| // Copyright 2017 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; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Iterables; |
| import com.google.devtools.build.lib.analysis.config.BuildConfiguration; |
| import com.google.devtools.build.lib.analysis.config.BuildOptions; |
| import com.google.devtools.build.lib.analysis.config.ConfigurationFragmentFactory; |
| import com.google.devtools.build.lib.analysis.config.FragmentOptions; |
| import com.google.devtools.build.lib.analysis.config.InvalidConfigurationException; |
| import com.google.devtools.build.lib.cmdline.Label; |
| |
| /** A loader that creates {@link PlatformConfiguration} instances based on command-line options. */ |
| public class PlatformConfigurationLoader implements ConfigurationFragmentFactory { |
| @Override |
| public ImmutableSet<Class<? extends FragmentOptions>> requiredOptions() { |
| return ImmutableSet.<Class<? extends FragmentOptions>>of(PlatformOptions.class); |
| } |
| |
| @Override |
| public PlatformConfiguration create(BuildOptions buildOptions) |
| throws InvalidConfigurationException { |
| PlatformOptions platformOptions = buildOptions.get(PlatformOptions.class); |
| |
| // Handle default values for the host and target platform. |
| // TODO(https://github.com/bazelbuild/bazel/issues/6849): After migration, set the defaults |
| // directly. |
| Label hostPlatform; |
| if (platformOptions.hostPlatform != null) { |
| hostPlatform = platformOptions.hostPlatform; |
| } else if (platformOptions.autoConfigureHostPlatform) { |
| // Use the auto-configured host platform. |
| hostPlatform = PlatformOptions.DEFAULT_HOST_PLATFORM; |
| } else { |
| // Use the legacy host platform. |
| hostPlatform = PlatformOptions.LEGACY_DEFAULT_HOST_PLATFORM; |
| } |
| |
| Label targetPlatform; |
| if (!platformOptions.platforms.isEmpty()) { |
| targetPlatform = Iterables.getFirst(platformOptions.platforms, null); |
| } else if (platformOptions.autoConfigureHostPlatform) { |
| // Default to the host platform, whatever it is. |
| targetPlatform = hostPlatform; |
| } else { |
| // Use the legacy target platform |
| targetPlatform = PlatformOptions.LEGACY_DEFAULT_TARGET_PLATFORM; |
| } |
| |
| return new PlatformConfiguration( |
| hostPlatform, |
| ImmutableList.copyOf(platformOptions.extraExecutionPlatforms), |
| targetPlatform, |
| ImmutableList.copyOf(platformOptions.extraToolchains), |
| ImmutableList.copyOf(platformOptions.enabledToolchainTypes)); |
| } |
| |
| @Override |
| public Class<? extends BuildConfiguration.Fragment> creates() { |
| return PlatformConfiguration.class; |
| } |
| } |