Enable -D lua-vanilla for Lua tests, removing luarocks dependencies

[Copilot]

The Lua CI target required luv, lrexlib-pcre2, luautf8, and bit32 via luarocks. With -D lua-vanilla and Lua 5.4 as minimum, none of these are needed — but several runtime blockers existed.

Blockers fixed

• Sys.getEnv() in Main.hx — Guard the HXCORO_DISPATCHER dispatcher-selection block with #if (sys && !lua_vanilla) since Sys.getEnv throws in vanilla mode.

• Sys.sleep() in BackOff.hx — Used in the event-loop busy-wait; not available in vanilla mode. Added a #elseif lua_vanilla no-op branch before the existing #elseif sys one.

• Sys.time() via Timer.milliseconds() — HeapScheduler.now() → Timer.milliseconds() → Timer.stamp() → Sys.time(), which throws in vanilla mode. Added a #if lua_vanilla branch in HeapScheduler.now() using lua.Os.clock() instead.

Build file changes

tests/build-lua.hxml and callstack-tests/build-lua.hxml now include:

-D lua-vanilla

CI changes

The Setup Lua step in main.yml is reduced to just installing lua5.4 — all luarocks packages (luv, lrexlib-pcre2, luautf8, bit32) are removed.

---

📱 Kick off Copilot coding agent tasks wherever you are with GitHub Mobile, available on iOS and Android.

[Simn]

@copilot Haxe has had some changes for better lua-vanilla support, see HaxeFoundation/haxe#12599. Please confirm that you're on commit c4c8605af68e2b3fe5f8e35d880fbf6786d15557 and then see if the bit-op-related workarounds here can be removed now!

[Copilot]

@copilot Haxe has had some changes for better lua-vanilla support, see HaxeFoundation/haxe#12599. Please confirm that you're on commit c4c8605af68e2b3fe5f8e35...

Confirmed on c4c8605. The updated _hx_bit.lua now tries native Lua 5.4 bitwise operators first (before falling back to bit32/bit), so _hx_bit is never the error stub on Lua 5.4. Removed LuaVanillaBitPatch.hx, restored MinimumHeap.hx to the original bit-shifts, and dropped --macro include("hxcoro.lua") from the build files.

The Sys.time() workaround in EventLoopScheduler.now() and the Sys.sleep() no-op in BackOff.hx are still needed since Timer.stamp() → Sys.time() still throws in lua-vanilla mode and that hasn't changed in c4c8605.

Commit: edef8cf