| // 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.rules.cpp; |
| |
| import static com.google.devtools.build.lib.packages.Attribute.attr; |
| import static com.google.devtools.build.lib.packages.BuildType.LABEL; |
| import static com.google.devtools.build.lib.packages.BuildType.NODEP_LABEL; |
| |
| import com.google.common.collect.ImmutableMap; |
| import com.google.devtools.build.lib.actions.MutableActionGraph.ActionConflictException; |
| import com.google.devtools.build.lib.analysis.BaseRuleClasses; |
| import com.google.devtools.build.lib.analysis.ConfiguredTarget; |
| import com.google.devtools.build.lib.analysis.PlatformConfiguration; |
| import com.google.devtools.build.lib.analysis.RuleConfiguredTargetBuilder; |
| import com.google.devtools.build.lib.analysis.RuleConfiguredTargetFactory; |
| import com.google.devtools.build.lib.analysis.RuleContext; |
| import com.google.devtools.build.lib.analysis.RuleDefinition; |
| import com.google.devtools.build.lib.analysis.RuleDefinitionEnvironment; |
| import com.google.devtools.build.lib.analysis.Runfiles; |
| import com.google.devtools.build.lib.analysis.RunfilesProvider; |
| import com.google.devtools.build.lib.analysis.TemplateVariableInfo; |
| import com.google.devtools.build.lib.analysis.config.ToolchainTypeRequirement; |
| import com.google.devtools.build.lib.analysis.platform.ToolchainInfo; |
| import com.google.devtools.build.lib.packages.RuleClass; |
| import com.google.devtools.build.lib.packages.RuleClass.ToolchainTransitionMode; |
| |
| /** Implementation of the {@code cc_toolchain_alias} rule. */ |
| public class CcToolchainAliasRule implements RuleDefinition { |
| @Override |
| public RuleClass build(RuleClass.Builder builder, RuleDefinitionEnvironment env) { |
| return builder |
| .requiresConfigurationFragments(CppConfiguration.class) |
| .removeAttribute("licenses") |
| .removeAttribute("distribs") |
| .add( |
| attr(CcToolchain.CC_TOOLCHAIN_DEFAULT_ATTRIBUTE_NAME, LABEL) |
| .mandatoryProviders(CcToolchainProvider.PROVIDER.id()) |
| .value(CppRuleClasses.ccToolchainAttribute(env))) |
| .add( |
| attr(CcToolchain.CC_TOOLCHAIN_TYPE_ATTRIBUTE_NAME, NODEP_LABEL) |
| .value(CppRuleClasses.ccToolchainTypeAttribute(env))) |
| .requiresConfigurationFragments(PlatformConfiguration.class) |
| // TODO(https://github.com/bazelbuild/bazel/issues/14727): Evaluate whether this can be |
| // optional. |
| .addToolchainTypes( |
| ToolchainTypeRequirement.builder(CppRuleClasses.ccToolchainTypeAttribute(env)) |
| .mandatory(true) |
| .build()) |
| .useToolchainTransition(ToolchainTransitionMode.ENABLED) |
| .build(); |
| } |
| |
| @Override |
| public Metadata getMetadata() { |
| return Metadata.builder() |
| .name("cc_toolchain_alias") |
| .ancestors(BaseRuleClasses.NativeBuildRule.class) |
| .factoryClass(CcToolchainAlias.class) |
| .build(); |
| } |
| |
| /** Implementation of cc_toolchain_alias. */ |
| public static class CcToolchainAlias implements RuleConfiguredTargetFactory { |
| @Override |
| public ConfiguredTarget create(RuleContext ruleContext) |
| throws InterruptedException, RuleErrorException, ActionConflictException { |
| |
| CcToolchainProvider ccToolchainProvider = |
| CppHelper.getToolchainUsingDefaultCcToolchainAttribute(ruleContext); |
| |
| TemplateVariableInfo templateVariableInfo = |
| CcToolchain.createMakeVariableProvider( |
| ccToolchainProvider, ruleContext.getRule().getLocation()); |
| |
| ToolchainInfo toolchain = |
| new ToolchainInfo( |
| ImmutableMap.<String, Object>builder() |
| .put("cc", ccToolchainProvider) |
| // Add a clear signal that this is a CcToolchainProvider, since just "cc" is |
| // generic enough to possibly be re-used. |
| .put("cc_provider_in_toolchain", true) |
| .build()); |
| |
| return new RuleConfiguredTargetBuilder(ruleContext) |
| .addProvider(RunfilesProvider.simple(Runfiles.EMPTY)) |
| .addNativeDeclaredProvider(ccToolchainProvider) |
| .addNativeDeclaredProvider(toolchain) |
| .addNativeDeclaredProvider(templateVariableInfo) |
| .setFilesToBuild(ccToolchainProvider.getAllFilesIncludingLibc()) |
| .build(); |
| } |
| } |
| } |