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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.analysis.constraints;
import com.google.common.collect.ImmutableMap;
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.RunfilesProvider;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.packages.EnvironmentGroup;
import com.google.devtools.build.lib.packages.RuleClass.ConfiguredTargetFactory.RuleErrorException;
/**
* Implementation for the environment rule.
*/
public class Environment implements RuleConfiguredTargetFactory {
@Override
public ConfiguredTarget create(RuleContext ruleContext)
throws InterruptedException, RuleErrorException, ActionConflictException {
// The main analysis work to do here is to simply fill in SupportedEnvironmentsProvider to
// pass the environment itself to depending rules.
Label label = ruleContext.getLabel();
EnvironmentGroup group;
try {
group = ConstraintSemantics.getEnvironmentGroup(ruleContext.getRule());
} catch (ConstraintSemantics.EnvironmentLookupException e) {
ruleContext.ruleError(e.getMessage());
return null;
}
EnvironmentCollection env =
new EnvironmentCollection.Builder().put(group.getEnvironmentLabels(), label).build();
return new RuleConfiguredTargetBuilder(ruleContext)
.addProvider(SupportedEnvironmentsProvider.class,
new SupportedEnvironments(env, env, ImmutableMap.of()))
.addProvider(RunfilesProvider.class, RunfilesProvider.EMPTY)
.add(FileProvider.class, FileProvider.EMPTY)
.add(FilesToRunProvider.class, FilesToRunProvider.EMPTY)
.build();
}
}
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