docs: def pkg_list(self):
          """List of packages by repository
          """
          options = [
              "-l",
              "--list"
          ]
          flag = ["--index", "--installed", "--name"]
          name = INDEX = installed = False
          for arg in self.args[2:]:
              if flag[0] == arg:
                  INDEX = True
              if flag[1] in arg:
                  installed = True
              if flag[2] == arg:
                  name = True
              if arg not in flag:
                  usage("")
                  raise SystemExit()
          if (len(self.args) > 1 and len(self.args) <= 5 and
                  self.args[0] in options):
              if self.args[1] in self.meta.repositories:
                  PackageManager(binary=None).package_list(self.args[1],
                                                           name,
                                                           INDEX,
                                                           installed)
              else:
                  usage(self.args[1])
          else:
              usage("")