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// Copyright 2018 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.ImmutableMap;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.cmdline.RepositoryName;
import com.google.devtools.build.lib.packages.BuildFileContainsErrorsException;
import com.google.devtools.build.lib.packages.Package;
import com.google.devtools.build.skyframe.SkyFunction;
import com.google.devtools.build.skyframe.SkyFunctionException;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import javax.annotation.Nullable;
/** {@link SkyFunction} for {@link RepositoryMappingValue}s. */
public class RepositoryMappingFunction implements SkyFunction {
@Nullable
@Override
public SkyValue compute(SkyKey skyKey, Environment env)
throws SkyFunctionException, InterruptedException {
SkyKey externalPackageKey = PackageValue.key(Label.EXTERNAL_PACKAGE_IDENTIFIER);
PackageValue externalPackageValue = (PackageValue) env.getValue(externalPackageKey);
if (env.valuesMissing()) {
return null;
}
Package externalPackage = externalPackageValue.getPackage();
if (externalPackage.containsErrors()) {
throw new RepositoryMappingFunctionException();
}
ImmutableMap<RepositoryName, RepositoryName> mapping =
externalPackage.getRepositoryMapping((RepositoryName) skyKey.argument());
return RepositoryMappingValue.withMapping(mapping);
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
private class RepositoryMappingFunctionException extends SkyFunctionException {
RepositoryMappingFunctionException() {
super(
new BuildFileContainsErrorsException(Label.EXTERNAL_PACKAGE_IDENTIFIER),
Transience.PERSISTENT);
}
}
}
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