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//===--- tools/extra/clang-tidy/ClangTidy.cpp - Clang tidy tool -----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file This file implements a clang-tidy tool.
///
/// This tool uses the Clang Tooling infrastructure, see
/// http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html
/// for details on setting it up with LLVM source tree.
///
//===----------------------------------------------------------------------===//
#include "ClangTidy.h"
#include "ClangTidyDiagnosticConsumer.h"
#include "ClangTidyModuleRegistry.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/Lex/PPCallbacks.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Frontend/ASTConsumers.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/FrontendActions.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "clang/Rewrite/Frontend/FixItRewriter.h"
#include "clang/Rewrite/Frontend/FrontendActions.h"
#include "clang/Tooling/Tooling.h"
#include "clang/Tooling/Refactoring.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Signals.h"
#include <vector>
using namespace clang::ast_matchers;
using namespace clang::driver;
using namespace clang::tooling;
using namespace llvm;
namespace clang {
namespace tidy {
namespace {
class ClangTidyPPAction : public PreprocessOnlyAction {
public:
ClangTidyPPAction(SmallVectorImpl<ClangTidyCheck *> &Checks,
ClangTidyContext &Context)
: Checks(Checks), Context(Context) {}
private:
virtual bool BeginSourceFileAction(CompilerInstance &Compiler,
llvm::StringRef file_name) {
Context.setSourceManager(&Compiler.getSourceManager());
for (SmallVectorImpl<ClangTidyCheck *>::iterator I = Checks.begin(),
E = Checks.end();
I != E; ++I)
(*I)->registerPPCallbacks(Compiler);
return true;
}
SmallVectorImpl<ClangTidyCheck *> &Checks;
ClangTidyContext &Context;
};
class ClangTidyPPActionFactory : public FrontendActionFactory {
public:
ClangTidyPPActionFactory(SmallVectorImpl<ClangTidyCheck *> &Checks,
ClangTidyContext &Context)
: Checks(Checks), Context(Context) {}
virtual FrontendAction *create() {
return new ClangTidyPPAction(Checks, Context);
}
private:
SmallVectorImpl<ClangTidyCheck *> &Checks;
ClangTidyContext &Context;
};
} // namespace
ClangTidyError::ClangTidyError(const SourceManager &Sources, SourceLocation Loc,
StringRef Message,
const tooling::Replacements &Fix)
: Message(Message), Fix(Fix) {
FilePath = Sources.getFilename(Loc);
FileOffset = Sources.getFileOffset(Loc);
}
DiagnosticBuilder ClangTidyContext::Diag(SourceLocation Loc,
StringRef Message) {
return DiagEngine->Report(
Loc, DiagEngine->getCustomDiagID(DiagnosticsEngine::Warning, Message));
}
void ClangTidyContext::setDiagnosticsEngine(DiagnosticsEngine *Engine) {
DiagEngine = Engine;
}
void ClangTidyContext::setSourceManager(SourceManager *SourceMgr) {
DiagEngine->setSourceManager(SourceMgr);
}
/// \brief Store a \c ClangTidyError.
void ClangTidyContext::storeError(const ClangTidyError &Error) {
Errors->push_back(Error);
}
void ClangTidyCheck::run(const ast_matchers::MatchFinder::MatchResult &Result) {
Context->setSourceManager(Result.SourceManager);
check(Result);
}
void runClangTidy(StringRef CheckRegexString,
const tooling::CompilationDatabase &Compilations,
ArrayRef<std::string> Ranges,
SmallVectorImpl<ClangTidyError> *Errors) {
// FIXME: Ranges are currently full files. Support selecting specific
// (line-)ranges.
ClangTool Tool(Compilations, Ranges);
clang::tidy::ClangTidyContext Context(Errors);
ClangTidyDiagnosticConsumer DiagConsumer(Context);
ClangTidyCheckFactories CheckFactories;
for (ClangTidyModuleRegistry::iterator I = ClangTidyModuleRegistry::begin(),
E = ClangTidyModuleRegistry::end();
I != E; ++I) {
OwningPtr<ClangTidyModule> Module(I->instantiate());
Module->addCheckFactories(CheckFactories);
}
SmallVector<ClangTidyCheck *, 16> Checks;
CheckFactories.createChecks(CheckRegexString, Checks);
MatchFinder Finder;
for (SmallVectorImpl<ClangTidyCheck *>::iterator I = Checks.begin(),
E = Checks.end();
I != E; ++I) {
(*I)->setContext(&Context);
(*I)->registerMatchers(&Finder);
}
Tool.run(new ClangTidyPPActionFactory(Checks, Context));
Tool.run(newFrontendActionFactory(&Finder));
}
void handleErrors(SmallVectorImpl<ClangTidyError> &Errors, bool Fix) {
FileManager Files((FileSystemOptions()));
IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
DiagnosticConsumer *DiagPrinter =
new TextDiagnosticPrinter(llvm::outs(), &*DiagOpts);
DiagnosticsEngine Diags(IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs),
&*DiagOpts, DiagPrinter);
DiagPrinter->BeginSourceFile(LangOptions());
SourceManager SourceMgr(Diags, Files);
Rewriter Rewrite(SourceMgr, LangOptions());
for (SmallVectorImpl<ClangTidyError>::iterator I = Errors.begin(),
E = Errors.end();
I != E; ++I) {
const FileEntry *File = Files.getFile(I->FilePath);
FileID ID = SourceMgr.createFileID(File, SourceLocation(), SrcMgr::C_User);
SourceLocation Loc = SourceMgr.getLocForStartOfFile(ID);
Diags.Report(Loc.getLocWithOffset(I->FileOffset),
Diags.getCustomDiagID(DiagnosticsEngine::Warning, I->Message));
tooling::applyAllReplacements(I->Fix, Rewrite);
}
// FIXME: Run clang-format on changes.
if (Fix)
Rewrite.overwriteChangedFiles();
}
// This anchor is used to force the linker to link the LLVMModule.
extern volatile int LLVMModuleAnchorSource;
static int LLVMModuleAnchorDestination = LLVMModuleAnchorSource;
// This anchor is used to force the linker to link the GoogleModule.
extern volatile int GoogleModuleAnchorSource;
static int GoogleModuleAnchorDestination = GoogleModuleAnchorSource;
} // namespace tidy
} // namespace clang
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