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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;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.RuleConfiguredTargetBuilder;
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.config.BuildConfiguration;
import com.google.devtools.build.lib.cmdline.Label;
import java.util.TreeMap;
/**
* Abstract base class for {@code toolchain_type}.
*/
public class ToolchainType implements RuleConfiguredTargetFactory {
private final ImmutableMap<Label, Class<? extends BuildConfiguration.Fragment>> fragmentMap;
private final ImmutableMap<Label, ImmutableMap<String, String>> hardcodedVariableMap;
protected ToolchainType(
ImmutableMap<Label, Class<? extends BuildConfiguration.Fragment>> fragmentMap,
ImmutableMap<Label, ImmutableMap<String, String>> hardcodedVariableMap) {
this.fragmentMap = fragmentMap;
this.hardcodedVariableMap = hardcodedVariableMap;
}
@Override
public ConfiguredTarget create(RuleContext ruleContext)
throws InterruptedException, RuleErrorException {
// This cannot be an ImmutableMap.Builder because that asserts when a key is duplicated
TreeMap<String, String> makeVariables = new TreeMap<>();
Class<? extends BuildConfiguration.Fragment> fragmentClass =
fragmentMap.get(ruleContext.getLabel());
if (fragmentClass != null) {
BuildConfiguration.Fragment fragment = ruleContext.getFragment(fragmentClass);
ImmutableMap.Builder<String, String> fragmentBuilder = ImmutableMap.builder();
fragment.addGlobalMakeVariables(fragmentBuilder);
makeVariables.putAll(fragmentBuilder.build());
}
ImmutableMap<String, String> hardcodedVariables =
hardcodedVariableMap.get(ruleContext.getLabel());
if (hardcodedVariables != null) {
makeVariables.putAll(hardcodedVariables);
}
// This will eventually go to Skyframe using getAnalysisEnvironment.getSkyframeEnv() to figure
// out the lookup rule -> toolchain rule mapping. For now, it only provides Make variables that
// come from BuildConfiguration so no need to ask Skyframe.
return new RuleConfiguredTargetBuilder(ruleContext)
.addProvider(new ToolchainProvider(ImmutableMap.copyOf(makeVariables)))
.addProvider(RunfilesProvider.simple(Runfiles.EMPTY))
.build();
}
}
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