/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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****************************************************************************/

#include "msvctoolchain.h"

#include "gcctoolchain.h"
#include "msvcparser.h"
#include "projectexplorer.h"
#include "projectexplorerconstants.h"
#include "projectexplorersettings.h"
#include "taskhub.h"
#include "toolchainmanager.h"

#include <coreplugin/icore.h>

#include <utils/algorithm.h>
#include <utils/hostosinfo.h>
#include <utils/optional.h>
#include <utils/qtcassert.h>
#include <utils/qtcprocess.h>
#include <utils/synchronousprocess.h>
#include <utils/runextensions.h>
#include <utils/temporarydirectory.h>
#include <utils/pathchooser.h>
#include <utils/winutils.h>

#include <QDir>
#include <QFileInfo>
#include <QJsonArray>
#include <QJsonDocument>
#include <QProcess>
#include <QRegularExpression>
#include <QSettings>
#include <QVector>
#include <QVersionNumber>

#include <QLabel>
#include <QComboBox>
#include <QFormLayout>

using namespace Utils;

#define KEY_ROOT "ProjectExplorer.MsvcToolChain."
static const char varsBatKeyC[] = KEY_ROOT "VarsBat";
static const char varsBatArgKeyC[] = KEY_ROOT "VarsBatArg";
static const char supportedAbiKeyC[] = KEY_ROOT "SupportedAbi";
static const char supportedAbisKeyC[] = KEY_ROOT "SupportedAbis";
static const char environModsKeyC[] = KEY_ROOT "environmentModifications";

enum { debug = 0 };

namespace ProjectExplorer {
namespace Internal {

// --------------------------------------------------------------------------
// Helpers:
// --------------------------------------------------------------------------

static QThreadPool *envModThreadPool()
{
    static QThreadPool *pool = nullptr;
    if (!pool) {
        pool = new QThreadPool(ProjectExplorerPlugin::instance());
        pool->setMaxThreadCount(1);
    }
    return pool;
}

struct MsvcPlatform
{
    MsvcToolChain::Platform platform;
    const char *name;
    const char *prefix; // VS up until 14.0 (MSVC2015)
    const char *bat;
};

const MsvcPlatform platforms[]
    = {{MsvcToolChain::x86, "x86", "/bin", "vcvars32.bat"},
       {MsvcToolChain::amd64, "amd64", "/bin/amd64", "vcvars64.bat"},
       {MsvcToolChain::x86_amd64, "x86_amd64", "/bin/x86_amd64", "vcvarsx86_amd64.bat"},
       {MsvcToolChain::ia64, "ia64", "/bin/ia64", "vcvars64.bat"},
       {MsvcToolChain::x86_ia64, "x86_ia64", "/bin/x86_ia64", "vcvarsx86_ia64.bat"},
       {MsvcToolChain::arm, "arm", "/bin/arm", "vcvarsarm.bat"},
       {MsvcToolChain::x86_arm, "x86_arm", "/bin/x86_arm", "vcvarsx86_arm.bat"},
       {MsvcToolChain::amd64_arm, "amd64_arm", "/bin/amd64_arm", "vcvarsamd64_arm.bat"},
       {MsvcToolChain::amd64_x86, "amd64_x86", "/bin/amd64_x86", "vcvarsamd64_x86.bat"}};

static QList<const MsvcToolChain *> g_availableMsvcToolchains;

static const MsvcPlatform *platformEntry(MsvcToolChain::Platform t)
{
    for (const MsvcPlatform &p : platforms) {
        if (p.platform == t)
            return &p;
    }
    return nullptr;
}

static QString platformName(MsvcToolChain::Platform t)
{
    if (const MsvcPlatform *p = platformEntry(t))
        return QLatin1String(p->name);
    return QString();
}

static bool hostSupportsPlatform(MsvcToolChain::Platform platform)
{
    switch (Utils::HostOsInfo::hostArchitecture()) {
    case Utils::HostOsInfo::HostArchitectureAMD64:
        if (platform == MsvcToolChain::amd64 || platform == MsvcToolChain::amd64_arm
            || platform == MsvcToolChain::amd64_x86)
            return true;
        Q_FALLTHROUGH(); // all x86 toolchains are also working on an amd64 host
    case Utils::HostOsInfo::HostArchitectureX86:
        return platform == MsvcToolChain::x86 || platform == MsvcToolChain::x86_amd64
               || platform == MsvcToolChain::x86_ia64 || platform == MsvcToolChain::x86_arm;
    case Utils::HostOsInfo::HostArchitectureArm:
        return platform == MsvcToolChain::arm;
    case Utils::HostOsInfo::HostArchitectureItanium:
        return platform == MsvcToolChain::ia64;
    default:
        return false;
    }
}

static QString fixRegistryPath(const QString &path)
{
    QString result = QDir::fromNativeSeparators(path);
    if (result.endsWith(QLatin1Char('/')))
        result.chop(1);
    return result;
}

struct VisualStudioInstallation
{
    QString vsName;
    QVersionNumber version;
    QString path;       // Main installation path
    QString vcVarsPath; // Path under which the various vc..bat are to be found
    QString vcVarsAll;
};

QDebug operator<<(QDebug d, const VisualStudioInstallation &i)
{
    QDebugStateSaver saver(d);
    d.noquote();
    d.nospace();
    d << "VisualStudioInstallation(\"" << i.vsName << "\", v=" << i.version << ", path=\""
      << QDir::toNativeSeparators(i.path) << "\", vcVarsPath=\""
      << QDir::toNativeSeparators(i.vcVarsPath) << "\", vcVarsAll=\""
      << QDir::toNativeSeparators(i.vcVarsAll) << "\")";
    return d;
}

static QString windowsProgramFilesDir()
{
#ifdef Q_OS_WIN64
    const char programFilesC[] = "ProgramFiles(x86)";
#else
    const char programFilesC[] = "ProgramFiles";
#endif
    return QDir::fromNativeSeparators(QFile::decodeName(qgetenv(programFilesC)));
}

static Utils::optional<VisualStudioInstallation> installationFromPathAndVersion(
    const QString &installationPath, const QVersionNumber &version)
{
    QString vcVarsPath = QDir::fromNativeSeparators(installationPath);
    if (!vcVarsPath.endsWith('/'))
        vcVarsPath += '/';
    if (version.majorVersion() > 14)
        vcVarsPath += QStringLiteral("VC/Auxiliary/Build");
    else
        vcVarsPath += QStringLiteral("VC");

    const QString vcVarsAllPath = vcVarsPath + QStringLiteral("/vcvarsall.bat");
    if (!QFileInfo(vcVarsAllPath).isFile()) {
        qWarning().noquote() << "Unable to find MSVC setup script "
                             << QDir::toNativeSeparators(vcVarsPath) << " in version " << version;
        return Utils::nullopt;
    }

    const QString versionString = version.toString();
    VisualStudioInstallation installation;
    installation.path = installationPath;
    installation.version = version;
    installation.vsName = versionString;
    installation.vcVarsPath = vcVarsPath;
    installation.vcVarsAll = vcVarsAllPath;
    return installation;
}

// Detect build tools introduced with MSVC2017
static Utils::optional<VisualStudioInstallation> detectCppBuildTools2017()
{
    const QString installPath = windowsProgramFilesDir()
                                + "/Microsoft Visual Studio/2017/BuildTools";
    const QString vcVarsPath = installPath + "/VC/Auxiliary/Build";
    const QString vcVarsAllPath = vcVarsPath + "/vcvarsall.bat";

    if (!QFileInfo::exists(vcVarsAllPath))
        return Utils::nullopt;

    VisualStudioInstallation installation;
    installation.path = installPath;
    installation.vcVarsAll = vcVarsAllPath;
    installation.vcVarsPath = vcVarsPath;
    installation.version = QVersionNumber(15);
    installation.vsName = "15.0";

    return installation;
}

static QVector<VisualStudioInstallation> detectVisualStudioFromVsWhere(const QString &vswhere)
{
    QVector<VisualStudioInstallation> installations;
    Utils::SynchronousProcess vsWhereProcess;
    const int timeoutS = 5;
    vsWhereProcess.setTimeoutS(timeoutS);
    const QStringList
        arguments{"-products", "*", "-prerelease", "-legacy", "-format", "json", "-utf8"};
    Utils::SynchronousProcessResponse response = vsWhereProcess.runBlocking(vswhere, arguments);
    switch (response.result) {
    case Utils::SynchronousProcessResponse::Finished:
        break;
    case Utils::SynchronousProcessResponse::StartFailed:
        qWarning().noquote() << QDir::toNativeSeparators(vswhere) << "could not be started.";
        return installations;
    case Utils::SynchronousProcessResponse::FinishedError:
        qWarning().noquote().nospace() << QDir::toNativeSeparators(vswhere)
                                       << " finished with exit code "
                                       << response.exitCode << ".";
        return installations;
    case Utils::SynchronousProcessResponse::TerminatedAbnormally:
        qWarning().noquote().nospace()
            << QDir::toNativeSeparators(vswhere) << " crashed. Exit code: " << response.exitCode;
        return installations;
    case Utils::SynchronousProcessResponse::Hang:
        qWarning().noquote() << QDir::toNativeSeparators(vswhere) << "did not finish in" << timeoutS
                             << "seconds.";
        return installations;
    }

    QByteArray output = response.stdOut().toUtf8();
    QJsonParseError error;
    const QJsonDocument doc = QJsonDocument::fromJson(output, &error);
    if (error.error != QJsonParseError::NoError || doc.isNull()) {
        qWarning() << "Could not parse json document from vswhere output.";
        return installations;
    }

    const QJsonArray versions = doc.array();
    if (versions.isEmpty()) {
        qWarning() << "Could not detect any versions from vswhere output.";
        return installations;
    }

    for (const QJsonValue &vsVersion : versions) {
        const QJsonObject vsVersionObj = vsVersion.toObject();
        if (vsVersionObj.isEmpty()) {
            qWarning() << "Could not obtain object from vswhere version";
            continue;
        }

        QJsonValue value = vsVersionObj.value("installationVersion");
        if (value.isUndefined()) {
            qWarning() << "Could not obtain VS version from json output";
            continue;
        }
        const QString versionString = value.toString();
        QVersionNumber version = QVersionNumber::fromString(versionString);
        value = vsVersionObj.value("installationPath");
        if (value.isUndefined()) {
            qWarning() << "Could not obtain VS installation path from json output";
            continue;
        }
        const QString installationPath = value.toString();
        Utils::optional<VisualStudioInstallation> installation
            = installationFromPathAndVersion(installationPath, version);

        if (installation)
            installations.append(*installation);
    }
    return installations;
}

static QVector<VisualStudioInstallation> detectVisualStudioFromRegistry()
{
    QVector<VisualStudioInstallation> result;
#ifdef Q_OS_WIN64
    const QString keyRoot = QStringLiteral(
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\Microsoft\\VisualStudio\\SxS\\");
#else
    const QString keyRoot = QStringLiteral(
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\SxS\\");
#endif
    QSettings vsRegistry(keyRoot + QStringLiteral("VS7"), QSettings::NativeFormat);
    QScopedPointer<QSettings> vcRegistry;
    foreach (const QString &vsName, vsRegistry.allKeys()) {
        const QVersionNumber version = QVersionNumber::fromString(vsName);
        if (!version.isNull()) {
            const QString installationPath = fixRegistryPath(vsRegistry.value(vsName).toString());

            Utils::optional<VisualStudioInstallation> installation
                = installationFromPathAndVersion(installationPath, version);
            if (installation)
                result.append(*installation);
        }
    }

    // Detect VS 2017 Build Tools
    auto installation = detectCppBuildTools2017();
    if (installation)
        result.append(*installation);

    return result;
}

static QVector<VisualStudioInstallation> detectVisualStudio()
{
    const QString vswhere = windowsProgramFilesDir()
                            + "/Microsoft Visual Studio/Installer/vswhere.exe";
    if (QFileInfo::exists(vswhere)) {
        const QVector<VisualStudioInstallation> installations = detectVisualStudioFromVsWhere(
            vswhere);
        if (!installations.isEmpty())
            return installations;
    }

    return detectVisualStudioFromRegistry();
}

static unsigned char wordWidthForPlatform(MsvcToolChain::Platform platform)
{
    switch (platform) {
    case ProjectExplorer::Internal::MsvcToolChain::x86:
    case ProjectExplorer::Internal::MsvcToolChain::arm:
    case ProjectExplorer::Internal::MsvcToolChain::x86_arm:
    case ProjectExplorer::Internal::MsvcToolChain::amd64_arm:
    case ProjectExplorer::Internal::MsvcToolChain::amd64_x86:
        return 32;
    case ProjectExplorer::Internal::MsvcToolChain::amd64:
    case ProjectExplorer::Internal::MsvcToolChain::x86_amd64:
    case ProjectExplorer::Internal::MsvcToolChain::ia64:
    case ProjectExplorer::Internal::MsvcToolChain::x86_ia64:
        return 64;
    }

    return 0;
}

static Abi::Architecture archForPlatform(MsvcToolChain::Platform platform)
{
    switch (platform) {
    case ProjectExplorer::Internal::MsvcToolChain::x86:
    case ProjectExplorer::Internal::MsvcToolChain::amd64:
    case ProjectExplorer::Internal::MsvcToolChain::x86_amd64:
    case ProjectExplorer::Internal::MsvcToolChain::amd64_x86:
        return Abi::X86Architecture;
    case ProjectExplorer::Internal::MsvcToolChain::arm:
    case ProjectExplorer::Internal::MsvcToolChain::x86_arm:
    case ProjectExplorer::Internal::MsvcToolChain::amd64_arm:
        return Abi::ArmArchitecture;
    case ProjectExplorer::Internal::MsvcToolChain::ia64:
    case ProjectExplorer::Internal::MsvcToolChain::x86_ia64:
        return Abi::ItaniumArchitecture;
    }

    return Abi::UnknownArchitecture;
}

static Abi findAbiOfMsvc(MsvcToolChain::Type type,
                         MsvcToolChain::Platform platform,
                         const QString &version)
{
    Abi::OSFlavor flavor = Abi::UnknownFlavor;

    QString msvcVersionString = version;
    if (type == MsvcToolChain::WindowsSDK) {
        if (version == QLatin1String("v7.0") || version.startsWith(QLatin1String("6.")))
            msvcVersionString = QLatin1String("9.0");
        else if (version == QLatin1String("v7.0A") || version == QLatin1String("v7.1"))
            msvcVersionString = QLatin1String("10.0");
    }
    if (msvcVersionString.startsWith(QLatin1String("16.")))
        flavor = Abi::WindowsMsvc2019Flavor;
    else if (msvcVersionString.startsWith(QLatin1String("15.")))
        flavor = Abi::WindowsMsvc2017Flavor;
    else if (msvcVersionString.startsWith(QLatin1String("14.")))
        flavor = Abi::WindowsMsvc2015Flavor;
    else if (msvcVersionString.startsWith(QLatin1String("12.")))
        flavor = Abi::WindowsMsvc2013Flavor;
    else if (msvcVersionString.startsWith(QLatin1String("11.")))
        flavor = Abi::WindowsMsvc2012Flavor;
    else if (msvcVersionString.startsWith(QLatin1String("10.")))
        flavor = Abi::WindowsMsvc2010Flavor;
    else if (msvcVersionString.startsWith(QLatin1String("9.")))
        flavor = Abi::WindowsMsvc2008Flavor;
    else
        flavor = Abi::WindowsMsvc2005Flavor;
    const Abi result = Abi(archForPlatform(platform), Abi::WindowsOS, flavor, Abi::PEFormat,
                           wordWidthForPlatform(platform));
    if (!result.isValid())
        qWarning("Unable to completely determine the ABI of MSVC version %s (%s).",
                 qPrintable(version),
                 qPrintable(result.toString()));
    return result;
}

static QString generateDisplayName(const QString &name,
                                   MsvcToolChain::Type t,
                                   MsvcToolChain::Platform p)
{
    if (t == MsvcToolChain::WindowsSDK) {
        QString sdkName = name;
        sdkName += QString::fromLatin1(" (%1)").arg(platformName(p));
        return sdkName;
    }
    // Comes as "9.0" from the registry
    QString vcName = QLatin1String("Microsoft Visual C++ Compiler ");
    vcName += name;
    vcName += QString::fromLatin1(" (%1)").arg(platformName(p));
    return vcName;
}

static QByteArray msvcCompilationDefine(const char *def)
{
    const QByteArray macro(def);
    return "#if defined(" + macro + ")\n__PPOUT__(" + macro + ")\n#endif\n";
}

static QByteArray msvcCompilationFile()
{
    static const char *macros[] = {"_ATL_VER",
                                   "__ATOM__",
                                   "__AVX__",
                                   "__AVX2__",
                                   "_CHAR_UNSIGNED",
                                   "__CLR_VER",
                                   "_CMMN_INTRIN_FUNC",
                                   "_CONTROL_FLOW_GUARD",
                                   "__cplusplus",
                                   "__cplusplus_cli",
                                   "__cplusplus_winrt",
                                   "_CPPLIB_VER",
                                   "_CPPRTTI",
                                   "_CPPUNWIND",
                                   "_DEBUG",
                                   "_DLL",
                                   "_INTEGRAL_MAX_BITS",
                                   "__INTELLISENSE__",
                                   "_ISO_VOLATILE",
                                   "_KERNEL_MODE",
                                   "_M_AAMD64",
                                   "_M_ALPHA",
                                   "_M_AMD64",
                                   "_MANAGED",
                                   "_M_ARM",
                                   "_M_ARM64",
                                   "_M_ARM_ARMV7VE",
                                   "_M_ARM_FP",
                                   "_M_ARM_NT",
                                   "_M_ARMT",
                                   "_M_CEE",
                                   "_M_CEE_PURE",
                                   "_M_CEE_SAFE",
                                   "_MFC_VER",
                                   "_M_FP_EXCEPT",
                                   "_M_FP_FAST",
                                   "_M_FP_PRECISE",
                                   "_M_FP_STRICT",
                                   "_M_IA64",
                                   "_M_IX86",
                                   "_M_IX86_FP",
                                   "_M_MPPC",
                                   "_M_MRX000",
                                   "_M_PPC",
                                   "_MSC_BUILD",
                                   "_MSC_EXTENSIONS",
                                   "_MSC_FULL_VER",
                                   "_MSC_VER",
                                   "_MSVC_LANG",
                                   "__MSVC_RUNTIME_CHECKS",
                                   "_MT",
                                   "_M_THUMB",
                                   "_M_X64",
                                   "_NATIVE_WCHAR_T_DEFINED",
                                   "_OPENMP",
                                   "_PREFAST_",
                                   "__STDC__",
                                   "__STDC_HOSTED__",
                                   "__STDCPP_THREADS__",
                                   "_VC_NODEFAULTLIB",
                                   "_WCHAR_T_DEFINED",
                                   "_WIN32",
                                   "_WIN32_WCE",
                                   "_WIN64",
                                   "_WINRT_DLL",
                                   "_Wp64",
                                   nullptr};
    QByteArray file = "#define __PPOUT__(x) V##x=x\n\n";
    for (int i = 0; macros[i] != nullptr; ++i)
        file += msvcCompilationDefine(macros[i]);
    file += "\nvoid main(){}\n\n";
    return file;
}

// Run MSVC 'cl' compiler to obtain #defines.
// This function must be thread-safe!
//
// Some notes regarding the used approach:
//
// It seems that there is no reliable way to get all the
// predefined macros for a cl invocation. The following two
// approaches are unfortunately limited since both lead to an
// incomplete list of actually predefined macros and come with
// other problems, too.
//
// 1) Maintain a list of predefined macros from the official
//    documentation (for MSVC2015, e.g. [1]). Feed cl with a
//    temporary file that queries the values of those macros.
//
//    Problems:
//     * Maintaining that list.
//     * The documentation is incomplete, we do not get all
//       predefined macros. E.g. the cl from MSVC2015, set up
//       with "vcvars.bat x86_arm", predefines among others
//       _M_ARMT, but that's not reflected in the
//       documentation.
//
// 2) Run cl with the undocumented options /B1 and /Bx, as
//    described in [2].
//
//    Note: With qmake from Qt >= 5.8 it's possible to print
//    the macros formatted as preprocessor code in an easy to
//    read/compare/diff way:
//
//      > cl /nologo /c /TC /B1 qmake NUL
//      > cl /nologo /c /TP /Bx qmake NUL
//
//    Problems:
//     * Using undocumented options.
//     * Resulting macros are incomplete.
//       For example, the nowadays default option /Zc:wchar_t
//       predefines _WCHAR_T_DEFINED, but this is not reflected
//       with this approach.
//
//       To work around this we would need extra cl invocations
//       to get the actual values of the missing macros
//       (approach 1).
//
// Currently we combine both approaches in this way:
//  * As base, maintain the list from the documentation and
//    update it once a new MSVC version is released.
//  * Enrich it with macros that we discover with approach 2
//    once a new MSVC version is released.
//  * Enrich it further with macros that are not covered with
//    the above points.
//
// TODO: Update the predefined macros for MSVC 2017 once the
//       page exists.
//
// [1] https://msdn.microsoft.com/en-us/library/b0084kay.aspx
// [2] http://stackoverflow.com/questions/3665537/how-to-find-out-cl-exes-built-in-macros
Macros MsvcToolChain::msvcPredefinedMacros(const QStringList &cxxflags,
                                           const Utils::Environment &env) const
{
    Macros predefinedMacros;

    QStringList toProcess;
    for (const QString &arg : cxxflags) {
        if (arg.startsWith(QLatin1String("/D"))) {
            const QString define = arg.mid(2);
            predefinedMacros.append(Macro::fromKeyValue(define));
        } else if (arg.startsWith(QLatin1String("/U"))) {
            predefinedMacros.append(
                {arg.mid(2).toLocal8Bit(), ProjectExplorer::MacroType::Undefine});
        } else {
            toProcess.append(arg);
        }
    }

    Utils::TempFileSaver saver(Utils::TemporaryDirectory::masterDirectoryPath()
                               + "/envtestXXXXXX.cpp");
    saver.write(msvcCompilationFile());
    if (!saver.finalize()) {
        qWarning("%s: %s", Q_FUNC_INFO, qPrintable(saver.errorString()));
        return predefinedMacros;
    }
    Utils::SynchronousProcess cpp;
    cpp.setEnvironment(env.toStringList());
    cpp.setWorkingDirectory(Utils::TemporaryDirectory::masterDirectoryPath());
    QStringList arguments;
    const Utils::FilePath binary = env.searchInPath(QLatin1String("cl.exe"));
    if (binary.isEmpty()) {
        qWarning("%s: The compiler binary cl.exe could not be found in the path.", Q_FUNC_INFO);
        return predefinedMacros;
    }

    if (language() == ProjectExplorer::Constants::C_LANGUAGE_ID)
        arguments << QLatin1String("/TC");
    arguments << toProcess << QLatin1String("/EP") << QDir::toNativeSeparators(saver.fileName());
    Utils::SynchronousProcessResponse response = cpp.runBlocking(binary.toString(), arguments);
    if (response.result != Utils::SynchronousProcessResponse::Finished || response.exitCode != 0)
        return predefinedMacros;

    const QStringList output = Utils::filtered(response.stdOut().split('\n'),
                                               [](const QString &s) { return s.startsWith('V'); });
    for (const QString &line : output)
        predefinedMacros.append(Macro::fromKeyValue(line.mid(1)));
    return predefinedMacros;
}

//
// We want to detect the language version based on the predefined macros.
// Unfortunately MSVC does not conform to standard when it comes to the predefined
// __cplusplus macro - it reports "199711L", even for newer language versions.
//
// However:
//   * For >= Visual Studio 2015 Update 3 predefines _MSVC_LANG which has the proper value
//     of __cplusplus.
//     See https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros?view=vs-2017
//   * For >= Visual Studio 2017 Version 15.7 __cplusplus is correct once /Zc:__cplusplus
//     is provided on the command line. Then __cplusplus == _MSVC_LANG.
//     See https://blogs.msdn.microsoft.com/vcblog/2018/04/09/msvc-now-correctly-reports-__cplusplus
//
// We rely on _MSVC_LANG if possible, otherwise on some hard coded language versions
// depending on _MSC_VER.
//
// For _MSV_VER values, see https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros?view=vs-2017.
//
Utils::LanguageVersion MsvcToolChain::msvcLanguageVersion(const QStringList & /*cxxflags*/,
                                                          const Core::Id &language,
                                                          const Macros &macros) const
{
    using Utils::LanguageVersion;

    int mscVer = -1;
    QByteArray msvcLang;
    for (const ProjectExplorer::Macro &macro : macros) {
        if (macro.key == "_MSVC_LANG")
            msvcLang = macro.value;
        if (macro.key == "_MSC_VER")
            mscVer = macro.value.toInt(nullptr);
    }
    QTC_CHECK(mscVer > 0);

    if (language == Constants::CXX_LANGUAGE_ID) {
        if (!msvcLang.isEmpty()) // >= Visual Studio 2015 Update 3
            return ToolChain::cxxLanguageVersion(msvcLang);
        if (mscVer >= 1800) // >= Visual Studio 2013 (12.0)
            return LanguageVersion::CXX14;
        if (mscVer >= 1600) // >= Visual Studio 2010 (10.0)
            return LanguageVersion::CXX11;
        return LanguageVersion::CXX98;
    } else if (language == Constants::C_LANGUAGE_ID) {
        if (mscVer >= 1910) // >= Visual Studio 2017 RTW (15.0)
            return LanguageVersion::C11;
        return LanguageVersion::C99;
    } else {
        QTC_CHECK(false && "Unexpected toolchain language, assuming latest C++ we support.");
        return LanguageVersion::LatestCxx;
    }
}

// Windows: Expand the delayed evaluation references returned by the
// SDK setup scripts: "PATH=!Path!;foo". Some values might expand
// to empty and should not be added
static QString winExpandDelayedEnvReferences(QString in, const Utils::Environment &env)
{
    const QChar exclamationMark = QLatin1Char('!');
    for (int pos = 0; pos < in.size();) {
        // Replace "!REF!" by its value in process environment
        pos = in.indexOf(exclamationMark, pos);
        if (pos == -1)
            break;
        const int nextPos = in.indexOf(exclamationMark, pos + 1);
        if (nextPos == -1)
            break;
        const QString var = in.mid(pos + 1, nextPos - pos - 1);
        const QString replacement = env.value(var.toUpper());
        in.replace(pos, nextPos + 1 - pos, replacement);
        pos += replacement.size();
    }
    return in;
}

void MsvcToolChain::environmentModifications(
    QFutureInterface<MsvcToolChain::GenerateEnvResult> &future,
    QString vcvarsBat,
    QString varsBatArg)
{
    const Utils::Environment inEnv = Utils::Environment::systemEnvironment();
    Utils::Environment outEnv;
    QMap<QString, QString> envPairs;
    QList<Utils::EnvironmentItem> diff;
    Utils::optional<QString> error = generateEnvironmentSettings(inEnv,
                                                                 vcvarsBat,
                                                                 varsBatArg,
                                                                 envPairs);
    if (!error) {
        // Now loop through and process them
        for (auto envIter = envPairs.cbegin(), end = envPairs.cend(); envIter != end; ++envIter) {
            const QString expandedValue = winExpandDelayedEnvReferences(envIter.value(), inEnv);
            if (!expandedValue.isEmpty())
                outEnv.set(envIter.key(), expandedValue);
        }

        if (debug) {
            const QStringList newVars = outEnv.toStringList();
            const QStringList oldVars = inEnv.toStringList();
            QDebug nsp = qDebug().nospace();
            foreach (const QString &n, newVars) {
                if (!oldVars.contains(n))
                    nsp << n << '\n';
            }
        }

        diff = inEnv.diff(outEnv, true);
        for (int i = diff.size() - 1; i >= 0; --i) {
            if (diff.at(i).name.startsWith(QLatin1Char('='))) { // Exclude "=C:", "=EXITCODE"
                diff.removeAt(i);
            }
        }
    }

    future.reportResult({error, diff});
}

void MsvcToolChain::initEnvModWatcher(const QFuture<GenerateEnvResult> &future)
{
    QObject::connect(&m_envModWatcher, &QFutureWatcher<GenerateEnvResult>::resultReadyAt, [&]() {
        const GenerateEnvResult &result = m_envModWatcher.result();
        if (result.error) {
            const QString &errorMessage = *result.error;
            if (!errorMessage.isEmpty())
                TaskHub::addTask(Task::Error, errorMessage, Constants::TASK_CATEGORY_COMPILE);
        } else {
            updateEnvironmentModifications(result.environmentItems);
        }
    });
    m_envModWatcher.setFuture(future);
}

void MsvcToolChain::updateEnvironmentModifications(QList<Utils::EnvironmentItem> modifications)
{
    Utils::EnvironmentItem::sort(&modifications);
    if (modifications != m_environmentModifications) {
        m_environmentModifications = modifications;
        rescanForCompiler();
        toolChainUpdated();
    }
}

void MsvcToolChain::detectInstalledAbis()
{
    static QMap<QString, Abis> abiCache;
    const QString vcVarsBase
            = QDir::fromNativeSeparators(m_vcvarsBat).left(m_vcvarsBat.lastIndexOf('/'));
    if (abiCache.contains(vcVarsBase)) {
        m_supportedAbis = abiCache.value(vcVarsBase);
    } else {
        // Clear previously detected m_supportedAbis to repopulate it.
        m_supportedAbis.clear();
        const Abi baseAbi = targetAbi();
        for (MsvcPlatform platform : platforms) {
            bool toolchainInstalled = false;
            QString perhapsVcVarsPath = vcVarsBase + QLatin1Char('/') + QLatin1String(platform.bat);
            const Platform p = platform.platform;
            if (QFileInfo(perhapsVcVarsPath).isFile()) {
                toolchainInstalled = true;
            } else {
                // MSVC 2015 and below had various versions of vcvars scripts in subfolders. Try these
                // as fallbacks.
                perhapsVcVarsPath = vcVarsBase + platform.prefix + QLatin1Char('/')
                                    + QLatin1String(platform.bat);
                toolchainInstalled = QFileInfo(perhapsVcVarsPath).isFile();
            }
            if (hostSupportsPlatform(platform.platform) && toolchainInstalled) {
                Abi newAbi(archForPlatform(p),
                           baseAbi.os(),
                           baseAbi.osFlavor(),
                           baseAbi.binaryFormat(),
                           wordWidthForPlatform(p));
                if (!m_supportedAbis.contains(newAbi))
                    m_supportedAbis.append(newAbi);
            }
        }

        abiCache.insert(vcVarsBase, m_supportedAbis);
    }

    // Always add targetAbi in supportedAbis if it is empty.
    // targetAbi is the abi with which the toolchain was detected.
    // This is necessary for toolchains that don't have vcvars32.bat and the like in their
    // vcVarsBase path, like msvc2010.
    // Also, don't include that one in abiCache to avoid polluting it with values specific
    // to one toolchain as the cache is global for a vcVarsBase path. For this reason, the
    // targetAbi needs to be added manually.
    if (m_supportedAbis.empty())
        m_supportedAbis.append(targetAbi());
}

Utils::Environment MsvcToolChain::readEnvironmentSetting(const Utils::Environment &env) const
{
    Utils::Environment resultEnv = env;
    if (m_environmentModifications.isEmpty()) {
        m_envModWatcher.waitForFinished();
        if (m_envModWatcher.future().isFinished() && !m_envModWatcher.future().isCanceled()) {
            const GenerateEnvResult &result = m_envModWatcher.result();
            if (result.error) {
                const QString &errorMessage = *result.error;
                if (!errorMessage.isEmpty())
                    TaskHub::addTask(Task::Error, errorMessage, Constants::TASK_CATEGORY_COMPILE);
            } else {
                resultEnv.modify(result.environmentItems);
            }
        }
    } else {
        resultEnv.modify(m_environmentModifications);
    }
    return resultEnv;
}

// --------------------------------------------------------------------------
// MsvcToolChain
// --------------------------------------------------------------------------

MsvcToolChain::MsvcToolChain(const QString &name,
                             const Abi &abi,
                             const QString &varsBat,
                             const QString &varsBatArg)
    : MsvcToolChain(Constants::MSVC_TOOLCHAIN_TYPEID, name, abi, varsBat, varsBatArg)
{}

static void addToAvailableMsvcToolchains(const MsvcToolChain *toolchain)
{
    if (toolchain->typeId() != Constants::MSVC_TOOLCHAIN_TYPEID)
        return;

    if (!g_availableMsvcToolchains.contains(toolchain))
        g_availableMsvcToolchains.push_back(toolchain);
}

MsvcToolChain::MsvcToolChain(Core::Id typeId,
                             const QString &name,
                             const Abi &abi,
                             const QString &varsBat,
                             const QString &varsBatArg)
    : ToolChain(typeId)
    , m_headerPathsMutex(new QMutex)
    , m_lastEnvironment(Utils::Environment::systemEnvironment())
    , m_abi(abi)
    , m_vcvarsBat(varsBat)
    , m_varsBatArg(varsBatArg)
{
    detectInstalledAbis();
    addToAvailableMsvcToolchains(this);

    initEnvModWatcher(Utils::runAsync(envModThreadPool(),
                                      &MsvcToolChain::environmentModifications,
                                      varsBat,
                                      varsBatArg));

    Q_ASSERT(!name.isEmpty());

    setDisplayName(name);
}

MsvcToolChain::MsvcToolChain(Core::Id typeId)
    : ToolChain(typeId)
{}

void MsvcToolChain::inferWarningsForLevel(int warningLevel, WarningFlags &flags)
{
    // reset all except unrelated flag
    flags = flags & WarningFlags::AsErrors;

    if (warningLevel >= 1)
        flags |= WarningFlags(WarningFlags::Default | WarningFlags::IgnoredQualfiers
                              | WarningFlags::HiddenLocals | WarningFlags::UnknownPragma);
    if (warningLevel >= 2)
        flags |= WarningFlags::All;
    if (warningLevel >= 3) {
        flags |= WarningFlags(WarningFlags::Extra | WarningFlags::NonVirtualDestructor
                              | WarningFlags::SignedComparison | WarningFlags::UnusedLocals
                              | WarningFlags::Deprecated);
    }
    if (warningLevel >= 4)
        flags |= WarningFlags::UnusedParams;
}

MsvcToolChain::MsvcToolChain()
    : MsvcToolChain(Constants::MSVC_TOOLCHAIN_TYPEID)
{}

MsvcToolChain::~MsvcToolChain()
{
    g_availableMsvcToolchains.removeOne(this);
    delete m_headerPathsMutex;
}

Abi MsvcToolChain::targetAbi() const
{
    return m_abi;
}

Abis MsvcToolChain::supportedAbis() const
{
    return m_supportedAbis;
}

void MsvcToolChain::setTargetAbi(const Abi &abi)
{
    if (m_abi == abi)
        return;

    m_abi = abi;
}

bool MsvcToolChain::isValid() const
{
    if (m_vcvarsBat.isEmpty())
        return false;
    QFileInfo fi(m_vcvarsBat);
    return fi.isFile() && fi.isExecutable();
}

QString MsvcToolChain::originalTargetTriple() const
{
    return m_abi.wordWidth() == 64 ? QLatin1String("x86_64-pc-windows-msvc")
                                   : QLatin1String("i686-pc-windows-msvc");
}

QString MsvcToolChain::typeDisplayName() const
{
    return MsvcToolChainFactory::tr("MSVC");
}

QStringList MsvcToolChain::suggestedMkspecList() const
{
    QStringList result = {"win32-msvc"}; // Common MSVC mkspec introduced in 5.8.1
    switch (m_abi.osFlavor()) {
    case Abi::WindowsMsvc2005Flavor:
        result << "win32-msvc2005";
        break;
    case Abi::WindowsMsvc2008Flavor:
        result << "win32-msvc2008";
        break;
    case Abi::WindowsMsvc2010Flavor:
        result << "win32-msvc2010";
        break;
    case Abi::WindowsMsvc2012Flavor:
        result << "win32-msvc2012"
               << "win32-msvc2010";
        break;
    case Abi::WindowsMsvc2013Flavor:
        result << "win32-msvc2013"
               << "winphone-arm-msvc2013"
               << "winphone-x86-msvc2013"
               << "winrt-arm-msvc2013"
               << "winrt-x86-msvc2013"
               << "winrt-x64-msvc2013"
               << "win32-msvc2012"
               << "win32-msvc2010";
        break;
    case Abi::WindowsMsvc2015Flavor:
        result << "win32-msvc2015"
               << "winphone-arm-msvc2015"
               << "winphone-x86-msvc2015"
               << "winrt-arm-msvc2015"
               << "winrt-x86-msvc2015"
               << "winrt-x64-msvc2015";
        break;
    case Abi::WindowsMsvc2017Flavor:
        result << "win32-msvc2017"
               << "winrt-arm-msvc2017"
               << "winrt-x86-msvc2017"
               << "winrt-x64-msvc2017";
        break;
    case Abi::WindowsMsvc2019Flavor:
        result << "win32-msvc2019"
               << "winrt-arm-msvc2019"
               << "winrt-x86-msvc2019"
               << "winrt-x64-msvc2019";
        break;
    default:
        result.clear();
        break;
    }
    return result;
}

QVariantMap MsvcToolChain::toMap() const
{
    QVariantMap data = ToolChain::toMap();
    data.insert(QLatin1String(varsBatKeyC), m_vcvarsBat);
    if (!m_varsBatArg.isEmpty())
        data.insert(QLatin1String(varsBatArgKeyC), m_varsBatArg);
    data.insert(QLatin1String(supportedAbiKeyC), m_abi.toString());
    data.insert(supportedAbisKeyC, Utils::transform<QStringList>(m_supportedAbis, &Abi::toString));
    Utils::EnvironmentItem::sort(&m_environmentModifications);
    data.insert(QLatin1String(environModsKeyC),
                Utils::EnvironmentItem::toVariantList(m_environmentModifications));
    return data;
}

bool MsvcToolChain::fromMap(const QVariantMap &data)
{
    if (!ToolChain::fromMap(data))
        return false;
    m_vcvarsBat = QDir::fromNativeSeparators(data.value(QLatin1String(varsBatKeyC)).toString());
    m_varsBatArg = data.value(QLatin1String(varsBatArgKeyC)).toString();

    const QString abiString = data.value(QLatin1String(supportedAbiKeyC)).toString();
    m_abi = Abi::fromString(abiString);
    const QStringList abiList = data.value(supportedAbisKeyC).toStringList();
    m_supportedAbis.clear();
    for (const QString &a : abiList) {
        Abi abi = Abi::fromString(a);
        if (!abi.isValid())
            continue;
        m_supportedAbis.append(abi);
    }
    m_environmentModifications = Utils::EnvironmentItem::itemsFromVariantList(
        data.value(QLatin1String(environModsKeyC)).toList());
    rescanForCompiler();

    initEnvModWatcher(Utils::runAsync(envModThreadPool(),
                                      &MsvcToolChain::environmentModifications,
                                      m_vcvarsBat,
                                      m_varsBatArg));

    // supported Abis were not stored in the map in previous versions of the settings. Re-detect
    if (m_supportedAbis.isEmpty())
        detectInstalledAbis();

    const bool valid = !m_vcvarsBat.isEmpty() && m_abi.isValid() && !m_supportedAbis.isEmpty();
    if (valid)
        addToAvailableMsvcToolchains(this);

    return valid;
}

std::unique_ptr<ToolChainConfigWidget> MsvcToolChain::createConfigurationWidget()
{
    return std::make_unique<MsvcToolChainConfigWidget>(this);
}

bool static hasFlagEffectOnMacros(const QString &flag)
{
    if (flag.startsWith("-") || flag.startsWith("/")) {
        const QString f = flag.mid(1);
        if (f.startsWith("I"))
            return false; // Skip include paths
        if (f.startsWith("w", Qt::CaseInsensitive))
            return false; // Skip warning options
        if (f.startsWith("Y") || (f.startsWith("F") && f != "F"))
            return false; // Skip pch-related flags
    }
    return true;
}

ToolChain::MacroInspectionRunner MsvcToolChain::createMacroInspectionRunner() const
{
    Utils::Environment env(m_lastEnvironment);
    addToEnvironment(env);
    MacrosCache macroCache = predefinedMacrosCache();
    const Core::Id lang = language();

    // This runner must be thread-safe!
    return [this, env, macroCache, lang](const QStringList &cxxflags) {
        const QStringList filteredFlags = Utils::filtered(cxxflags, [](const QString &arg) {
            return hasFlagEffectOnMacros(arg);
        });

        const Utils::optional<MacroInspectionReport> cachedMacros = macroCache->check(filteredFlags);
        if (cachedMacros)
            return cachedMacros.value();

        const Macros macros = msvcPredefinedMacros(filteredFlags, env);

        const auto report = MacroInspectionReport{macros,
                                                  msvcLanguageVersion(filteredFlags, lang, macros)};
        macroCache->insert(filteredFlags, report);

        return report;
    };
}

Macros MsvcToolChain::predefinedMacros(const QStringList &cxxflags) const
{
    return createMacroInspectionRunner()(cxxflags).macros;
}

Utils::LanguageExtensions MsvcToolChain::languageExtensions(const QStringList &cxxflags) const
{
    using Utils::LanguageExtension;
    Utils::LanguageExtensions extensions(LanguageExtension::Microsoft);
    if (cxxflags.contains(QLatin1String("/openmp")))
        extensions |= LanguageExtension::OpenMP;

    // see http://msdn.microsoft.com/en-us/library/0k0w269d%28v=vs.71%29.aspx
    if (cxxflags.contains(QLatin1String("/Za")))
        extensions &= ~Utils::LanguageExtensions(LanguageExtension::Microsoft);

    return extensions;
}

WarningFlags MsvcToolChain::warningFlags(const QStringList &cflags) const
{
    WarningFlags flags = WarningFlags::NoWarnings;
    foreach (QString flag, cflags) {
        if (!flag.isEmpty() && flag[0] == QLatin1Char('-'))
            flag[0] = QLatin1Char('/');

        if (flag == QLatin1String("/WX")) {
            flags |= WarningFlags::AsErrors;
        } else if (flag == QLatin1String("/W0") || flag == QLatin1String("/w")) {
            inferWarningsForLevel(0, flags);
        } else if (flag == QLatin1String("/W1")) {
            inferWarningsForLevel(1, flags);
        } else if (flag == QLatin1String("/W2")) {
            inferWarningsForLevel(2, flags);
        } else if (flag == QLatin1String("/W3") || flag == QLatin1String("/W4")
                   || flag == QLatin1String("/Wall")) {
            inferWarningsForLevel(3, flags);
        }

        WarningFlagAdder add(flag, flags);
        if (add.triggered())
            continue;
        // http://msdn.microsoft.com/en-us/library/ay4h0tc9.aspx
        add(4263, WarningFlags::OverloadedVirtual);
        // http://msdn.microsoft.com/en-us/library/ytxde1x7.aspx
        add(4230, WarningFlags::IgnoredQualfiers);
        // not exact match, http://msdn.microsoft.com/en-us/library/0hx5ckb0.aspx
        add(4258, WarningFlags::HiddenLocals);
        // http://msdn.microsoft.com/en-us/library/wzxffy8c.aspx
        add(4265, WarningFlags::NonVirtualDestructor);
        // http://msdn.microsoft.com/en-us/library/y92ktdf2%28v=vs.90%29.aspx
        add(4018, WarningFlags::SignedComparison);
        // http://msdn.microsoft.com/en-us/library/w099eeey%28v=vs.90%29.aspx
        add(4068, WarningFlags::UnknownPragma);
        // http://msdn.microsoft.com/en-us/library/26kb9fy0%28v=vs.80%29.aspx
        add(4100, WarningFlags::UnusedParams);
        // http://msdn.microsoft.com/en-us/library/c733d5h9%28v=vs.90%29.aspx
        add(4101, WarningFlags::UnusedLocals);
        // http://msdn.microsoft.com/en-us/library/xb1db44s%28v=vs.90%29.aspx
        add(4189, WarningFlags::UnusedLocals);
        // http://msdn.microsoft.com/en-us/library/ttcz0bys%28v=vs.90%29.aspx
        add(4996, WarningFlags::Deprecated);
    }
    return flags;
}

ToolChain::BuiltInHeaderPathsRunner MsvcToolChain::createBuiltInHeaderPathsRunner() const
{
    Utils::Environment env(m_lastEnvironment);
    addToEnvironment(env);

    return [this, env](const QStringList &, const QString &, const QString &) {
        QMutexLocker locker(m_headerPathsMutex);
        if (m_headerPaths.isEmpty()) {
            foreach (const QString &path,
                     env.value(QLatin1String("INCLUDE")).split(QLatin1Char(';'))) {
                m_headerPaths.append({path, HeaderPathType::BuiltIn});
            }
        }
        return m_headerPaths;
    };
}

HeaderPaths MsvcToolChain::builtInHeaderPaths(const QStringList &cxxflags,
                                              const Utils::FilePath &sysRoot) const
{
    return createBuiltInHeaderPathsRunner()(cxxflags, sysRoot.toString(), "");
}

void MsvcToolChain::addToEnvironment(Utils::Environment &env) const
{
    // We cache the full environment (incoming + modifications by setup script).
    if (!m_resultEnvironment.size() || env != m_lastEnvironment) {
        if (debug)
            qDebug() << "addToEnvironment: " << displayName();
        m_lastEnvironment = env;
        m_resultEnvironment = readEnvironmentSetting(env);
    }
    env = m_resultEnvironment;
}

static QString wrappedMakeCommand(const QString &command)
{
    const QString wrapperPath = QDir::currentPath() + "/msvc_make.bat";
    QFile wrapper(wrapperPath);
    if (!wrapper.open(QIODevice::WriteOnly))
        return command;
    QTextStream stream(&wrapper);
    stream << "chcp 65001\n";
    stream << command << " %*";

    return wrapperPath;
}

FilePath MsvcToolChain::makeCommand(const Environment &environment) const
{
    bool useJom = ProjectExplorerPlugin::projectExplorerSettings().useJom;
    const QString jom("jom.exe");
    const QString nmake("nmake.exe");
    Utils::FilePath tmp;

    FilePath command;
    if (useJom) {
        tmp = environment.searchInPath(jom,
                                       {Utils::FilePath::fromString(
                                           QCoreApplication::applicationDirPath())});
        if (!tmp.isEmpty())
            command = tmp;
    }

    if (command.isEmpty()) {
        tmp = environment.searchInPath(nmake);
        if (!tmp.isEmpty())
            command = tmp;
    }

    if (command.isEmpty())
        command = FilePath::fromString(useJom ? jom : nmake);

    if (environment.hasKey("VSLANG"))
        return FilePath::fromString(wrappedMakeCommand(command.toString()));

    return command;
}

Utils::FilePath MsvcToolChain::compilerCommand() const
{
    return m_compilerCommand;
}

void MsvcToolChain::rescanForCompiler()
{
    Utils::Environment env = Utils::Environment::systemEnvironment();
    addToEnvironment(env);

    m_compilerCommand
        = env.searchInPath(QLatin1String("cl.exe"), {}, [](const Utils::FilePath &name) {
              QDir dir(QDir::cleanPath(name.toFileInfo().absolutePath() + QStringLiteral("/..")));
              do {
                  if (QFile::exists(dir.absoluteFilePath(QStringLiteral("vcvarsall.bat")))
                      || QFile::exists(dir.absolutePath() + "/Auxiliary/Build/vcvarsall.bat"))
                      return true;
              } while (dir.cdUp() && !dir.isRoot());
              return false;
          });
}

IOutputParser *MsvcToolChain::outputParser() const
{
    return new MsvcParser;
}

void MsvcToolChain::changeVcVarsCall(const QString &varsBat, const QString &varsBatArg)
{
    m_vcvarsBat = varsBat;
    m_varsBatArg = varsBatArg;

    if (!varsBat.isEmpty()) {
        detectInstalledAbis();
        initEnvModWatcher(Utils::runAsync(envModThreadPool(),
                                          &ClangClToolChain::environmentModifications,
                                          m_vcvarsBat,
                                          m_varsBatArg));
    }
}

// --------------------------------------------------------------------------
// MsvcBasedToolChainConfigWidget: Creates a simple GUI without error label
// to display name and varsBat. Derived classes should add the error label and
// call setFromMsvcToolChain().
// --------------------------------------------------------------------------

MsvcBasedToolChainConfigWidget::MsvcBasedToolChainConfigWidget(ToolChain *tc)
    : ToolChainConfigWidget(tc)
    , m_nameDisplayLabel(new QLabel(this))
    , m_varsBatDisplayLabel(new QLabel(this))
{
    m_nameDisplayLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);
    m_mainLayout->addRow(m_nameDisplayLabel);
    m_varsBatDisplayLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);
    m_mainLayout->addRow(tr("Initialization:"), m_varsBatDisplayLabel);
}

static QString msvcVarsToDisplay(const MsvcToolChain &tc)
{
    QString varsBatDisplay = QDir::toNativeSeparators(tc.varsBat());
    if (!tc.varsBatArg().isEmpty()) {
        varsBatDisplay += QLatin1Char(' ');
        varsBatDisplay += tc.varsBatArg();
    }
    return varsBatDisplay;
}

void MsvcBasedToolChainConfigWidget::setFromMsvcToolChain()
{
    const auto *tc = static_cast<const MsvcToolChain *>(toolChain());
    QTC_ASSERT(tc, return );
    m_nameDisplayLabel->setText(tc->displayName());
    m_varsBatDisplayLabel->setText(msvcVarsToDisplay(*tc));
}

// --------------------------------------------------------------------------
// MsvcToolChainConfigWidget
// --------------------------------------------------------------------------

MsvcToolChainConfigWidget::MsvcToolChainConfigWidget(ToolChain *tc)
    : MsvcBasedToolChainConfigWidget(tc)
    , m_varsBatPathCombo(new QComboBox(this))
    , m_varsBatArchCombo(new QComboBox(this))
    , m_varsBatArgumentsEdit(new QLineEdit(this))
    , m_abiWidget(new AbiWidget)
{
    m_mainLayout->removeRow(m_mainLayout->rowCount() - 1);

    QHBoxLayout *hLayout = new QHBoxLayout();
    m_varsBatPathCombo->setObjectName("varsBatCombo");
    m_varsBatPathCombo->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Fixed);
    m_varsBatPathCombo->setEditable(true);
    for (const MsvcToolChain *tmpTc : g_availableMsvcToolchains) {
        const QString nativeVcVars = QDir::toNativeSeparators(tmpTc->varsBat());
        if (!tmpTc->varsBat().isEmpty()
                && m_varsBatPathCombo->findText(nativeVcVars) == -1) {
            m_varsBatPathCombo->addItem(nativeVcVars);
        }
    }
    const bool isAmd64
            = Utils::HostOsInfo::hostArchitecture() == Utils::HostOsInfo::HostArchitectureAMD64;
     // TODO: Add missing values to MsvcToolChain::Platform
    m_varsBatArchCombo->addItem(tr("<empty>"), isAmd64 ? MsvcToolChain::amd64 : MsvcToolChain::x86);
    m_varsBatArchCombo->addItem("x86", MsvcToolChain::x86);
    m_varsBatArchCombo->addItem("amd64", MsvcToolChain::amd64);
    m_varsBatArchCombo->addItem("arm", MsvcToolChain::arm);
    m_varsBatArchCombo->addItem("x86_amd64", MsvcToolChain::x86_amd64);
    m_varsBatArchCombo->addItem("x86_arm", MsvcToolChain::x86_arm);
//    m_varsBatArchCombo->addItem("x86_arm64", MsvcToolChain::x86_arm64);
    m_varsBatArchCombo->addItem("amd64_x86", MsvcToolChain::amd64_x86);
    m_varsBatArchCombo->addItem("amd64_arm", MsvcToolChain::amd64_arm);
//    m_varsBatArchCombo->addItem("amd64_arm64", MsvcToolChain::amd64_arm64);
    m_varsBatArchCombo->addItem("ia64", MsvcToolChain::ia64);
    m_varsBatArchCombo->addItem("x86_ia64", MsvcToolChain::x86_ia64);
    m_varsBatArgumentsEdit->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Fixed);
    m_varsBatArgumentsEdit->setToolTip(tr("Additional arguments for the vcvarsall.bat call"));
    hLayout->addWidget(m_varsBatPathCombo);
    hLayout->addWidget(m_varsBatArchCombo);
    hLayout->addWidget(m_varsBatArgumentsEdit);
    m_mainLayout->addRow(tr("Initialization:"), hLayout);
    m_mainLayout->addRow(tr("&ABI:"), m_abiWidget);
    addErrorLabel();
    setFromMsvcToolChain();

    connect(m_varsBatPathCombo, &QComboBox::currentTextChanged,
            this, &MsvcToolChainConfigWidget::handleVcVarsChange);
    connect(m_varsBatArchCombo, &QComboBox::currentTextChanged,
            this, &MsvcToolChainConfigWidget::handleVcVarsArchChange);
    connect(m_varsBatArgumentsEdit, &QLineEdit::textChanged,
            this, &ToolChainConfigWidget::dirty);
    connect(m_abiWidget, &AbiWidget::abiChanged, this, &ToolChainConfigWidget::dirty);
}

void MsvcToolChainConfigWidget::applyImpl()
{
    auto *tc = static_cast<MsvcToolChain *>(toolChain());
    QTC_ASSERT(tc, return );
    tc->setTargetAbi(m_abiWidget->currentAbi());
    const QString vcVars = QDir::fromNativeSeparators(m_varsBatPathCombo->currentText());
    tc->changeVcVarsCall(vcVars, vcVarsArguments());
    setFromMsvcToolChain();
}

void MsvcToolChainConfigWidget::discardImpl()
{
    setFromMsvcToolChain();
}

bool MsvcToolChainConfigWidget::isDirtyImpl() const
{
    auto msvcToolChain = static_cast<MsvcToolChain *>(toolChain());

    return msvcToolChain->varsBat() != QDir::fromNativeSeparators(m_varsBatPathCombo->currentText())
            || msvcToolChain->varsBatArg() != vcVarsArguments()
            || msvcToolChain->targetAbi() != m_abiWidget->currentAbi();
}

void MsvcToolChainConfigWidget::makeReadOnlyImpl()
{
    m_varsBatPathCombo->setEnabled(false);
    m_varsBatArchCombo->setEnabled(false);
    m_varsBatArgumentsEdit->setEnabled(false);
    m_abiWidget->setEnabled(false);
}

void MsvcToolChainConfigWidget::setFromMsvcToolChain()
{
    const auto *tc = static_cast<const MsvcToolChain *>(toolChain());
    QTC_ASSERT(tc, return );
    m_nameDisplayLabel->setText(tc->displayName());
    QString args = tc->varsBatArg();
    QStringList argList = args.split(' ');
    for (int i = 0; i < argList.count(); ++i) {
        if (m_varsBatArchCombo->findText(argList.at(i).trimmed()) != -1) {
            const QString arch = argList.takeAt(i);
            m_varsBatArchCombo->setCurrentText(arch);
            args = argList.join(QLatin1Char(' '));
            break;
        }
    }
    m_varsBatPathCombo->setCurrentText(QDir::toNativeSeparators(tc->varsBat()));
    m_varsBatArgumentsEdit->setText(args);
    m_abiWidget->setAbis(tc->supportedAbis(), tc->targetAbi());
}

void MsvcToolChainConfigWidget::handleVcVarsChange(const QString &vcVars)
{
    const QString normalizedVcVars = QDir::fromNativeSeparators(vcVars);
    const auto *currentTc = static_cast<const MsvcToolChain *>(toolChain());
    QTC_ASSERT(currentTc, return );
    const MsvcToolChain::Platform platform = m_varsBatArchCombo->currentData().value<MsvcToolChain::Platform>();
    const Abi::Architecture arch = archForPlatform(platform);
    const unsigned char wordWidth = wordWidthForPlatform(platform);

    for (const MsvcToolChain *tc : g_availableMsvcToolchains) {
        if (tc->varsBat() == normalizedVcVars && tc->targetAbi().wordWidth() == wordWidth
                && tc->targetAbi().architecture() == arch) {
            m_abiWidget->setAbis(tc->supportedAbis(), tc->targetAbi());
            break;
        }
    }
    emit dirty();
}

void MsvcToolChainConfigWidget::handleVcVarsArchChange(const QString &)
{
    Abi currentAbi = m_abiWidget->currentAbi();
    const MsvcToolChain::Platform platform = m_varsBatArchCombo->currentData().value<MsvcToolChain::Platform>();
    Abi newAbi(archForPlatform(platform), currentAbi.os(), currentAbi.osFlavor(),
               currentAbi.binaryFormat(), wordWidthForPlatform(platform));
    if (currentAbi != newAbi)
        m_abiWidget->setAbis(m_abiWidget->supportedAbis(), newAbi);
    emit dirty();
}

QString MsvcToolChainConfigWidget::vcVarsArguments() const
{
    QString varsBatArg
            = m_varsBatArchCombo->currentText() == tr("<empty>")
            ? "" : m_varsBatArchCombo->currentText();
    if (!m_varsBatArgumentsEdit->text().isEmpty())
        varsBatArg += QLatin1Char(' ') + m_varsBatArgumentsEdit->text();
    return varsBatArg;
}

// --------------------------------------------------------------------------
// ClangClToolChainConfigWidget
// --------------------------------------------------------------------------

ClangClToolChainConfigWidget::ClangClToolChainConfigWidget(ToolChain *tc) :
    MsvcBasedToolChainConfigWidget(tc),
    m_varsBatDisplayCombo(new QComboBox(this))
{
    m_mainLayout->removeRow(m_mainLayout->rowCount() - 1);

    m_varsBatDisplayCombo->setObjectName("varsBatCombo");
    m_varsBatDisplayCombo->setSizeAdjustPolicy(QComboBox::AdjustToContents);
    m_mainLayout->addRow(tr("Initialization:"), m_varsBatDisplayCombo);

    if (tc->isAutoDetected()) {
        m_llvmDirLabel = new QLabel(this);
        m_llvmDirLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);
        m_mainLayout->addRow(tr("&Compiler path:"), m_llvmDirLabel);
    } else {
        const QStringList gnuVersionArgs = QStringList("--version");
        m_compilerCommand = new Utils::PathChooser(this);
        m_compilerCommand->setExpectedKind(Utils::PathChooser::ExistingCommand);
        m_compilerCommand->setCommandVersionArguments(gnuVersionArgs);
        m_compilerCommand->setHistoryCompleter("PE.Clang.Command.History");
        m_mainLayout->addRow(tr("&Compiler path:"), m_compilerCommand);
    }
    addErrorLabel();
    setFromClangClToolChain();

    if (m_compilerCommand) {
        connect(m_compilerCommand,
                &Utils::PathChooser::rawPathChanged,
                this,
                &ClangClToolChainConfigWidget::dirty);
    }
}

void ClangClToolChainConfigWidget::setFromClangClToolChain()
{
    const auto *currentTC = static_cast<const MsvcToolChain *>(toolChain());
    m_nameDisplayLabel->setText(currentTC->displayName());
    m_varsBatDisplayCombo->clear();
    m_varsBatDisplayCombo->addItem(msvcVarsToDisplay(*currentTC));
    for (const MsvcToolChain *tc : g_availableMsvcToolchains) {
        const QString varsToDisplay = msvcVarsToDisplay(*tc);
        if (m_varsBatDisplayCombo->findText(varsToDisplay) == -1)
            m_varsBatDisplayCombo->addItem(varsToDisplay);
    }

    const auto *clangClToolChain = static_cast<const ClangClToolChain *>(toolChain());
    if (clangClToolChain->isAutoDetected())
        m_llvmDirLabel->setText(QDir::toNativeSeparators(clangClToolChain->clangPath()));
    else
        m_compilerCommand->setFileName(Utils::FilePath::fromString(clangClToolChain->clangPath()));
}

static const MsvcToolChain *findMsvcToolChain(unsigned char wordWidth, Abi::OSFlavor flavor)
{
    return Utils::findOrDefault(g_availableMsvcToolchains,
                                [wordWidth, flavor](const MsvcToolChain *tc) {
                                    const Abi abi = tc->targetAbi();
                                    return abi.osFlavor() == flavor && wordWidth == abi.wordWidth();
                                });
}

static const MsvcToolChain *findMsvcToolChain(const QString &displayedVarsBat)
{
    return Utils::findOrDefault(g_availableMsvcToolchains,
                                [&displayedVarsBat] (const MsvcToolChain *tc) {
                                    return msvcVarsToDisplay(*tc) == displayedVarsBat;
                                });
}

static QVersionNumber clangClVersion(const QString &clangClPath)
{
    Utils::SynchronousProcess clangClProcess;
    const Utils::SynchronousProcessResponse response
        = clangClProcess.runBlocking(clangClPath, {QStringLiteral("--version")});
    if (response.result != Utils::SynchronousProcessResponse::Finished || response.exitCode != 0)
        return {};
    const QRegularExpressionMatch match = QRegularExpression(
                                              QStringLiteral("clang version (\\d+(\\.\\d+)+)"))
                                              .match(response.stdOut());
    if (!match.hasMatch())
        return {};
    return QVersionNumber::fromString(match.captured(1));
}

static const MsvcToolChain *selectMsvcToolChain(const QString &displayedVarsBat,
                                                const QString &clangClPath,
                                                unsigned char wordWidth)
{
    const MsvcToolChain *toolChain = nullptr;
    if (!displayedVarsBat.isEmpty()) {
        toolChain = findMsvcToolChain(displayedVarsBat);
        if (toolChain)
            return toolChain;
    }

    QTC_CHECK(displayedVarsBat.isEmpty());
    const QVersionNumber version = clangClVersion(clangClPath);
    if (version.majorVersion() >= 6)
        toolChain = findMsvcToolChain(wordWidth, Abi::WindowsMsvc2017Flavor);
    if (!toolChain) {
        toolChain = findMsvcToolChain(wordWidth, Abi::WindowsMsvc2015Flavor);
        if (!toolChain)
            toolChain = findMsvcToolChain(wordWidth, Abi::WindowsMsvc2013Flavor);
    }
    return toolChain;
}

static QList<ToolChain *> detectClangClToolChainInPath(const QString &clangClPath,
                                                       const QList<ToolChain *> &alreadyKnown,
                                                       const QString &displayedVarsBat,
                                                       bool isDefault = false)
{
    QList<ToolChain *> res;
    const unsigned char wordWidth = Utils::is64BitWindowsBinary(clangClPath) ? 64 : 32;
    const MsvcToolChain *toolChain = selectMsvcToolChain(displayedVarsBat, clangClPath, wordWidth);

    if (!toolChain) {
        qWarning("Unable to find a suitable MSVC version for \"%s\".",
                 qPrintable(QDir::toNativeSeparators(clangClPath)));
        return res;
    }

    Utils::Environment systemEnvironment = Utils::Environment::systemEnvironment();
    const Abi targetAbi = toolChain->targetAbi();
    const QString name = QString("%1LLVM %2 bit based on %3")
                             .arg(QLatin1String(isDefault ? "Default " : ""))
                             .arg(wordWidth)
                             .arg(Abi::toString(targetAbi.osFlavor()).toUpper());
    for (auto language : {Constants::C_LANGUAGE_ID, Constants::CXX_LANGUAGE_ID}) {
        ClangClToolChain *tc = static_cast<ClangClToolChain *>(
            Utils::findOrDefault(alreadyKnown, [&](ToolChain *tc) -> bool {
                if (tc->typeId() != Constants::CLANG_CL_TOOLCHAIN_TYPEID)
                    return false;
                if (tc->targetAbi() != targetAbi)
                    return false;
                if (tc->language() != language)
                    return false;
                return systemEnvironment.isSameExecutable(tc->compilerCommand().toString(),
                                                          clangClPath);
            }));
        if (!tc) {
            tc = new ClangClToolChain(name, clangClPath);
            tc->setDetection(ToolChain::AutoDetection);
            tc->setLanguage(language);
            tc->resetMsvcToolChain(toolChain);
        }
        res << tc;
    }
    return res;
}

static QString compilerFromPath(const QString &path)
{
    return path + "/bin/clang-cl.exe";
}

void ClangClToolChainConfigWidget::applyImpl()
{
    Utils::FilePath clangClPath = m_compilerCommand->fileName();
    auto clangClToolChain = static_cast<ClangClToolChain *>(toolChain());
    clangClToolChain->setClangPath(clangClPath.toString());

    if (clangClPath.fileName() != "clang-cl.exe") {
        clangClToolChain->resetMsvcToolChain();
        setFromClangClToolChain();
        return;
    }

    const QString displayedVarsBat = m_varsBatDisplayCombo->currentText();
    QList<ToolChain *> results = detectClangClToolChainInPath(clangClPath.toString(),
                                                              {},
                                                              displayedVarsBat);

    if (results.isEmpty()) {
        clangClToolChain->resetMsvcToolChain();
    } else {
        for (const ToolChain *toolchain : results) {
            if (toolchain->language() == clangClToolChain->language()) {
                clangClToolChain->resetMsvcToolChain(static_cast<const MsvcToolChain *>(toolchain));
                break;
            }
        }

        qDeleteAll(results);
    }
    setFromClangClToolChain();
}

void ClangClToolChainConfigWidget::discardImpl()
{
    setFromClangClToolChain();
}

void ClangClToolChainConfigWidget::makeReadOnlyImpl()
{
    m_varsBatDisplayCombo->setEnabled(false);
}

// --------------------------------------------------------------------------
// ClangClToolChain, piggy-backing on MSVC2015 and providing the compiler
// clang-cl.exe as a [to some extent] compatible drop-in replacement for cl.
// --------------------------------------------------------------------------

ClangClToolChain::ClangClToolChain(const QString &name,
                                   const QString &clangPath)
    : MsvcToolChain(Constants::CLANG_CL_TOOLCHAIN_TYPEID, name, Abi(), "", "")
    , m_clangPath(clangPath)
{}

ClangClToolChain::ClangClToolChain()
    : MsvcToolChain(Constants::CLANG_CL_TOOLCHAIN_TYPEID)
{}

bool ClangClToolChain::isValid() const
{
    return MsvcToolChain::isValid() && compilerCommand().exists()
           && compilerCommand().fileName() == "clang-cl.exe";
}

void ClangClToolChain::addToEnvironment(Utils::Environment &env) const
{
    MsvcToolChain::addToEnvironment(env);
    QDir path = QFileInfo(m_clangPath).absoluteDir(); // bin folder
    env.prependOrSetPath(path.canonicalPath());
}

Utils::FilePath ClangClToolChain::compilerCommand() const
{
    return Utils::FilePath::fromString(m_clangPath);
}

QString ClangClToolChain::typeDisplayName() const
{
    return QCoreApplication::translate("ProjectExplorer::ClangToolChainFactory", "Clang");
}

QStringList ClangClToolChain::suggestedMkspecList() const
{
    const QString mkspec = "win32-clang-" + Abi::toString(targetAbi().osFlavor());
    return {mkspec, "win32-clang-msvc"};
}

IOutputParser *ClangClToolChain::outputParser() const
{
    return new ClangClParser;
}

static inline QString llvmDirKey()
{
    return QStringLiteral("ProjectExplorer.ClangClToolChain.LlvmDir");
}

QVariantMap ClangClToolChain::toMap() const
{
    QVariantMap result = MsvcToolChain::toMap();
    result.insert(llvmDirKey(), m_clangPath);
    return result;
}

bool ClangClToolChain::fromMap(const QVariantMap &data)
{
    if (!MsvcToolChain::fromMap(data))
        return false;
    const QString clangPath = data.value(llvmDirKey()).toString();
    if (clangPath.isEmpty())
        return false;
    m_clangPath = clangPath;

    return true;
}

std::unique_ptr<ToolChainConfigWidget> ClangClToolChain::createConfigurationWidget()
{
    return std::make_unique<ClangClToolChainConfigWidget>(this);
}

void ClangClToolChain::resetMsvcToolChain(const MsvcToolChain *base)
{
    if (!base) {
        m_abi = Abi();
        changeVcVarsCall("");
        return;
    }

    m_abi = base->targetAbi();
    changeVcVarsCall(base->varsBat(), base->varsBatArg());
}

bool ClangClToolChain::operator==(const ToolChain &other) const
{
    if (!MsvcToolChain::operator==(other))
        return false;

    const auto *clangClTc = static_cast<const ClangClToolChain *>(&other);
    return m_clangPath == clangClTc->m_clangPath;
}

Macros ClangClToolChain::msvcPredefinedMacros(const QStringList &cxxflags,
                                              const Utils::Environment &env) const
{
    if (!cxxflags.contains("--driver-mode=g++"))
        return MsvcToolChain::msvcPredefinedMacros(cxxflags, env);

    Utils::SynchronousProcess cpp;
    cpp.setEnvironment(env.toStringList());
    cpp.setWorkingDirectory(Utils::TemporaryDirectory::masterDirectoryPath());

    QStringList arguments = cxxflags;
    arguments.append(gccPredefinedMacrosOptions(language()));
    arguments.append("-");
    Utils::SynchronousProcessResponse response = cpp.runBlocking(compilerCommand().toString(),
                                                                 arguments);
    if (response.result != Utils::SynchronousProcessResponse::Finished || response.exitCode != 0) {
        // Show the warning but still parse the output.
        QTC_CHECK(false && "clang-cl exited with non-zero code.");
    }

    return Macro::toMacros(response.allRawOutput());
}

Utils::LanguageVersion ClangClToolChain::msvcLanguageVersion(const QStringList &cxxflags,
                                                             const Core::Id &language,
                                                             const Macros &macros) const
{
    if (cxxflags.contains("--driver-mode=g++"))
        return ToolChain::languageVersion(language, macros);
    return MsvcToolChain::msvcLanguageVersion(cxxflags, language, macros);
}

ClangClToolChain::BuiltInHeaderPathsRunner ClangClToolChain::createBuiltInHeaderPathsRunner() const
{
    {
        QMutexLocker locker(m_headerPathsMutex);
        m_headerPaths.clear();
    }

    return MsvcToolChain::createBuiltInHeaderPathsRunner();
}

// --------------------------------------------------------------------------
// MsvcToolChainFactory
// --------------------------------------------------------------------------

MsvcToolChainFactory::MsvcToolChainFactory()
{
    setDisplayName(tr("MSVC"));
    setSupportedToolChainType(Constants::MSVC_TOOLCHAIN_TYPEID);
    setSupportedLanguages({Constants::C_LANGUAGE_ID, Constants::CXX_LANGUAGE_ID});
    setToolchainConstructor([] { return new MsvcToolChain; });
}

QString MsvcToolChainFactory::vcVarsBatFor(const QString &basePath,
                                           MsvcToolChain::Platform platform,
                                           const QVersionNumber &v)
{
    QString result;
    if (const MsvcPlatform *p = platformEntry(platform)) {
        result += basePath;
        // Starting with 15.0 (MSVC2017), the .bat are in one folder.
        if (v.majorVersion() <= 14)
            result += QLatin1String(p->prefix);
        result += QLatin1Char('/');
        result += QLatin1String(p->bat);
    }
    return result;
}

static QList<ToolChain *> findOrCreateToolChain(const QList<ToolChain *> &alreadyKnown,
                                                const QString &name,
                                                const Abi &abi,
                                                const QString &varsBat,
                                                const QString &varsBatArg)
{
    QList<ToolChain *> res;
    for (auto language : {Constants::C_LANGUAGE_ID, Constants::CXX_LANGUAGE_ID}) {
        ToolChain *tc = Utils::findOrDefault(alreadyKnown, [&](ToolChain *tc) -> bool {
            if (tc->typeId() != Constants::MSVC_TOOLCHAIN_TYPEID)
                return false;
            if (tc->targetAbi() != abi)
                return false;
            if (tc->language() != language)
                return false;
            auto mtc = static_cast<MsvcToolChain *>(tc);
            return mtc->varsBat() == varsBat && mtc->varsBatArg() == varsBatArg;
        });
        if (!tc) {
            tc = new MsvcToolChain(name, abi, varsBat, varsBatArg);
            tc->setLanguage(language);
        }
        res << tc;
    }
    return res;
}

// Detect build tools introduced with MSVC2015
static void detectCppBuildTools2015(QList<ToolChain *> *list)
{
    struct Entry
    {
        const char *postFix;
        const char *varsBatArg;
        Abi::Architecture architecture;
        Abi::BinaryFormat format;
        unsigned char wordSize;
    };

    const Entry entries[] = {{" (x86)", "x86", Abi::X86Architecture, Abi::PEFormat, 32},
                             {" (x64)", "amd64", Abi::X86Architecture, Abi::PEFormat, 64},
                             {" (x86_arm)", "x86_arm", Abi::ArmArchitecture, Abi::PEFormat, 32},
                             {" (x64_arm)", "amd64_arm", Abi::ArmArchitecture, Abi::PEFormat, 64}};

    const QString name = QStringLiteral("Microsoft Visual C++ Build Tools");
    const QString vcVarsBat = windowsProgramFilesDir() + QLatin1Char('/') + name
                              + QStringLiteral("/vcbuildtools.bat");
    if (!QFileInfo(vcVarsBat).isFile())
        return;
    for (const Entry &e : entries) {
        const Abi abi(e.architecture,
                      Abi::WindowsOS,
                      Abi::WindowsMsvc2015Flavor,
                      e.format,
                      e.wordSize);
        for (auto language : {Constants::C_LANGUAGE_ID, Constants::CXX_LANGUAGE_ID}) {
            auto tc = new MsvcToolChain(name + QLatin1String(e.postFix),
                                        abi,
                                        vcVarsBat,
                                        QLatin1String(e.varsBatArg));
            tc->setDetection(ToolChain::AutoDetection);
            tc->setLanguage(language);
            list->append(tc);
        }
    }
}

QList<ToolChain *> MsvcToolChainFactory::autoDetect(const QList<ToolChain *> &alreadyKnown)
{
    QList<ToolChain *> results;

    // 1) Installed SDKs preferred over standalone Visual studio
    const QSettings
        sdkRegistry(QLatin1String(
                        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Microsoft SDKs\\Windows"),
                    QSettings::NativeFormat);
    const QString defaultSdkPath = sdkRegistry.value(QLatin1String("CurrentInstallFolder"))
                                       .toString();
    if (!defaultSdkPath.isEmpty()) {
        foreach (const QString &sdkKey, sdkRegistry.childGroups()) {
            const QString name = sdkRegistry.value(sdkKey + QLatin1String("/ProductName")).toString();
            const QString folder = sdkRegistry.value(sdkKey + QLatin1String("/InstallationFolder"))
                                       .toString();
            if (folder.isEmpty())
                continue;

            QDir dir(folder);
            if (!dir.cd(QLatin1String("bin")))
                continue;
            QFileInfo fi(dir, QLatin1String("SetEnv.cmd"));
            if (!fi.exists())
                continue;

            QList<ToolChain *> tmp;
            const QVector<QPair<MsvcToolChain::Platform, QString>> platforms = {
                {MsvcToolChain::x86, "x86"},
                {MsvcToolChain::amd64, "x64"},
                {MsvcToolChain::ia64, "ia64"},
            };
            for (const auto &platform : platforms) {
                tmp.append(findOrCreateToolChain(alreadyKnown,
                                                 generateDisplayName(name,
                                                                     MsvcToolChain::WindowsSDK,
                                                                     platform.first),
                                                 findAbiOfMsvc(MsvcToolChain::WindowsSDK,
                                                               platform.first,
                                                               sdkKey),
                                                 fi.absoluteFilePath(),
                                                 "/" + platform.second));
            }
            // Make sure the default is front.
            if (folder == defaultSdkPath)
                results = tmp + results;
            else
                results += tmp;
        } // foreach
    }

    // 2) Installed MSVCs
    // prioritized list.
    // x86_arm was put before amd64_arm as a workaround for auto detected windows phone
    // toolchains. As soon as windows phone builds support x64 cross builds, this change
    // can be reverted.
    const MsvcToolChain::Platform platforms[] = {MsvcToolChain::x86,
                                                 MsvcToolChain::amd64_x86,
                                                 MsvcToolChain::amd64,
                                                 MsvcToolChain::x86_amd64,
                                                 MsvcToolChain::arm,
                                                 MsvcToolChain::x86_arm,
                                                 MsvcToolChain::amd64_arm,
                                                 MsvcToolChain::ia64,
                                                 MsvcToolChain::x86_ia64};

    foreach (const VisualStudioInstallation &i, detectVisualStudio()) {
        for (MsvcToolChain::Platform platform : platforms) {
            const bool toolchainInstalled
                = QFileInfo(vcVarsBatFor(i.vcVarsPath, platform, i.version)).isFile();
            if (hostSupportsPlatform(platform) && toolchainInstalled) {
                results.append(
                    findOrCreateToolChain(alreadyKnown,
                                          generateDisplayName(i.vsName, MsvcToolChain::VS, platform),
                                          findAbiOfMsvc(MsvcToolChain::VS, platform, i.vsName),
                                          i.vcVarsAll,
                                          platformName(platform)));
            }
        }
    }

    detectCppBuildTools2015(&results);

    for (ToolChain *tc : results)
        tc->setDetection(ToolChain::AutoDetection);

    return results;
}

ClangClToolChainFactory::ClangClToolChainFactory()
{
    setDisplayName(tr("clang-cl"));
    setSupportedLanguages({Constants::C_LANGUAGE_ID, Constants::CXX_LANGUAGE_ID});
    setSupportedToolChainType(Constants::CLANG_CL_TOOLCHAIN_TYPEID);
    setToolchainConstructor([] { return new ClangClToolChain; });
}

bool ClangClToolChainFactory::canCreate() const
{
    return !g_availableMsvcToolchains.isEmpty();
}

QList<ToolChain *> ClangClToolChainFactory::autoDetect(const QList<ToolChain *> &alreadyKnown)
{
    Q_UNUSED(alreadyKnown)

#ifdef Q_OS_WIN64
    const char registryNode[] = "HKEY_LOCAL_MACHINE\\SOFTWARE\\WOW6432Node\\LLVM\\LLVM";
#else
    const char registryNode[] = "HKEY_LOCAL_MACHINE\\SOFTWARE\\LLVM\\LLVM";
#endif

    QList<ToolChain *> results;
    QList<ToolChain *> known = alreadyKnown;

    QString qtCreatorsClang = Core::ICore::clangExecutable(CLANG_BINDIR);
    if (!qtCreatorsClang.isEmpty()) {
        qtCreatorsClang = Utils::FilePath::fromString(qtCreatorsClang)
                              .parentDir()
                              .pathAppended("clang-cl.exe")
                              .toString();
        results.append(detectClangClToolChainInPath(qtCreatorsClang, alreadyKnown, "", true));
        known.append(results);
    }

    const QSettings registry(QLatin1String(registryNode), QSettings::NativeFormat);
    if (registry.status() == QSettings::NoError) {
        const QString path = QDir::cleanPath(registry.value(QStringLiteral(".")).toString());
        const QString clangClPath = compilerFromPath(path);
        if (!path.isEmpty()) {
            results.append(detectClangClToolChainInPath(clangClPath, known, ""));
            known.append(results);
        }
    }

    const Utils::Environment systemEnvironment = Utils::Environment::systemEnvironment();
    const Utils::FilePath clangClPath = systemEnvironment.searchInPath("clang-cl");
    if (!clangClPath.isEmpty())
        results.append(detectClangClToolChainInPath(clangClPath.toString(), known, ""));

    return results;
}

ToolChain *ClangClToolChainFactory::create()
{
    return new ClangClToolChain("clang-cl", "");
}

bool MsvcToolChain::operator==(const ToolChain &other) const
{
    if (!ToolChain::operator==(other))
        return false;

    const auto *msvcTc = dynamic_cast<const MsvcToolChain *>(&other);
    return targetAbi() == msvcTc->targetAbi() && m_vcvarsBat == msvcTc->m_vcvarsBat
           && m_varsBatArg == msvcTc->m_varsBatArg;
}

void MsvcToolChain::cancelMsvcToolChainDetection()
{
    envModThreadPool()->clear();
}

Utils::optional<QString> MsvcToolChain::generateEnvironmentSettings(const Utils::Environment &env,
                                                                    const QString &batchFile,
                                                                    const QString &batchArgs,
                                                                    QMap<QString, QString> &envPairs)
{
    const QString marker = "####################";
    // Create a temporary file name for the output. Use a temporary file here
    // as I don't know another way to do this in Qt...

    // Create a batch file to create and save the env settings
    Utils::TempFileSaver saver(Utils::TemporaryDirectory::masterDirectoryPath() + "/XXXXXX.bat");

    QByteArray call = "call ";
    call += Utils::QtcProcess::quoteArg(batchFile).toLocal8Bit();
    if (!batchArgs.isEmpty()) {
        call += ' ';
        call += batchArgs.toLocal8Bit();
    }
    if (Utils::HostOsInfo::isWindowsHost())
        saver.write("chcp 65001\r\n");
    saver.write(call + "\r\n");
    saver.write("@echo " + marker.toLocal8Bit() + "\r\n");
    saver.write("set\r\n");
    saver.write("@echo " + marker.toLocal8Bit() + "\r\n");
    if (!saver.finalize()) {
        qWarning("%s: %s", Q_FUNC_INFO, qPrintable(saver.errorString()));
        return QString();
    }

    Utils::SynchronousProcess run;

    // As of WinSDK 7.1, there is logic preventing the path from being set
    // correctly if "ORIGINALPATH" is already set. That can cause problems
    // if Creator is launched within a session set up by setenv.cmd.
    Utils::Environment runEnv = env;
    runEnv.unset(QLatin1String("ORIGINALPATH"));
    run.setEnvironment(runEnv.toStringList());
    run.setTimeoutS(30);
    Utils::FilePath cmdPath = Utils::FilePath::fromUserInput(
        QString::fromLocal8Bit(qgetenv("COMSPEC")));
    if (cmdPath.isEmpty())
        cmdPath = env.searchInPath(QLatin1String("cmd.exe"));
    // Windows SDK setup scripts require command line switches for environment expansion.
    QStringList cmdArguments({QLatin1String("/E:ON"), QLatin1String("/V:ON"), QLatin1String("/c")});
    cmdArguments << QDir::toNativeSeparators(saver.fileName());
    if (debug)
        qDebug() << "readEnvironmentSetting: " << call << cmdPath << cmdArguments.join(' ')
                 << " Env: " << runEnv.size();
    run.setCodec(QTextCodec::codecForName("UTF-8"));
    Utils::SynchronousProcessResponse response = run.runBlocking(cmdPath.toString(), cmdArguments);

    if (response.result != Utils::SynchronousProcessResponse::Finished) {
        const QString message = !response.stdErr().isEmpty()
                                    ? response.stdErr()
                                    : response.exitMessage(cmdPath.toString(), 10);
        qWarning().noquote() << message;
        QString command = QDir::toNativeSeparators(batchFile);
        if (!batchArgs.isEmpty())
            command += ' ' + batchArgs;
        return QCoreApplication::translate("ProjectExplorer::Internal::MsvcToolChain",
                                           "Failed to retrieve MSVC Environment from \"%1\":\n"
                                           "%2")
            .arg(command, message);
    }

    // The SDK/MSVC scripts do not return exit codes != 0. Check on stdout.
    const QString stdOut = response.stdOut();

    //
    // Now parse the file to get the environment settings
    const int start = stdOut.indexOf(marker);
    if (start == -1) {
        qWarning("Could not find start marker in stdout output.");
        return QString();
    }

    const int end = stdOut.indexOf(marker, start + 1);
    if (end == -1) {
        qWarning("Could not find end marker in stdout output.");
        return QString();
    }

    const QString output = stdOut.mid(start, end - start);

    foreach (const QString &line, output.split(QLatin1String("\n"))) {
        const int pos = line.indexOf('=');
        if (pos > 0) {
            const QString varName = line.mid(0, pos);
            const QString varValue = line.mid(pos + 1);
            envPairs.insert(varName, varValue);
        }
    }

    return Utils::nullopt;
}

bool MsvcToolChainFactory::canCreate() const
{
    return !g_availableMsvcToolchains.isEmpty();
}

ToolChain *MsvcToolChainFactory::create()
{
    return new MsvcToolChain("Microsoft Visual C++ Compiler",
                             Abi::hostAbi(), g_availableMsvcToolchains.first()->varsBat(), "");
}

MsvcToolChain::WarningFlagAdder::WarningFlagAdder(const QString &flag, WarningFlags &flags)
    : m_flags(flags)
{
    if (flag.startsWith(QLatin1String("-wd"))) {
        m_doesEnable = false;
    } else if (flag.startsWith(QLatin1String("-w"))) {
        m_doesEnable = true;
    } else {
        m_triggered = true;
        return;
    }
    bool ok = false;
    if (m_doesEnable)
        m_warningCode = flag.midRef(2).toInt(&ok);
    else
        m_warningCode = flag.midRef(3).toInt(&ok);
    if (!ok)
        m_triggered = true;
}

void MsvcToolChain::WarningFlagAdder::operator()(int warningCode, WarningFlags flagsSet)
{
    if (m_triggered)
        return;
    if (warningCode == m_warningCode) {
        m_triggered = true;
        if (m_doesEnable)
            m_flags |= flagsSet;
        else
            m_flags &= ~flagsSet;
    }
}

bool MsvcToolChain::WarningFlagAdder::triggered() const
{
    return m_triggered;
}

} // namespace Internal
} // namespace ProjectExplorer

Q_DECLARE_METATYPE(ProjectExplorer::Internal::MsvcToolChain::Platform)