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Make PlatformMappingApplier its own class and rename it.
Work towards platform-based flags: #19409. PiperOrigin-RevId: 570779049 Change-Id: I142c44db575bd3f4b77d369285a9e97f57227271
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.../java/com/google/devtools/build/lib/analysis/producers/BuildConfigurationKeyProducer.java
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| // Copyright 2023 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.producers; | ||
|
|
||
| import com.google.common.collect.ImmutableListMultimap; | ||
| import com.google.common.collect.ImmutableMap; | ||
| import com.google.common.collect.Multimaps; | ||
| import com.google.devtools.build.lib.analysis.PlatformOptions; | ||
| import com.google.devtools.build.lib.analysis.config.BuildOptions; | ||
| import com.google.devtools.build.lib.skyframe.config.BuildConfigurationKey; | ||
| import com.google.devtools.build.lib.skyframe.config.PlatformMappingValue; | ||
| import com.google.devtools.build.lib.vfs.PathFragment; | ||
| import com.google.devtools.build.skyframe.state.StateMachine; | ||
| import com.google.devtools.common.options.OptionsParsingException; | ||
| import java.util.Collection; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
|
|
||
| /** | ||
| * Creates the needed {@link BuildConfigurationKey} instances for the given options. | ||
| * | ||
| * <p>This includes merging in platform mappings. | ||
| * | ||
| * <p>The output preserves the iteration order of the input. | ||
| */ | ||
| class BuildConfigurationKeyProducer implements StateMachine { | ||
| interface ResultSink { | ||
|
|
||
| void acceptTransitionError(OptionsParsingException e); | ||
|
|
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| void acceptTransitionedConfigurations( | ||
| ImmutableMap<String, BuildConfigurationKey> transitionedOptions); | ||
| } | ||
|
|
||
| // -------------------- Input -------------------- | ||
| private final ResultSink sink; | ||
| private final StateMachine runAfter; | ||
| private final Map<String, BuildOptions> options; | ||
|
|
||
| // -------------------- Internal State -------------------- | ||
| private final Map<String, PlatformMappingValue> platformMappingValues = new HashMap<>(); | ||
|
|
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| BuildConfigurationKeyProducer( | ||
| ResultSink sink, StateMachine runAfter, Map<String, BuildOptions> options) { | ||
| this.sink = sink; | ||
| this.runAfter = runAfter; | ||
| this.options = options; | ||
| } | ||
|
|
||
| @Override | ||
| public StateMachine step(Tasks tasks) { | ||
| // Deduplicates the platform mapping paths and collates the transition keys. | ||
| ImmutableListMultimap<Optional<PathFragment>, String> index = | ||
| Multimaps.index( | ||
| options.keySet(), transitionKey -> getPlatformMappingsPath(options.get(transitionKey))); | ||
| for (Map.Entry<Optional<PathFragment>, Collection<String>> entry : index.asMap().entrySet()) { | ||
| Collection<String> transitionKeys = entry.getValue(); | ||
| tasks.lookUp( | ||
| PlatformMappingValue.Key.create(entry.getKey().orElse(null)), | ||
| rawValue -> { | ||
| var value = (PlatformMappingValue) rawValue; | ||
| // Maps the value from all transition keys with the same platform mappings path. | ||
| for (String key : transitionKeys) { | ||
| platformMappingValues.put(key, value); | ||
| } | ||
| }); | ||
| } | ||
| return this::applyMappings; | ||
| } | ||
|
|
||
| private StateMachine applyMappings(Tasks tasks) { | ||
| var result = | ||
| ImmutableMap.<String, BuildConfigurationKey>builderWithExpectedSize(options.size()); | ||
| for (Map.Entry<String, BuildOptions> entry : options.entrySet()) { | ||
| String transitionKey = entry.getKey(); | ||
| BuildConfigurationKey newConfigurationKey; | ||
| try { | ||
| newConfigurationKey = | ||
| BuildConfigurationKey.withPlatformMapping( | ||
| platformMappingValues.get(transitionKey), entry.getValue()); | ||
| } catch (OptionsParsingException e) { | ||
| sink.acceptTransitionError(e); | ||
| return runAfter; | ||
| } | ||
| result.put(transitionKey, newConfigurationKey); | ||
| } | ||
| sink.acceptTransitionedConfigurations(result.buildOrThrow()); | ||
| return runAfter; | ||
| } | ||
|
|
||
| private static Optional<PathFragment> getPlatformMappingsPath(BuildOptions fromOptions) { | ||
| return fromOptions.hasNoConfig() | ||
| ? Optional.empty() | ||
| : Optional.ofNullable(fromOptions.get(PlatformOptions.class).platformMappings); | ||
| } | ||
| } |
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