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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.query2.output;
import com.google.common.collect.ImmutableMultimap;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.events.EventHandler;
import com.google.devtools.build.lib.packages.Attribute;
import com.google.devtools.build.lib.packages.Package;
import com.google.devtools.build.lib.packages.Target;
import com.google.devtools.build.lib.pkgcache.PackageProvider;
import java.util.Collection;
import java.util.Set;
/** Utility class that determines additional dependencies of a target from its aspects. */
public interface AspectResolver {
/**
* How to resolve aspect dependencies in 'blaze query'.
*/
public enum Mode {
// Do not report aspect dependencies
OFF {
@Override
public AspectResolver createResolver(PackageProvider provider, EventHandler eventHandler) {
return new NullAspectResolver();
}
},
// Do not load dependent packages; report deps assuming all aspects defined on a rule are
// triggered
CONSERVATIVE {
@Override
public AspectResolver createResolver(PackageProvider provider, EventHandler eventHandler) {
return new ConservativeAspectResolver();
}
},
// Load direct dependencies and report aspects that can be triggered based on their types.
PRECISE {
@Override
public AspectResolver createResolver(PackageProvider provider, EventHandler eventHandler) {
return new PreciseAspectResolver(provider, eventHandler);
}
};
public abstract AspectResolver createResolver(
PackageProvider provider, EventHandler eventHandler);
}
/** The way aspect dependencies for a BUILD file are calculated. */
enum BuildFileDependencyMode {
/** Return all the subincluded files that may affect the package. */
SUBINCLUDE {
@Override
protected Collection<Label> getDependencies(Package pkg) {
return pkg.getSubincludeLabels();
}
},
/** Return all Skylark files that may affect the package. */
SKYLARK {
@Override
protected Collection<Label> getDependencies(Package pkg) {
return pkg.getSkylarkFileDependencies();
}
};
protected abstract Collection<Label> getDependencies(Package pkg);
}
/**
* Compute additional dependencies of target from aspects. This method may load the direct deps
* of target to determine their types. Returns map of attributes and corresponding label values.
*/
ImmutableMultimap<Attribute, Label> computeAspectDependencies(Target target)
throws InterruptedException;
/**
* Compute the labels of the BUILD and subinclude and Skylark files on which the results of the
* other two methods depend for a target in the given package.
*/
Set<Label> computeBuildFileDependencies(Package pkg, BuildFileDependencyMode mode)
throws InterruptedException;
}
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