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// 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.devtools.build.lib.packages.PackageIdentifier;
import com.google.devtools.build.lib.vfs.PathFragment;
import com.google.devtools.build.skyframe.SkyFunction;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import javax.annotation.Nullable;
/**
* SkyFunction for {@link ContainingPackageLookupValue}s.
*/
public class ContainingPackageLookupFunction implements SkyFunction {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) {
PackageIdentifier dir = (PackageIdentifier) skyKey.argument();
PackageLookupValue pkgLookupValue = null;
pkgLookupValue = (PackageLookupValue) env.getValue(PackageLookupValue.key(dir));
if (pkgLookupValue == null) {
return null;
}
if (pkgLookupValue.packageExists()) {
return ContainingPackageLookupValue.withContainingPackage(dir, pkgLookupValue.getRoot());
}
PathFragment parentDir = dir.getPackageFragment().getParentDirectory();
if (parentDir == null) {
return ContainingPackageLookupValue.noContainingPackage();
}
PackageIdentifier parentId = new PackageIdentifier(dir.getRepository(), parentDir);
return env.getValue(ContainingPackageLookupValue.key(parentId));
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
}
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