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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.rules.objc;
import com.google.common.collect.Iterables;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.RuleConfiguredTargetFactory;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.analysis.configuredtargets.RuleConfiguredTarget.Mode;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.rules.proto.ProtoSourcesProvider;
/**
* Implementation for the "objc_proto_library" rule.
*/
public class ObjcProtoLibrary implements RuleConfiguredTargetFactory {
@Override
public ConfiguredTarget create(final RuleContext ruleContext)
throws InterruptedException, RuleErrorException {
ProtoAttributes attributes = new ProtoAttributes(ruleContext);
attributes.validate();
if (attributes.requiresProtobuf()) {
return createProtobufTarget(ruleContext);
} else {
ruleContext.ruleWarning("The usage of objc_proto_library without the portable_proto_filters "
+ "attribute has been deprecated with a deadline to migrate set to June 30th. Please "
+ "refer to b/37274743 for more information.");
return createProtocolBuffers2Target(ruleContext);
}
}
private ConfiguredTarget createProtobufTarget(RuleContext ruleContext)
throws InterruptedException, RuleErrorException {
NestedSetBuilder<Artifact> filesToBuild = NestedSetBuilder.stableOrder();
Iterable<ProtoSourcesProvider> protoProviders =
ruleContext.getPrerequisites("deps", Mode.TARGET, ProtoSourcesProvider.class);
Iterable<ObjcProtoProvider> objcProtoProviders =
ruleContext.getPrerequisites("deps", Mode.TARGET, ObjcProtoProvider.class);
ProtobufSupport protoSupport =
new ProtobufSupport(
ruleContext,
ruleContext.getConfiguration(),
protoProviders,
objcProtoProviders,
getPortableProtoFilters(ruleContext, objcProtoProviders, protoProviders))
.registerGenerationActions()
.addFilesToBuild(filesToBuild);
return ObjcRuleClasses.ruleConfiguredTarget(ruleContext, filesToBuild.build())
.addNativeDeclaredProvider(protoSupport.getObjcProvider().get())
.build();
}
private static NestedSet<Artifact> getPortableProtoFilters(
RuleContext ruleContext,
Iterable<ObjcProtoProvider> objcProtoProviders,
Iterable<ProtoSourcesProvider> protoProviders) {
ProtoAttributes attributes = new ProtoAttributes(ruleContext);
NestedSetBuilder<Artifact> portableProtoFilters = NestedSetBuilder.stableOrder();
portableProtoFilters.addTransitive(
ProtobufSupport.getTransitivePortableProtoFilters(objcProtoProviders));
// If this target specifies filters, use those. If not, generate a filter only if there are
// direct proto_library targets, and generate a filter only for those files.
if (attributes.hasPortableProtoFilters()) {
portableProtoFilters.addAll(attributes.getPortableProtoFilters());
} else if (!Iterables.isEmpty(protoProviders)) {
Artifact generatedFilter = ProtobufSupport.getGeneratedPortableFilter(ruleContext,
ruleContext.getConfiguration());
ProtobufSupport.registerPortableFilterGenerationAction(
ruleContext,
generatedFilter,
protoProviders);
portableProtoFilters.add(generatedFilter);
}
return portableProtoFilters.build();
}
private ConfiguredTarget createProtocolBuffers2Target(RuleContext ruleContext)
throws InterruptedException, RuleErrorException {
NestedSetBuilder<Artifact> filesToBuild = NestedSetBuilder.stableOrder();
ProtocolBuffers2Support protoSupport =
new ProtocolBuffers2Support(ruleContext)
.registerGenerationActions()
.registerCompilationActions()
.addFilesToBuild(filesToBuild);
return ObjcRuleClasses.ruleConfiguredTarget(ruleContext, filesToBuild.build())
.addNativeDeclaredProvider(protoSupport.getObjcProvider())
.build();
}
}
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