mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-09-21 08:58:04 +03:00
60 lines
1.3 KiB
C++
60 lines
1.3 KiB
C++
#pragma once
|
||
|
||
#include "args.hh"
|
||
|
||
namespace nix {
|
||
|
||
/* A command is an argument parser that can be executed by calling its
|
||
run() method. */
|
||
struct Command : virtual Args
|
||
{
|
||
virtual std::string name() = 0;
|
||
virtual void prepare() { };
|
||
virtual void run() = 0;
|
||
};
|
||
|
||
class Store;
|
||
|
||
/* A command that require a Nix store. */
|
||
struct StoreCommand : virtual Command
|
||
{
|
||
std::string storeUri;
|
||
StoreCommand();
|
||
void run() override;
|
||
virtual void run(ref<Store>) = 0;
|
||
};
|
||
|
||
typedef std::map<std::string, ref<Command>> Commands;
|
||
|
||
/* An argument parser that supports multiple subcommands,
|
||
i.e. ‘<command> <subcommand>’. */
|
||
class MultiCommand : virtual Args
|
||
{
|
||
public:
|
||
Commands commands;
|
||
|
||
std::shared_ptr<Command> command;
|
||
|
||
MultiCommand(const Commands & commands);
|
||
|
||
void printHelp(const string & programName, std::ostream & out) override;
|
||
|
||
bool processFlag(Strings::iterator & pos, Strings::iterator end) override;
|
||
|
||
bool processArgs(const Strings & args, bool finish) override;
|
||
};
|
||
|
||
/* A helper class for registering commands globally. */
|
||
struct RegisterCommand
|
||
{
|
||
static Commands * commands;
|
||
|
||
RegisterCommand(ref<Command> command)
|
||
{
|
||
if (!commands) commands = new Commands;
|
||
commands->emplace(command->name(), command);
|
||
}
|
||
};
|
||
|
||
}
|