Implement simplesquirrel library to replace Miniswig wrapper genera…

…tion (#71)

Implement `simplesquirrel` library to replace Miniswig wrapper generation

The `simplesquirrel` library is a simple binding to Squirrel in C++11.

It allows Brux to easily bind its API functions, each with a single line of code, removing the need for wrapper generation and the various inconveniences around it - everything is done from the code in "src/brux". Since there is no longer any wrapper generation, the "src/api" and "src/squirrel" directories have been deleted.

Additionally, `simplesquirrel` also provides handy wrappers across all types of Squirrel objects and a lot of general functions, which have been utilized in some places here.

Closes #66.

* Update simplesquirrel

* GitHub workflows: Recursively fetch submodules

Allows for fetching the required Squirrel submodule, contained in the simplesquirrel submodule.

* Add simplesquirrel Squirrel include dir patch

* Fix illegal token error with `std::min` and `std::max`

* Fix Squirrel linking issue in `simplesquirrel`

* Update `simplesquirrel`

* Revert copyright header change

Don't know why I did this.

.github/workflows/gnu_linux.yml

@@ -30,7 +30,7 @@ jobs:
         uses: actions/checkout@v3
         with:
           fetch-depth: 1
-          submodules: true
+          submodules: recursive
 
       - name: Install 32-bit dependencies
         if: ${{ matrix.arch == 32 }}

.github/workflows/windows.yml

@@ -30,7 +30,7 @@ jobs:
         uses: actions/checkout@v3
         with:
           fetch-depth: 1
-          submodules: true
+          submodules: recursive
 
       - name: Use cached dependencies
         id: cache-dependencies

.gitmodules

@@ -1,9 +1,6 @@
-[submodule "rte/external/miniswig"]
-	path = rte/external/miniswig
-	url = https://github.com/WindstilleTeam/miniswig
-[submodule "rte/external/squirrel"]
-	path = rte/external/squirrel
-	url = https://github.com/albertodemichelis/squirrel.git
 [submodule "rte/external/physfs"]
 	path = rte/external/physfs
 	url = https://github.com/icculus/physfs
+[submodule "rte/external/simplesquirrel"]
+	path = rte/external/simplesquirrel
+	url = https://github.com/SuperTux/simplesquirrel

rte/CMakeLists.txt

@@ -30,12 +30,6 @@ if (USE_SDL2_MIXER)
   option(USE_FASTFILL "Use an O(1) algorithm for replacing unloaded sounds with new sounds instead of the original O(n) algorithm" ON)
 endif()
 
-if (USE_SDL2_MIXER)
-  set(AUDIO_SOURCE src/audio/audio_sdl2.cpp)
-else()
-  set(AUDIO_SOURCE src/audio/audio_none.cpp)
-endif()
-
 # preprocess config.hpp, used for optional libraries
 
 configure_file(src/config.hpp.in config.hpp)
@@ -73,8 +67,9 @@ find_package(SDL2 REQUIRED)
 find_package(SDL2_image REQUIRED)
 find_package(SDL2_gfx REQUIRED)
 
+add_subdirectory("${CMAKE_SOURCE_DIR}/external/simplesquirrel/")
+
 include(ProvidePhysFS)
-include(ProvideSquirrel)
 
 # If static linking is enabled, link additional libraries
 # Also, look at all of the dependencies it uses. This is one of the reasons why the portability API exists.
@@ -104,20 +99,14 @@ if(BUILD_STATIC_LIBS)
   endif()
 endif()
 
-# Include additional scripts
-include(BuildMiniswigWrapper)
-
 # Set include directories
 include_directories(${SDL2_INCLUDE_DIRS})
 include_directories("${CMAKE_CURRENT_SOURCE_DIR}/src")
 
 # Search for source files and copy the test suite to the output directory
-file(GLOB SRCFILES src/api/*.cpp
+file(GLOB SRCFILES src/audio/*.cpp
                    src/brux/*.cpp
-                   ${AUDIO_SOURCE}
-                   src/external/*.c
-                   src/squirrel/*.cpp
-                   src/squirrel/wrapper.cpp)
+                   src/external/*.c)
 add_executable(brux ${SRCFILES})
 file(COPY "${CMAKE_CURRENT_SOURCE_DIR}/test/" DESTINATION "${RUNTIME_OUTPUT_DIR}")
 
@@ -131,6 +120,8 @@ if(WIN32) # FIXME: Proper way of having the SDL2 libraries copied over to binary
   if (USE_SDL2_MIXER)
     target_link_libraries(brux PUBLIC ${SDL2_MIXER_LIBRARIES})
   endif()
+
+  target_link_libraries(brux PUBLIC simplesquirrel_static)
 else()
   target_link_libraries(brux PUBLIC SDL2)
   target_link_libraries(brux PUBLIC SDL2::Image)
@@ -139,8 +130,8 @@ else()
   if (USE_SDL2_MIXER)
     target_link_libraries(brux PUBLIC SDL2::Mixer)
   endif()
+
+  target_link_libraries(brux PUBLIC simplesquirrel)
 endif()
 
 target_link_libraries(brux PUBLIC LibPhysfs)
-target_link_libraries(brux PUBLIC LibSquirrel)
-target_link_libraries(brux PUBLIC LibSqstdlib)