OpenSpiel cleanup: mark R-NaD, Go API, and Rust API as no longer main…

…tained. Leave the code in case anybody wants to use/see it.

Resolves: #1075, #1109, #1178, #1301.
PiperOrigin-RevId: 712500468
Change-Id: I4901e919de6337f7f1aeb7acb186075f49f96d14

docs/developer_guide.md

@@ -183,12 +183,11 @@ Leduc poker. We will use an example based on this
 
 ## Language APIs
 
-There are currently four other language APIs that expose functionality from the
-C++ core.
+There are four other language APIs that expose functionality from the C++ core.
 
 -   [Python](https://github.com/deepmind/open_spiel/tree/master/open_spiel/python).
 -   [Julia](https://github.com/deepmind/open_spiel/tree/master/open_spiel/julia)
 -   [Go](https://github.com/deepmind/open_spiel/tree/master/open_spiel/go)
-    (experimental)
+    (unmaintained)
 -   [Rust](https://github.com/deepmind/open_spiel/tree/master/open_spiel/rust)
-    (experimental)
+    (unmaintained)

open_spiel/CMakeLists.txt

@@ -107,8 +107,6 @@ endmacro()
 # List of all optional dependencies:
 openspiel_optional_dependency(OPEN_SPIEL_BUILD_WITH_ACPC           OFF
   "Build against the Universal Poker library.")
-openspiel_optional_dependency(OPEN_SPIEL_BUILD_WITH_GO             OFF
-  "Build with support for Golang API.")
 openspiel_optional_dependency(OPEN_SPIEL_BUILD_WITH_HANABI         OFF
   "Build against the Hanabi game.")
 openspiel_optional_dependency(OPEN_SPIEL_BUILD_WITH_JULIA          OFF
@@ -127,8 +125,6 @@ openspiel_optional_dependency(OPEN_SPIEL_BUILD_WITH_GAMUT          OFF
   "Build with GAMUT generator integration.")
 openspiel_optional_dependency(OPEN_SPIEL_BUILD_WITH_ORTOOLS        OFF
   "Build with C++ optimization library OR-Tools.")
-openspiel_optional_dependency(OPEN_SPIEL_BUILD_WITH_RUST           OFF
-  "Build with support for Rust API.")
 
 if (WIN32)
   openspiel_optional_dependency(OPEN_SPIEL_ENABLE_JAX              OFF
@@ -280,18 +276,6 @@ add_subdirectory (examples)
 add_subdirectory (games)
 add_subdirectory (game_transforms)
 
-if (OPEN_SPIEL_BUILD_WITH_GO)
-  message(WARNING
-    "GO API is disabled for now due to failing tests.\n"
-    "See https://github.com/google-deepmind/open_spiel/issues/1301."
-  )
-  # add_subdirectory(go)
-endif()
-
-if (OPEN_SPIEL_BUILD_WITH_RUST)
-  add_subdirectory(rust)
-endif()
-
 if (OPEN_SPIEL_BUILD_WITH_PYTHON)
   add_subdirectory (python)
 endif()

open_spiel/go/README.md

@@ -1,5 +1,9 @@
 # OpenSpiel Go API
 
+*Note:* This API has issues and is no longer maintained. See
+[issue 1301](https://github.com/google-deepmind/open_spiel/issues/1301) for
+details.
+
 This is a basic [Go](https://golang.org/) API for OpenSpiel. Please note that it
 is currently experimental and may not work as expected. Please see the
 [announcement thread](https://github.com/deepmind/open_spiel/issues/541) and

open_spiel/python/CMakeLists.txt

@@ -271,7 +271,6 @@ if (OPEN_SPIEL_ENABLE_JAX)
     jax/nfsp_jax_test.py
     jax/opponent_shaping_jax_test.py
     jax/policy_gradient_jax_test.py
-    algorithms/rnad/rnad_test.py
     coalitional_games/least_core_lagrangian_test.py
     mfg/algorithms/fictitious_play_test.py
   )

open_spiel/python/algorithms/rnad/README.md

@@ -1,3 +1,5 @@
+*Note:* This implementation is no longer maintained.
+
 This folder contains an single process implementation of [R-NaD]
 (https://arxiv.org/pdf/2206.15378.pdf)
 

open_spiel/rust/README.md

@@ -1,5 +1,7 @@
 # OpenSpiel Rust API
 
+*Note:* This API is no longer maintained.
+
 This is a basic [Rust](https://www.rust-lang.org/) API for OpenSpiel. Please
 note that it is currently experimental and may not work as expected. If you use
 it, please report any issues. Fixes and improvements are more than welcome!