| /* |
| * Copyright 2014-present Facebook, Inc. |
| * |
| * 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.facebook.buck.rules; |
| |
| import com.facebook.buck.rules.RuleKey.Builder; |
| import com.facebook.buck.step.Step; |
| import com.google.common.collect.ImmutableCollection; |
| import com.google.common.collect.ImmutableList; |
| |
| import java.nio.file.Path; |
| |
| /** |
| * {@link BuildRule} that wraps a file generated by another rule so that there can be a |
| * {@link BuildTargetSourcePath} that corresponds to that file. This is frequently used with |
| * rules/flavors that are generated via graph enhancement. |
| */ |
| public class OutputOnlyBuildRule extends AbstractBuildRule { |
| |
| public static final BuildRuleType TYPE = ImmutableBuildRuleType.of("output_only_build_rule"); |
| |
| private final Path pathToOutputFile; |
| |
| public OutputOnlyBuildRule( |
| BuildRuleParams buildRuleParams, |
| SourcePathResolver resolver, |
| Path pathToOutputFile) { |
| super(buildRuleParams, resolver); |
| this.pathToOutputFile = pathToOutputFile; |
| } |
| |
| @Override |
| public ImmutableList<Step> getBuildSteps( |
| BuildContext context, |
| BuildableContext buildableContext) { |
| buildableContext.recordArtifact(pathToOutputFile); |
| |
| return ImmutableList.of(); |
| } |
| |
| @Override |
| public Path getPathToOutputFile() { |
| return pathToOutputFile; |
| } |
| |
| @Override |
| protected ImmutableCollection<Path> getInputsToCompareToOutput() { |
| return ImmutableList.of(); |
| } |
| |
| @Override |
| protected Builder appendDetailsToRuleKey(Builder builder) { |
| // Note that the path itself is part of the rule key, but not the contents of the file. |
| return builder.setReflectively("output", pathToOutputFile.toString()); |
| } |
| |
| } |