/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   file Copyright.txt or https://cmake.org/licensing for details.  */
#include "cmQtAutoGeneratorInitializer.h"

#include "cmAlgorithms.h"
#include "cmCustomCommandLines.h"
#include "cmFilePathUuid.h"
#include "cmGeneratorTarget.h"
#include "cmGlobalGenerator.h"
#include "cmLocalGenerator.h"
#include "cmMakefile.h"
#include "cmOutputConverter.h"
#include "cmSourceFile.h"
#include "cmSourceFileLocation.h"
#include "cmState.h"
#include "cmSystemTools.h"
#include "cmTarget.h"
#include "cmake.h"

#if defined(_WIN32) && !defined(__CYGWIN__)
#include "cmGlobalVisualStudioGenerator.h"
#endif

#include <algorithm>
#include <assert.h>
#include <cmConfigure.h>
#include <cmsys/FStream.hxx>
#include <cmsys/RegularExpression.hxx>
#include <iostream>
#include <map>
#include <set>
#include <sstream>
#include <string.h>
#include <string>
#include <sys/stat.h>
#include <utility>
#include <vector>

static std::string GetAutogenTargetName(cmGeneratorTarget const* target)
{
  std::string autogenTargetName = target->GetName();
  autogenTargetName += "_automoc";
  return autogenTargetName;
}

static std::string GetAutogenTargetDir(cmGeneratorTarget const* target)
{
  cmMakefile* makefile = target->Target->GetMakefile();
  std::string targetDir = makefile->GetCurrentBinaryDirectory();
  targetDir += makefile->GetCMakeInstance()->GetCMakeFilesDirectory();
  targetDir += "/";
  targetDir += GetAutogenTargetName(target);
  targetDir += ".dir/";
  return targetDir;
}

static std::string GetAutogenTargetBuildDir(cmGeneratorTarget const* target)
{
  cmMakefile* makefile = target->Target->GetMakefile();
  std::string targetDir = makefile->GetCurrentBinaryDirectory();
  targetDir += "/";
  targetDir += GetAutogenTargetName(target);
  targetDir += ".dir/";
  return targetDir;
}

static void SetupSourceFiles(cmGeneratorTarget const* target,
                             std::vector<std::string>& skipMoc,
                             std::vector<std::string>& mocSources,
                             std::vector<std::string>& mocHeaders,
                             std::vector<std::string>& skipUic)
{
  cmMakefile* makefile = target->Target->GetMakefile();

  std::vector<cmSourceFile*> srcFiles;
  target->GetConfigCommonSourceFiles(srcFiles);

  std::vector<std::string> newRccFiles;

  cmFilePathUuid fpathUuid(makefile);
  for (std::vector<cmSourceFile*>::const_iterator fileIt = srcFiles.begin();
       fileIt != srcFiles.end(); ++fileIt) {
    cmSourceFile* sf = *fileIt;
    std::string absFile = cmsys::SystemTools::GetRealPath(sf->GetFullPath());
    bool skipFileForMoc =
      cmSystemTools::IsOn(sf->GetPropertyForUser("SKIP_AUTOMOC"));
    bool generated = cmSystemTools::IsOn(sf->GetPropertyForUser("GENERATED"));

    if (cmSystemTools::IsOn(sf->GetPropertyForUser("SKIP_AUTOUIC"))) {
      skipUic.push_back(absFile);
    }

    std::string ext = sf->GetExtension();

    if (target->GetPropertyAsBool("AUTORCC")) {
      if (ext == "qrc" &&
          !cmSystemTools::IsOn(sf->GetPropertyForUser("SKIP_AUTORCC"))) {

        std::string rcc_output_file = GetAutogenTargetBuildDir(target);
        // Create output directory
        cmSystemTools::MakeDirectory(rcc_output_file.c_str());
        rcc_output_file += fpathUuid.get(absFile, "qrc_", ".cpp");

        makefile->AppendProperty("ADDITIONAL_MAKE_CLEAN_FILES",
                                 rcc_output_file.c_str(), false);
        makefile->GetOrCreateSource(rcc_output_file, true);
        newRccFiles.push_back(rcc_output_file);
      }
    }

    if (!generated) {
      if (skipFileForMoc) {
        skipMoc.push_back(absFile);
      } else {
        cmSystemTools::FileFormat fileType =
          cmSystemTools::GetFileFormat(ext.c_str());
        if (fileType == cmSystemTools::CXX_FILE_FORMAT) {
          mocSources.push_back(absFile);
        } else if (fileType == cmSystemTools::HEADER_FILE_FORMAT) {
          mocHeaders.push_back(absFile);
        }
      }
    }
  }

  for (std::vector<std::string>::const_iterator fileIt = newRccFiles.begin();
       fileIt != newRccFiles.end(); ++fileIt) {
    const_cast<cmGeneratorTarget*>(target)->AddSource(*fileIt);
  }
}

static void GetCompileDefinitionsAndDirectories(
  cmGeneratorTarget const* target, const std::string& config,
  std::string& incs, std::string& defs)
{
  std::vector<std::string> includeDirs;
  cmLocalGenerator* localGen = target->GetLocalGenerator();
  // Get the include dirs for this target, without stripping the implicit
  // include dirs off, see https://gitlab.kitware.com/cmake/cmake/issues/13667
  localGen->GetIncludeDirectories(includeDirs, target, "CXX", config, false);

  incs = cmJoin(includeDirs, ";");

  std::set<std::string> defines;
  localGen->AddCompileDefinitions(defines, target, config, "CXX");

  defs += cmJoin(defines, ";");
}

static void SetupAutoMocTarget(
  cmGeneratorTarget const* target, const std::string& autogenTargetName,
  std::vector<std::string> const& skipMoc,
  std::vector<std::string> const& mocHeaders,
  std::map<std::string, std::string>& configIncludes,
  std::map<std::string, std::string>& configDefines)
{
  cmLocalGenerator* lg = target->GetLocalGenerator();
  cmMakefile* makefile = target->Target->GetMakefile();

  const char* tmp = target->GetProperty("AUTOMOC_MOC_OPTIONS");
  std::string _moc_options = (tmp != CM_NULLPTR ? tmp : "");
  makefile->AddDefinition(
    "_moc_options", cmOutputConverter::EscapeForCMake(_moc_options).c_str());
  makefile->AddDefinition(
    "_skip_moc",
    cmOutputConverter::EscapeForCMake(cmJoin(skipMoc, ";")).c_str());
  makefile->AddDefinition(
    "_moc_headers",
    cmOutputConverter::EscapeForCMake(cmJoin(mocHeaders, ";")).c_str());
  bool relaxedMode = makefile->IsOn("CMAKE_AUTOMOC_RELAXED_MODE");
  makefile->AddDefinition("_moc_relaxed_mode", relaxedMode ? "TRUE" : "FALSE");

  std::string _moc_incs;
  std::string _moc_compile_defs;
  std::vector<std::string> configs;
  const std::string& config = makefile->GetConfigurations(configs);
  GetCompileDefinitionsAndDirectories(target, config, _moc_incs,
                                      _moc_compile_defs);

  makefile->AddDefinition(
    "_moc_incs", cmOutputConverter::EscapeForCMake(_moc_incs).c_str());
  makefile->AddDefinition(
    "_moc_compile_defs",
    cmOutputConverter::EscapeForCMake(_moc_compile_defs).c_str());

  for (std::vector<std::string>::const_iterator li = configs.begin();
       li != configs.end(); ++li) {
    std::string config_moc_incs;
    std::string config_moc_compile_defs;
    GetCompileDefinitionsAndDirectories(target, *li, config_moc_incs,
                                        config_moc_compile_defs);
    if (config_moc_incs != _moc_incs) {
      configIncludes[*li] = cmOutputConverter::EscapeForCMake(config_moc_incs);
      if (_moc_incs.empty()) {
        _moc_incs = config_moc_incs;
      }
    }
    if (config_moc_compile_defs != _moc_compile_defs) {
      configDefines[*li] =
        cmOutputConverter::EscapeForCMake(config_moc_compile_defs);
      if (_moc_compile_defs.empty()) {
        _moc_compile_defs = config_moc_compile_defs;
      }
    }
  }

  const char* qtVersion = makefile->GetDefinition("_target_qt_version");
  if (strcmp(qtVersion, "5") == 0) {
    cmGeneratorTarget* qt5Moc = lg->FindGeneratorTargetToUse("Qt5::moc");
    if (!qt5Moc) {
      cmSystemTools::Error("Qt5::moc target not found ",
                           autogenTargetName.c_str());
      return;
    }
    makefile->AddDefinition("_qt_moc_executable",
                            qt5Moc->ImportedGetLocation(""));
  } else if (strcmp(qtVersion, "4") == 0) {
    cmGeneratorTarget* qt4Moc = lg->FindGeneratorTargetToUse("Qt4::moc");
    if (!qt4Moc) {
      cmSystemTools::Error("Qt4::moc target not found ",
                           autogenTargetName.c_str());
      return;
    }
    makefile->AddDefinition("_qt_moc_executable",
                            qt4Moc->ImportedGetLocation(""));
  } else {
    cmSystemTools::Error("The CMAKE_AUTOMOC feature supports only Qt 4 and "
                         "Qt 5 ",
                         autogenTargetName.c_str());
  }
}

static void GetUicOpts(cmGeneratorTarget const* target,
                       const std::string& config, std::string& optString)
{
  std::vector<std::string> opts;
  target->GetAutoUicOptions(opts, config);
  optString = cmJoin(opts, ";");
}

static void SetupAutoUicTarget(
  cmGeneratorTarget const* target, std::vector<std::string> const& skipUic,
  std::map<std::string, std::string>& configUicOptions)
{
  cmLocalGenerator* lg = target->GetLocalGenerator();
  cmMakefile* makefile = target->Target->GetMakefile();

  std::set<std::string> skipped;
  skipped.insert(skipUic.begin(), skipUic.end());

  makefile->AddDefinition(
    "_skip_uic",
    cmOutputConverter::EscapeForCMake(cmJoin(skipUic, ";")).c_str());

  std::vector<cmSourceFile*> uiFilesWithOptions =
    makefile->GetQtUiFilesWithOptions();

  const char* qtVersion = makefile->GetDefinition("_target_qt_version");

  std::string _uic_opts;
  std::vector<std::string> configs;
  const std::string& config = makefile->GetConfigurations(configs);
  GetUicOpts(target, config, _uic_opts);

  if (!_uic_opts.empty()) {
    _uic_opts = cmOutputConverter::EscapeForCMake(_uic_opts);
    makefile->AddDefinition("_uic_target_options", _uic_opts.c_str());
  }
  for (std::vector<std::string>::const_iterator li = configs.begin();
       li != configs.end(); ++li) {
    std::string config_uic_opts;
    GetUicOpts(target, *li, config_uic_opts);
    if (config_uic_opts != _uic_opts) {
      configUicOptions[*li] =
        cmOutputConverter::EscapeForCMake(config_uic_opts);
      if (_uic_opts.empty()) {
        _uic_opts = config_uic_opts;
      }
    }
  }

  std::string uiFileFiles;
  std::string uiFileOptions;
  const char* sep = "";

  for (std::vector<cmSourceFile*>::const_iterator fileIt =
         uiFilesWithOptions.begin();
       fileIt != uiFilesWithOptions.end(); ++fileIt) {
    cmSourceFile* sf = *fileIt;
    std::string absFile = cmsys::SystemTools::GetRealPath(sf->GetFullPath());

    if (!skipped.insert(absFile).second) {
      continue;
    }
    uiFileFiles += sep;
    uiFileFiles += absFile;
    uiFileOptions += sep;
    std::string opts = sf->GetProperty("AUTOUIC_OPTIONS");
    cmSystemTools::ReplaceString(opts, ";", "@list_sep@");
    uiFileOptions += opts;
    sep = ";";
  }

  makefile->AddDefinition(
    "_qt_uic_options_files",
    cmOutputConverter::EscapeForCMake(uiFileFiles).c_str());
  makefile->AddDefinition(
    "_qt_uic_options_options",
    cmOutputConverter::EscapeForCMake(uiFileOptions).c_str());

  std::string targetName = target->GetName();
  if (strcmp(qtVersion, "5") == 0) {
    cmGeneratorTarget* qt5Uic = lg->FindGeneratorTargetToUse("Qt5::uic");
    if (!qt5Uic) {
      // Project does not use Qt5Widgets, but has AUTOUIC ON anyway
    } else {
      makefile->AddDefinition("_qt_uic_executable",
                              qt5Uic->ImportedGetLocation(""));
    }
  } else if (strcmp(qtVersion, "4") == 0) {
    cmGeneratorTarget* qt4Uic = lg->FindGeneratorTargetToUse("Qt4::uic");
    if (!qt4Uic) {
      cmSystemTools::Error("Qt4::uic target not found ", targetName.c_str());
      return;
    }
    makefile->AddDefinition("_qt_uic_executable",
                            qt4Uic->ImportedGetLocation(""));
  } else {
    cmSystemTools::Error("The CMAKE_AUTOUIC feature supports only Qt 4 and "
                         "Qt 5 ",
                         targetName.c_str());
  }
}

static std::string GetRccExecutable(cmGeneratorTarget const* target)
{
  cmLocalGenerator* lg = target->GetLocalGenerator();
  cmMakefile* makefile = target->Target->GetMakefile();
  const char* qtVersion = makefile->GetDefinition("_target_qt_version");
  if (!qtVersion) {
    qtVersion = makefile->GetDefinition("Qt5Core_VERSION_MAJOR");
    if (!qtVersion) {
      qtVersion = makefile->GetDefinition("QT_VERSION_MAJOR");
    }
    if (const char* targetQtVersion =
          target->GetLinkInterfaceDependentStringProperty("QT_MAJOR_VERSION",
                                                          "")) {
      qtVersion = targetQtVersion;
    }
  }

  std::string targetName = target->GetName();
  if (strcmp(qtVersion, "5") == 0) {
    cmGeneratorTarget* qt5Rcc = lg->FindGeneratorTargetToUse("Qt5::rcc");
    if (!qt5Rcc) {
      cmSystemTools::Error("Qt5::rcc target not found ", targetName.c_str());
      return std::string();
    }
    return qt5Rcc->ImportedGetLocation("");
  }
  if (strcmp(qtVersion, "4") == 0) {
    cmGeneratorTarget* qt4Rcc = lg->FindGeneratorTargetToUse("Qt4::rcc");
    if (!qt4Rcc) {
      cmSystemTools::Error("Qt4::rcc target not found ", targetName.c_str());
      return std::string();
    }
    return qt4Rcc->ImportedGetLocation("");
  }

  cmSystemTools::Error("The CMAKE_AUTORCC feature supports only Qt 4 and "
                       "Qt 5 ",
                       targetName.c_str());
  return std::string();
}

static void MergeRccOptions(std::vector<std::string>& opts,
                            const std::vector<std::string>& fileOpts,
                            bool isQt5)
{
  static const char* valueOptions[] = { "name", "root", "compress",
                                        "threshold" };
  std::vector<std::string> extraOpts;
  for (std::vector<std::string>::const_iterator it = fileOpts.begin();
       it != fileOpts.end(); ++it) {
    std::vector<std::string>::iterator existingIt =
      std::find(opts.begin(), opts.end(), *it);
    if (existingIt != opts.end()) {
      const char* o = it->c_str();
      if (*o == '-') {
        ++o;
      }
      if (isQt5 && *o == '-') {
        ++o;
      }
      if (std::find_if(cmArrayBegin(valueOptions), cmArrayEnd(valueOptions),
                       cmStrCmp(*it)) != cmArrayEnd(valueOptions)) {
        assert(existingIt + 1 != opts.end());
        *(existingIt + 1) = *(it + 1);
        ++it;
      }
    } else {
      extraOpts.push_back(*it);
    }
  }
  opts.insert(opts.end(), extraOpts.begin(), extraOpts.end());
}

static void copyTargetProperty(cmTarget* destinationTarget,
                               cmTarget* sourceTarget,
                               const std::string& propertyName)
{
  const char* propertyValue = sourceTarget->GetProperty(propertyName);
  if (propertyValue) {
    destinationTarget->SetProperty(propertyName, propertyValue);
  }
}

static std::string cmQtAutoGeneratorsStripCR(std::string const& line)
{
  // Strip CR characters rcc may have printed (possibly more than one!).
  std::string::size_type cr = line.find('\r');
  if (cr != line.npos) {
    return line.substr(0, cr);
  }
  return line;
}

static std::string ReadAll(const std::string& filename)
{
  cmsys::ifstream file(filename.c_str());
  std::ostringstream stream;
  stream << file.rdbuf();
  file.close();
  return stream.str();
}

static std::string ListQt5RccInputs(cmSourceFile* sf,
                                    cmGeneratorTarget const* target,
                                    std::vector<std::string>& depends)
{
  std::string rccCommand = GetRccExecutable(target);

  bool hasDashDashList = false;
  {
    std::vector<std::string> command;
    command.push_back(rccCommand);
    command.push_back("--help");
    std::string rccStdOut;
    std::string rccStdErr;
    int retVal = 0;
    bool result =
      cmSystemTools::RunSingleCommand(command, &rccStdOut, &rccStdErr, &retVal,
                                      CM_NULLPTR, cmSystemTools::OUTPUT_NONE);
    if (result && retVal == 0 &&
        rccStdOut.find("--list") != std::string::npos) {
      hasDashDashList = true;
    }
  }

  std::vector<std::string> qrcEntries;

  std::vector<std::string> command;
  command.push_back(rccCommand);
  command.push_back(hasDashDashList ? "--list" : "-list");

  std::string absFile = cmsys::SystemTools::GetRealPath(sf->GetFullPath());

  command.push_back(absFile);

  std::string rccStdOut;
  std::string rccStdErr;
  int retVal = 0;
  bool result =
    cmSystemTools::RunSingleCommand(command, &rccStdOut, &rccStdErr, &retVal,
                                    CM_NULLPTR, cmSystemTools::OUTPUT_NONE);
  if (!result || retVal) {
    std::ostringstream err;
    err << "AUTOGEN: error: Rcc list process for " << sf->GetFullPath()
        << " failed:\n"
        << rccStdOut << "\n"
        << rccStdErr << std::endl;
    std::cerr << err.str();
    return std::string();
  }

  {
    std::istringstream ostr(rccStdOut);
    std::string oline;
    while (std::getline(ostr, oline)) {
      oline = cmQtAutoGeneratorsStripCR(oline);
      if (!oline.empty()) {
        qrcEntries.push_back(oline);
      }
    }
  }

  {
    std::istringstream estr(rccStdErr);
    std::string eline;
    while (std::getline(estr, eline)) {
      eline = cmQtAutoGeneratorsStripCR(eline);
      if (cmHasLiteralPrefix(eline, "RCC: Error in")) {
        static std::string searchString = "Cannot find file '";

        std::string::size_type pos = eline.find(searchString);
        if (pos == std::string::npos) {
          std::ostringstream err;
          err << "AUTOGEN: error: Rcc lists unparsable output " << eline
              << std::endl;
          std::cerr << err.str();
          return std::string();
        }
        pos += searchString.length();
        std::string::size_type sz = eline.size() - pos - 1;
        qrcEntries.push_back(eline.substr(pos, sz));
      }
    }
  }

  depends.insert(depends.end(), qrcEntries.begin(), qrcEntries.end());
  return cmJoin(qrcEntries, "@list_sep@");
}

static std::string ListQt4RccInputs(cmSourceFile* sf,
                                    std::vector<std::string>& depends)
{
  const std::string qrcContents = ReadAll(sf->GetFullPath());

  cmsys::RegularExpression fileMatchRegex("(<file[^<]+)");

  std::string entriesList;
  const char* sep = "";

  size_t offset = 0;
  while (fileMatchRegex.find(qrcContents.c_str() + offset)) {
    std::string qrcEntry = fileMatchRegex.match(1);

    offset += qrcEntry.size();

    cmsys::RegularExpression fileReplaceRegex("(^<file[^>]*>)");
    fileReplaceRegex.find(qrcEntry);
    std::string tag = fileReplaceRegex.match(1);

    qrcEntry = qrcEntry.substr(tag.size());

    if (!cmSystemTools::FileIsFullPath(qrcEntry.c_str())) {
      qrcEntry = sf->GetLocation().GetDirectory() + "/" + qrcEntry;
    }

    entriesList += sep;
    entriesList += qrcEntry;
    sep = "@list_sep@";
    depends.push_back(qrcEntry);
  }
  return entriesList;
}

static void SetupAutoRccTarget(cmGeneratorTarget const* target)
{
  std::string _rcc_files;
  const char* sepRccFiles = "";
  cmMakefile* makefile = target->Target->GetMakefile();

  std::vector<cmSourceFile*> srcFiles;
  target->GetConfigCommonSourceFiles(srcFiles);

  std::string qrcInputs;
  const char* qrcInputsSep = "";

  std::string rccFileFiles;
  std::string rccFileOptions;
  const char* optionSep = "";

  const char* qtVersion = makefile->GetDefinition("_target_qt_version");

  std::vector<std::string> rccOptions;
  if (const char* opts = target->GetProperty("AUTORCC_OPTIONS")) {
    cmSystemTools::ExpandListArgument(opts, rccOptions);
  }
  std::string qtMajorVersion = makefile->GetSafeDefinition("QT_VERSION_MAJOR");
  if (qtMajorVersion == "") {
    qtMajorVersion = makefile->GetSafeDefinition("Qt5Core_VERSION_MAJOR");
  }

  for (std::vector<cmSourceFile*>::const_iterator fileIt = srcFiles.begin();
       fileIt != srcFiles.end(); ++fileIt) {
    cmSourceFile* sf = *fileIt;
    std::string ext = sf->GetExtension();
    if (ext == "qrc") {
      std::string absFile = cmsys::SystemTools::GetRealPath(sf->GetFullPath());
      bool skip = cmSystemTools::IsOn(sf->GetPropertyForUser("SKIP_AUTORCC"));

      if (!skip) {
        _rcc_files += sepRccFiles;
        _rcc_files += absFile;
        sepRccFiles = ";";

        if (const char* prop = sf->GetProperty("AUTORCC_OPTIONS")) {
          std::vector<std::string> optsVec;
          cmSystemTools::ExpandListArgument(prop, optsVec);
          MergeRccOptions(rccOptions, optsVec, strcmp(qtVersion, "5") == 0);
        }

        if (!rccOptions.empty()) {
          rccFileFiles += optionSep;
          rccFileFiles += absFile;
          rccFileOptions += optionSep;
        }
        const char* listSep = "";
        for (std::vector<std::string>::const_iterator it = rccOptions.begin();
             it != rccOptions.end(); ++it) {
          rccFileOptions += listSep;
          rccFileOptions += *it;
          listSep = "@list_sep@";
        }
        optionSep = ";";

        std::vector<std::string> depends;

        std::string entriesList;
        if (!cmSystemTools::IsOn(sf->GetPropertyForUser("GENERATED"))) {
          if (qtMajorVersion == "5") {
            entriesList = ListQt5RccInputs(sf, target, depends);
          } else {
            entriesList = ListQt4RccInputs(sf, depends);
          }
          if (entriesList.empty()) {
            return;
          }
        }
        qrcInputs += qrcInputsSep;
        qrcInputs += entriesList;
        qrcInputsSep = ";";
      }
    }
  }
  makefile->AddDefinition(
    "_qt_rcc_inputs_" + target->GetName(),
    cmOutputConverter::EscapeForCMake(qrcInputs).c_str());

  makefile->AddDefinition(
    "_rcc_files", cmOutputConverter::EscapeForCMake(_rcc_files).c_str());

  makefile->AddDefinition(
    "_qt_rcc_options_files",
    cmOutputConverter::EscapeForCMake(rccFileFiles).c_str());
  makefile->AddDefinition(
    "_qt_rcc_options_options",
    cmOutputConverter::EscapeForCMake(rccFileOptions).c_str());

  makefile->AddDefinition("_qt_rcc_executable",
                          GetRccExecutable(target).c_str());
}

void cmQtAutoGeneratorInitializer::InitializeAutogenSources(
  cmGeneratorTarget* target)
{
  cmMakefile* makefile = target->Target->GetMakefile();

  if (target->GetPropertyAsBool("AUTOMOC")) {
    std::string automocTargetName = GetAutogenTargetName(target);
    std::string mocCppFile = makefile->GetCurrentBinaryDirectory();
    mocCppFile += "/";
    mocCppFile += automocTargetName;
    mocCppFile += ".cpp";
    makefile->GetOrCreateSource(mocCppFile, true);
    makefile->AppendProperty("ADDITIONAL_MAKE_CLEAN_FILES", mocCppFile.c_str(),
                             false);

    target->AddSource(mocCppFile);
  }
}

void cmQtAutoGeneratorInitializer::InitializeAutogenTarget(
  cmLocalGenerator* lg, cmGeneratorTarget* target)
{
  cmMakefile* makefile = target->Target->GetMakefile();

  std::string qtMajorVersion = makefile->GetSafeDefinition("QT_VERSION_MAJOR");
  if (qtMajorVersion == "") {
    qtMajorVersion = makefile->GetSafeDefinition("Qt5Core_VERSION_MAJOR");
  }

  // create a custom target for running generators at buildtime:
  std::string autogenTargetName = GetAutogenTargetName(target);

  std::string targetDir = GetAutogenTargetDir(target);

  cmCustomCommandLine currentLine;
  currentLine.push_back(cmSystemTools::GetCMakeCommand());
  currentLine.push_back("-E");
  currentLine.push_back("cmake_autogen");
  currentLine.push_back(targetDir);
  currentLine.push_back("$<CONFIGURATION>");

  cmCustomCommandLines commandLines;
  commandLines.push_back(currentLine);

  std::string workingDirectory =
    cmSystemTools::CollapseFullPath("", makefile->GetCurrentBinaryDirectory());

  std::vector<std::string> depends;
  if (const char* autogenDepends =
        target->GetProperty("AUTOGEN_TARGET_DEPENDS")) {
    cmSystemTools::ExpandListArgument(autogenDepends, depends);
  }
  std::vector<std::string> toolNames;
  if (target->GetPropertyAsBool("AUTOMOC")) {
    toolNames.push_back("moc");
  }
  if (target->GetPropertyAsBool("AUTOUIC")) {
    toolNames.push_back("uic");
  }
  if (target->GetPropertyAsBool("AUTORCC")) {
    toolNames.push_back("rcc");
  }

  std::string tools = toolNames[0];
  toolNames.erase(toolNames.begin());
  while (toolNames.size() > 1) {
    tools += ", " + toolNames[0];
    toolNames.erase(toolNames.begin());
  }
  if (toolNames.size() == 1) {
    tools += " and " + toolNames[0];
  }
  std::string autogenComment = "Automatic " + tools + " for target ";
  autogenComment += target->GetName();

#if defined(_WIN32) && !defined(__CYGWIN__)
  bool usePRE_BUILD = false;
  cmGlobalGenerator* gg = lg->GetGlobalGenerator();
  if (gg->GetName().find("Visual Studio") != std::string::npos) {
    cmGlobalVisualStudioGenerator* vsgg =
      static_cast<cmGlobalVisualStudioGenerator*>(gg);
    // Under VS >= 7 use a PRE_BUILD event instead of a separate target to
    // reduce the number of targets loaded into the IDE.
    // This also works around a VS 11 bug that may skip updating the target:
    //  https://connect.microsoft.com/VisualStudio/feedback/details/769495
    usePRE_BUILD = vsgg->GetVersion() >= cmGlobalVisualStudioGenerator::VS7;
    if (usePRE_BUILD) {
      for (std::vector<std::string>::iterator it = depends.begin();
           it != depends.end(); ++it) {
        if (!makefile->FindTargetToUse(it->c_str())) {
          usePRE_BUILD = false;
          break;
        }
      }
    }
  }
#endif

  std::vector<std::string> rcc_output;
  bool const isNinja = lg->GetGlobalGenerator()->GetName() == "Ninja";
  if (isNinja
#if defined(_WIN32) && !defined(__CYGWIN__)
      || usePRE_BUILD
#endif
      ) {
    std::vector<cmSourceFile*> srcFiles;
    target->GetConfigCommonSourceFiles(srcFiles);
    cmFilePathUuid fpathUuid(makefile);
    for (std::vector<cmSourceFile*>::const_iterator fileIt = srcFiles.begin();
         fileIt != srcFiles.end(); ++fileIt) {
      cmSourceFile* sf = *fileIt;
      std::string absFile = cmsys::SystemTools::GetRealPath(sf->GetFullPath());

      std::string ext = sf->GetExtension();

      if (target->GetPropertyAsBool("AUTORCC")) {
        if (ext == "qrc" &&
            !cmSystemTools::IsOn(sf->GetPropertyForUser("SKIP_AUTORCC"))) {
          {
            std::string rcc_output_file = GetAutogenTargetBuildDir(target);
            // Create output directory
            cmSystemTools::MakeDirectory(rcc_output_file.c_str());
            rcc_output_file += fpathUuid.get(absFile, "qrc_", ".cpp");
            rcc_output.push_back(rcc_output_file);
          }
          if (!cmSystemTools::IsOn(sf->GetPropertyForUser("GENERATED"))) {
            if (qtMajorVersion == "5") {
              ListQt5RccInputs(sf, target, depends);
            } else {
              ListQt4RccInputs(sf, depends);
            }
#if defined(_WIN32) && !defined(__CYGWIN__)
            // Cannot use PRE_BUILD because the resource files themselves
            // may not be sources within the target so VS may not know the
            // target needs to re-build at all.
            usePRE_BUILD = false;
#endif
          }
        }
      }
    }
  }

#if defined(_WIN32) && !defined(__CYGWIN__)
  if (usePRE_BUILD) {
    // Add the pre-build command directly to bypass the OBJECT_LIBRARY
    // rejection in cmMakefile::AddCustomCommandToTarget because we know
    // PRE_BUILD will work for an OBJECT_LIBRARY in this specific case.
    std::vector<std::string> no_output;
    std::vector<std::string> no_byproducts;
    cmCustomCommand cc(makefile, no_output, no_byproducts, depends,
                       commandLines, autogenComment.c_str(),
                       workingDirectory.c_str());
    cc.SetEscapeOldStyle(false);
    cc.SetEscapeAllowMakeVars(true);
    target->Target->AddPreBuildCommand(cc);
  } else
#endif
  {
    cmTarget* autogenTarget = makefile->AddUtilityCommand(
      autogenTargetName, true, workingDirectory.c_str(),
      /*byproducts=*/rcc_output, depends, commandLines, false,
      autogenComment.c_str());

    cmGeneratorTarget* gt = new cmGeneratorTarget(autogenTarget, lg);
    lg->AddGeneratorTarget(gt);

    // Set target folder
    const char* autogenFolder =
      makefile->GetState()->GetGlobalProperty("AUTOMOC_TARGETS_FOLDER");
    if (!autogenFolder) {
      autogenFolder =
        makefile->GetState()->GetGlobalProperty("AUTOGEN_TARGETS_FOLDER");
    }
    if (autogenFolder && *autogenFolder) {
      autogenTarget->SetProperty("FOLDER", autogenFolder);
    } else {
      // inherit FOLDER property from target (#13688)
      copyTargetProperty(gt->Target, target->Target, "FOLDER");
    }

    target->Target->AddUtility(autogenTargetName);
  }
}

void cmQtAutoGeneratorInitializer::SetupAutoGenerateTarget(
  cmGeneratorTarget const* target)
{
  cmMakefile* makefile = target->Target->GetMakefile();

  // forget the variables added here afterwards again:
  cmMakefile::ScopePushPop varScope(makefile);
  static_cast<void>(varScope);

  // create a custom target for running generators at buildtime:
  std::string autogenTargetName = GetAutogenTargetName(target);

  makefile->AddDefinition(
    "_moc_target_name",
    cmOutputConverter::EscapeForCMake(autogenTargetName).c_str());
  makefile->AddDefinition(
    "_origin_target_name",
    cmOutputConverter::EscapeForCMake(target->GetName()).c_str());

  std::string targetDir = GetAutogenTargetDir(target);

  const char* qtVersion = makefile->GetDefinition("Qt5Core_VERSION_MAJOR");
  if (!qtVersion) {
    qtVersion = makefile->GetDefinition("QT_VERSION_MAJOR");
  }
  if (const char* targetQtVersion =
        target->GetLinkInterfaceDependentStringProperty("QT_MAJOR_VERSION",
                                                        "")) {
    qtVersion = targetQtVersion;
  }
  if (qtVersion) {
    makefile->AddDefinition("_target_qt_version", qtVersion);
  }

  std::vector<std::string> skipUic;
  std::vector<std::string> skipMoc;
  std::vector<std::string> mocSources;
  std::vector<std::string> mocHeaders;
  std::map<std::string, std::string> configIncludes;
  std::map<std::string, std::string> configDefines;
  std::map<std::string, std::string> configUicOptions;

  if (target->GetPropertyAsBool("AUTOMOC") ||
      target->GetPropertyAsBool("AUTOUIC") ||
      target->GetPropertyAsBool("AUTORCC")) {
    SetupSourceFiles(target, skipMoc, mocSources, mocHeaders, skipUic);
  }
  makefile->AddDefinition(
    "_cpp_files",
    cmOutputConverter::EscapeForCMake(cmJoin(mocSources, ";")).c_str());
  if (target->GetPropertyAsBool("AUTOMOC")) {
    SetupAutoMocTarget(target, autogenTargetName, skipMoc, mocHeaders,
                       configIncludes, configDefines);
  }
  if (target->GetPropertyAsBool("AUTOUIC")) {
    SetupAutoUicTarget(target, skipUic, configUicOptions);
  }
  if (target->GetPropertyAsBool("AUTORCC")) {
    SetupAutoRccTarget(target);
  }

  std::string inputFile = cmSystemTools::GetCMakeRoot();
  inputFile += "/Modules/AutogenInfo.cmake.in";
  std::string outputFile = targetDir;
  outputFile += "/AutogenInfo.cmake";
  makefile->AddDefinition(
    "_qt_rcc_inputs",
    makefile->GetDefinition("_qt_rcc_inputs_" + target->GetName()));
  makefile->ConfigureFile(inputFile.c_str(), outputFile.c_str(), false, true,
                          false);

  // Ensure we have write permission in case .in was read-only.
  mode_t perm = 0;
#if defined(_WIN32) && !defined(__CYGWIN__)
  mode_t mode_write = S_IWRITE;
#else
  mode_t mode_write = S_IWUSR;
#endif
  cmSystemTools::GetPermissions(outputFile, perm);
  if (!(perm & mode_write)) {
    cmSystemTools::SetPermissions(outputFile, perm | mode_write);
  }
  if (!configDefines.empty() || !configIncludes.empty() ||
      !configUicOptions.empty()) {
    cmsys::ofstream infoFile(outputFile.c_str(), std::ios::app);
    if (!infoFile) {
      std::string error = "Internal CMake error when trying to open file: ";
      error += outputFile;
      error += " for writing.";
      cmSystemTools::Error(error.c_str());
      return;
    }
    if (!configDefines.empty()) {
      for (std::map<std::string, std::string>::iterator
             it = configDefines.begin(),
             end = configDefines.end();
           it != end; ++it) {
        infoFile << "set(AM_MOC_COMPILE_DEFINITIONS_" << it->first << " "
                 << it->second << ")\n";
      }
    }
    if (!configIncludes.empty()) {
      for (std::map<std::string, std::string>::iterator
             it = configIncludes.begin(),
             end = configIncludes.end();
           it != end; ++it) {
        infoFile << "set(AM_MOC_INCLUDES_" << it->first << " " << it->second
                 << ")\n";
      }
    }
    if (!configUicOptions.empty()) {
      for (std::map<std::string, std::string>::iterator
             it = configUicOptions.begin(),
             end = configUicOptions.end();
           it != end; ++it) {
        infoFile << "set(AM_UIC_TARGET_OPTIONS_" << it->first << " "
                 << it->second << ")\n";
      }
    }
  }
}