android: remove Donate option in main menu

to comply with Google Play policy. Only applies to builds published on Google Play via the SUPERTUX_GOOGLE_PLAY CMake option.

Author: MatusGuy

mk/android/app/build.gradle

@@ -28,7 +28,7 @@ android {
         minSdkVersion 21
 
         // NOTE: Don't forget to bump the version code!
-        versionCode 5
+        versionCode 6
         versionName "0.7.0-beta.2"
 
         ndkVersion "29.0.14206865"
@@ -52,6 +52,9 @@ android {
                           "-Wno-dev"
                 abiFilters rootProject.ext.cpuarch as String[]
             }
+            if (rootProject.ext.googleplay) {
+                android.defaultConfig.externalNativeBuild.cmake.arguments.add("-DSUPERTUX_GOOGLE_PLAY=ON")
+            }
             android.defaultConfig.externalNativeBuild.cmake.arguments.addAll(rootProject.ext.cmake_args)
         }
     }

mk/android/build.gradle

@@ -8,6 +8,8 @@ for (String task : gradle.startParameter.getTaskNames()) {
     }
 }
 
+ext.googleplay = hasProperty("googleplay")
+
 if (hasProperty("cpuarch")) {
     ext.cpuarch = property("cpuarch").split()
 } else {

mk/cmake/SuperTux/Android.cmake

@@ -1,5 +1,7 @@
 message(STATUS "ANDROID_ABI: ${ANDROID_ABI} :)")
 
+option(SUPERTUX_GOOGLE_PLAY NO "Build SuperTux for Google Play")
+
 if(NOT DEFINED ENV{ANDROID_NDK_HOME})
   set(ndk_home "${SUPERTUX_NDK_HOME}")
 else()
@@ -26,6 +28,10 @@ endif()
 
 add_compile_options(-D__ANDROID__)
 
+if(SUPERTUX_GOOGLE_PLAY)
+  add_compile_definitions(GOOGLE_PLAY)
+endif()
+
 set(ANDROID_STL "c++_shared")
 set(VCPKG_CHAINLOAD_TOOLCHAIN_FILE ${ndk_home}/build/cmake/android.toolchain.cmake)
 set(CMAKE_TOOLCHAIN_FILE ${vcpkg_root}/scripts/buildsystems/vcpkg.cmake)

src/supertux/menu/main_menu.cpp

@@ -66,8 +66,8 @@ MainMenu::MainMenu()
   add_entry(MNID_LEVELEDITOR, _("Level Editor"));
 #endif
   add_entry(MNID_CREDITS, _("Credits"));
-#ifndef STEAM_BUILD
-  // Links to external purchases are not allowed on Steam, including donations
+#if !defined(STEAM_BUILD) && !defined(GOOGLE_PLAY)
+  // Links to external purchases are not allowed on Steam or Google Play, including donations
   add_entry(MNID_DONATE, _("Donate"));
 #endif
 #ifndef REMOVE_QUIT_BUTTON