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

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

#include "cmWriteFileCommand.h"

#include "cmsys/FStream.hxx"

#include "cm_sys_stat.h"

#include "cmDiagnostics.h"

#include "cmExecutionStatus.h"

#include "cmMakefile.h"

#include "cmStringAlgorithms.h"

#include "cmSystemTools.h"

// cmLibraryCommand

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

                        cmExecutionStatus& status)

{

  cmMakefile& mf = status.GetMakefile();

  mf.IssueDiagnostic(cmDiagnostics::CMD_DEPRECATED,

                     "The 'write_file' command has been superseded. "

                     "Use 'file(WRITE)' instead.");

  if (args.size() < 2) {

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

    return false;

  }

  std::string message;

  auto i = args.begin();

  std::string const& fileName = *i;

  bool overwrite = true;

  i++;

  for (; i != args.end(); ++i) {

    if (*i == "APPEND") {

      overwrite = false;

    } else {

      message += *i;

    }

  }

  if (!mf.CanIWriteThisFile(fileName)) {

    status.SetError(cmStrCat("attempted to write a file: ", fileName,

                             " into a source directory."));

    cmSystemTools::SetFatalErrorOccurred();

    return false;

  }

  std::string dir = cmSystemTools::GetFilenamePath(fileName);

  cmSystemTools::MakeDirectory(dir);

  mode_t mode = 0;

  bool writable = false;

  // Set permissions to writable

  if (cmSystemTools::GetPermissions(fileName.c_str(), mode)) {

#if defined(_MSC_VER) || defined(__MINGW32__)

    writable = (mode & S_IWRITE) != 0;

    mode_t newMode = mode | S_IWRITE;

#else

    writable = mode & S_IWUSR;

    mode_t newMode = mode | S_IWUSR | S_IWGRP;

#endif

    if (!writable) {

      cmSystemTools::SetPermissions(fileName.c_str(), newMode);

    }

  }

  // If GetPermissions fails, pretend like it is ok. File open will fail if

  // the file is not writable

  cmsys::ofstream file(fileName.c_str(),

                       overwrite ? std::ios::out : std::ios::app);

  if (!file) {

    status.SetError(cmStrCat("Internal CMake error when trying to open file: ",

                             fileName, " for writing."));

    return false;

  }

  file << message << '\n';

  file.close();

  if (mode && !writable) {

    cmSystemTools::SetPermissions(fileName.c_str(), mode);

  }

  return true;

}