Revert debug stuff

android/app/build.gradle

@@ -53,11 +53,6 @@ android {
 		targetCompatibility JavaVersion.VERSION_1_8
 	}
 	namespace 'net.minetest.minetest'
-    buildTypes {
-        release {
-            signingConfig signingConfigs.debug
-        }
-    }
 }
 
 task prepareAssets() {

android/app/src/main/java/net/minetest/minetest/Utils.java

@@ -36,6 +36,10 @@ public static File getCacheDirectory(@NonNull Context context) {
 	}
 
 	public static boolean isInstallValid(@NonNull Context context) {
-		return false;
+		File userDataDirectory = getUserDataDirectory(context);
+		return userDataDirectory.isDirectory() &&
+			new File(userDataDirectory, "builtin").isDirectory() &&
+			new File(userDataDirectory, "client").isDirectory() &&
+			new File(userDataDirectory, "textures").isDirectory();
 	}
 }

builtin/game/init.lua

@@ -43,37 +43,3 @@ dofile(gamepath .. "death_screen.lua")
 core.after(0, builtin_shared.cache_content_ids)
 
 profiler = nil
-
-
-local function clean_vec_print(v)
-	return string.format("%.3f, %.3f, %.3f", v.x, v.y, v.z)
-end
-
-function haha()
-	for _, p in ipairs(core.get_connected_players()) do
-		p:set_look_horizontal(math.random() * math.pi * 4)
-		p:set_look_vertical(math.random() * math.pi - math.pi/2)
-
-		-- Basically the usefulness of storing the point dir relative to the
-		-- look dir is this:
-		-- > When the server sets the look dir, the server knows the correct new point dir,
-		-- > even before the network round-trip to the client
-		-- or
-		-- > The two values printed below are equal
-		-- > (assuming no look dir / point dir changes happen on the client in the meantime)
-
-		-- This works both on desktop (or with touch_use_crosshair = true) and with
-		-- touch_use_crosshair = false.
-		-- To use this test code with touch_use_crosshair = false, just put your
-		-- finger anywhere on the screen.
-
-		core.log("error", "server-side point dir = " .. clean_vec_print(p:get_point_dir()) .. " (before round-trip)")
-		core.after(0.5, function()
-			core.log("error", "server-side point dir = " .. clean_vec_print(p:get_point_dir()) .. " (after round-trip)")
-		end)
-	end
-
-	core.after(2, haha)
-end
-
-core.after(2, haha)