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// Copyright 2015 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.rules.proto;
import static com.google.devtools.build.lib.analysis.configuredtargets.RuleConfiguredTarget.Mode.TARGET;
import static com.google.devtools.build.lib.collect.nestedset.Order.STABLE_ORDER;
import com.google.common.base.Predicates;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.actions.MutableActionGraph.ActionConflictException;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.RuleConfiguredTargetBuilder;
import com.google.devtools.build.lib.analysis.RuleConfiguredTargetFactory;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.analysis.Runfiles;
import com.google.devtools.build.lib.analysis.RunfilesProvider;
import com.google.devtools.build.lib.analysis.TransitiveInfoCollection;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
/** An implementation for the "proto_library" rule. */
public class BazelProtoLibrary implements RuleConfiguredTargetFactory {
@Override
public ConfiguredTarget create(RuleContext ruleContext)
throws InterruptedException, RuleErrorException, ActionConflictException {
ImmutableList<Artifact> protoSources =
ruleContext.getPrerequisiteArtifacts("srcs", TARGET).list();
NestedSet<Artifact> checkDepsProtoSources =
ProtoCommon.getCheckDepsProtoSources(ruleContext, protoSources);
ProtoCommon.checkSourceFilesAreInSamePackage(ruleContext);
NestedSet<Artifact> transitiveImports =
ProtoCommon.collectTransitiveImports(ruleContext, protoSources);
NestedSet<Artifact> protosInDirectDeps = ProtoCommon.computeProtosInDirectDeps(ruleContext);
String protoSourceRoot = ProtoCommon.getProtoSourceRoot(ruleContext);
NestedSet<String> directProtoSourceRoots =
ProtoCommon.getProtoSourceRootsOfDirectDependencies(ruleContext, protoSourceRoot);
NestedSet<String> protoPathFlags =
ProtoCommon.collectTransitiveProtoPathFlags(ruleContext, protoSourceRoot);
final SupportData supportData =
SupportData.create(
/* nonWeakDepsPredicate= */ Predicates.<TransitiveInfoCollection>alwaysTrue(),
protoSources,
protosInDirectDeps,
transitiveImports,
protoPathFlags,
protoSourceRoot,
directProtoSourceRoots,
!protoSources.isEmpty());
Artifact descriptorSetOutput =
ruleContext.getGenfilesArtifact(
ruleContext.getLabel().getName() + "-descriptor-set.proto.bin");
NestedSet<Artifact> dependenciesDescriptorSets =
ProtoCommon.collectDependenciesDescriptorSets(ruleContext);
NestedSet<Artifact> transitiveDescriptorSetOutput =
NestedSetBuilder.fromNestedSet(dependenciesDescriptorSets).add(descriptorSetOutput).build();
ProtoCompileActionBuilder.writeDescriptorSet(
ruleContext,
descriptorSetOutput.getExecPathString(),
protoSources,
transitiveImports,
protosInDirectDeps,
descriptorSetOutput,
/* allowServices= */ true,
dependenciesDescriptorSets,
protoPathFlags,
directProtoSourceRoots);
Runfiles dataRunfiles =
ProtoCommon.createDataRunfilesProvider(transitiveImports, ruleContext)
.addArtifact(descriptorSetOutput)
.build();
// TODO(bazel-team): this second constructor argument is superfluous and should be removed.
ProtoSourcesProvider sourcesProvider =
ProtoSourcesProvider.create(
transitiveImports,
transitiveImports,
protoSources,
checkDepsProtoSources,
descriptorSetOutput,
transitiveDescriptorSetOutput,
protoPathFlags,
protoSourceRoot);
return new RuleConfiguredTargetBuilder(ruleContext)
.setFilesToBuild(NestedSetBuilder.create(STABLE_ORDER, descriptorSetOutput))
.addProvider(RunfilesProvider.withData(Runfiles.EMPTY, dataRunfiles))
.addProvider(ProtoSourcesProvider.class, sourcesProvider)
.addProvider(ProtoSupportDataProvider.class, new ProtoSupportDataProvider(supportData))
.addSkylarkTransitiveInfo(ProtoSourcesProvider.SKYLARK_NAME, sourcesProvider)
.build();
}
}
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