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Currently guarded by --experimental_action_args. With this flag aspects can access precise command lines used by C++ actions by calling their .args() method. See 2b6a435 for more details. RELNOTES: None. PiperOrigin-RevId: 282540483
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105 changes: 105 additions & 0 deletions
105
src/main/java/com/google/devtools/build/lib/rules/cpp/FeatureConfigurationCommandLine.java
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| // Copyright 2019 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; | ||
|
|
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| import com.google.common.collect.ImmutableList; | ||
| import com.google.devtools.build.lib.actions.Artifact.ArtifactExpander; | ||
| import com.google.devtools.build.lib.actions.CommandLine; | ||
| import com.google.devtools.build.lib.actions.CommandLineExpansionException; | ||
| import com.google.devtools.build.lib.rules.cpp.CcToolchainFeatures.ExpansionException; | ||
| import com.google.devtools.build.lib.rules.cpp.CcToolchainFeatures.FeatureConfiguration; | ||
|
|
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| /** | ||
| * A representation of command line for C++ actions ({@link CppCompileAction}, {@link | ||
| * CppLinkAction}, {@link LtoBackendAction}...). | ||
| * | ||
| * <p>This class is an adapter from {@link FeatureConfiguration} and {@link CcToolchainVariables} to | ||
| * {@link CommandLine}. Using this we're able to pass C++ command lines to {@link | ||
| * com.google.devtools.build.lib.analysis.actions.SpawnAction} or to give access to C++ command | ||
| * lines to Starlark aspects. | ||
| * | ||
| * <p>See {@link CompileCommandLine#getArguments} for inline subclass of CommandLine that does all | ||
| * of this plus some more specifics for CppCompileAction. | ||
| */ | ||
| public class FeatureConfigurationCommandLine extends CommandLine { | ||
|
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| private final FeatureConfiguration featureConfiguration; | ||
| private final CcToolchainVariables buildVariables; | ||
| private final String actionName; | ||
| private final boolean usePic; | ||
|
|
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| /** | ||
| * Create a {@link CommandLine} instance from given {@link FeatureConfiguration} and {@link | ||
| * CcToolchainVariables}. | ||
| */ | ||
| public static FeatureConfigurationCommandLine from( | ||
| FeatureConfiguration featureConfiguration, | ||
| CcToolchainVariables ccToolchainVariables, | ||
| String actionName) { | ||
| return new FeatureConfigurationCommandLine( | ||
| featureConfiguration, ccToolchainVariables, actionName, /* usePic= */ false); | ||
| } | ||
|
|
||
| /** | ||
| * Do not use for new code. | ||
| * | ||
| * <p>TODO(hlopko): Refactor to remove the usePic field. | ||
| * | ||
| * @deprecated Only there for legacy/technical debt reasons for ThinLTO. | ||
| */ | ||
| @Deprecated | ||
| public static FeatureConfigurationCommandLine forLtoBackendAction( | ||
| FeatureConfiguration featureConfiguration, | ||
| CcToolchainVariables ccToolchainVariables, | ||
| boolean usePic) { | ||
| return new FeatureConfigurationCommandLine( | ||
| featureConfiguration, ccToolchainVariables, CppActionNames.LTO_BACKEND, usePic); | ||
| } | ||
|
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| private FeatureConfigurationCommandLine( | ||
| FeatureConfiguration featureConfiguration, | ||
| CcToolchainVariables ccToolchainVariables, | ||
| String actionName, | ||
| boolean usePic) { | ||
| this.featureConfiguration = featureConfiguration; | ||
| this.buildVariables = ccToolchainVariables; | ||
| this.actionName = actionName; | ||
| this.usePic = usePic; | ||
| } | ||
| @Override | ||
| public Iterable<String> arguments() throws CommandLineExpansionException { | ||
| return arguments(/* artifactExpander= */ null); | ||
| } | ||
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| @Override | ||
| public Iterable<String> arguments(ArtifactExpander artifactExpander) | ||
| throws CommandLineExpansionException { | ||
| ImmutableList.Builder<String> args = ImmutableList.builder(); | ||
| try { | ||
| args.addAll( | ||
| featureConfiguration.getCommandLine(actionName, buildVariables, artifactExpander)); | ||
| } catch (ExpansionException e) { | ||
| throw new CommandLineExpansionException(e.getMessage()); | ||
| } | ||
| // If this is a PIC compile (set based on the CppConfiguration), the PIC | ||
| // option should be added after the rest of the command line so that it | ||
| // cannot be overridden. This is consistent with the ordering in the | ||
| // CppCompileAction's compiler options. | ||
| if (usePic) { | ||
| args.add("-fPIC"); | ||
| } | ||
| return args.build(); | ||
| } | ||
| } |
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60 changes: 0 additions & 60 deletions
60
src/main/java/com/google/devtools/build/lib/rules/cpp/LtoBackendCommandLine.java
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