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geanylua: Migrate to Lua 5.3 #1235

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geanylua: Migrate to Lua 5.3 #1235

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@techee techee commented Mar 5, 2023

This PR migrates geanylua to Lua 5.3 (my oldish distro doesn't provide lua 5.4 so I didn't test, maybe it works too). There were mostly just simple changes. From my limited testing, everything seems to work.

Posting as an (in my opinion better) alternative to #1233

With the NULL second parameter luaL_register() is equivalent to
luaL_setfuncs() as described e.g. here

https://wiki.gentoo.org/wiki/Lua/Porting_notes
luaL_register() can be replaced by:

1. creating a new table
2. adding the functions to it using luaL_setfuncs()
3. publishing this table globally by lua_setglobal()

Since these tables are registered just once, we don't care about the
special cases described below and the "merging" problem.

https://stackoverflow.com/questions/19041215/lual-openlib-replacement-for-lua-5-2
The documentation says these are identical.
LUA_GLOBALSINDEX is gone now but we can use the whole code below (the
original traceback reporting code was also stolen from here):

https://github.com/lua/lua/blob/cf08915d62e338c987b71c078b148490510e9fe7/lua.c#L248
@techee
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techee commented Mar 5, 2023

OK, I just tried on another VM and it compiles and runs with Lua 5.4 too, without any modifications. The only time some modifications were needed was for 5.1->5.2 transition, the 5.2->5.3 transition didn't require any change either.

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