| // Copyright 2016 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.rules.cpp; |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.devtools.build.lib.actions.Artifact; |
| import com.google.devtools.build.lib.analysis.RuleContext; |
| import com.google.devtools.build.lib.analysis.RuleErrorConsumer; |
| import com.google.devtools.build.lib.analysis.TransitiveInfoCollection; |
| import com.google.devtools.build.lib.analysis.config.BuildConfigurationValue; |
| import com.google.devtools.build.lib.packages.AspectDescriptor; |
| import com.google.devtools.build.lib.packages.StructImpl; |
| import com.google.devtools.build.lib.rules.cpp.CcCommon.Language; |
| import com.google.devtools.build.lib.rules.cpp.CcToolchainFeatures.FeatureConfiguration; |
| import com.google.devtools.build.lib.rules.cpp.CppConfiguration.HeadersCheckingMode; |
| |
| /** |
| * CppSemantics for objc builds. |
| */ |
| public class ObjcCppSemantics implements CppSemantics { |
| public static final ObjcCppSemantics INSTANCE = new ObjcCppSemantics(); |
| |
| private ObjcCppSemantics() {} |
| |
| @Override |
| public Language language() { |
| return Language.OBJC; |
| } |
| |
| @Override |
| public void finalizeCompileActionBuilder( |
| BuildConfigurationValue configuration, |
| FeatureConfiguration featureConfiguration, |
| CppCompileActionBuilder actionBuilder, |
| RuleErrorConsumer ruleErrorConsumer) { |
| Artifact sourceFile = actionBuilder.getSourceFile(); |
| CcToolchainProvider toolchain = actionBuilder.getToolchain(); |
| |
| // Two things have to be true to perform #include scanning: |
| // 1. The toolchain configuration has to generally enable it. |
| // This is the default unless the --noexperimental_objc_include_scanning flag was specified. |
| // 2. The file must not be a not-for-preprocessing assembler source file. |
| // Assembler without C preprocessing can use the '.include' pseudo-op which is not |
| // understood by the include scanner, so we'll disable scanning, and instead require |
| // the declared sources to state (possibly overapproximate) the dependencies. |
| // Assembler with preprocessing can also use '.include', but supporting both kinds |
| // of inclusion for that use-case is ridiculous. |
| boolean shouldScanIncludes = |
| configuration.getFragment(CppConfiguration.class).objcShouldScanIncludes() |
| && !sourceFile.isFileType(CppFileTypes.ASSEMBLER) |
| && !sourceFile.isFileType(CppFileTypes.CPP_MODULE); |
| if (shouldScanIncludes && actionBuilder.getGrepIncludes() == null) { |
| ruleErrorConsumer.ruleError( |
| "When include scanning is turned on, the rule must pass grep_includes"); |
| } |
| |
| actionBuilder.setShouldScanIncludes(shouldScanIncludes); |
| |
| // If include scanning is enabled, we can use the filegroup without header files - they are |
| // found by include scanning. We still need the system framework headers since they are not |
| // being scanned right now, but those are placed in the "compile" file group. |
| actionBuilder.addTransitiveMandatoryInputs( |
| actionBuilder.getShouldScanIncludes() |
| ? actionBuilder.getToolchain().getCompilerFilesWithoutIncludes() |
| : configuration.getFragment(CppConfiguration.class).useSpecificToolFiles() |
| && !actionBuilder.getSourceFile().isTreeArtifact() |
| ? (actionBuilder.getActionName().equals(CppActionNames.ASSEMBLE) |
| ? toolchain.getAsFiles() |
| : toolchain.getCompilerFiles()) |
| : toolchain.getAllFiles()); |
| } |
| |
| @Override |
| public HeadersCheckingMode determineHeadersCheckingMode(RuleContext ruleContext) { |
| return HeadersCheckingMode.STRICT; |
| } |
| |
| @Override |
| public HeadersCheckingMode determineStarlarkHeadersCheckingMode( |
| RuleContext context, CppConfiguration cppConfig, CcToolchainProvider toolchain) { |
| if (cppConfig.strictHeaderCheckingFromStarlark()) { |
| return HeadersCheckingMode.STRICT; |
| } |
| return HeadersCheckingMode.LOOSE; |
| } |
| |
| @Override |
| public boolean allowIncludeScanning() { |
| return true; |
| } |
| |
| @Override |
| public boolean needsDotdInputPruning(BuildConfigurationValue configuration) { |
| return configuration.getFragment(CppConfiguration.class).objcShouldGenerateDotdFiles(); |
| } |
| |
| @Override |
| public void validateAttributes(RuleContext ruleContext) { |
| } |
| |
| @Override |
| public boolean needsIncludeValidation() { |
| return true; |
| } |
| |
| /** cc_shared_library is not supported with Objective-C */ |
| @Override |
| public StructImpl getCcSharedLibraryInfo(TransitiveInfoCollection dep) { |
| return null; |
| } |
| |
| @Override |
| public void validateLayeringCheckFeatures( |
| RuleContext ruleContext, |
| AspectDescriptor aspectDescriptor, |
| CcToolchainProvider ccToolchain, |
| ImmutableSet<String> unsupportedFeatures) {} |
| |
| @Override |
| public boolean createEmptyArchive() { |
| return false; |
| } |
| |
| @Override |
| public void checkCanUseImplementationDeps(RuleContext ruleContext) {} |
| } |