chore: make games dependant on feature

Cargo.toml

@@ -10,7 +10,26 @@ categories = ["algorithms", "games"]
 repository = "https://github.com/KarelPeeters/board-game-rs"
 
 [features]
-default = []
+game_chess = ["dep:chess"]
+game_arimaa = ["dep:arimaa_engine_step", "dep:once_cell"]
+game_sttt = []
+game_ttt = []
+game_ataxx = []
+game_oware = []
+game_connect4 = []
+game_go = ["dep:nohash-hasher", "dep:static_assertions", "dep:lazy_static"]
+game_all = [
+    "game_chess",
+    "game_arimaa",
+    "game_sttt",
+    "game_ttt",
+    "game_ataxx",
+    "game_go",
+    "game_oware",
+    "game_connect4",
+]
+
+default = ["game_all"]
 
 [dependencies]
 rand = { version = "0.8.5", features = ["small_rng"] }
@@ -25,13 +44,12 @@ num_cpus = "1.15.0"
 
 # TODO the chess crate is heavy (and takes a long time to build, see below "temp fix"), maybe replace it with
 #  cozy-chess or shakmaty
-chess = "3.2.0"
-# TODO make arimaa optional with a feature
-arimaa_engine_step = { version = "1.0.1" } # , path = "../arimaa-engine-step"
-once_cell = "1.18.0"
-lazy_static = "1.4.0"
-static_assertions = "1.1.0"
-nohash-hasher = "0.2.0"
+chess = { version = "3.2.0", optional = true }
+arimaa_engine_step = { version = "1.0.1", optional = true } # , path = "../arimaa-engine-step"
+once_cell = { version = "1.18.0", optional = true }
+lazy_static = { version = "1.4.0", optional = true }
+static_assertions = { version = "1.1.0", optional = true }
+nohash-hasher = { version = "0.2.0", optional = true }
 
 # temporary fix until https://github.com/jordanbray/chess/pull/67 is merged
 [profile.dev.build-override]
@@ -47,3 +65,11 @@ debug = true
 [profile.release-with-debug]
 inherits = "release"
 debug = true
+
+[[bin]]
+name = "bench"
+required-features = ["game_ataxx", "game_chess", "game_sttt"]
+
+[[bin]]
+name = "go_split_perft"
+required-features = ["game_go"]

src/ai/mcts.rs

@@ -365,6 +365,7 @@ pub fn mcts_build_tree<B: AltBoard>(
     let mut tree = Tree::new(root_board.clone());
 
     let root_outcome = root_board.outcome().map(|o| o.pov(root_board.next_player().other()));
+
     tree.nodes.push(Node::new(None, root_outcome));
 
     for _ in 0..iterations {

src/bin/bench.rs

@@ -2,14 +2,13 @@
 
 use std::time::Instant;
 
-use itertools::Itertools;
-use rand::rngs::SmallRng;
-use rand::SeedableRng;
-
 use board_game::ai::mcts::mcts_build_tree;
 use board_game::games::ataxx::AtaxxBoard;
 use board_game::games::chess::ChessBoard;
 use board_game::games::sttt::STTTBoard;
+use itertools::Itertools;
+use rand::rngs::SmallRng;
+use rand::SeedableRng;
 
 fn main() {
     bench("mcts_sttt", || {

src/games/mod.rs

@@ -1,10 +1,18 @@
+#[cfg(feature = "game_arimaa")]
 pub mod arimaa;
+#[cfg(feature = "game_ataxx")]
 pub mod ataxx;
+#[cfg(feature = "game_chess")]
 pub mod chess;
+#[cfg(feature = "game_connect4")]
 pub mod connect4;
+#[cfg(feature = "game_go")]
 pub mod go;
+#[cfg(feature = "game_oware")]
 pub mod oware;
+#[cfg(feature = "game_sttt")]
 pub mod sttt;
+#[cfg(feature = "game_ttt")]
 pub mod ttt;
 
 pub mod dummy;

src/heuristic/mod.rs

@@ -1,3 +1,6 @@
+#[cfg(feature = "game_ataxx")]
 pub mod ataxx;
+#[cfg(feature = "game_chess")]
 pub mod chess;
+#[cfg(feature = "game_sttt")]
 pub mod sttt;

src/interface/mod.rs

@@ -1,3 +1,6 @@
+#[cfg(feature = "game_arimaa")]
 pub mod aei;
+#[cfg(feature = "game_go")]
 pub mod gtp;
+#[cfg(feature = "game_ataxx")]
 pub mod uai;

src/lib.rs

@@ -53,10 +53,13 @@
 //! ## List the available moves on a board and play a random one.
 //!
 //! ```
+//! # #[cfg(feature = "game_ataxx")]
 //! # use board_game::games::ataxx::AtaxxBoard;
 //! # use board_game::board::{BoardMoves, Board};
 //! # use internal_iterator::InternalIterator;
 //! # let mut rng = rand::thread_rng();
+//! # #[cfg(feature = "game_ataxx")]
+//! # {
 //! let mut board = AtaxxBoard::default();
 //! println!("{}", board);
 //!
@@ -68,24 +71,33 @@
 //! println!("Picked move {:?}", mv);
 //! board.play(mv).unwrap();
 //! println!("{}", board);
+//! # }
 //! ```
 //!
 //! ## Get the best move according to MCTS
 //!
 //! ```
 //! # use board_game::ai::mcts::MCTSBot;
+//! # #[cfg(feature = "game_ataxx")]
 //! # use board_game::games::ataxx::AtaxxBoard;
 //! # use board_game::ai::Bot;
 //! # use rand::thread_rng;
+//! # #[cfg(feature = "game_ataxx")]
+//! # {
 //! let board = AtaxxBoard::default();
 //! println!("{}", board);
 //!
 //! let mut bot = MCTSBot::new(1000, 2.0, thread_rng());
 //! println!("{:?}", bot.select_move(&board))
+//! # }
 //! ```
 
 // export used game crates
+
+#[cfg(feature = "game_arimaa")]
 pub use arimaa_engine_step;
+
+#[cfg(feature = "game_chess")]
 pub use chess;
 
 pub mod board;
@@ -95,7 +107,9 @@ pub mod pov;
 pub mod wdl;
 
 pub mod ai;
+
 pub mod games;
+
 pub mod heuristic;
 
 pub mod util;

tests/board/mod.rs

@@ -14,15 +14,26 @@ use board_game::util::tiny::consistent_rng;
 
 use crate::util::test_sampler_uniform;
 
+#[cfg(feature = "game_arimaa")]
 mod arimaa;
+#[cfg(feature = "game_ataxx")]
 mod ataxx;
+#[cfg(feature = "game_chess")]
 mod chess;
+#[cfg(feature = "game_connect4")]
 mod connect4;
+#[cfg(feature = "game_go")]
 mod go;
+#[cfg(feature = "game_go")]
 mod go_chains;
+
 mod max_moves;
+
+#[cfg(feature = "game_oware")]
 mod oware;
+#[cfg(feature = "game_sttt")]
 mod sttt;
+#[cfg(feature = "game_ttt")]
 mod ttt;
 
 // TODO add test for symmetry after playing moves