| // Copyright 2016 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.base.Objects; |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.Interner; |
| import com.google.devtools.build.lib.cmdline.RepositoryName; |
| import com.google.devtools.build.lib.concurrent.BlazeInterners; |
| import com.google.devtools.build.lib.rules.repository.RepositoryDirectoryValue; |
| import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec; |
| import com.google.devtools.build.lib.vfs.Path; |
| import com.google.devtools.build.skyframe.AbstractSkyKey; |
| import com.google.devtools.build.skyframe.SkyFunctionName; |
| import com.google.devtools.build.skyframe.SkyValue; |
| |
| /** A repository's name and directory. */ |
| public abstract class RepositoryValue implements SkyValue { |
| public abstract boolean repositoryExists(); |
| |
| /** Returns the path to the repository. */ |
| public abstract Path getPath(); |
| |
| /** Successful lookup value. */ |
| public static final class SuccessfulRepositoryValue extends RepositoryValue { |
| private final RepositoryName repositoryName; |
| private final RepositoryDirectoryValue repositoryDirectory; |
| |
| /** Creates a repository with a given name in a certain directory. */ |
| public SuccessfulRepositoryValue( |
| RepositoryName repositoryName, RepositoryDirectoryValue repository) { |
| Preconditions.checkArgument(repository.repositoryExists()); |
| this.repositoryName = repositoryName; |
| this.repositoryDirectory = repository; |
| } |
| |
| @Override |
| public boolean repositoryExists() { |
| return true; |
| } |
| |
| @Override |
| public Path getPath() { |
| return repositoryDirectory.getPath(); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (this == other) { |
| return true; |
| } |
| if (other == null || getClass() != other.getClass()) { |
| return false; |
| } |
| |
| SuccessfulRepositoryValue that = (SuccessfulRepositoryValue) other; |
| return Objects.equal(repositoryName, that.repositoryName) |
| && Objects.equal(repositoryDirectory, that.repositoryDirectory); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(repositoryName, repositoryDirectory); |
| } |
| } |
| |
| /** Repository could not be resolved. */ |
| public static final class NoRepositoryValue extends RepositoryValue { |
| private final RepositoryName repositoryName; |
| |
| private NoRepositoryValue(RepositoryName repositoryName) { |
| this.repositoryName = repositoryName; |
| } |
| |
| @Override |
| public boolean repositoryExists() { |
| return false; |
| } |
| |
| @Override |
| public Path getPath() { |
| throw new IllegalStateException(); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (this == other) { |
| return true; |
| } |
| if (other == null || getClass() != other.getClass()) { |
| return false; |
| } |
| |
| NoRepositoryValue that = (NoRepositoryValue) other; |
| return Objects.equal(repositoryName, that.repositoryName); |
| } |
| |
| @Override |
| public int hashCode() { |
| return repositoryName.hashCode(); |
| } |
| } |
| |
| public static RepositoryValue success( |
| RepositoryName repositoryName, RepositoryDirectoryValue repository) { |
| return new SuccessfulRepositoryValue(repositoryName, repository); |
| } |
| |
| public static RepositoryValue notFound(RepositoryName repositoryName) { |
| // TODO(ulfjack): Store the cause here? The two possible causes are that the external package |
| // contains errors, or that the repository with the given name does not exist. |
| return new NoRepositoryValue(repositoryName); |
| } |
| |
| public static Key key(RepositoryName repositoryName) { |
| return Key.create(repositoryName); |
| } |
| |
| @AutoCodec.VisibleForSerialization |
| @AutoCodec |
| static class Key extends AbstractSkyKey<RepositoryName> { |
| private static final Interner<Key> interner = BlazeInterners.newWeakInterner(); |
| |
| private Key(RepositoryName arg) { |
| super(arg); |
| } |
| |
| @AutoCodec.VisibleForSerialization |
| @AutoCodec.Instantiator |
| static Key create(RepositoryName arg) { |
| return interner.intern(new Key(arg)); |
| } |
| |
| @Override |
| public SkyFunctionName functionName() { |
| return SkyFunctions.REPOSITORY; |
| } |
| } |
| } |