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// 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.analysis.configuredtargets;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.analysis.FileProvider;
import com.google.devtools.build.lib.analysis.PackageSpecificationProvider;
import com.google.devtools.build.lib.analysis.TargetContext;
import com.google.devtools.build.lib.analysis.TransitiveInfoCollection;
import com.google.devtools.build.lib.analysis.TransitiveInfoProvider;
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.packages.Info;
import com.google.devtools.build.lib.packages.PackageGroup;
import com.google.devtools.build.lib.packages.PackageSpecification.PackageGroupContents;
import com.google.devtools.build.lib.packages.Provider;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec.Instantiator;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec.VisibleForSerialization;
/**
* Dummy ConfiguredTarget for package groups. Contains no functionality, since
* package groups are not really first-class Targets.
*/
public final class PackageGroupConfiguredTarget extends AbstractConfiguredTarget
implements PackageSpecificationProvider {
private static final FileProvider NO_FILES = new FileProvider(
NestedSetBuilder.<Artifact>emptySet(Order.STABLE_ORDER));
private final NestedSet<PackageGroupContents> packageSpecifications;
@VisibleForSerialization
@Instantiator
PackageGroupConfiguredTarget(
Label label,
NestedSet<PackageGroupContents> visibility,
NestedSet<PackageGroupContents> packageSpecifications) {
super(label, null, visibility);
this.packageSpecifications = packageSpecifications;
}
public PackageGroupConfiguredTarget(TargetContext targetContext, PackageGroup packageGroup) {
this(
targetContext.getLabel(),
targetContext.getVisibility(),
getPackageSpecifications(targetContext, packageGroup));
}
private static NestedSet<PackageGroupContents> getPackageSpecifications(
TargetContext targetContext, PackageGroup packageGroup) {
NestedSetBuilder<PackageGroupContents> builder = NestedSetBuilder.stableOrder();
for (Label label : packageGroup.getIncludes()) {
TransitiveInfoCollection include = targetContext.maybeFindDirectPrerequisite(
label, targetContext.getConfiguration());
PackageSpecificationProvider provider = include == null ? null
: include.getProvider(PackageSpecificationProvider.class);
if (provider == null) {
targetContext
.getAnalysisEnvironment()
.getEventHandler()
.handle(
Event.error(
targetContext.getTarget().getLocation(),
String.format("label '%s' does not refer to a package group", label)));
continue;
}
builder.addTransitive(provider.getPackageSpecifications());
}
builder.add(packageGroup.getPackageSpecifications());
return builder.build();
}
@Override
public NestedSet<PackageGroupContents> getPackageSpecifications() {
return packageSpecifications;
}
@Override
public <P extends TransitiveInfoProvider> P getProvider(Class<P> provider) {
if (provider == FileProvider.class) {
return (P) NO_FILES;
} else {
return super.getProvider(provider);
}
}
@Override
protected Info rawGetSkylarkProvider(Provider.Key providerKey) {
return null;
}
@Override
protected Object rawGetSkylarkProvider(String providerKey) {
return null;
}
}
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