Add DUSK_PACKAGE_INSTALL (#1966)

Signed-off-by: Reilly Brogan <reilly@reillybrogan.com>

CMakeLists.txt

@@ -148,6 +148,7 @@ option(DUSK_SELECTED_OPT "If on, selected parts of the project will be compiled
 option(DUSK_MOVIE_SUPPORT "If on, compile against libjpeg-turbo to enable THP file decoding" ON)
 option(DUSK_ENABLE_UPDATE_CHECKER "Enable update checking support" ON)
 option(DUSK_ENABLE_SENTRY_NATIVE "Enable sentry-native crash reporting support" OFF)
+option(DUSK_PACKAGE_INSTALL "Install Dusklight with a Linux-native file structure" OFF)
 option(DUSK_GFX_DEBUG_GROUPS "Report debug groups to the native graphics API" ${DUSK_GFX_DEBUG_GROUPS_DEFAULT})
 set(DUSK_SENTRY_DSN "" CACHE STRING "Sentry DSN")
 set(DUSK_SENTRY_ENVIRONMENT "development" CACHE STRING "Sentry environment")
@@ -256,7 +257,6 @@ elseif (MSVC)
     add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:/utf-8>)
 endif ()
 
-
 include(FetchContent)
 
 # Declare all dependencies first so CMake can download them in parallel
@@ -425,6 +425,11 @@ if(ANDROID)
     list(APPEND GAME_COMPILE_DEFS TARGET_ANDROID=1)
 endif ()
 
+if (DUSK_PACKAGE_INSTALL)
+    include(GNUInstallDirs)
+    list(APPEND GAME_COMPILE_DEFS DUSK_ASSET_DIR="${CMAKE_INSTALL_FULL_DATADIR}/dusklight/")
+endif ()
+
 if (DUSK_GFX_DEBUG_GROUPS)
     list(APPEND GAME_COMPILE_DEFS DUSK_GFX_DEBUG_GROUPS=1)
     target_compile_definitions(aurora_gx PRIVATE AURORA_GFX_DEBUG_GROUPS)
@@ -648,12 +653,20 @@ set(EXTRA_TARGETS "")
 if (TARGET crashpad_handler)
     list(APPEND EXTRA_TARGETS crashpad_handler)
 endif ()
-install(TARGETS ${BINARY_TARGETS} ${EXTRA_TARGETS} DESTINATION ${CMAKE_INSTALL_PREFIX})
+if (DUSK_PACKAGE_INSTALL)
+    install(TARGETS ${BINARY_TARGETS} ${EXTRA_TARGETS} DESTINATION ${CMAKE_INSTALL_BINDIR})
+else()
+    install(TARGETS ${BINARY_TARGETS} ${EXTRA_TARGETS} DESTINATION ${CMAKE_INSTALL_PREFIX})
+endif()
 aurora_install_runtime_dlls(dusklight ${CMAKE_INSTALL_PREFIX})
 if (NOT APPLE)
-    install(DIRECTORY ${CMAKE_SOURCE_DIR}/res DESTINATION ${CMAKE_INSTALL_PREFIX})
+    if (DUSK_PACKAGE_INSTALL)
+        install(DIRECTORY ${CMAKE_SOURCE_DIR}/res DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/dusklight)
+    else()
+        install(DIRECTORY ${CMAKE_SOURCE_DIR}/res DESTINATION ${CMAKE_INSTALL_PREFIX})
+    endif()
 endif ()
-if (CMAKE_BUILD_TYPE STREQUAL Debug OR CMAKE_BUILD_TYPE STREQUAL RelWithDebInfo)
+if (CMAKE_BUILD_TYPE STREQUAL Debug OR CMAKE_BUILD_TYPE STREQUAL RelWithDebInfo AND NOT DUSK_PACKAGE_INSTALL)
     set(DEBUG_FILES_LIST "")
     foreach (target IN LISTS BINARY_TARGETS EXTRA_TARGETS)
         get_target_output_name(${target} output_name)

src/dusk/imgui/ImGuiEngine.cpp

@@ -20,7 +20,11 @@
 namespace dusk {
 namespace {
 std::string GetAssetPath(const char* assetName) {
+#ifdef DUSK_ASSET_DIR
+    const char* basePath = DUSK_ASSET_DIR;
+#else
     const char* basePath = SDL_GetBasePath();
+#endif
     if (basePath != nullptr && basePath[0] != '\0') {
         return std::string(basePath) + "res/" + assetName;
     }

src/m_Do/m_Do_main.cpp

@@ -577,6 +577,9 @@ int game_main(int argc, char* argv[]) {
         config.appName = dusk::AppName;
         config.userPath = reinterpret_cast<const char*>(userPathString.c_str());
         config.cachePath = reinterpret_cast<const char*>(cachePathString.c_str());
+#ifdef DUSK_ASSET_DIR
+        config.resourcesPath = DUSK_ASSET_DIR;
+#endif
         config.vsync = dusk::getSettings().video.enableVsync;
         config.startFullscreen = dusk::getSettings().video.enableFullscreen;
         config.windowPosX = -1;