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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;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.actions.ActionOwner;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.actions.MiddlemanFactory;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.collect.nestedset.Order;
import java.util.List;
/**
* A helper class for compilation helpers.
*/
public final class CompilationHelper {
/**
* Returns a middleman for all files to build for the given configured target.
* If multiple calls are made, then it returns the same artifact for
* configurations with the same internal directory.
*
* <p>The resulting middleman only aggregates the inputs and must be expanded
* before an action using it can be sent to a distributed execution-system.
*/
public static NestedSet<Artifact> getAggregatingMiddleman(
RuleContext ruleContext, String purpose, NestedSet<Artifact> filesToBuild) {
return NestedSetBuilder.wrap(Order.STABLE_ORDER, getMiddlemanInternal(
ruleContext.getAnalysisEnvironment(), ruleContext, ruleContext.getActionOwner(), purpose,
filesToBuild));
}
/**
* Internal implementation for getAggregatingMiddleman / getAggregatingMiddlemanWithSolibSymlinks.
*/
private static List<Artifact> getMiddlemanInternal(AnalysisEnvironment env,
RuleContext ruleContext, ActionOwner actionOwner, String purpose,
NestedSet<Artifact> filesToBuild) {
if (filesToBuild == null) {
return ImmutableList.of();
}
MiddlemanFactory factory = env.getMiddlemanFactory();
return ImmutableList.of(factory.createMiddlemanAllowMultiple(
env, actionOwner, ruleContext.getPackageDirectory(), purpose, filesToBuild,
ruleContext.getConfiguration().getMiddlemanDirectory()));
}
// TODO(bazel-team): remove this duplicated code after the ConfiguredTarget migration
/**
* Returns a middleman for all files to build for the given configured target.
* If multiple calls are made, then it returns the same artifact for
* configurations with the same internal directory.
*
* <p>The resulting middleman only aggregates the inputs and must be expanded
* before an action using it can be sent to a distributed execution-system.
*/
public static NestedSet<Artifact> getAggregatingMiddleman(
RuleContext ruleContext, String purpose, TransitiveInfoCollection dep) {
return NestedSetBuilder.wrap(Order.STABLE_ORDER, getMiddlemanInternal(
ruleContext.getAnalysisEnvironment(), ruleContext, ruleContext.getActionOwner(), purpose,
dep));
}
/**
* Internal implementation for getAggregatingMiddleman / getAggregatingMiddlemanWithSolibSymlinks.
*/
private static List<Artifact> getMiddlemanInternal(AnalysisEnvironment env,
RuleContext ruleContext, ActionOwner actionOwner, String purpose,
TransitiveInfoCollection dep) {
if (dep == null) {
return ImmutableList.of();
}
MiddlemanFactory factory = env.getMiddlemanFactory();
Iterable<Artifact> artifacts = dep.getProvider(FileProvider.class).getFilesToBuild();
return ImmutableList.of(
factory.createMiddlemanAllowMultiple(env, actionOwner, ruleContext.getPackageDirectory(),
purpose, artifacts, ruleContext.getConfiguration().getMiddlemanDirectory()));
}
}
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