Function ReadPackage

Source/cmCMakePkgConfigCommand.cxx:469–552

}

cm::optional<cmPkgConfigResult> ReadPackage(std::string const& package,
                                            ImportEnv& imEnv,
                                            cmPkgConfigEnv& pcEnv)
{
  cm::optional<cmPkgConfigResult> result;
  cm::filesystem::path path{ package };

  if (path.extension() == ".pc") {
    if (!cmSystemTools::FileExists(path.string())) {
      return result;
    }
  } else {

    if (pcEnv.DisableUninstalled && !*pcEnv.DisableUninstalled) {
      auto uninstalled = path;
      uninstalled.concat("-uninstalled.pc");
      uninstalled =
        cmSystemTools::FindFile(uninstalled.string(), pcEnv.search, true);
      if (uninstalled.empty()) {
        path = cmSystemTools::FindFile(path.concat(".pc").string(),
                                       pcEnv.search, true);
        if (path.empty()) {
          return result;
        }
      } else {
        path = uninstalled;
      }
    } else {
      path = cmSystemTools::FindFile(path.concat(".pc").string(), pcEnv.search,
                                     true);
      if (path.empty()) {
        return result;
      }
    }
  }

  auto len = cmSystemTools::FileLength(path.string());

  // Windows requires this weird string -> c_str dance
  cmsys::ifstream ifs(path.string().c_str(), std::ios::binary);

  if (!ifs) {
    warn_or_error(cmStrCat("Could not open file '", path.string(), '\''),
                  imEnv);
    return result;
  }

  std::unique_ptr<char[]> buf(new char[len]);
  ifs.read(buf.get(), len);

  // Shouldn't have hit eof on previous read, should hit eof now
  if (ifs.fail() || ifs.eof() || ifs.get() != EOF) {
    warn_or_error(cmStrCat("Error while reading file '", path.string(), '\''),
                  imEnv);
    return result;
  }

  using StrictnessType = CommonArguments::StrictnessType;