Embed Switch game assets in RomFS

xmake.lua

@@ -35,7 +35,6 @@ if is_plat("windows") then
     target("Frostbite2DGame")
         set_kind("binary")
         add_files("game/src/**.cpp")
-        remove_files("game/src/switch_game_main.cpp")
         add_deps("Frostbite2D")
         add_packages("libsdl2")
         add_packages("libsdl2_image")
@@ -56,7 +55,6 @@ if is_plat("switch") then
         set_kind("binary")
         set_filename("Frostbite2DGame.elf")
         add_files("game/src/**.cpp")
-        remove_files("game/src/main.cpp")
         add_deps("Frostbite2D")
         add_cxflags("-D__SWITCH__", "-fPIE", {public = true})
         add_ldflags("-specs=" .. path.join(os.getenv("DEVKITPRO") or "C:/devkitPro", "libnx/switch.specs"), "-fPIE", {force = true})
@@ -71,13 +69,19 @@ if is_plat("switch") then
             local libnx = path.join(devkitpro, "libnx")
             local nacp = path.join(outdir, "control.nacp")
             local nro = path.join(outdir, "NSUnknownGame.nro")
+            local romfsdir = path.join(outdir, "romfs")
+            os.rm(romfsdir)
+            os.mkdir(romfsdir)
+            os.cp(path.join(os.projectdir(), "game/assets"),
+                  path.join(romfsdir, "assets"))
             os.execv(path.join(tools, "nacptool.exe"), {
                 "--create", "NS Unknown Game", "Frostbite2D", "1.0.0", nacp
             })
             os.execv(path.join(tools, "elf2nro.exe"), {
                 target:targetfile(), nro,
                 "--nacp=" .. nacp,
-                "--icon=" .. path.join(libnx, "default_icon.jpg")
+                "--icon=" .. path.join(libnx, "default_icon.jpg"),
+                "--romfsdir=" .. romfsdir
             })
         end)
     target_end()