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llvm-project/clang-tools-extra/clang-tidy/tool/ClangTidyMain.cpp

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//===--- tools/extra/clang-tidy/ClangTidyMain.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 "clang/Tooling/CommonOptionsParser.h"
#include "llvm/Support/Process.h"
using namespace clang::ast_matchers;
using namespace clang::driver;
using namespace clang::tooling;
using namespace llvm;
static cl::OptionCategory ClangTidyCategory("clang-tidy options");
static cl::extrahelp CommonHelp(CommonOptionsParser::HelpMessage);
static cl::extrahelp ClangTidyHelp(
"Configuration files:\n"
" clang-tidy attempts to read configuration for each source file from a\n"
" .clang-tidy file located in the closest parent directory of the source\n"
" file. If any configuration options have a corresponding command-line\n"
" option, command-line option takes precedence. The effective\n"
" configuration can be inspected using -dump-config:\n"
"\n"
" $ clang-tidy -dump-config - --\n"
" ---\n"
" Checks: '-*,some-check'\n"
" HeaderFilterRegex: ''\n"
" AnalyzeTemporaryDtors: false\n"
" User: user\n"
" CheckOptions: \n"
" - key: some-check.SomeOption\n"
" value: 'some value'\n"
" ...\n"
"\n\n");
const char DefaultChecks[] = // Enable these checks:
"clang-diagnostic-*," // * compiler diagnostics
"clang-analyzer-*," // * Static Analyzer checks
"-clang-analyzer-alpha*"; // * but not alpha checks: many false positives
static cl::opt<std::string>
Checks("checks", cl::desc("Comma-separated list of globs with optional '-'\n"
"prefix. Globs are processed in order of appearance\n"
"in the list. Globs without '-' prefix add checks\n"
"with matching names to the set, globs with the '-'\n"
"prefix remove checks with matching names from the\n"
"set of enabled checks.\n"
"This option's value is appended to the value read\n"
"from a .clang-tidy file, if any."),
cl::init(""), cl::cat(ClangTidyCategory));
static cl::opt<std::string>
HeaderFilter("header-filter",
cl::desc("Regular expression matching the names of the\n"
"headers to output diagnostics from. Diagnostics\n"
"from the main file of each translation unit are\n"
"always displayed.\n"
"Can be used together with -line-filter.\n"
"This option overrides the value read from a\n"
".clang-tidy file."),
cl::init(""), cl::cat(ClangTidyCategory));
static cl::opt<bool>
SystemHeaders("system-headers",
cl::desc("Display the errors from system headers."),
cl::init(false), cl::cat(ClangTidyCategory));
static cl::opt<std::string>
LineFilter("line-filter",
cl::desc("List of files with line ranges to filter the\n"
"warnings. Can be used together with\n"
"-header-filter. The format of the list is a JSON\n"
"array of objects:\n"
" [\n"
" {\"name\":\"file1.cpp\",\"lines\":[[1,3],[5,7]]},\n"
" {\"name\":\"file2.h\"}\n"
" ]"),
cl::init(""), cl::cat(ClangTidyCategory));
static cl::opt<bool>
Fix("fix", cl::desc("Apply suggested fixes. Without -fix-errors\n"
"clang-tidy will bail out if any compilation\n"
"errors were found."),
cl::init(false), cl::cat(ClangTidyCategory));
static cl::opt<bool>
FixErrors("fix-errors",
cl::desc("Apply suggested fixes even if compilation errors\n"
"were found. If compiler errors have attached\n"
"fix-its, clang-tidy will apply them as well."),
cl::init(false), cl::cat(ClangTidyCategory));
static cl::opt<bool>
ListChecks("list-checks",
cl::desc("List all enabled checks and exit. Use with\n"
"-checks=* to list all available checks."),
cl::init(false), cl::cat(ClangTidyCategory));
static cl::opt<std::string> Config(
"config",
cl::desc("Specifies a configuration in YAML/JSON format:\n"
" -config=\"{Checks: '*', CheckOptions: [{key: x, value: y}]}\"\n"
"When the value is empty, clang-tidy will attempt to find\n"
"a file named .clang-tidy for each source file in its parent\n"
"directories."),
cl::init(""), cl::cat(ClangTidyCategory));
static cl::opt<bool> DumpConfig(
"dump-config",
cl::desc("Dumps configuration in the YAML format to stdout. This option\n"
"can be used along with a file name (and '--' if the file is\n"
"outside of a project with configured compilation database). The\n"
"configuration used for this file will be printed.\n"
"Use along with -checks=* to include configuration of all\n"
"checks.\n"),
cl::init(false), cl::cat(ClangTidyCategory));
static cl::opt<bool> EnableCheckProfile(
"enable-check-profile",
cl::desc("Enable per-check timing profiles, and print a report to stderr."),
cl::init(false), cl::cat(ClangTidyCategory));
static cl::opt<bool> AnalyzeTemporaryDtors(
"analyze-temporary-dtors",
cl::desc("Enable temporary destructor-aware analysis in\n"
"clang-analyzer- checks.\n"
"This option overrides the value read from a\n"
".clang-tidy file."),
cl::init(false), cl::cat(ClangTidyCategory));
static cl::opt<std::string> ExportFixes(
"export-fixes",
cl::desc("YAML file to store suggested fixes in. The\n"
"stored fixes can be applied to the input source\n"
"code with clang-apply-replacements."),
cl::value_desc("filename"), cl::cat(ClangTidyCategory));
namespace clang {
namespace tidy {
static void printStats(const ClangTidyStats &Stats) {
if (Stats.errorsIgnored()) {
llvm::errs() << "Suppressed " << Stats.errorsIgnored() << " warnings (";
StringRef Separator = "";
if (Stats.ErrorsIgnoredNonUserCode) {
llvm::errs() << Stats.ErrorsIgnoredNonUserCode << " in non-user code";
Separator = ", ";
}
if (Stats.ErrorsIgnoredLineFilter) {
llvm::errs() << Separator << Stats.ErrorsIgnoredLineFilter
<< " due to line filter";
Separator = ", ";
}
if (Stats.ErrorsIgnoredNOLINT) {
llvm::errs() << Separator << Stats.ErrorsIgnoredNOLINT << " NOLINT";
Separator = ", ";
}
if (Stats.ErrorsIgnoredCheckFilter)
llvm::errs() << Separator << Stats.ErrorsIgnoredCheckFilter
<< " with check filters";
llvm::errs() << ").\n";
if (Stats.ErrorsIgnoredNonUserCode)
llvm::errs() << "Use -header-filter=.* to display errors from all "
"non-system headers.\n";
}
}
static void printProfileData(const ProfileData &Profile,
llvm::raw_ostream &OS) {
// Time is first to allow for sorting by it.
std::vector<std::pair<llvm::TimeRecord, StringRef>> Timers;
TimeRecord Total;
for (const auto& P : Profile.Records) {
Timers.emplace_back(P.getValue(), P.getKey());
Total += P.getValue();
}
std::sort(Timers.begin(), Timers.end());
std::string Line = "===" + std::string(73, '-') + "===\n";
OS << Line;
if (Total.getUserTime())
OS << " ---User Time---";
if (Total.getSystemTime())
OS << " --System Time--";
if (Total.getProcessTime())
OS << " --User+System--";
OS << " ---Wall Time---";
if (Total.getMemUsed())
OS << " ---Mem---";
OS << " --- Name ---\n";
// Loop through all of the timing data, printing it out.
for (auto I = Timers.rbegin(), E = Timers.rend(); I != E; ++I) {
I->first.print(Total, OS);
OS << I->second << '\n';
}
Total.print(Total, OS);
OS << "Total\n";
OS << Line << "\n";
OS.flush();
}
static std::unique_ptr<ClangTidyOptionsProvider> createOptionsProvider() {
ClangTidyGlobalOptions GlobalOptions;
if (std::error_code Err = parseLineFilter(LineFilter, GlobalOptions)) {
llvm::errs() << "Invalid LineFilter: " << Err.message() << "\n\nUsage:\n";
llvm::cl::PrintHelpMessage(/*Hidden=*/false, /*Categorized=*/true);
return nullptr;
}
ClangTidyOptions DefaultOptions;
DefaultOptions.Checks = DefaultChecks;
DefaultOptions.HeaderFilterRegex = HeaderFilter;
DefaultOptions.SystemHeaders = SystemHeaders;
DefaultOptions.AnalyzeTemporaryDtors = AnalyzeTemporaryDtors;
DefaultOptions.User = llvm::sys::Process::GetEnv("USER");
// USERNAME is used on Windows.
if (!DefaultOptions.User)
DefaultOptions.User = llvm::sys::Process::GetEnv("USERNAME");
ClangTidyOptions OverrideOptions;
if (Checks.getNumOccurrences() > 0)
OverrideOptions.Checks = Checks;
if (HeaderFilter.getNumOccurrences() > 0)
OverrideOptions.HeaderFilterRegex = HeaderFilter;
if (SystemHeaders.getNumOccurrences() > 0)
OverrideOptions.SystemHeaders = SystemHeaders;
if (AnalyzeTemporaryDtors.getNumOccurrences() > 0)
OverrideOptions.AnalyzeTemporaryDtors = AnalyzeTemporaryDtors;
if (!Config.empty()) {
if (llvm::ErrorOr<ClangTidyOptions> ParsedConfig =
parseConfiguration(Config)) {
return llvm::make_unique<DefaultOptionsProvider>(
GlobalOptions, ClangTidyOptions::getDefaults()
.mergeWith(DefaultOptions)
.mergeWith(*ParsedConfig)
.mergeWith(OverrideOptions));
} else {
llvm::errs() << "Error: invalid configuration specified.\n"
<< ParsedConfig.getError().message() << "\n";
return nullptr;
}
}
return llvm::make_unique<FileOptionsProvider>(GlobalOptions, DefaultOptions,
OverrideOptions);
}
static int clangTidyMain(int argc, const char **argv) {
CommonOptionsParser OptionsParser(argc, argv, ClangTidyCategory,
cl::ZeroOrMore);
auto OptionsProvider = createOptionsProvider();
if (!OptionsProvider)
return 1;
StringRef FileName("dummy");
auto PathList = OptionsParser.getSourcePathList();
if (!PathList.empty()) {
FileName = PathList.front();
}
ClangTidyOptions EffectiveOptions = OptionsProvider->getOptions(FileName);
std::vector<std::string> EnabledChecks = getCheckNames(EffectiveOptions);
if (ListChecks) {
llvm::outs() << "Enabled checks:";
for (auto CheckName : EnabledChecks)
llvm::outs() << "\n " << CheckName;
llvm::outs() << "\n\n";
return 0;
}
if (DumpConfig) {
EffectiveOptions.CheckOptions = getCheckOptions(EffectiveOptions);
llvm::outs() << configurationAsText(
ClangTidyOptions::getDefaults().mergeWith(
EffectiveOptions))
<< "\n";
return 0;
}
if (EnabledChecks.empty()) {
llvm::errs() << "Error: no checks enabled.\n";
llvm::cl::PrintHelpMessage(/*Hidden=*/false, /*Categorized=*/true);
return 1;
}
if (PathList.empty()) {
llvm::errs() << "Error: no input files specified.\n";
llvm::cl::PrintHelpMessage(/*Hidden=*/false, /*Categorized=*/true);
return 1;
}
ProfileData Profile;
std::vector<ClangTidyError> Errors;
ClangTidyStats Stats =
runClangTidy(std::move(OptionsProvider), OptionsParser.getCompilations(),
PathList, &Errors,
EnableCheckProfile ? &Profile : nullptr);
bool FoundErrors =
std::find_if(Errors.begin(), Errors.end(), [](const ClangTidyError &E) {
return E.DiagLevel == ClangTidyError::Error;
}) != Errors.end();
const bool DisableFixes = Fix && FoundErrors && !FixErrors;
// -fix-errors implies -fix.
handleErrors(Errors, (FixErrors || Fix) && !DisableFixes);
if (!ExportFixes.empty() && !Errors.empty()) {
std::error_code EC;
llvm::raw_fd_ostream OS(ExportFixes, EC, llvm::sys::fs::F_None);
if (EC) {
llvm::errs() << "Error opening output file: " << EC.message() << '\n';
return 1;
}
exportReplacements(Errors, OS);
}
printStats(Stats);
if (DisableFixes)
llvm::errs()
<< "Found compiler errors, but -fix-errors was not specified.\n"
"Fixes have NOT been applied.\n\n";
if (EnableCheckProfile)
printProfileData(Profile, llvm::errs());
return 0;
}
// This anchor is used to force the linker to link the CERTModule.
extern volatile int CERTModuleAnchorSource;
static int LLVM_ATTRIBUTE_UNUSED CERTModuleAnchorDestination =
CERTModuleAnchorSource;
// This anchor is used to force the linker to link the LLVMModule.
extern volatile int LLVMModuleAnchorSource;
static int LLVM_ATTRIBUTE_UNUSED LLVMModuleAnchorDestination =
LLVMModuleAnchorSource;
// This anchor is used to force the linker to link the CppCoreGuidelinesModule.
extern volatile int CppCoreGuidelinesModuleAnchorSource;
static int LLVM_ATTRIBUTE_UNUSED CppCoreGuidelinesModuleAnchorDestination =
CppCoreGuidelinesModuleAnchorSource;
// This anchor is used to force the linker to link the GoogleModule.
extern volatile int GoogleModuleAnchorSource;
static int LLVM_ATTRIBUTE_UNUSED GoogleModuleAnchorDestination =
GoogleModuleAnchorSource;
// This anchor is used to force the linker to link the MiscModule.
extern volatile int MiscModuleAnchorSource;
static int LLVM_ATTRIBUTE_UNUSED MiscModuleAnchorDestination =
MiscModuleAnchorSource;
// This anchor is used to force the linker to link the ModernizeModule.
extern volatile int ModernizeModuleAnchorSource;
static int LLVM_ATTRIBUTE_UNUSED ModernizeModuleAnchorDestination =
ModernizeModuleAnchorSource;
// This anchor is used to force the linker to link the PerformanceModule.
extern volatile int PerformanceModuleAnchorSource;
static int LLVM_ATTRIBUTE_UNUSED PerformanceModuleAnchorDestination =
PerformanceModuleAnchorSource;
// This anchor is used to force the linker to link the ReadabilityModule.
extern volatile int ReadabilityModuleAnchorSource;
static int LLVM_ATTRIBUTE_UNUSED ReadabilityModuleAnchorDestination =
ReadabilityModuleAnchorSource;
} // namespace tidy
} // namespace clang
int main(int argc, const char **argv) {
return clang::tidy::clangTidyMain(argc, argv);
}
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