instances that should be merged into it. |
| * |
| * <p>Returns null if the required aspects are not computed yet. |
| */ |
| @Nullable |
| private static ListMultimap<SkyKey, ConfiguredAspect> resolveAspectDependencies( |
| Environment env, |
| Map<SkyKey, ConfiguredTarget> configuredTargetMap, |
| Iterable<Dependency> deps, |
| NestedSetBuilder<Package> transitivePackages) |
| throws AspectCreationException { |
| ListMultimap<SkyKey, ConfiguredAspect> result = ArrayListMultimap.create(); |
| Set<SkyKey> aspectKeys = new HashSet<>(); |
| for (Dependency dep : deps) { |
| for (Aspect depAspect : dep.getAspects()) { |
| aspectKeys.add(createAspectKey(dep.getLabel(), dep.getConfiguration(), depAspect)); |
| } |
| } |
| |
| Map<SkyKey, ValueOrException3< |
| AspectCreationException, NoSuchThingException, ConfiguredValueCreationException>> |
| depAspects = env.getValuesOrThrow(aspectKeys, AspectCreationException.class, |
| NoSuchThingException.class, ConfiguredValueCreationException.class); |
| |
| for (Dependency dep : deps) { |
| SkyKey depKey = TO_KEYS.apply(dep); |
| // If the same target was declared in different attributes of rule, we should not process it |
| // twice. |
| if (result.containsKey(depKey)) { |
| continue; |
| } |
| ConfiguredTarget depConfiguredTarget = configuredTargetMap.get(depKey); |
| for (Aspect depAspect : dep.getAspects()) { |
| if (!aspectMatchesConfiguredTarget(depConfiguredTarget, depAspect)) { |
| continue; |
| } |
| |
| SkyKey aspectKey = createAspectKey(dep.getLabel(), dep.getConfiguration(), depAspect); |
| AspectValue aspectValue = null; |
| try { |
| aspectValue = (AspectValue) depAspects.get(aspectKey).get(); |
| } catch (ConfiguredValueCreationException e) { |
| // The configured target should have been created in resolveConfiguredTargetDependencies() |
| throw new IllegalStateException(e); |
| } catch (NoSuchThingException e) { |
| throw new AspectCreationException( |
| String.format( |
| "Evaluation of aspect %s on %s failed: %s", |
| depAspect.getDefinition().getName(), |
| dep.getLabel(), |
| e.toString())); |
| } |
| |
| if (aspectValue == null) { |
| // Dependent aspect has either not been computed yet or is in error. |
| return null; |
| } |
| result.put(depKey, aspectValue.getConfiguredAspect()); |
| transitivePackages.addTransitive(aspectValue.getTransitivePackages()); |
| } |
| } |
| return result; |
| } |
| |
| public static SkyKey createAspectKey( |
| Label label, BuildConfiguration buildConfiguration, Aspect depAspect) { |
| return AspectValue.key(label, |
| buildConfiguration, |
| depAspect.getAspectClass(), |
| depAspect.getParameters()); |
| } |
| |
| private static boolean aspectMatchesConfiguredTarget(ConfiguredTarget dep, Aspect aspectClass) { |
| AspectDefinition aspectDefinition = aspectClass.getDefinition(); |
| for (Class<?> provider : aspectDefinition.getRequiredProviders()) { |
| if (dep.getProvider(provider.asSubclass(TransitiveInfoProvider.class)) == null) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * Returns the set of {@link ConfigMatchingProvider}s that key the configurable attributes |
| * used by this rule. |
| * |
| * <p>>If the configured targets supplying those providers aren't yet resolved by the |
| * dependency resolver, returns null. |
| */ |
| @Nullable |
| static Set<ConfigMatchingProvider> getConfigConditions(Target target, Environment env, |
| SkyframeDependencyResolver resolver, TargetAndConfiguration ctgValue, |
| NestedSetBuilder<Package> transitivePackages) |
| throws DependencyEvaluationException { |
| if (!(target instanceof Rule)) { |
| return ImmutableSet.of(); |
| } |
| |
| ImmutableSet.Builder<ConfigMatchingProvider> configConditions = ImmutableSet.builder(); |
| |
| // Collect the labels of the configured targets we need to resolve. |
| ListMultimap<Attribute, LabelAndConfiguration> configLabelMap = ArrayListMultimap.create(); |
| RawAttributeMapper attributeMap = RawAttributeMapper.of(((Rule) target)); |
| for (Attribute a : ((Rule) target).getAttributes()) { |
| for (Label configLabel : attributeMap.getConfigurabilityKeys(a.getName(), a.getType())) { |
| if (!BuildType.Selector.isReservedLabel(configLabel)) { |
| configLabelMap.put(a, LabelAndConfiguration.of( |
| configLabel, ctgValue.getConfiguration())); |
| } |
| } |
| } |
| if (configLabelMap.isEmpty()) { |
| return ImmutableSet.of(); |
| } |
| |
| // Collect the corresponding Skyframe configured target values. Abort early if they haven't |
| // been computed yet. |
| Collection<Dependency> configValueNames = resolver.resolveRuleLabels(ctgValue, configLabelMap); |
| |
| // No need to get new configs from Skyframe - config_setting rules always use the current |
| // target's config. |
| // TODO(bazel-team): remove the need for this special transformation. We can probably do this by |
| // simply passing this through trimConfigurations. |
| BuildConfiguration targetConfig = ctgValue.getConfiguration(); |
| if (targetConfig != null && targetConfig.useDynamicConfigurations()) { |
| ImmutableList.Builder<Dependency> staticConfigs = ImmutableList.builder(); |
| for (Dependency dep : configValueNames) { |
| staticConfigs.add(new Dependency(dep.getLabel(), targetConfig, dep.getAspects())); |
| } |
| configValueNames = staticConfigs.build(); |
| } |
| |
| Map<SkyKey, ConfiguredTarget> configValues = |
| resolveConfiguredTargetDependencies(env, configValueNames, target, transitivePackages); |
| if (configValues == null) { |
| return null; |
| } |
| |
| // Get the configured targets as ConfigMatchingProvider interfaces. |
| for (Dependency entry : configValueNames) { |
| ConfiguredTarget value = configValues.get(TO_KEYS.apply(entry)); |
| // The code above guarantees that value is non-null here. |
| ConfigMatchingProvider provider = value.getProvider(ConfigMatchingProvider.class); |
| if (provider != null) { |
| configConditions.add(provider); |
| } else { |
| // Not a valid provider for configuration conditions. |
| String message = |
| entry.getLabel() + " is not a valid configuration key for " + target.getLabel(); |
| env.getListener().handle(Event.error(TargetUtils.getLocationMaybe(target), message)); |
| throw new DependencyEvaluationException(new ConfiguredValueCreationException(message)); |
| } |
| } |
| |
| return configConditions.build(); |
| } |
| |
| /*** |
| * Resolves the targets referenced in depValueNames and returns their ConfiguredTarget |
| * instances. |
| * |
| * <p>Returns null if not all instances are available yet. |
| * |
| */ |
| @Nullable |
| private static Map<SkyKey, ConfiguredTarget> resolveConfiguredTargetDependencies( |
| Environment env, Collection<Dependency> deps, Target target, |
| NestedSetBuilder<Package> transitivePackages) |
| throws DependencyEvaluationException { |
| boolean ok = !env.valuesMissing(); |
| String message = null; |
| Iterable<SkyKey> depKeys = Iterables.transform(deps, TO_KEYS); |
| Map<SkyKey, ValueOrException2<NoSuchTargetException, |
| NoSuchPackageException>> depValuesOrExceptions = env.getValuesOrThrow(depKeys, |
| NoSuchTargetException.class, NoSuchPackageException.class); |
| Map<SkyKey, ConfiguredTarget> depValues = new HashMap<>(depValuesOrExceptions.size()); |
| SkyKey childKey = null; |
| NoSuchThingException transitiveChildException = null; |
| for (Map.Entry<SkyKey, ValueOrException2<NoSuchTargetException, NoSuchPackageException>> entry |
| : depValuesOrExceptions.entrySet()) { |
| ConfiguredTargetKey depKey = (ConfiguredTargetKey) entry.getKey().argument(); |
| LabelAndConfiguration depLabelAndConfiguration = LabelAndConfiguration.of( |
| depKey.getLabel(), depKey.getConfiguration()); |
| Label depLabel = depLabelAndConfiguration.getLabel(); |
| ConfiguredTargetValue depValue = null; |
| NoSuchThingException directChildException = null; |
| try { |
| depValue = (ConfiguredTargetValue) entry.getValue().get(); |
| } catch (NoSuchTargetException e) { |
| if (depLabel.equals(e.getLabel())) { |
| directChildException = e; |
| } else { |
| childKey = entry.getKey(); |
| transitiveChildException = e; |
| } |
| } catch (NoSuchPackageException e) { |
| if (depLabel.getPackageIdentifier().equals(e.getPackageId())) { |
| directChildException = e; |
| } else { |
| childKey = entry.getKey(); |
| transitiveChildException = e; |
| } |
| } |
| // If an exception wasn't caused by a direct child target value, we'll treat it the same |
| // as any other missing dep by setting ok = false below, and returning null at the end. |
| if (directChildException != null) { |
| // Only update messages for missing targets we depend on directly. |
| message = TargetUtils.formatMissingEdge(target, depLabel, directChildException); |
| env.getListener().handle(Event.error(TargetUtils.getLocationMaybe(target), message)); |
| } |
| |
| if (depValue == null) { |
| ok = false; |
| } else { |
| depValues.put(entry.getKey(), depValue.getConfiguredTarget()); |
| transitivePackages.addTransitive(depValue.getTransitivePackages()); |
| } |
| } |
| if (message != null) { |
| throw new DependencyEvaluationException(new NoSuchTargetException(message)); |
| } |
| if (childKey != null) { |
| throw new DependencyEvaluationException(childKey, transitiveChildException); |
| } |
| if (!ok) { |
| return null; |
| } else { |
| return depValues; |
| } |
| } |
| |
| |
| @Override |
| public String extractTag(SkyKey skyKey) { |
| return Label.print(((ConfiguredTargetKey) skyKey.argument()).getLabel()); |
| } |
| |
| @Nullable |
| private ConfiguredTargetValue createConfiguredTarget(SkyframeBuildView view, |
| Environment env, Target target, BuildConfiguration configuration, |
| ListMultimap<Attribute, ConfiguredTarget> depValueMap, |
| Set<ConfigMatchingProvider> configConditions, |
| NestedSetBuilder<Package> transitivePackages) |
| throws ConfiguredTargetFunctionException, InterruptedException { |
| StoredEventHandler events = new StoredEventHandler(); |
| BuildConfiguration ownerConfig = (configuration == null) |
| ? null : configuration.getArtifactOwnerConfiguration(); |
| CachingAnalysisEnvironment analysisEnvironment = view.createAnalysisEnvironment( |
| new ConfiguredTargetKey(target.getLabel(), ownerConfig), false, |
| events, env, configuration); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| |
| ConfiguredTarget configuredTarget = view.createConfiguredTarget(target, configuration, |
| analysisEnvironment, depValueMap, configConditions); |
| |
| events.replayOn(env.getListener()); |
| if (events.hasErrors()) { |
| analysisEnvironment.disable(target); |
| throw new ConfiguredTargetFunctionException(new ConfiguredValueCreationException( |
| "Analysis of target '" + target.getLabel() + "' failed; build aborted")); |
| } |
| Preconditions.checkState(!analysisEnvironment.hasErrors(), |
| "Analysis environment hasError() but no errors reported"); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| |
| analysisEnvironment.disable(target); |
| Preconditions.checkNotNull(configuredTarget, target); |
| |
| try { |
| return new ConfiguredTargetValue(configuredTarget, |
| filterSharedActionsAndThrowIfConflict(analysisEnvironment.getRegisteredActions()), |
| transitivePackages.build()); |
| } catch (ActionConflictException e) { |
| throw new ConfiguredTargetFunctionException(e); |
| } |
| } |
| |
| static Map<Artifact, Action> filterSharedActionsAndThrowIfConflict(Iterable<Action> actions) |
| throws ActionConflictException { |
| Map<Artifact, Action> generatingActions = new HashMap<>(); |
| for (Action action : actions) { |
| for (Artifact artifact : action.getOutputs()) { |
| Action previousAction = generatingActions.put(artifact, action); |
| if (previousAction != null && previousAction != action |
| && !Actions.canBeShared(previousAction, action)) { |
| throw new ActionConflictException(artifact, previousAction, action); |
| } |
| } |
| } |
| return generatingActions; |
| } |
| |
| /** |
| * An exception indicating that there was a problem during the construction of |
| * a ConfiguredTargetValue. |
| */ |
| public static final class ConfiguredValueCreationException extends Exception { |
| |
| public ConfiguredValueCreationException(String message) { |
| super(message); |
| } |
| } |
| |
| /** |
| * Used to declare all the exception types that can be wrapped in the exception thrown by |
| * {@link ConfiguredTargetFunction#compute}. |
| */ |
| public static final class ConfiguredTargetFunctionException extends SkyFunctionException { |
| public ConfiguredTargetFunctionException(NoSuchTargetException e) { |
| super(e, Transience.PERSISTENT); |
| } |
| |
| public ConfiguredTargetFunctionException( |
| BuildFileContainsErrorsException e, Transience transience) { |
| super(e, transience); |
| } |
| |
| private ConfiguredTargetFunctionException(ConfiguredValueCreationException error) { |
| super(error, Transience.PERSISTENT); |
| } |
| |
| private ConfiguredTargetFunctionException(ActionConflictException e) { |
| super(e, Transience.PERSISTENT); |
| } |
| |
| private ConfiguredTargetFunctionException( |
| @Nullable SkyKey childKey, Exception transitiveError) { |
| super(transitiveError, childKey); |
| } |
| } |
| } |
