Method checkClang

lib/cppcheck.cpp:669–786

TODO: clear error list before returning

// TODO: clear error list before returning
unsigned int CppCheck::checkClang(const FileWithDetails &file)
{
    // TODO: clear exitcode

    if (mSettings.checks.isEnabled(Checks::unusedFunction) && !mUnusedFunctionsCheck)
        mUnusedFunctionsCheck.reset(new CheckUnusedFunctions());

    if (!mSettings.quiet)
        mErrorLogger.reportOut(std::string("Checking ") + file.spath() + " ...", Color::FgGreen);

    // TODO: get language from FileWithDetails object
    std::string clangStderr;
    if (!mSettings.buildDir.empty())
        clangStderr = AnalyzerInformation::getAnalyzerInfoFile(mSettings.buildDir, file.spath(), "", file.fsFileId()) + ".clang-stderr";

    std::string exe = mSettings.clangExecutable;
#ifdef _WIN32
    // append .exe if it is not a path
    if (Path::fromNativeSeparators(mSettings.clangExecutable).find('/') == std::string::npos) {
        exe += ".exe";
    }
#endif

    const std::string args2 = "-fsyntax-only -Xclang -ast-dump -fno-color-diagnostics " +
                              getClangFlags(mSettings, file.lang()) +
                              file.spath();
    const std::string redirect2 = clangStderr.empty() ? "2>&1" : ("2> " + clangStderr);
    if (mSettings.verbose && !mSettings.quiet) {
        mErrorLogger.reportOut(exe + " " + args2, Color::Reset);
    }

    if (!mExecuteCommand) {
        std::cerr << "Failed to execute '" << exe << " " << args2 << " " << redirect2 << "' - (no command callback provided)" << std::endl;
        return 0; // TODO: report as failure?
    }

    std::string output2;
    const int exitcode = mExecuteCommand(exe,split(args2),redirect2,output2);
    if (mSettings.debugClangOutput) {
        std::cout << output2 << std::endl;
    }
    // TODO: this might also fail if compiler errors are encountered - we should report them properly
    if (exitcode != EXIT_SUCCESS) {
        // TODO: report as proper error
        std::cerr << "Failed to execute '" << exe << " " << args2 << " " << redirect2 << "' - (exitcode: " << exitcode << " / output: " << output2 << ")" << std::endl;
        return 0; // TODO: report as failure?
    }

    if (output2.find("TranslationUnitDecl") == std::string::npos) {
        // TODO: report as proper error
        std::cerr << "Failed to execute '" << exe << " " << args2 << " " << redirect2 << "' - (no TranslationUnitDecl in output)" << std::endl;
        return 0; // TODO: report as failure?
    }

    const auto reportError = [this](const ErrorMessage& errorMessage) {
        mErrorLogger.reportErr(errorMessage);
    };