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// 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.Collection;
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(
Collection<BuildConfiguration> targetConfigurations,
BuildConfiguration hostConfiguration)
throws InvalidConfigurationException {
this.targetConfigurations = ImmutableList.copyOf(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) {
String cacheKey = config.checksum();
if (cacheKeyConflictDetector.containsKey(cacheKey)) {
throw new InvalidConfigurationException("Conflicting configurations: " + config + " & "
+ cacheKeyConflictDetector.get(cacheKey));
}
cacheKeyConflictDetector.put(cacheKey, config);
}
}
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();
}
}
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