Update from Google.
--
MOE_MIGRATED_REVID=85702957
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/AspectFunction.java b/src/main/java/com/google/devtools/build/lib/skyframe/AspectFunction.java
new file mode 100644
index 0000000..f1aa2f6e
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/AspectFunction.java
@@ -0,0 +1,187 @@
+// Copyright 2014 Google Inc. 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.Preconditions;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ListMultimap;
+import com.google.devtools.build.lib.analysis.Aspect;
+import com.google.devtools.build.lib.analysis.CachingAnalysisEnvironment;
+import com.google.devtools.build.lib.analysis.ConfiguredAspectFactory;
+import com.google.devtools.build.lib.analysis.ConfiguredTarget;
+import com.google.devtools.build.lib.analysis.RuleConfiguredTarget;
+import com.google.devtools.build.lib.analysis.TargetAndConfiguration;
+import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
+import com.google.devtools.build.lib.analysis.config.ConfigMatchingProvider;
+import com.google.devtools.build.lib.events.StoredEventHandler;
+import com.google.devtools.build.lib.packages.AspectFactory;
+import com.google.devtools.build.lib.packages.Attribute;
+import com.google.devtools.build.lib.packages.NoSuchTargetException;
+import com.google.devtools.build.lib.packages.Rule;
+import com.google.devtools.build.lib.packages.Target;
+import com.google.devtools.build.lib.skyframe.AspectValue.AspectKey;
+import com.google.devtools.build.lib.skyframe.ConfiguredTargetFunction.DependencyEvaluationException;
+import com.google.devtools.build.lib.skyframe.SkyframeExecutor.BuildViewProvider;
+import com.google.devtools.build.skyframe.SkyFunction;
+import com.google.devtools.build.skyframe.SkyFunctionException;
+import com.google.devtools.build.skyframe.SkyKey;
+import com.google.devtools.build.skyframe.SkyValue;
+
+import java.util.Set;
+
+import javax.annotation.Nullable;
+
+/**
+ * The Skyframe function that generates aspects.
+ */
+public final class AspectFunction implements SkyFunction {
+ private final BuildViewProvider buildViewProvider;
+
+ public AspectFunction(BuildViewProvider buildViewProvider) {
+ this.buildViewProvider = buildViewProvider;
+ }
+
+ @Nullable
+ @Override
+ public SkyValue compute(SkyKey skyKey, Environment env)
+ throws AspectFunctionException {
+ SkyframeBuildView view = buildViewProvider.getSkyframeBuildView();
+ AspectKey key = (AspectKey) skyKey.argument();
+ ConfiguredAspectFactory aspectFactory =
+ (ConfiguredAspectFactory) AspectFactory.Util.create(key.getAspect());
+
+ PackageValue packageValue =
+ (PackageValue) env.getValue(PackageValue.key(key.getLabel().getPackageIdentifier()));
+ if (packageValue == null) {
+ return null;
+ }
+
+ Target target;
+ try {
+ target = packageValue.getPackage().getTarget(key.getLabel().getName());
+ } catch (NoSuchTargetException e) {
+ throw new AspectFunctionException(skyKey, e);
+ }
+
+ if (!(target instanceof Rule)) {
+ throw new AspectFunctionException(new AspectCreationException(
+ "aspects must be attached to rules"));
+ }
+
+ RuleConfiguredTarget associatedTarget = (RuleConfiguredTarget)
+ ((ConfiguredTargetValue) env.getValue(ConfiguredTargetValue.key(
+ key.getLabel(), key.getConfiguration()))).getConfiguredTarget();
+
+ if (associatedTarget == null) {
+ return null;
+ }
+
+ SkyframeDependencyResolver resolver = view.createDependencyResolver(env);
+ if (resolver == null) {
+ return null;
+ }
+
+ TargetAndConfiguration ctgValue =
+ new TargetAndConfiguration(target, key.getConfiguration());
+
+ try {
+ // Get the configuration targets that trigger this rule's configurable attributes.
+ Set<ConfigMatchingProvider> configConditions =
+ ConfiguredTargetFunction.getConfigConditions(target, env, resolver, ctgValue);
+ if (configConditions == null) {
+ // Those targets haven't yet been resolved.
+ return null;
+ }
+
+ ListMultimap<Attribute, ConfiguredTarget> depValueMap =
+ ConfiguredTargetFunction.computeDependencies(env, resolver, ctgValue,
+ aspectFactory.getDefinition(), configConditions);
+
+ return createAspect(env, key, associatedTarget, configConditions, depValueMap);
+ } catch (DependencyEvaluationException e) {
+ throw new AspectFunctionException(e.getRootCauseSkyKey(), e.getCause());
+ }
+ }
+
+ @Nullable
+ private AspectValue createAspect(Environment env, AspectKey key,
+ RuleConfiguredTarget associatedTarget, Set<ConfigMatchingProvider> configConditions,
+ ListMultimap<Attribute, ConfiguredTarget> directDeps)
+ throws AspectFunctionException {
+ SkyframeBuildView view = buildViewProvider.getSkyframeBuildView();
+ BuildConfiguration configuration = associatedTarget.getConfiguration();
+ boolean extendedSanityChecks = configuration != null && configuration.extendedSanityChecks();
+
+ StoredEventHandler events = new StoredEventHandler();
+ CachingAnalysisEnvironment analysisEnvironment = view.createAnalysisEnvironment(
+ key, false, extendedSanityChecks, events, env, true);
+ if (env.valuesMissing()) {
+ return null;
+ }
+
+ ConfiguredAspectFactory aspectFactory =
+ (ConfiguredAspectFactory) AspectFactory.Util.create(key.getAspect());
+ Aspect aspect = view.createAspect(
+ analysisEnvironment, associatedTarget, aspectFactory, directDeps, configConditions);
+
+ events.replayOn(env.getListener());
+ if (events.hasErrors()) {
+ analysisEnvironment.disable(associatedTarget.getTarget());
+ throw new AspectFunctionException(new AspectCreationException(
+ "Analysis of target '" + associatedTarget.getLabel() + "' failed; build aborted"));
+ }
+ Preconditions.checkState(!analysisEnvironment.hasErrors(),
+ "Analysis environment hasError() but no errors reported");
+
+ if (env.valuesMissing()) {
+ return null;
+ }
+
+ analysisEnvironment.disable(associatedTarget.getTarget());
+ Preconditions.checkNotNull(aspect);
+
+ return new AspectValue(
+ aspect, ImmutableList.copyOf(analysisEnvironment.getRegisteredActions()));
+ }
+
+ @Nullable
+ @Override
+ public String extractTag(SkyKey skyKey) {
+ return null;
+ }
+
+ /**
+ * An exception indicating that there was a problem creating an aspect.
+ */
+ public static final class AspectCreationException extends Exception {
+ public AspectCreationException(String message) {
+ super(message);
+ }
+ }
+
+ /**
+ * Used to indicate errors during the computation of an {@link AspectValue}.
+ */
+ private static final class AspectFunctionException extends SkyFunctionException {
+ public AspectFunctionException(Exception e) {
+ super(e, Transience.PERSISTENT);
+ }
+
+ /** Used to rethrow a child error that we cannot handle. */
+ public AspectFunctionException(SkyKey childKey, Exception transitiveError) {
+ super(transitiveError, childKey);
+ }
+ }
+}
