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// Copyright 2015 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.skyframe;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.devtools.build.lib.analysis.BlazeDirectories;
import com.google.devtools.build.lib.cmdline.RepositoryName;
import com.google.devtools.build.lib.cmdline.ResolvedTargets;
import com.google.devtools.build.lib.packages.NoSuchPackageException;
import com.google.devtools.build.lib.packages.NoSuchTargetException;
import com.google.devtools.build.lib.packages.Package;
import com.google.devtools.build.lib.packages.Target;
import com.google.devtools.build.lib.pkgcache.FilteringPolicy;
import com.google.devtools.build.lib.pkgcache.TargetPatternResolverUtil;
import com.google.devtools.build.lib.skyframe.PrepareDepsOfTargetsUnderDirectoryValue.PrepareDepsOfTargetsUnderDirectoryKey;
import com.google.devtools.build.lib.skyframe.RecursivePkgValue.RecursivePkgKey;
import com.google.devtools.build.lib.util.Preconditions;
import com.google.devtools.build.lib.vfs.PathFragment;
import com.google.devtools.build.lib.vfs.RootedPath;
import com.google.devtools.build.skyframe.SkyFunction;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import java.util.Map;
import javax.annotation.Nullable;
/**
* Ensures the graph contains the targets in the directory's package, if any, and in the
* non-excluded packages in its subdirectories, and all those targets' transitive dependencies,
* after a successful evaluation.
*/
public class PrepareDepsOfTargetsUnderDirectoryFunction implements SkyFunction {
private final BlazeDirectories directories;
public PrepareDepsOfTargetsUnderDirectoryFunction(BlazeDirectories directories) {
this.directories = directories;
}
@Override
public SkyValue compute(SkyKey skyKey, Environment env) {
PrepareDepsOfTargetsUnderDirectoryKey argument =
(PrepareDepsOfTargetsUnderDirectoryKey) skyKey.argument();
FilteringPolicy filteringPolicy = argument.getFilteringPolicy();
RecursivePkgKey recursivePkgKey = argument.getRecursivePkgKey();
return new MyTraversalFunction(filteringPolicy).visitDirectory(recursivePkgKey, env);
}
private class MyTraversalFunction
extends RecursiveDirectoryTraversalFunction<
MyVisitor, PrepareDepsOfTargetsUnderDirectoryValue> {
private final FilteringPolicy filteringPolicy;
private MyTraversalFunction(FilteringPolicy filteringPolicy) {
super(directories);
this.filteringPolicy = filteringPolicy;
}
@Override
protected PrepareDepsOfTargetsUnderDirectoryValue getEmptyReturn() {
return PrepareDepsOfTargetsUnderDirectoryValue.INSTANCE;
}
@Override
protected MyVisitor getInitialVisitor() {
return new MyVisitor(filteringPolicy);
}
@Override
protected SkyKey getSkyKeyForSubdirectory(
RepositoryName repository,
RootedPath subdirectory,
ImmutableSet<PathFragment> excludedSubdirectoriesBeneathSubdirectory) {
return PrepareDepsOfTargetsUnderDirectoryValue.key(
repository, subdirectory, excludedSubdirectoriesBeneathSubdirectory, filteringPolicy);
}
@Override
protected PrepareDepsOfTargetsUnderDirectoryValue aggregateWithSubdirectorySkyValues(
MyVisitor visitor, Map<SkyKey, SkyValue> subdirectorySkyValues) {
return PrepareDepsOfTargetsUnderDirectoryValue.INSTANCE;
}
}
private static class MyVisitor implements RecursiveDirectoryTraversalFunction.Visitor {
private final FilteringPolicy filteringPolicy;
private MyVisitor(FilteringPolicy filteringPolicy) {
this.filteringPolicy = Preconditions.checkNotNull(filteringPolicy);
}
@Override
public void visitPackageValue(Package pkg, Environment env) {
loadTransitiveTargets(env, pkg, filteringPolicy);
}
}
private static void loadTransitiveTargets(
Environment env, Package pkg, FilteringPolicy filteringPolicy) {
ResolvedTargets<Target> packageTargets =
TargetPatternResolverUtil.resolvePackageTargets(pkg, filteringPolicy);
ImmutableList.Builder<SkyKey> builder = ImmutableList.builder();
for (Target target : packageTargets.getTargets()) {
builder.add(TransitiveTraversalValue.key(target.getLabel()));
}
ImmutableList<SkyKey> skyKeys = builder.build();
env.getValuesOrThrow(skyKeys, NoSuchPackageException.class, NoSuchTargetException.class);
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
}
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