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// 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.objc;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.actions.Root;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.rules.cpp.CppCompilationContext.Builder;
import com.google.devtools.build.lib.rules.cpp.CppCompileActionBuilder;
import com.google.devtools.build.lib.rules.cpp.CppCompileActionContext;
import com.google.devtools.build.lib.rules.cpp.CppConfiguration;
import com.google.devtools.build.lib.rules.cpp.CppConfiguration.HeadersCheckingMode;
import com.google.devtools.build.lib.rules.cpp.CppHelper;
import com.google.devtools.build.lib.rules.cpp.CppSemantics;
import com.google.devtools.build.lib.vfs.PathFragment;
/**
* CppSemantics for objc builds.
*/
public class ObjcCppSemantics implements CppSemantics {
// We make CppSemantics a singleton object for efficiency and consistency, since we expect
// any instance to be identical.
public static final CppSemantics INSTANCE = new ObjcCppSemantics();
@Override
public PathFragment getEffectiveSourcePath(Artifact source) {
return source.getRootRelativePath();
}
@Override
public void finalizeCompileActionBuilder(
RuleContext ruleContext, CppCompileActionBuilder actionBuilder) {
actionBuilder.setCppConfiguration(ruleContext.getFragment(CppConfiguration.class));
actionBuilder.setActionContext(CppCompileActionContext.class);
// Because Bazel does not support include scanning, we need the entire crosstool filegroup,
// including header files, as opposed to just the "compile" filegroup.
actionBuilder.addTransitiveMandatoryInputs(CppHelper.getToolchain(ruleContext).getCrosstool());
actionBuilder.setShouldScanIncludes(false);
}
@Override
public void setupCompilationContext(RuleContext ruleContext, Builder contextBuilder) {
// For objc builds, no extra setup is required.
}
@Override
public HeadersCheckingMode determineHeadersCheckingMode(RuleContext ruleContext) {
// Currently, objc builds do not enforce strict deps. To begin enforcing strict deps in objc,
// switch this flag to STRICT.
return HeadersCheckingMode.WARN;
}
@Override
public boolean needsIncludeScanning(RuleContext ruleContext) {
return false;
}
@Override
public Root getGreppedIncludesDirectory(RuleContext ruleContext) {
return null;
}
}
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