// Copyright 2016 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.rules; import com.google.common.collect.ImmutableCollection; import com.google.common.collect.ImmutableList; import com.google.common.collect.ImmutableMap; import com.google.devtools.build.lib.actions.Artifact; import com.google.devtools.build.lib.analysis.ConfiguredTarget; import com.google.devtools.build.lib.analysis.FileProvider; import com.google.devtools.build.lib.analysis.SkylarkProviders; import com.google.devtools.build.lib.analysis.TransitiveInfoProvider; import com.google.devtools.build.lib.analysis.config.BuildConfiguration; import com.google.devtools.build.lib.cmdline.Label; import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder; import com.google.devtools.build.lib.collect.nestedset.Order; import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable; import com.google.devtools.build.lib.events.Location; import com.google.devtools.build.lib.packages.ClassObjectConstructor; import com.google.devtools.build.lib.packages.SkylarkClassObject; import com.google.devtools.build.lib.packages.SkylarkProviderIdentifier; import com.google.devtools.build.lib.packages.Target; import com.google.devtools.build.lib.syntax.ClassObject; import com.google.devtools.build.lib.syntax.EvalException; import com.google.devtools.build.lib.syntax.SkylarkNestedSet; import com.google.devtools.build.lib.util.Preconditions; import javax.annotation.Nullable; /** * This configured target pretends to be whatever type of target "actual" is, returning its * transitive info providers and target, but returning its own label. * *
Transitive info providers can also be overridden.
*/
@Immutable
public final class AliasConfiguredTarget implements ConfiguredTarget, ClassObject {
private final BuildConfiguration configuration;
private final ConfiguredTarget actual;
private final ImmutableMap P getProvider(Class provider) {
if (overrides.containsKey(provider)) {
return provider.cast(overrides.get(provider));
}
return actual == null ? null : actual.getProvider(provider);
}
@Override
public Label getLabel() {
return actual.getLabel();
}
@Override
public Object get(String providerKey) {
return actual == null ? null : actual.get(providerKey);
}
@Nullable
@Override
public SkylarkClassObject get(ClassObjectConstructor.Key providerKey) {
return actual == null ? null : actual.get(providerKey);
}
@Nullable
@Override
public Object get(SkylarkProviderIdentifier id) {
return actual == null ? null : actual.get(id);
}
@Override
public Object getIndex(Object key, Location loc) throws EvalException {
return actual == null ? null : actual.getIndex(key, loc);
}
@Override
public boolean containsKey(Object key, Location loc) throws EvalException {
return actual != null && actual.containsKey(key, loc);
}
@Override
public Target getTarget() {
return actual == null ? null : actual.getTarget();
}
@Override
public BuildConfiguration getConfiguration() {
// This does not return actual.getConfiguration() because actual might be an input file, in
// which case its configuration is null and we don't want to have rules that have a null
// configuration.
return configuration;
}
/* ClassObject methods */
@Override
public Object getValue(String name) {
if (name.equals(LABEL_FIELD)) {
return getLabel();
} else if (name.equals(FILES_FIELD)) {
// A shortcut for files to build in Skylark. FileConfiguredTarget and RuleConfiguredTarget
// always has FileProvider and Error- and PackageGroupConfiguredTarget-s shouldn't be
// accessible in Skylark.
return SkylarkNestedSet.of(Artifact.class, actual == null
? NestedSetBuilder.