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

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

#include "cmBinUtilsMacOSMachOOToolGetRuntimeDependenciesTool.h"

#include <sstream>

#include <vector>

#include <cmsys/RegularExpression.hxx>

#include "cmRuntimeDependencyArchive.h"

#include "cmUVProcessChain.h"

#include "cmUVStream.h"

cmBinUtilsMacOSMachOOToolGetRuntimeDependenciesTool::

  cmBinUtilsMacOSMachOOToolGetRuntimeDependenciesTool(

    cmRuntimeDependencyArchive* archive)

  : cmBinUtilsMacOSMachOGetRuntimeDependenciesTool(archive)

{

}

bool cmBinUtilsMacOSMachOOToolGetRuntimeDependenciesTool::GetFileInfo(

  std::string const& file, std::vector<std::string>& libs,

  std::vector<std::string>& rpaths)

{

  std::vector<std::string> command;

  if (!this->Archive->GetGetRuntimeDependenciesCommand("otool", command)) {

    this->SetError("Could not find otool");

    return false;

  }

  command.emplace_back("-l");

  command.emplace_back(file);

  cmUVProcessChainBuilder builder;

  builder.SetBuiltinStream(cmUVProcessChainBuilder::Stream_OUTPUT)

    .AddCommand(command);

  auto process = builder.Start();

  if (!process.Valid() || process.GetStatus(0).SpawnResult != 0) {

    std::ostringstream e;

    e << "Failed to start otool process for:\n  " << file;

    this->SetError(e.str());

    return false;

  }

  std::string line;

  static cmsys::RegularExpression const rpathRegex("^ *cmd LC_RPATH$");

  static cmsys::RegularExpression const loadDylibRegex(

    "^ *cmd LC_LOAD(_WEAK)?_DYLIB$");

  static cmsys::RegularExpression const pathRegex(

    "^ *path (.*) \\(offset [0-9]+\\)$");

  static cmsys::RegularExpression const nameRegex(

    "^ *name (.*) \\(offset [0-9]+\\)$");

  cmUVIStream output(process.OutputStream());

  while (std::getline(output, line)) {

    cmsys::RegularExpressionMatch cmdMatch;

    if (rpathRegex.find(line.c_str(), cmdMatch)) {

      // NOLINTNEXTLINE(misc-redundant-expression)

      if (!std::getline(output, line) || !std::getline(output, line)) {

        this->SetError("Invalid output from otool");

        return false;

      }

      cmsys::RegularExpressionMatch pathMatch;

      if (pathRegex.find(line.c_str(), pathMatch)) {

        rpaths.push_back(pathMatch.match(1));

      } else {

        this->SetError("Invalid output from otool");

        return false;

      }

    } else if (loadDylibRegex.find(line.c_str(), cmdMatch)) {

      // NOLINTNEXTLINE(misc-redundant-expression)

      if (!std::getline(output, line) || !std::getline(output, line)) {

        this->SetError("Invalid output from otool");

        return false;

      }

      cmsys::RegularExpressionMatch nameMatch;

      if (nameRegex.find(line.c_str(), nameMatch)) {

        libs.push_back(nameMatch.match(1));

      } else {

        this->SetError("Invalid output from otool");

        return false;

      }

    }

  }

  if (!process.Wait()) {

    std::ostringstream e;

    e << "Failed to wait on otool process for:\n  " << file;

    this->SetError(e.str());

    return false;

  }

  if (process.GetStatus(0).ExitStatus != 0) {

    std::ostringstream e;

    e << "Failed to run otool on:\n  " << file;

    this->SetError(e.str());

    return false;

  }

  return true;

}