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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 static com.google.devtools.build.lib.packages.Attribute.ConfigurationTransition.HOST;
import static com.google.devtools.build.lib.packages.Attribute.attr;
import static com.google.devtools.build.lib.packages.BuildType.LABEL;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.RuleConfiguredTarget.Mode;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.analysis.actions.CustomCommandLine;
import com.google.devtools.build.lib.analysis.actions.SpawnAction;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.packages.AspectDefinition;
import com.google.devtools.build.lib.vfs.PathFragment;
/**
* An aspect that transpiles .proto dependencies using the J2ObjC proto plugin,
* //tools/objc:compile_protos and //tools/objc:proto_support. N.B.: These two tools
* have not yet been released into open-source.
*/
public class BazelJ2ObjcProtoAspect extends AbstractJ2ObjcProtoAspect {
@Override
protected AspectDefinition.Builder addAdditionalAttributes(AspectDefinition.Builder builder) {
return builder
.add(attr("$protoc_darwin", LABEL)
.cfg(HOST)
.exec()
.value(parseLabel("//tools/objc:compile_protos")))
.add(attr("$protoc_support_darwin", LABEL)
.cfg(HOST)
.exec()
.value(parseLabel("//tools/objc:proto_support")))
.add(attr("$j2objc_plugin", LABEL)
.cfg(HOST)
.exec()
.value(parseLabel(
"//third_party/java/j2objc:proto_plugin")));
}
@Override
protected boolean checkShouldCreateAspect(RuleContext ruleContext) {
return true;
}
protected void createActions(ConfiguredTarget base, RuleContext ruleContext,
Iterable<Artifact> protoSources, NestedSet<Artifact> transitiveProtoSources,
Iterable<Artifact> headerMappingFiles, Iterable<Artifact> classMappingFiles,
J2ObjcSource j2ObjcSource) {
String genDir = ruleContext.getConfiguration().getGenfilesDirectory().getExecPathString();
Artifact compiler = ruleContext.getPrerequisiteArtifact(
"$protoc_darwin", Mode.HOST);
Artifact j2objcPlugin = ruleContext.getPrerequisiteArtifact("$j2objc_plugin", Mode.HOST);
ruleContext.registerAction(new SpawnAction.Builder()
.setMnemonic("TranslatingJ2ObjcProtos")
.addInput(compiler)
.addInput(j2objcPlugin)
.addInputs(ruleContext.getPrerequisiteArtifacts(
"$protoc_support_darwin", Mode.HOST).list())
.addInputs(protoSources)
.addTransitiveInputs(transitiveProtoSources)
.addOutputs(j2ObjcSource.getObjcSrcs())
.addOutputs(j2ObjcSource.getObjcHdrs())
.addOutputs(headerMappingFiles)
.addOutputs(classMappingFiles)
.setExecutable(new PathFragment("/usr/bin/python"))
.setCommandLine(new CustomCommandLine.Builder()
.add(compiler.getPath().toString())
.add("-w")
.add(compiler.getRoot().getPath().toString())
.add("--generate-j2objc")
.add("--generator-param=file_dir_mapping")
.add("--generator-param=generate_class_mappings")
.add("--j2objc-plugin=" + j2objcPlugin.getExecPathString())
.add("--output-dir=" + genDir)
.addExecPaths(protoSources)
.build())
.setExecutionInfo(ImmutableMap.of(ExecutionRequirements.REQUIRES_DARWIN, ""))
.build(ruleContext));
}
@Override
protected boolean checkShouldCreateSources(RuleContext ruleContext) {
return true;
}
}
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