setup for luarocks releases

modules/UTF8.lua

@@ -0,0 +1,44 @@
+---@class UTF8
+---Compatibility layer for UTF-8 support across Lua versions
+---Handles utf8 (Lua 5.3+), lua-utf8 (LuaRocks), and basic fallbacks
+
+local UTF8 = {}
+
+-- Try to load UTF-8 library in order of preference:
+-- 1. Built-in utf8 (Lua 5.3+, LÖVE2D)
+-- 2. lua-utf8 from LuaRocks (Lua 5.1, 5.2)
+-- 3. Error if neither available
+local function loadUTF8()
+  -- Try built-in utf8 first (Lua 5.3+ and LÖVE2D)
+  if utf8 and type(utf8) == "table" and utf8.len then
+    return utf8
+  end
+  
+  -- Try lua-utf8 from LuaRocks
+  local ok, luautf8 = pcall(require, "lua-utf8")
+  if ok then
+    return luautf8
+  end
+  
+  -- Try standard utf8 module name as fallback
+  ok, luautf8 = pcall(require, "utf8")
+  if ok then
+    return luautf8
+  end
+  
+  -- No UTF-8 library available
+  error("No UTF-8 library available. Please install 'luautf8' via LuaRocks: luarocks install luautf8")
+end
+
+-- Load the UTF-8 implementation
+local utf8lib = loadUTF8()
+
+-- Export all utf8 functions
+UTF8.char = utf8lib.char
+UTF8.charpattern = utf8lib.charpattern
+UTF8.codes = utf8lib.codes
+UTF8.codepoint = utf8lib.codepoint
+UTF8.len = utf8lib.len
+UTF8.offset = utf8lib.offset
+
+return UTF8