llvm/clang/tools/clang-check/ClangCheck.cpp

//===--- tools/clang-check/ClangCheck.cpp - Clang check tool --------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
//  This file implements a clang-check tool that runs clang based on the info
//  stored in a compilation database.
//
//  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 "clang/AST/ASTConsumer.h"
#include "clang/Driver/Options.h"
#include "clang/Frontend/ASTConsumers.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Rewrite/Frontend/FixItRewriter.h"
#include "clang/Rewrite/Frontend/FrontendActions.h"
#include "clang/StaticAnalyzer/Frontend/FrontendActions.h"
#include "clang/Tooling/CommonOptionsParser.h"
#include "clang/Tooling/Syntax/BuildTree.h"
#include "clang/Tooling/Syntax/TokenBufferTokenManager.h"
#include "clang/Tooling/Syntax/Tokens.h"
#include "clang/Tooling/Syntax/Tree.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Option/OptTable.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/TargetSelect.h"

usingnamespaceclang::driver;
usingnamespaceclang::tooling;
usingnamespacellvm;

static cl::extrahelp CommonHelp(CommonOptionsParser::HelpMessage);
static cl::extrahelp MoreHelp(
    "\tFor example, to run clang-check on all files in a subtree of the\n"
    "\tsource tree, use:\n"
    "\n"
    "\t  find path/in/subtree -name '*.cpp'|xargs clang-check\n"
    "\n"
    "\tor using a specific build path:\n"
    "\n"
    "\t  find path/in/subtree -name '*.cpp'|xargs clang-check -p build/path\n"
    "\n"
    "\tNote, that path/in/subtree and current directory should follow the\n"
    "\trules described above.\n"
    "\n"
);

static cl::OptionCategory ClangCheckCategory("clang-check options");
static const opt::OptTable &Options = …;
static cl::opt<bool>
    ASTDump("ast-dump",
            cl::desc(Options.getOptionHelpText(options::OPT_ast_dump)),
            cl::cat(ClangCheckCategory));
static cl::opt<bool>
    ASTList("ast-list",
            cl::desc(Options.getOptionHelpText(options::OPT_ast_list)),
            cl::cat(ClangCheckCategory));
static cl::opt<bool>
    ASTPrint("ast-print",
             cl::desc(Options.getOptionHelpText(options::OPT_ast_print)),
             cl::cat(ClangCheckCategory));
static cl::opt<std::string> ASTDumpFilter(
    "ast-dump-filter",
    cl::desc(Options.getOptionHelpText(options::OPT_ast_dump_filter)),
    cl::cat(ClangCheckCategory));
static cl::opt<bool>
    Analyze("analyze",
            cl::desc(Options.getOptionHelpText(options::OPT_analyze)),
            cl::cat(ClangCheckCategory));
static cl::opt<std::string>
    AnalyzerOutput("analyzer-output-path",
                   cl::desc(Options.getOptionHelpText(options::OPT_o)),
                   cl::cat(ClangCheckCategory));

static cl::opt<bool>
    Fixit("fixit", cl::desc(Options.getOptionHelpText(options::OPT_fixit)),
          cl::cat(ClangCheckCategory));
static cl::opt<bool> FixWhatYouCan(
    "fix-what-you-can",
    cl::desc(Options.getOptionHelpText(options::OPT_fix_what_you_can)),
    cl::cat(ClangCheckCategory));

static cl::opt<bool> SyntaxTreeDump("syntax-tree-dump",
                                    cl::desc("dump the syntax tree"),
                                    cl::cat(ClangCheckCategory));
static cl::opt<bool> TokensDump("tokens-dump",
                                cl::desc("dump the preprocessed tokens"),
                                cl::cat(ClangCheckCategory));

namespace {

// FIXME: Move FixItRewriteInPlace from lib/Rewrite/Frontend/FrontendActions.cpp
// into a header file and reuse that.
class FixItOptions : public clang::FixItOptions { … };

/// Subclasses \c clang::FixItRewriter to not count fixed errors/warnings
/// in the final error counts.
///
/// This has the side-effect that clang-check -fixit exits with code 0 on
/// successfully fixing all errors.
class FixItRewriter : public clang::FixItRewriter { … };

/// Subclasses \c clang::FixItAction so that we can install the custom
/// \c FixItRewriter.
class ClangCheckFixItAction : public clang::FixItAction { … };

class DumpSyntaxTree : public clang::ASTFrontendAction { … };

class ClangCheckActionFactory { … };

} // namespace

int main(int argc, const char **argv) { … }