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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.analysis;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.base.Strings;
import com.google.common.hash.HashCode;
import com.google.common.hash.Hashing;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec;
import com.google.devtools.build.lib.vfs.Path;
import java.util.Objects;
import javax.annotation.Nullable;
/**
* Represents the relevant directories for the server: the location of the embedded binaries
* and the output directories.
*/
@AutoCodec
@Immutable
public final class ServerDirectories {
/** Top-level user output directory; used, e.g., as default location for caches. */
private final Path outputUserRoot;
/** Where Blaze gets unpacked. */
private final Path installBase;
/** The content hash of everything in installBase. */
@Nullable private final HashCode installMD5;
/** The root of the temp and output trees. */
private final Path outputBase;
public ServerDirectories(
Path installBase, Path outputBase, Path outputUserRoot, @Nullable String installMD5) {
this(
installBase,
outputBase,
outputUserRoot,
Strings.isNullOrEmpty(installMD5) ? null : checkMD5(HashCode.fromString(installMD5)));
}
@AutoCodec.Instantiator
ServerDirectories(Path installBase, Path outputBase, Path outputUserRoot, HashCode installMD5) {
this.outputUserRoot = outputUserRoot;
this.installBase = installBase;
this.outputBase = outputBase;
this.installMD5 = installMD5;
}
public ServerDirectories(Path installBase, Path outputBase, Path outputUserRoot) {
this(installBase, outputBase, outputUserRoot, (HashCode) null);
}
private static HashCode checkMD5(HashCode hash) {
Preconditions.checkArgument(
hash.bits() == Hashing.md5().bits(), "Hash '%s' has %s bits", hash, hash.bits());
return hash;
}
/** Returns the installation base directory. */
public Path getInstallBase() {
return installBase;
}
/**
* Returns the base of the output tree, which hosts all build and scratch output for a user and
* workspace.
*/
public Path getOutputBase() {
return outputBase;
}
/**
* Returns the root directory for user output. In particular default caches will be located here.
*/
public Path getOutputUserRoot() {
return outputUserRoot;
}
/** Returns the installed embedded binaries directory, under the shared installBase location. */
public Path getEmbeddedBinariesRoot() {
return getEmbeddedBinariesRoot(installBase);
}
@VisibleForTesting
public static Path getEmbeddedBinariesRoot(Path installBase) {
return installBase.getChild("_embedded_binaries");
}
/**
* Returns the MD5 content hash of the blaze binary (includes deploy JAR, embedded binaries, and
* anything else that ends up in the install_base).
*/
public HashCode getInstallMD5() {
return installMD5;
}
@Override
public int hashCode() {
return Objects.hash(installBase, installMD5, outputBase, outputUserRoot);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof ServerDirectories)) {
return false;
}
ServerDirectories that = (ServerDirectories) obj;
return this.installBase.equals(that.installBase)
&& Objects.equals(this.installMD5, that.installMD5)
&& this.outputBase.equals(that.outputBase)
&& this.outputUserRoot.equals(that.outputUserRoot);
}
}
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