Remove FindSDL2 find-module, use sdl2-config.cmake instead This requires SDL >= 2.0.4. Since <https://bugzilla.libsdl.org/show_bug.cgi?id=2464> was fixed in SDL 2.0.4, SDL behaves as a CMake "config-file package", even if it was not itself built using CMake: it installs a sdl2-config.cmake file to ${libdir}/cmake/SDL2, which tells CMake where to find SDL's headers and library, analogous to a pkg-config .pc file. As a result, we no longer need to copy/paste a "find-module package" to be able to find a system copy of SDL >= 2.0.4 with find_package(SDL2). Find-module packages are now discouraged by the CMake developers, in favour of having upstream projects behave as config-file packages. This results in a small API change: FindSDL2 used to set SDL2_INCLUDE_DIR and SDL2_LIBRARY, but the standard behaviour for config-file packages is to set <name>_INCLUDE_DIRS and <name>_LIBRARIES. Use the CONFIG keyword to make sure we search in config-file package mode, and will not find a FindSDL2.cmake in some other directory that implements the old interface. In addition to deleting redundant code, this avoids some assumptions in FindSDL2 about the layout of a SDL installation. The current libsdl2-dev package in Debian breaks those assumptions; this is considered a bug and will hopefully be fixed soon, but it illustrates how fragile these assumptions can be. We can be more robust against different installation layouts by relying on SDL's own CMake integration. When linking to a copy of CMake in a non-standard location, users can now set the SDL2_DIR or CMAKE_PREFIX_PATH environment variable to point to it; previously, these users would have used the SDL2DIR environment variable. This continues to be unnecessary if using matching system-wide installations of CMake and SDL2, for example both from Debian.

local SHOW_WARNINGS = false

local function scandir(directory)
	local i, t, popen = 0, {}, io.popen
	local pfile = popen('ls -a "'..directory..'"')
	for filename in pfile:lines() do
		i = i + 1
		t[i] = filename
	end
	pfile:close()
	return t
end

local locale_dir = "../share/hedgewars/Data/Locale"

local files = scandir(locale_dir)

for f = 1, #files do
	local filename = files[f]
	if string.match(filename, "^[a-zA-Z_]+%.lua$") ~= nil and filename ~= "stub.lua" then

		print("== "..filename.." ==")
		dofile(locale_dir .. "/" .. filename)
		local errors = 0
		for eng, transl in pairs(locale) do
			local example = "[\""..tostring(eng).."\"] = \""..tostring(transl).."\""

			-- Check for obvious errors
			if transl == "" then
				print("[EE] Empty translation: "..example)
				errors = errors + 1
			end
			if eng == "" then
				print("[EE] Empty source string: "..example)
				errors = errors + 1
			end
			if type(transl) ~= "string" then
				print("[EE] Translation is not a string: "..example)
				errors = errors + 1
			end
			if type(eng) ~= "string" then
				print("[EE] Source is not a string: "..example)
				errors = errors + 1
			end

			-- Check parameters
			local ne, nt = 0, 0
			local patterns = { "c", "d", "E", "e", "f", "g", "G", "i", "o", "u", "X", "x", "q", "s", "%.%df", "%.f", "" }
			for p = 1, #patterns do
				for w in string.gmatch(eng, "%%"..patterns[p]) do
					ne = ne + 1
				end
				for w in string.gmatch(transl, "%%"..patterns[p]) do
					nt = nt + 1
				end
			end
			if ne ~= nt then
				print("[EE] Param mismatch!: [\""..eng.."\"] = \""..transl.."\"")
				errors = errors + 1
			end

			-- Warnings
			if SHOW_WARNINGS and eng == transl then
				print("[WW] Translation unchanged: "..example)
			end
		end
		if errors == 0 then
			print("OK")
		end
	end
end