| // Copyright 2014 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.config; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.devtools.build.lib.buildtool.BuildRequestOptions; |
| import com.google.devtools.build.lib.concurrent.ThreadSafety.ThreadSafe; |
| import java.util.HashMap; |
| |
| /** |
| * Convenience container for top-level target and host configurations. |
| * |
| * <p>The target configuration is used for all targets specified on the command line. Multiple |
| * target configurations are possible because of settings like {@link |
| * BuildRequestOptions#multiCpus}. |
| * |
| * <p>The host configuration is used for tools that are executed during the build, e. g, compilers. |
| */ |
| @ThreadSafe |
| public final class BuildConfigurationCollection { |
| private final ImmutableList<BuildConfiguration> targetConfigurations; |
| private final BuildConfiguration hostConfiguration; |
| |
| public BuildConfigurationCollection( |
| ImmutableList<BuildConfiguration> targetConfigurations, BuildConfiguration hostConfiguration) |
| throws InvalidConfigurationException { |
| this.targetConfigurations = targetConfigurations; |
| this.hostConfiguration = hostConfiguration; |
| |
| // Except for the host configuration (which may be identical across target configs), the other |
| // configurations must all have different cache keys or we will end up with problems. |
| HashMap<String, BuildConfiguration> cacheKeyConflictDetector = new HashMap<>(); |
| for (BuildConfiguration config : targetConfigurations) { |
| BuildConfiguration old = cacheKeyConflictDetector.put(config.checksum(), config); |
| if (old != null) { |
| throw new InvalidConfigurationException( |
| "Conflicting configurations: " + config + " & " + old); |
| } |
| } |
| } |
| |
| public ImmutableList<BuildConfiguration> getTargetConfigurations() { |
| return targetConfigurations; |
| } |
| |
| /** |
| * Returns the host configuration for this collection. |
| * |
| * <p>Don't use this method. It's limited in that it assumes a single host configuration for the |
| * entire collection. This may not be true in the future and more flexible interfaces will likely |
| * supplant this interface anyway. |
| */ |
| public BuildConfiguration getHostConfiguration() { |
| return hostConfiguration; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (!(obj instanceof BuildConfigurationCollection)) { |
| return false; |
| } |
| BuildConfigurationCollection that = (BuildConfigurationCollection) obj; |
| return this.targetConfigurations.equals(that.targetConfigurations); |
| } |
| |
| @Override |
| public int hashCode() { |
| return targetConfigurations.hashCode(); |
| } |
| } |