docs: def pkg_upgrade(self):
          """Check and upgrade packages by repository
          """
          options = [
              "-c",
              "--check"
          ]
          flags = [
              "--upgrade",
              "--skip=",
              "--resolve-off",
              "--checklist",
              "--rebuild"
          ]
          flag, skip = self.__pkg_upgrade_flags(flags)
          if (len(self.args) == 3 and self.args[0] in options and
                  self.args[2] == flags[0] and
                  self.args[1] in self.meta.repositories):
              if self.args[1] not in ["slack", "sbo"]:
                  BinaryInstall(pkg_upgrade(self.args[1], skip, flag),
                                self.args[1], flag).start(is_upgrade=True)
              elif self.args[1] == "slack":
                  if self.meta.only_installed in ["on", "ON"]:
                      BinaryInstall(pkg_upgrade("slack", skip, flag),
                                    "slack", flag).start(is_upgrade=True)
                  else:
                      Patches(skip, flag).start()
              elif self.args[1] == "sbo":
                  SBoInstall(sbo_upgrade(skip, flag), flag).start(is_upgrade=True)
              else:
                  usage(self.args[1])
          elif len(self.args) == 2 and self.args[0] in options:
              if self.args[1] == "ALL":
                  Updates(repo="").ALL()
              else:
                  Updates(self.args[1]).run()
          elif (len(self.args) >= 2 and self.args[0] in options and
                  self.args[1] not in self.meta.repositories):
              usage(self.args[1])
          else:
              usage("")