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// Copyright 2016 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.HOST;
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.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.FileProvider;
import com.google.devtools.build.lib.analysis.FilesToRunProvider;
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.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.syntax.Type;
/** Implements {code proto_lang_toolchain}. */
public class ProtoLangToolchain implements RuleConfiguredTargetFactory {
@Override
public ConfiguredTarget create(RuleContext ruleContext)
throws InterruptedException, RuleErrorException, ActionConflictException {
NestedSetBuilder<Artifact> blacklistedProtos = NestedSetBuilder.stableOrder();
for (FileProvider protos :
ruleContext.getPrerequisites("blacklisted_protos", TARGET, FileProvider.class)) {
blacklistedProtos.addTransitive(protos.getFilesToBuild());
}
return new RuleConfiguredTargetBuilder(ruleContext)
.addProvider(
ProtoLangToolchainProvider.create(
ruleContext.attributes().get("command_line", Type.STRING),
ruleContext.getPrerequisite("plugin", HOST, FilesToRunProvider.class),
ruleContext.getPrerequisite("runtime", TARGET),
blacklistedProtos.build()))
.setFilesToBuild(NestedSetBuilder.<Artifact>emptySet(STABLE_ORDER))
.addProvider(RunfilesProvider.simple(Runfiles.EMPTY))
.build();
}
}
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