CMake/Source/cmQtAutoGeneratorInitializer.cxx

/* 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 "cmFilePathChecksum.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 <map>
#include <set>
#include <sstream>
#include <string.h>
#include <string>
#include <sys/stat.h>
#include <utility>
#include <vector>

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

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

static std::string GetAutogenTargetFilesDir(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 += "/";
  return targetDir;
}

static std::string GetQtMajorVersion(cmGeneratorTarget const* target)
{
  cmMakefile* makefile = target->Target->GetMakefile();
  std::string qtMajorVersion = makefile->GetSafeDefinition("QT_VERSION_MAJOR");
  if (qtMajorVersion.empty()) {
    qtMajorVersion = makefile->GetSafeDefinition("Qt5Core_VERSION_MAJOR");
  }
  const char* targetQtVersion =
    target->GetLinkInterfaceDependentStringProperty("QT_MAJOR_VERSION", "");
  if (targetQtVersion != CM_NULLPTR) {
    qtMajorVersion = targetQtVersion;
  }
  return qtMajorVersion;
}

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;

  cmFilePathChecksum fpathCheckSum(makefile);
  for (std::vector<cmSourceFile*>::const_iterator fileIt = srcFiles.begin();
       fileIt != srcFiles.end(); ++fileIt) {
    cmSourceFile* sf = *fileIt;
    const std::string absFile =
      cmsys::SystemTools::GetRealPath(sf->GetFullPath());
    const std::string ext = sf->GetExtension();

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

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

        std::string rccOutputFile = GetAutogenTargetBuildDir(target);
        rccOutputFile += fpathCheckSum.getPart(absFile);
        rccOutputFile += "/qrc_";
        rccOutputFile +=
          cmsys::SystemTools::GetFilenameWithoutLastExtension(absFile);
        rccOutputFile += ".cpp";

        makefile->GetOrCreateSource(rccOutputFile, true);
        newRccFiles.push_back(rccOutputFile);

        // Create output directory
        cmSystemTools::MakeDirectory(
          cmsys::SystemTools::GetFilenamePath(rccOutputFile));
      }
    }

    if (!cmSystemTools::IsOn(sf->GetPropertyForUser("GENERATED"))) {
      if (cmSystemTools::IsOn(sf->GetPropertyForUser("SKIP_AUTOMOC"))) {
        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 MocSetupAutoTarget(
  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 UicGetOpts(cmGeneratorTarget const* target,
                       const std::string& config, std::string& optString)
{
  std::vector<std::string> opts;
  target->GetAutoUicOptions(opts, config);
  optString = cmJoin(opts, ";");
}

static void UicSetupAutoTarget(
  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);
  UicGetOpts(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;
    UicGetOpts(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 RccGetExecutable(cmGeneratorTarget const* target,
                                    const std::string& qtMajorVersion)
{
  cmLocalGenerator* lg = target->GetLocalGenerator();

  std::string const& targetName = target->GetName();
  if (qtMajorVersion == "5") {
    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 (qtMajorVersion == "4") {
    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 RccMergeOptions(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());
}

/// @brief Reads the resource files list from from a .qrc file - Qt5 version
/// @return True if the .qrc file was successfully parsed
static bool RccListInputsQt5(cmSourceFile* sf, cmGeneratorTarget const* target,
                             std::vector<std::string>& depends)
{
  const std::string rccCommand = RccGetExecutable(target, "5");
  if (rccCommand.empty()) {
    cmSystemTools::Error("AUTOGEN: error: rcc executable not available\n");
    return false;
  }

  bool hasDashDashList = false;
  // Read rcc features
  {
    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;
    }
  }
  // Run rcc list command
  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;
    cmSystemTools::Error(err.str().c_str());
    return false;
  }

  // Parse rcc list output
  {
    std::istringstream ostr(rccStdOut);
    std::string oline;
    while (std::getline(ostr, oline)) {
      oline = utilStripCR(oline);
      if (!oline.empty()) {
        depends.push_back(oline);
      }
    }
  }

  {
    std::istringstream estr(rccStdErr);
    std::string eline;
    while (std::getline(estr, eline)) {
      eline = utilStripCR(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;
          cmSystemTools::Error(err.str().c_str());
          return false;
        }
        pos += searchString.length();
        std::string::size_type sz = eline.size() - pos - 1;
        depends.push_back(eline.substr(pos, sz));
      }
    }
  }

  return true;
}

/// @brief Reads the resource files list from from a .qrc file - Qt4 version
/// @return True if the .qrc file was successfully parsed
static bool RccListInputsQt4(cmSourceFile* sf,
                             std::vector<std::string>& depends)
{
  // Read file into string
  std::string qrcContents;
  {
    std::ostringstream stream;
    stream << cmsys::ifstream(sf->GetFullPath().c_str()).rdbuf();
    qrcContents = stream.str();
  }

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

  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;
    }

    depends.push_back(qrcEntry);
  }
  return true;
}

/// @brief Reads the resource files list from from a .qrc file
/// @return True if the rcc file was successfully parsed
static bool RccListInputs(const std::string& qtMajorVersion, cmSourceFile* sf,
                          cmGeneratorTarget const* target,
                          std::vector<std::string>& depends)
{
  if (qtMajorVersion == "5") {
    return RccListInputsQt5(sf, target, depends);
  }
  return RccListInputsQt4(sf, depends);
}

static void RccSetupAutoTarget(cmGeneratorTarget const* target,
                               const std::string& qtMajorVersion)
{
  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 bool qtMajorVersion5 = (qtMajorVersion == "5");

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

  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);
          RccMergeOptions(rccOptions, optsVec, qtMajorVersion5);
        }

        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::string entriesList;
        if (!cmSystemTools::IsOn(sf->GetPropertyForUser("GENERATED"))) {
          std::vector<std::string> depends;
          if (RccListInputs(qtMajorVersion, sf, target, depends)) {
            entriesList = cmJoin(depends, "@list_sep@");
          } else {
            return;
          }
        }
        qrcInputs += qrcInputsSep;
        qrcInputs += entriesList;
        qrcInputsSep = ";";
      }
    }
  }
  makefile->AddDefinition(
    "_rcc_inputs", cmOutputConverter::EscapeForCMake(qrcInputs).c_str());
  makefile->AddDefinition(
    "_rcc_files", cmOutputConverter::EscapeForCMake(_rcc_files).c_str());
  makefile->AddDefinition(
    "_rcc_options_files",
    cmOutputConverter::EscapeForCMake(rccFileFiles).c_str());
  makefile->AddDefinition(
    "_rcc_options_options",
    cmOutputConverter::EscapeForCMake(rccFileOptions).c_str());
  makefile->AddDefinition("_qt_rcc_executable",
                          RccGetExecutable(target, qtMajorVersion).c_str());
}

void cmQtAutoGeneratorInitializer::InitializeAutogenSources(
  cmGeneratorTarget* target)
{
  if (target->GetPropertyAsBool("AUTOMOC")) {
    cmMakefile* makefile = target->Target->GetMakefile();
    const std::string mocCppFile =
      GetAutogenTargetBuildDir(target) + "moc_compilation.cpp";
    makefile->GetOrCreateSource(mocCppFile, true);
    target->AddSource(mocCppFile);
  }
}

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

  // Create a custom target for running generators at buildtime
  const std::string autogenTargetName = GetAutogenTargetName(target);
  const std::string autogenBuildDir = GetAutogenTargetBuildDir(target);
  const std::string workingDirectory =
    cmSystemTools::CollapseFullPath("", makefile->GetCurrentBinaryDirectory());
  const std::string qtMajorVersion = GetQtMajorVersion(target);

  // Create autogen target build directory
  cmSystemTools::MakeDirectory(autogenBuildDir);
  // Remove entire autogen build directory on clean
  makefile->AppendProperty("ADDITIONAL_MAKE_CLEAN_FILES",
                           autogenBuildDir.c_str(), false);

  // Create autogen target includes directory and
  // add it to the origin target INCLUDE_DIRECTORIES
  if (target->GetPropertyAsBool("AUTOMOC") ||
      target->GetPropertyAsBool("AUTOUIC")) {
    const std::string incsDir = autogenBuildDir + "include";
    cmSystemTools::MakeDirectory(incsDir);
    target->AddIncludeDirectory(incsDir, true);
  }

  // Initialize autogen target dependencies
  std::vector<std::string> depends;
  if (const char* autogenDepends =
        target->GetProperty("AUTOGEN_TARGET_DEPENDS")) {
    cmSystemTools::ExpandListArgument(autogenDepends, depends);
  }

  // Compose command lines
  cmCustomCommandLines commandLines;
  {
    cmCustomCommandLine currentLine;
    currentLine.push_back(cmSystemTools::GetCMakeCommand());
    currentLine.push_back("-E");
    currentLine.push_back("cmake_autogen");
    currentLine.push_back(GetAutogenTargetFilesDir(target));
    currentLine.push_back("$<CONFIGURATION>");
    commandLines.push_back(currentLine);
  }

  // Compose target comment
  std::string autogenComment;
  {
    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];
    }
    autogenComment = "Automatic " + tools + " for target " + 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) {
      // If the autogen target depends on an other target
      // don't use PRE_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
      ) {
    if (target->GetPropertyAsBool("AUTORCC")) {
      cmFilePathChecksum fpathCheckSum(makefile);
      std::vector<cmSourceFile*> srcFiles;
      target->GetConfigCommonSourceFiles(srcFiles);
      for (std::vector<cmSourceFile*>::const_iterator fileIt =
             srcFiles.begin();
           fileIt != srcFiles.end(); ++fileIt) {
        cmSourceFile* sf = *fileIt;
        if (sf->GetExtension() == "qrc" &&
            !cmSystemTools::IsOn(sf->GetPropertyForUser("SKIP_AUTORCC"))) {
          {
            const std::string absFile =
              cmsys::SystemTools::GetRealPath(sf->GetFullPath());

            std::string rccOutputFile = GetAutogenTargetBuildDir(target);
            rccOutputFile += fpathCheckSum.getPart(absFile);
            rccOutputFile += "/qrc_";
            rccOutputFile +=
              cmsys::SystemTools::GetFilenameWithoutLastExtension(absFile);
            rccOutputFile += ".cpp";
            rcc_output.push_back(rccOutputFile);
            // Create output directory
            cmSystemTools::MakeDirectory(
              cmsys::SystemTools::GetFilenamePath(rccOutputFile));
          }
          if (!cmSystemTools::IsOn(sf->GetPropertyForUser("GENERATED"))) {
            RccListInputs(qtMajorVersion, sf, target, 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)
      utilCopyTargetProperty(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:
  const std::string autogenTargetName = GetAutogenTargetName(target);
  const std::string qtMajorVersion = GetQtMajorVersion(target);

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

  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> configMocIncludes;
  std::map<std::string, std::string> configMocDefines;
  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")) {
    MocSetupAutoTarget(target, autogenTargetName, skipMoc, mocHeaders,
                       configMocIncludes, configMocDefines);
  }
  if (target->GetPropertyAsBool("AUTOUIC")) {
    UicSetupAutoTarget(target, skipUic, configUicOptions);
  }
  if (target->GetPropertyAsBool("AUTORCC")) {
    RccSetupAutoTarget(target, qtMajorVersion);
  }

  // Generate config file
  std::string inputFile = cmSystemTools::GetCMakeRoot();
  inputFile += "/Modules/AutogenInfo.cmake.in";
  std::string outputFile = GetAutogenTargetFilesDir(target);
  outputFile += "/AutogenInfo.cmake";

  makefile->ConfigureFile(inputFile.c_str(), outputFile.c_str(), false, true,
                          false);

  // Append custom definitions to config file
  if (!configMocDefines.empty() || !configMocIncludes.empty() ||
      !configUicOptions.empty()) {

    // 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);
    }

    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 (!configMocDefines.empty()) {
      for (std::map<std::string, std::string>::iterator
             it = configMocDefines.begin(),
             end = configMocDefines.end();
           it != end; ++it) {
        infoFile << "set(AM_MOC_COMPILE_DEFINITIONS_" << it->first << " "
                 << it->second << ")\n";
      }
    }
    if (!configMocIncludes.empty()) {
      for (std::map<std::string, std::string>::iterator
             it = configMocIncludes.begin(),
             end = configMocIncludes.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";
      }
    }
  }
}