Method EnumerateAndChooseVSInstance

Source/cmVSSetupHelper.cxx:406–515

}

bool cmVSSetupAPIHelper::EnumerateAndChooseVSInstance()
{
  bool isVSInstanceExists = false;
  if (!chosenInstanceInfo.VSInstallLocation.empty()) {
    return true;
  }

  if (this->IsEWDKEnabled()) {
    std::string envWindowsSdkDir81;
    std::string envVSVersion;
    std::string envVsInstallDir;

    cmSystemTools::GetEnv("WindowsSdkDir_81", envWindowsSdkDir81);
    cmSystemTools::GetEnv("VisualStudioVersion", envVSVersion);
    cmSystemTools::GetEnv("VSINSTALLDIR", envVsInstallDir);
    if (envVSVersion.empty() || envVsInstallDir.empty()) {
      return false;
    }

    chosenInstanceInfo.VSInstallLocation = envVsInstallDir;
    chosenInstanceInfo.Version = envVSVersion;
    if (!LoadVSInstanceVCToolsetVersion(chosenInstanceInfo)) {
      return false;
    }
    chosenInstanceInfo.IsWin10SDKInstalled = true;
    chosenInstanceInfo.IsWin81SDKInstalled = !envWindowsSdkDir81.empty();
    return true;
  }

  std::string envVSCommonToolsDir;
  std::string envVSCommonToolsDirEnvName =
    cmStrCat("VS", this->Version, "0COMNTOOLS");

  if (cmSystemTools::GetEnv(envVSCommonToolsDirEnvName, envVSCommonToolsDir)) {
    cmSystemTools::ConvertToUnixSlashes(envVSCommonToolsDir);
  }

  bool specifiedLocationNotSpecifiedVersion = false;

  SmartCOMPtr<ISetupInstance> instance;

  std::vector<VSInstanceInfo> vecVSInstancesAll;

  // Enumerate VS instances with either COM interface or Vswhere
  if (!EnumerateVSInstancesWithCOM(vecVSInstancesAll) &&
      !EnumerateVSInstancesWithVswhere(vecVSInstancesAll) &&
      this->SpecifiedVSInstallLocation.empty()) {
    return false;
  }

  std::string const wantVersion = cmStrCat(this->Version, '.');

  std::vector<VSInstanceInfo> vecVSInstances;
  for (auto const& instanceInfo : vecVSInstancesAll) {
    // We are looking for a specific major version.
    if (instanceInfo.Version.size() < wantVersion.size() ||
        instanceInfo.Version.substr(0, wantVersion.size()) != wantVersion) {
      continue;