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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.analysis.BlazeDirectories;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration.Fragment;
import com.google.devtools.build.lib.analysis.config.BuildOptions;
import com.google.devtools.build.lib.analysis.config.InvalidConfigurationException;
import com.google.devtools.build.lib.analysis.config.PackageProviderForConfigurations;
import com.google.devtools.build.lib.packages.ExternalPackage;
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.PackageIdentifier;
import com.google.devtools.build.lib.packages.Target;
import com.google.devtools.build.lib.skyframe.SkyframeExecutor.SkyframePackageLoader;
import com.google.devtools.build.lib.syntax.Label;
import com.google.devtools.build.lib.syntax.Label.SyntaxException;
import com.google.devtools.build.lib.vfs.RootedPath;
import com.google.devtools.build.skyframe.MemoizingEvaluator;
import com.google.devtools.build.skyframe.SkyFunction;
import com.google.devtools.build.skyframe.SkyKey;
import java.io.IOException;
import java.util.Set;
/**
* Repeats functionality of {@link SkyframePackageLoader} but uses
* {@link SkyFunction.Environment#getValue} instead of {@link MemoizingEvaluator#evaluate}
* for node evaluation
*/
class SkyframePackageLoaderWithValueEnvironment implements
PackageProviderForConfigurations {
private final SkyFunction.Environment env;
private final Set<Package> packages;
public SkyframePackageLoaderWithValueEnvironment(SkyFunction.Environment env,
Set<Package> packages) {
this.env = env;
this.packages = packages;
}
private Package getPackage(PackageIdentifier pkgIdentifier) throws NoSuchPackageException{
SkyKey key = PackageValue.key(pkgIdentifier);
PackageValue value = (PackageValue) env.getValueOrThrow(key, NoSuchPackageException.class);
if (value != null) {
packages.add(value.getPackage());
return value.getPackage();
}
return null;
}
@Override
public Package getLoadedPackage(final PackageIdentifier pkgIdentifier)
throws NoSuchPackageException {
try {
return getPackage(pkgIdentifier);
} catch (NoSuchPackageException e) {
if (e.getPackage() != null) {
return e.getPackage();
}
throw e;
}
}
@Override
public Target getLoadedTarget(Label label) throws NoSuchPackageException,
NoSuchTargetException {
Package pkg = getLoadedPackage(label.getPackageIdentifier());
if (ExternalPackage.isExternal(pkg)) {
label = ((ExternalPackage) pkg).getActualLabel(label);
if (label != null) {
pkg = getLoadedPackage(label.getPackageIdentifier());
}
}
return pkg == null ? null : pkg.getTarget(label.getName());
}
@Override
public boolean isTargetCurrent(Target target) {
throw new UnsupportedOperationException();
}
@Override
public void addDependency(Package pkg, String fileName) throws SyntaxException, IOException {
RootedPath fileRootedPath = RootedPath.toRootedPath(pkg.getSourceRoot(),
pkg.getNameFragment().getRelative(fileName));
FileValue result = (FileValue) env.getValue(FileValue.key(fileRootedPath));
if (result != null && !result.exists()) {
throw new IOException();
}
}
@SuppressWarnings("unchecked")
@Override
public <T extends Fragment> T getFragment(BuildOptions buildOptions, Class<T> fragmentType)
throws InvalidConfigurationException {
ConfigurationFragmentValue fragmentNode = (ConfigurationFragmentValue) env.getValueOrThrow(
ConfigurationFragmentValue.key(buildOptions, fragmentType),
InvalidConfigurationException.class);
if (fragmentNode == null) {
return null;
}
return (T) fragmentNode.getFragment();
}
@Override
public BlazeDirectories getDirectories() {
return PrecomputedValue.BLAZE_DIRECTORIES.get(env);
}
@Override
public boolean valuesMissing() {
return env.valuesMissing();
}
}
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