patch 8.2.2733: detecting Lua version is not reliable
Problem: Detecting Lua version is not reliable.
Solution: Add "vim.lua_version". (Ozaki Kiichi, closes #8080)
diff --git a/src/testdir/test_lua.vim b/src/testdir/test_lua.vim
index b9ef0d2..c330563 100644
--- a/src/testdir/test_lua.vim
+++ b/src/testdir/test_lua.vim
@@ -13,18 +13,7 @@
CheckFeature float
" Depending on the lua version, the error messages are different.
-let s:luaver = split(split(systemlist('lua -v')[0], ' ')[1], '\.')
-if len(s:luaver) < 3
- " Didn't get something that looks like a version, use _VERSION.
- let s:luaver = split(split(luaeval('_VERSION'), ' ')[1], '\.')
-endif
-let s:major = str2nr(s:luaver[0])
-let s:minor = str2nr(s:luaver[1])
-if len(s:luaver) >= 3
- let s:patch = str2nr(s:luaver[2])
-else
- let s:patch = 0
-endif
+let [s:major, s:minor, s:patch] = luaeval('vim.lua_version')->split('\.')->map({-> str2nr(v:val)})
let s:lua_53_or_later = 0
let s:lua_543_or_later = 0
if (s:major == 5 && s:minor >= 3) || s:major > 5