ceph/src/tools/rbd/Shell.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #ifndef CEPH_RBD_SHELL_H
   5 #define CEPH_RBD_SHELL_H
   6
   7 #include "include/int_types.h"
   8 #include <set>
   9 #include <string>
  10 #include <vector>
  11 #include <boost/program_options.hpp>
  12
  13 namespace rbd {
  14
  15 class Shell {
  16 public:
  17   typedef std::vector<const char *> Arguments;
  18   typedef std::vector<std::string> CommandSpec;
  19
  20   struct Action {
  21     typedef void (*GetArguments)(boost::program_options::options_description *,
  22                                  boost::program_options::options_description *);
  23     typedef int (*Execute)(const boost::program_options::variables_map &);
  24
  25     CommandSpec command_spec;
  26     CommandSpec alias_command_spec;
  27     const std::string description;
  28     const std::string help;
  29     GetArguments get_arguments;
  30     Execute execute;
  31     bool visible;
  32
  33     template <typename Args, typename Execute>
  34     Action(const std::initializer_list<std::string> &command_spec,
  35            const std::initializer_list<std::string> &alias_command_spec,
  36            const std::string &description, const std::string &help,
  37            Args args, Execute execute, bool visible = true)
  38         : command_spec(command_spec), alias_command_spec(alias_command_spec),
  39           description(description), help(help), get_arguments(args),
  40           execute(execute), visible(visible) {
  41       Shell::get_actions().push_back(this);
  42     }
  43
  44   };
  45
  46   struct SwitchArguments {
  47     SwitchArguments(const std::initializer_list<std::string> &arguments) {
  48       Shell::get_switch_arguments().insert(arguments.begin(), arguments.end());
  49     }
  50   };
  51
  52   int execute(const Arguments &argument);
  53
  54 private:
  55   static std::vector<Action *>& get_actions();
  56   static std::set<std::string>& get_switch_arguments();
  57
  58   void get_command_spec(const std::vector<std::string> &arguments,
  59                         std::vector<std::string> *command_spec);
  60   Action *find_action(const CommandSpec &command_spec,
  61                       CommandSpec **matching_spec, bool *is_alias);
  62
  63   void get_global_options(boost::program_options::options_description *opts);
  64
  65   void print_help();
  66   void print_action_help(Action *action, bool is_alias);
  67   void print_unknown_action(const CommandSpec &command_spec);
  68
  69   void print_bash_completion(const CommandSpec &command_spec);
  70   void print_bash_completion_options(
  71     const boost::program_options::options_description &ops);
  72 };
  73
  74 } // namespace rbd
  75
  76 #endif // CEPH_RBD_SHELL_H