| // 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(); |
| } |
| } |