| // Copyright 2019 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.config; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.ImmutableList; |
| import com.google.devtools.build.lib.analysis.PlatformOptions; |
| import com.google.devtools.build.lib.analysis.config.transitions.PatchTransition; |
| import com.google.devtools.build.lib.analysis.config.transitions.TransitionFactory; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.packages.AttributeTransitionData; |
| import javax.annotation.Nullable; |
| |
| /** |
| * {@link TransitionFactory} implementation which creates a {@link PatchTransition} which will |
| * transition to a configuration suitable for building dependencies for the execution platform of |
| * the depending target. |
| */ |
| public class ExecutionTransitionFactory implements TransitionFactory<AttributeTransitionData> { |
| |
| @Override |
| public PatchTransition create(AttributeTransitionData data) { |
| return new ExecutionTransition(data.executionPlatform()); |
| } |
| |
| @Override |
| public boolean isHost() { |
| return false; |
| } |
| |
| private static class ExecutionTransition implements PatchTransition { |
| @Nullable private final Label executionPlatform; |
| |
| public ExecutionTransition(@Nullable Label executionPlatform) { |
| this.executionPlatform = executionPlatform; |
| } |
| |
| @Override |
| public String getName() { |
| return "exec"; |
| } |
| |
| @Override |
| public boolean isHostTransition() { |
| return false; |
| } |
| |
| @Override |
| public BuildOptions patch(BuildOptions options) { |
| if (executionPlatform == null) { |
| // No execution platform is known, so don't change anything. |
| return options; |
| } |
| |
| // Start by converting to host options. |
| BuildOptions execConfiguration = options.createHostOptions(); |
| |
| // Then unset isHost, if CoreOptions is available. |
| CoreOptions coreOptions = |
| Preconditions.checkNotNull(execConfiguration.get(CoreOptions.class)); |
| coreOptions.isHost = false; |
| coreOptions.outputDirectoryName = null; |
| coreOptions.platformSuffix = |
| String.format("-exec-%X", executionPlatform.getCanonicalForm().hashCode()); |
| |
| // Then set the target to the saved execution platform if there is one. |
| if (execConfiguration.get(PlatformOptions.class) != null) { |
| execConfiguration.get(PlatformOptions.class).platforms = |
| ImmutableList.of(executionPlatform); |
| } |
| |
| return execConfiguration; |
| } |
| } |
| } |