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//===- ClangTidyPlugin.cpp - clang-tidy as a clang plugin -----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "../ClangTidy.h"
#include "../ClangTidyDiagnosticConsumer.h"
#include "../ClangTidyForceLinker.h"
#include "../ClangTidyModule.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/FrontendPluginRegistry.h"
#include "clang/Frontend/MultiplexConsumer.h"
namespace clang {
namespace tidy {
/// The core clang tidy plugin action. This just provides the AST consumer and
/// command line flag parsing for using clang-tidy as a clang plugin.
class ClangTidyPluginAction : public PluginASTAction {
/// Wrapper to grant the context and diagnostics engine the same lifetime as
/// the action.
/// We use MultiplexConsumer to avoid writing out all the forwarding methods.
class WrapConsumer : public MultiplexConsumer {
std::unique_ptr<ClangTidyContext> Context;
std::unique_ptr<DiagnosticsEngine> DiagEngine;
public:
WrapConsumer(std::unique_ptr<ClangTidyContext> Context,
std::unique_ptr<DiagnosticsEngine> DiagEngine,
std::vector<std::unique_ptr<ASTConsumer>> Consumer)
: MultiplexConsumer(std::move(Consumer)), Context(std::move(Context)),
DiagEngine(std::move(DiagEngine)) {}
};
public:
std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &Compiler,
StringRef File) override {
// Create and set diagnostics engine
auto *DiagConsumer =
new ClangTidyDiagnosticConsumer(*Context, &Compiler.getDiagnostics());
auto DiagEngine = std::make_unique<DiagnosticsEngine>(
new DiagnosticIDs, new DiagnosticOptions, DiagConsumer);
Context->setDiagnosticsEngine(DiagEngine.get());
// Create the AST consumer.
ClangTidyASTConsumerFactory Factory(*Context);
std::vector<std::unique_ptr<ASTConsumer>> Vec;
Vec.push_back(Factory.createASTConsumer(Compiler, File));
return std::make_unique<WrapConsumer>(
std::move(Context), std::move(DiagEngine), std::move(Vec));
}
bool ParseArgs(const CompilerInstance &,
const std::vector<std::string> &Args) override {
ClangTidyGlobalOptions GlobalOptions;
ClangTidyOptions DefaultOptions;
ClangTidyOptions OverrideOptions;
// Parse the extra command line args.
// FIXME: This is very limited at the moment.
for (StringRef Arg : Args)
if (Arg.startswith("-checks="))
OverrideOptions.Checks = std::string(Arg.substr(strlen("-checks=")));
auto Options = std::make_unique<FileOptionsProvider>(
GlobalOptions, DefaultOptions, OverrideOptions);
Context = std::make_unique<ClangTidyContext>(std::move(Options));
return true;
}
private:
std::unique_ptr<ClangTidyContext> Context;
};
} // namespace tidy
} // namespace clang
// This anchor is used to force the linker to link in the generated object file
// and thus register the clang-tidy plugin.
volatile int ClangTidyPluginAnchorSource = 0;
static clang::FrontendPluginRegistry::Add<clang::tidy::ClangTidyPluginAction>
X("clang-tidy", "clang-tidy");
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