com.facebook.buck.cxx.ClangPreprocessor.java Source code

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Here is the source code for com.facebook.buck.cxx.ClangPreprocessor.java

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/*
 * Copyright 2015-present Facebook, Inc.
 *
 * 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.facebook.buck.cxx;

import com.facebook.buck.rules.SourcePath;
import com.facebook.buck.rules.SourcePathResolver;
import com.facebook.buck.rules.Tool;
import com.facebook.buck.util.MoreIterables;

import com.google.common.collect.Iterables;
import com.google.common.collect.ImmutableList;

import java.nio.file.Path;
import java.util.Optional;

public class ClangPreprocessor extends AbstractPreprocessor {

    public ClangPreprocessor(Tool tool) {
        super(tool);
    }

    @Override
    public Optional<ImmutableList<String>> getFlagsForColorDiagnostics() {
        return Optional.of(ImmutableList.of("-fcolor-diagnostics"));
    }

    @Override
    public boolean supportsHeaderMaps() {
        return true;
    }

    @Override
    public boolean supportsPrecompiledHeaders() {
        return true;
    }

    @Override
    public final Iterable<String> localIncludeArgs(Iterable<String> includeRoots) {
        return MoreIterables.zipAndConcat(Iterables.cycle("-I"), includeRoots);
    }

    @Override
    public final Iterable<String> systemIncludeArgs(Iterable<String> includeRoots) {
        return MoreIterables.zipAndConcat(Iterables.cycle("-isystem"), includeRoots);
    }

    @Override
    public final Iterable<String> quoteIncludeArgs(Iterable<String> includeRoots) {
        return MoreIterables.zipAndConcat(Iterables.cycle("-iquote"), includeRoots);
    }

    @Override
    public final Iterable<String> prefixHeaderArgs(SourcePathResolver resolver, SourcePath prefixHeader) {
        return ImmutableList.of("-include", resolver.getAbsolutePath(prefixHeader).toString());
    }

    @Override
    public Iterable<String> precompiledHeaderArgs(Path pchOutputPath) {
        return ImmutableList.of("-include-pch", pchOutputPath.toString(),
                // Force clang to accept pch even if mtime of its input changes, since buck tracks
                // input contents, this should be safe.
                "-Wp,-fno-validate-pch");
    }

}