Method BuildCommandLine

Source/cmLocalNinjaGenerator.cxx:499–571

#endif

std::string cmLocalNinjaGenerator::BuildCommandLine(
  std::vector<std::string> const& cmdLines, std::string const& outputConfig,
  std::string const& commandConfig, std::string const& customStep,
  cmGeneratorTarget const* target) const
{
  // If we have no commands but we need to build a command anyway, use noop.
  // This happens when building a POST_BUILD value for link targets that
  // don't use POST_BUILD.
  if (cmdLines.empty()) {
    return cmGlobalNinjaGenerator::SHELL_NOOP;
  }

  // If this is a custom step then we will have no '$VAR' ninja placeholders.
  // This means we can deal with long command sequences by writing to a script.
  // Do this if the command lines are on the scale of the OS limit.
  if (!customStep.empty()) {
    size_t cmdLinesTotal = 0;
    for (std::string const& cmd : cmdLines) {
      cmdLinesTotal += cmd.length() + 6;
    }
    if (cmdLinesTotal > cmSystemTools::CalculateCommandLineLengthLimit() / 2) {
      std::string const scriptPath = this->WriteCommandScript(
        cmdLines, outputConfig, commandConfig, customStep, target);
      std::string cmd
#ifndef _WIN32
        = "/bin/sh "
#endif
        ;
      cmd += this->ConvertToOutputFormat(
        this->GetGlobalNinjaGenerator()->ConvertToNinjaPath(scriptPath),
        cmOutputConverter::SHELL);

      // Add an unused argument based on script content so that Ninja
      // knows when the command lines change.
      cmd += " ";
      cmCryptoHash hash(cmCryptoHash::AlgoSHA256);
      cmd += hash.HashFile(scriptPath).substr(0, 16);
      return cmd;
    }
  }

  std::ostringstream cmd;
#ifdef _WIN32
  cmGlobalNinjaGenerator const* gg = this->GetGlobalNinjaGenerator();
  bool const needCMD =
    cmdLines.size() > 1 || (customStep.empty() && RuleNeedsCMD(cmdLines[0]));
  for (auto li = cmdLines.begin(); li != cmdLines.end(); ++li) {
    if (li != cmdLines.begin()) {
      cmd << " && ";
    } else if (needCMD) {
      cmd << gg->GetComspec() << " /C \"";
    }
    // Put current cmdLine in brackets if it contains "||" because it has
    // higher precedence than "&&" in cmd.exe
    if (li->find("||") != std::string::npos) {
      cmd << "( " << *li << " )";
    } else {
      cmd << *li;