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Roll forward config_setting visibility enforcement behind a flag.
This was rolled back in bazelbuild@36d228b because of depot breakages. This version adds incompatible flags to safely introduce enforcement. See bazelbuild#12932 and bazelbuild#12933 for flag settings. *** Original change description *** Roll back bazelbuild#12877. *** Fixes bazelbuild#12669. RELNOTES: enforce config_setting visibility. See bazelbuild#12932 for details. PiperOrigin-RevId: 354930807
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src/main/java/com/google/devtools/build/lib/analysis/config/ConfigConditions.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| // Copyright 2021 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.auto.value.AutoValue; | ||
| import com.google.common.collect.ImmutableMap; | ||
| import com.google.devtools.build.lib.analysis.ConfiguredTarget; | ||
| import com.google.devtools.build.lib.analysis.platform.ConstraintValueInfo; | ||
| import com.google.devtools.build.lib.analysis.platform.PlatformInfo; | ||
| import com.google.devtools.build.lib.cmdline.Label; | ||
| import com.google.devtools.build.lib.skyframe.ConfiguredTargetAndData; | ||
|
|
||
| /** | ||
| * Utility class for temporarily tracking {@code select()} keys' {@link ConfigMatchingProvider}s and | ||
| * {@link ConfiguredTarget}s. | ||
| * | ||
| * <p>This is a utility class because its only purpose is to maintain {@link ConfiguredTarget} long | ||
| * enough for {@link RuleContext.Builder} to do prerequisite validation on it (for example, | ||
| * visibility checks). | ||
| * | ||
| * <p>Once {@link RuleContext} is instantiated, it should only have access to {@link | ||
| * ConfigMatchingProvider}, on the principle that providers are the correct interfaces for storing | ||
| * and sharing target metadata. {@link ConfiguredTarget} isn't meant to persist that long. | ||
| */ | ||
| @AutoValue | ||
| public abstract class ConfigConditions { | ||
| public abstract ImmutableMap<Label, ConfiguredTargetAndData> asConfiguredTargets(); | ||
|
|
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| public abstract ImmutableMap<Label, ConfigMatchingProvider> asProviders(); | ||
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|
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| public static ConfigConditions create( | ||
| ImmutableMap<Label, ConfiguredTargetAndData> asConfiguredTargets, | ||
| ImmutableMap<Label, ConfigMatchingProvider> asProviders) { | ||
| return new AutoValue_ConfigConditions(asConfiguredTargets, asProviders); | ||
| } | ||
|
|
||
| public static final ConfigConditions EMPTY = | ||
| ConfigConditions.create(ImmutableMap.of(), ImmutableMap.of()); | ||
|
|
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| /** Exception for when a {@code select()} has an invalid key (for example, wrong target type). */ | ||
| public static class InvalidConditionException extends Exception {} | ||
|
|
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| /** | ||
| * Returns a {@link ConfigMatchingProvider} from the given configured target if appropriate, else | ||
| * triggers a {@link InvalidConditionException}. | ||
| * | ||
| * <p>This is the canonical place to extract {@link ConfigMatchingProvider}s from configured | ||
| * targets. It's not as simple as {@link ConfiguredTarget#getProvider}. | ||
| */ | ||
| public static ConfigMatchingProvider fromConfiguredTarget( | ||
| ConfiguredTargetAndData selectKey, PlatformInfo targetPlatform) | ||
| throws InvalidConditionException { | ||
| ConfiguredTarget selectable = selectKey.getConfiguredTarget(); | ||
| // The below handles config_setting (which natively provides ConfigMatchingProvider) and | ||
| // constraint_value (which needs a custom-built ConfigMatchingProvider). | ||
| ConfigMatchingProvider matchingProvider = selectable.getProvider(ConfigMatchingProvider.class); | ||
| if (matchingProvider != null) { | ||
| return matchingProvider; | ||
| } | ||
| ConstraintValueInfo constraintValueInfo = selectable.get(ConstraintValueInfo.PROVIDER); | ||
| if (constraintValueInfo != null && targetPlatform != null) { | ||
| // If platformInfo == null, that means the owning target doesn't invoke toolchain | ||
| // resolution, in which case depending on a constraint_value is nonsensical. | ||
| return constraintValueInfo.configMatchingProvider(targetPlatform); | ||
| } | ||
|
|
||
| // Not a valid provider for configuration conditions. | ||
| throw new InvalidConditionException(); | ||
| } | ||
| } |
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