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// 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.devtools.build.lib.cmdline.RepositoryName;
import com.google.devtools.build.lib.rules.repository.RepositoryDirectoryValue;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.skyframe.LegacySkyKey;
import com.google.devtools.build.skyframe.SkyKey;
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 SkyKey key(RepositoryName repositoryName) {
return LegacySkyKey.create(SkyFunctions.REPOSITORY, repositoryName);
}
}
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