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Robust Services Core: Diplomacy Bot

Much of the software in the dip directory was evolved from the base software for developing Diplomacy bots found on the DAIDE (Diplomacy AI Development Environment) website. That software was refactored, decoupled from Windows (to run as a console application), and evolved to introduce C++11 capabilities.

The extras directory should give you an idea of the current state of this software. To build a bot that plays the game, derive from BaseBot and follow the instructions in BotType.h. If you simply build the software as is, it produces an observer bot that can join a game and report on its progress. Several files in the extras directory illustrate the output from this observer. All the games in that directory were played by instances of the impressive Albert bot:

  • A win by Turkey in a standard game.
  • A draw between England, France, and Austria in a fleet_rome game.
  • The first season of a classical game.

The last game is included because it is accompanied by a trace of the game's startup and initial season. This should give you an idea of the debugging capabilities available in RSC. The last thing in the extras directory is a Win32 debug executable of the observer bot (obsbot.exe). If you launch it with the -L3 option, it will capture the level of information shown in that trace. The trace is saved to a file using the >save command. CLI commands are documented here, but only those available in the NodeBase and NetworkBase namespaces are available to a bot. If you start it with -L2, the function trace is omitted. Launching with -L1 also omits socket events, leaving only the messages. Finally, launching with -L0 will capture no debug information.

Building the executable

To build the observer bot, or even subclass it to create a bot that plays the game, start with the instructions on the main page. However, the observer bot is not enabled in a default RSC build. But it is easy to target the build for a bot by modifying main as follows:

  • In the list of #include directives, comment out all ...Module.h entries and uncomment the one for DipModule.h.
  • In the list of using directives, comment out all of them and uncomment the one for namespace Diplomacy.
  • In the list of Singleton invocations, comment out all of them and uncomment the one for DipModule.
  • DAIDE Server 0.38, which can be downloaded from the DAIDE site, only supports IPv4, so change SysIpL2Addr::SupportsIPv6 to return false.

If you've already developed a bot, rebasing it onto RSC will require a bit of work because some of the interfaces have changed. However, it shouldn't prove too difficult. Note that only the software exercised by the observer bot has been tested; Adjudicator.cpp probably contains a few surprises at this stage.