/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying

   file LICENSE.rst or https://cmake.org/licensing for details.  */

#include "cmSiteNameCommand.h"

#include "cmsys/RegularExpression.hxx"

#include "cmExecutionStatus.h"

#include "cmMakefile.h"

#include "cmStateTypes.h"

#include "cmSystemTools.h"

#include "cmValue.h"

// cmSiteNameCommand

bool cmSiteNameCommand(std::vector<std::string> const& args,

                       cmExecutionStatus& status)

{

  if (args.size() != 1) {

    status.SetError("called with incorrect number of arguments");

    return false;

  }

  std::vector<std::string> paths;

  paths.emplace_back("/usr/bsd");

  paths.emplace_back("/usr/sbin");

  paths.emplace_back("/usr/bin");

  paths.emplace_back("/bin");

  paths.emplace_back("/sbin");

  paths.emplace_back("/usr/local/bin");

  cmValue cacheValue = status.GetMakefile().GetDefinition(args[0]);

  if (cacheValue) {

    return true;

  }

  cmValue temp = status.GetMakefile().GetDefinition("HOSTNAME");

  std::string hostname_cmd;

  if (temp) {

    hostname_cmd = *temp;

  } else {

    hostname_cmd = cmSystemTools::FindProgram("hostname", paths);

  }

  std::string siteName = "unknown";

#if defined(_WIN32) && !defined(__CYGWIN__)

  std::string host;

  if (cmSystemTools::ReadRegistryValue(

        "HKEY_LOCAL_MACHINE\\System\\CurrentControlSet\\"

        "Control\\ComputerName\\ComputerName;ComputerName",

        host)) {

    siteName = host;

  }

#else

  // try to find the hostname for this computer

  if (!cmIsOff(hostname_cmd)) {

    std::string host;

    cmSystemTools::RunSingleCommand(hostname_cmd, &host, nullptr, nullptr,

                                    nullptr, cmSystemTools::OUTPUT_NONE);

    // got the hostname

    if (!host.empty()) {

      // remove any white space from the host name

      std::string hostRegExp = "[ \t\n\r]*([^\t\n\r ]*)[ \t\n\r]*";

      cmsys::RegularExpression hostReg(hostRegExp.c_str());

      if (hostReg.find(host.c_str())) {

        // strip whitespace

        host = hostReg.match(1);

      }

      if (!host.empty()) {

        siteName = host;

      }

    }

  }

#endif

  status.GetMakefile().AddCacheDefinition(

    args[0], siteName, "Name of the computer/site where compile is being run",

    cmStateEnums::STRING);

  return true;

}