Examples with Aspect com.google.devtools.build.lib.packages.Aspect used on opensource projects

Example 1 with Aspect

use of com.google.devtools.build.lib.packages.Aspect in project bazel by bazelbuild.

the class AspectCollection method create.

/**
   *  Creates an {@link AspectCollection} from an ordered list of aspects and
   *  a set of visible aspects.
   *
   *  The order of aspects is reverse to the order in which they originated, with
   *  the earliest originating occurring last in the list.
   */
public static AspectCollection create(Iterable<Aspect> aspectPath, Set<AspectDescriptor> visibleAspects) throws AspectCycleOnPathException {
    LinkedHashMap<AspectDescriptor, Aspect> aspectMap = deduplicateAspects(aspectPath);
    LinkedHashMap<AspectDescriptor, ArrayList<AspectDescriptor>> deps = new LinkedHashMap<>();
    // deps[aspect] contains all aspects that 'aspect' needs, in reverse order.
    for (Entry<AspectDescriptor, Aspect> aspect : ImmutableList.copyOf(aspectMap.entrySet()).reverse()) {
        boolean needed = visibleAspects.contains(aspect.getKey());
        for (AspectDescriptor depAspectDescriptor : deps.keySet()) {
            if (depAspectDescriptor.equals(aspect.getKey())) {
                continue;
            }
            Aspect depAspect = aspectMap.get(depAspectDescriptor);
            if (depAspect.getDefinition().getRequiredProvidersForAspects().isSatisfiedBy(aspect.getValue().getDefinition().getAdvertisedProviders())) {
                deps.get(depAspectDescriptor).add(aspect.getKey());
                needed = true;
            }
        }
        if (needed && !deps.containsKey(aspect.getKey())) {
            deps.put(aspect.getKey(), new ArrayList<AspectDescriptor>());
        }
    }
    // Record only the needed aspects from all aspects, in correct order.
    ImmutableList<AspectDescriptor> neededAspects = ImmutableList.copyOf(deps.keySet()).reverse();
    // Calculate visible aspect paths.
    HashMap<AspectDescriptor, AspectDeps> aspectPaths = new HashMap<>();
    ImmutableSet.Builder<AspectDeps> visibleAspectPaths = ImmutableSet.builder();
    for (AspectDescriptor visibleAspect : visibleAspects) {
        visibleAspectPaths.add(buildAspectDeps(visibleAspect, aspectPaths, deps));
    }
    return new AspectCollection(ImmutableSet.copyOf(neededAspects), visibleAspectPaths.build());
}

Example 2 with Aspect

use of com.google.devtools.build.lib.packages.Aspect in project bazel by bazelbuild.

the class DependencyResolver method collectOriginatingAspects.

/**
   * Collect all aspects that originate on {@code attribute} of {@code originalRule}
   * and are applicable to a {@code target}
   *
   * They are appended to {@code filteredAspectPath} and registered in {@code visibleAspects} set.
   */
private static void collectOriginatingAspects(Rule originalRule, Attribute attribute, Rule target, ImmutableList.Builder<Aspect> filteredAspectPath, ImmutableSet.Builder<AspectDescriptor> visibleAspects) {
    ImmutableList<Aspect> baseAspects = attribute.getAspects(originalRule);
    RuleClass ruleClass = target.getRuleClassObject();
    for (Aspect baseAspect : baseAspects) {
        if (baseAspect.getDefinition().getRequiredProviders().isSatisfiedBy(ruleClass.getAdvertisedProviders())) {
            filteredAspectPath.add(baseAspect);
            visibleAspects.add(baseAspect.getDescriptor());
        }
    }
}

Example 3 with Aspect

use of com.google.devtools.build.lib.packages.Aspect in project bazel by bazelbuild.

the class AspectFunction method compute.

@Nullable
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws AspectFunctionException, InterruptedException {
    SkyframeBuildView view = buildViewProvider.getSkyframeBuildView();
    NestedSetBuilder<Package> transitivePackages = NestedSetBuilder.stableOrder();
    NestedSetBuilder<Label> transitiveRootCauses = NestedSetBuilder.stableOrder();
    AspectKey key = (AspectKey) skyKey.argument();
    ConfiguredAspectFactory aspectFactory;
    Aspect aspect;
    if (key.getAspectClass() instanceof NativeAspectClass) {
        NativeAspectClass nativeAspectClass = (NativeAspectClass) key.getAspectClass();
        aspectFactory = (ConfiguredAspectFactory) nativeAspectClass;
        aspect = Aspect.forNative(nativeAspectClass, key.getParameters());
    } else if (key.getAspectClass() instanceof SkylarkAspectClass) {
        SkylarkAspectClass skylarkAspectClass = (SkylarkAspectClass) key.getAspectClass();
        SkylarkAspect skylarkAspect;
        try {
            skylarkAspect = loadSkylarkAspect(env, skylarkAspectClass.getExtensionLabel(), skylarkAspectClass.getExportedName());
        } catch (AspectCreationException e) {
            throw new AspectFunctionException(e);
        }
        if (skylarkAspect == null) {
            return null;
        }
        aspectFactory = new SkylarkAspectFactory(skylarkAspect);
        aspect = Aspect.forSkylark(skylarkAspect.getAspectClass(), skylarkAspect.getDefinition(key.getParameters()), key.getParameters());
    } else {
        throw new IllegalStateException();
    }
    // Keep this in sync with the same code in ConfiguredTargetFunction.
    PackageValue packageValue = (PackageValue) env.getValue(PackageValue.key(key.getLabel().getPackageIdentifier()));
    if (packageValue == null) {
        return null;
    }
    Package pkg = packageValue.getPackage();
    if (pkg.containsErrors()) {
        throw new AspectFunctionException(new BuildFileContainsErrorsException(key.getLabel().getPackageIdentifier()));
    }
    Target target;
    try {
        target = pkg.getTarget(key.getLabel().getName());
    } catch (NoSuchTargetException e) {
        throw new AspectFunctionException(e);
    }
    if (!(target instanceof Rule)) {
        env.getListener().handle(Event.error(target.getLocation(), String.format("%s is attached to %s %s but aspects must be attached to rules", aspect.getAspectClass().getName(), target.getTargetKind(), target.getName())));
        throw new AspectFunctionException(new AspectCreationException("aspects must be attached to rules"));
    }
    ConfiguredTargetValue configuredTargetValue;
    try {
        configuredTargetValue = (ConfiguredTargetValue) env.getValueOrThrow(ConfiguredTargetValue.key(key.getLabel(), key.getBaseConfiguration()), ConfiguredValueCreationException.class);
    } catch (ConfiguredValueCreationException e) {
        throw new AspectFunctionException(new AspectCreationException(e.getRootCauses()));
    }
    if (configuredTargetValue == null) {
        // precomputed.
        return null;
    }
    if (configuredTargetValue.getConfiguredTarget() == null) {
        return null;
    }
    if (configuredTargetValue.getConfiguredTarget().getProvider(AliasProvider.class) != null) {
        return createAliasAspect(env, target, aspect, key, configuredTargetValue.getConfiguredTarget());
    }
    ConfiguredTarget associatedTarget = configuredTargetValue.getConfiguredTarget();
    ImmutableList.Builder<Aspect> aspectPathBuilder = ImmutableList.builder();
    if (!key.getBaseKeys().isEmpty()) {
        // We transitively collect all required aspects to reduce the number of restarts.
        // Semantically it is enough to just request key.getBaseKeys().
        ImmutableMap<AspectDescriptor, SkyKey> aspectKeys = getSkyKeysForAspects(key.getBaseKeys());
        Map<SkyKey, SkyValue> values = env.getValues(aspectKeys.values());
        if (env.valuesMissing()) {
            return null;
        }
        try {
            associatedTarget = getBaseTargetAndCollectPath(associatedTarget, key.getBaseKeys(), values, aspectPathBuilder);
        } catch (DuplicateException e) {
            env.getListener().handle(Event.error(associatedTarget.getTarget().getLocation(), e.getMessage()));
            throw new AspectFunctionException(new AspectCreationException(e.getMessage(), associatedTarget.getLabel()));
        }
    }
    aspectPathBuilder.add(aspect);
    SkyframeDependencyResolver resolver = view.createDependencyResolver(env);
    // When getting the dependencies of this hybrid aspect+base target, use the aspect's
    // configuration. The configuration of the aspect will always be a superset of the target's
    // (dynamic configuration mode: target is part of the aspect's config fragment requirements;
    // static configuration mode: target is the same configuration as the aspect), so the fragments
    // required by all dependencies (both those of the aspect and those of the base target)
    // will be present this way.
    TargetAndConfiguration originalTargetAndAspectConfiguration = new TargetAndConfiguration(target, key.getAspectConfiguration());
    ImmutableList<Aspect> aspectPath = aspectPathBuilder.build();
    try {
        // Get the configuration targets that trigger this rule's configurable attributes.
        ImmutableMap<Label, ConfigMatchingProvider> configConditions = ConfiguredTargetFunction.getConfigConditions(target, env, resolver, originalTargetAndAspectConfiguration, transitivePackages, transitiveRootCauses);
        if (configConditions == null) {
            // Those targets haven't yet been resolved.
            return null;
        }
        OrderedSetMultimap<Attribute, ConfiguredTarget> depValueMap;
        try {
            depValueMap = ConfiguredTargetFunction.computeDependencies(env, resolver, originalTargetAndAspectConfiguration, aspectPath, configConditions, ruleClassProvider, view.getHostConfiguration(originalTargetAndAspectConfiguration.getConfiguration()), transitivePackages, transitiveRootCauses);
        } catch (ConfiguredTargetFunctionException e) {
            throw new AspectCreationException(e.getMessage());
        }
        if (depValueMap == null) {
            return null;
        }
        if (!transitiveRootCauses.isEmpty()) {
            throw new AspectFunctionException(new AspectCreationException("Loading failed", transitiveRootCauses.build()));
        }
        return createAspect(env, key, aspectPath, aspect, aspectFactory, associatedTarget, key.getAspectConfiguration(), configConditions, depValueMap, transitivePackages);
    } catch (DependencyEvaluationException e) {
        if (e.getCause() instanceof ConfiguredValueCreationException) {
            ConfiguredValueCreationException cause = (ConfiguredValueCreationException) e.getCause();
            throw new AspectFunctionException(new AspectCreationException(cause.getMessage(), cause.getAnalysisRootCause()));
        } else if (e.getCause() instanceof InconsistentAspectOrderException) {
            InconsistentAspectOrderException cause = (InconsistentAspectOrderException) e.getCause();
            throw new AspectFunctionException(new AspectCreationException(cause.getMessage()));
        } 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()));
        }
    } catch (AspectCreationException e) {
        throw new AspectFunctionException(e);
    }
}

Example 4 with Aspect

use of com.google.devtools.build.lib.packages.Aspect in project bazel by bazelbuild.

the class AspectCollectionTest method recursiveNonVisible.

/**
   * a2 (non-visible aspect) wants itself, a3 wants a2.
   */
@Test
public void recursiveNonVisible() throws Exception {
    Aspect a1 = createAspect("a1");
    Aspect a2 = createAspect("a2", "a2");
    Aspect a3 = createAspect("a3", "a2");
    AspectCollection collection = AspectCollection.create(ImmutableList.of(a1, a2, a3), ImmutableSet.of(a3.getDescriptor()));
    validateAspectCollection(collection, ImmutableList.of(a2, a3), ImmutableList.of(a3), expectDeps(a3, a2), expectDeps(a2));
}

Example 5 with Aspect

use of com.google.devtools.build.lib.packages.Aspect in project bazel by bazelbuild.

the class AspectCollectionTest method duplicateAspect2a.

/**
   *  a3 wants a1 and a2, a2 does not want a1.
   *  The path is [a2, a1, a2, a3], so a2 occurs twice.
   *  Second occurrence of a2 is consistent with the first.
   */
@Test
public void duplicateAspect2a() throws Exception {
    Aspect a1 = createAspect("a1");
    Aspect a2 = createAspect("a2");
    Aspect a3 = createAspect("a3", "a1", "a2");
    AspectCollection collection = AspectCollection.create(ImmutableList.of(a2, a1, a2, a3), ImmutableSet.of(a3.getDescriptor()));
    validateAspectCollection(collection, ImmutableList.of(a2, a1, a3), ImmutableList.of(a3), expectDeps(a3, a2, a1), expectDeps(a2), expectDeps(a1));
}