[MINGW32] mingw-w64-i686-lua51-luarocks installs broken config files

[SlySven]

Immediately after installing the 32-Bit version of luarocks i.e. mingw-w64-i686-lua51-luarocks it is misconfigured as the output of the luarocks command in a MINGW32 terminal shows:

...
CONFIGURATION
        Lua version: 5.1
        Configuration files:
                System: /mingw32/etc/luarocks/config-5.1.lua (not found)
                User  : C:/msys64/home/stephen/.luarocks/config-5.1.lua (not found)

        Rocks trees in use:
                C:/msys64/home/stephen/.luarocks ("user")
                /mingw32 ("system")

stephen@Ripley MINGW32 ~
$ luarocks list

Installed rocks:
----------------


stephen@Ripley MINGW32 ~
$ luarocks install luafilesystem

Error: /mingw32/lib/luarocks/rocks does not exist and your user does not have write permissions in /
-- you may want to run as a privileged user or use your local tree with --local.

stephen@Ripley MINGW32 ~

That error is indeed correct as there is not a /mingw32/lib/luarocks/rocks directory, but instead there is a /mingw32/lib/luarocks/rocks-5.1 one!

As I am running on a 64-Bit system which does work (to allow Lua packages to be compiled/installed) I can compare the above with the output from the 64-Bit mingw-w64-x86_64-lua51-luarocks :

...
CONFIGURATION
        Lua version: 5.1
        Configuration files:
                System: C:/mingw64/etc/luarocks/config-5.1.lua (ok)
                User  : C:/msys64/home/stephen/.luarocks/config-5.1.lua (not found)

        Rocks trees in use:
                C:/msys64/home/stephen/.luarocks ("user")
                C:/msys64/mingw64 ("system")

stephen@Ripley MINGW32 ~
$

Investigation of the differences between the two systems led me to the /mingw32/share/lua/5.1/luarocks/site_config.lua and it's counterpart /mingw64/share/lua/5.1/luarocks/site_config.lua:

$ more $(locate site_config)
::::::::::::::
/mingw32/share/lua/5.1/luarocks/site_config.lua
::::::::::::::
local site_config = {}
site_config.LUAROCKS_PREFIX=[[/mingw32]] -- notice how all the paths here are missing 'C:/msys64' compared to the 64-Bit one
site_config.LUA_INCDIR=[[/mingw32/include/lua5.1]]
site_config.LUA_LIBDIR=[[/mingw32/lib]]
site_config.LUA_BINDIR=[[/mingw32/bin]]
site_config.LUA_INTERPRETER=[[lua5.1.exe]]
site_config.LUAROCKS_SYSCONFDIR=[[/mingw32/etc/luarocks]]
site_config.LUAROCKS_ROCKS_TREE=[[/mingw32]]
site_config.LUAROCKS_ROCKS_SUBDIR=[[/lib/luarocks/rocks]] -- notice the absence of the '-5.1' suffix
site_config.LUAROCKS_UNAME_S=[[MINGW32_NT-6.1]]
site_config.LUAROCKS_UNAME_M=[[x86_64]]
site_config.LUAROCKS_DOWNLOADER=[[curl]]
site_config.LUAROCKS_MD5CHECKER=[[md5sum]]
return site_config
::::::::::::::
/mingw64/share/lua/5.1/luarocks/site_config.lua
::::::::::::::
local site_config = {}
site_config.LUAROCKS_PREFIX=[[C:/msys64/mingw64]]
site_config.LUA_INCDIR=[[C:/msys64/mingw64/include/lua5.1]]
site_config.LUA_LIBDIR=[[C:/msys64/mingw64/lib]]
site_config.LUA_BINDIR=[[C:/msys64/mingw64/bin]]
site_config.LUA_INTERPRETER=[[lua5.1.exe]]
site_config.LUAROCKS_SYSCONFDIR=[[C:/msys64/mingw64/etc/luarocks]]
site_config.LUAROCKS_ROCKS_TREE=[[C:/msys64/mingw64]]
site_config.LUAROCKS_ROCKS_SUBDIR=[[/lib/luarocks/rocks-5.1]]
site_config.LUAROCKS_UNAME_S=[[MINGW64_NT-6.1]]
site_config.LUAROCKS_UNAME_M=[[x86_64]]
site_config.LUAROCKS_DOWNLOADER=[[curl]]
site_config.LUAROCKS_MD5CHECKER=[[md5sum]]
return site_config

stephen@Ripley MINGW32 ~

If I manually edit that 32-Bit site_config.lua file to change them to correspond to the 64-Bit one so it becomes:

local site_config = {}
site_config.LUAROCKS_PREFIX=[[C:/msys64/mingw32]]
site_config.LUA_INCDIR=[[C:/msys64/mingw32/include/lua5.1]]
site_config.LUA_LIBDIR=[[C:/msys64/mingw32/lib]]
site_config.LUA_BINDIR=[[C:/msys64/mingw32/bin]]
site_config.LUA_INTERPRETER=[[lua5.1.exe]]
site_config.LUAROCKS_SYSCONFDIR=[[C:/msys64/mingw32/etc/luarocks]]
site_config.LUAROCKS_ROCKS_TREE=[[C:/msys64/mingw32]]
site_config.LUAROCKS_ROCKS_SUBDIR=[[/lib/luarocks/rocks-5.1]]
site_config.LUAROCKS_UNAME_S=[[MINGW32_NT-6.1]]
site_config.LUAROCKS_UNAME_M=[[x86_64]]
site_config.LUAROCKS_DOWNLOADER=[[curl]]
site_config.LUAROCKS_MD5CHECKER=[[md5sum]]
return site_config

The output from the plain luarocks command looks more promising:

CONFIGURATION
        Lua version: 5.1
        Configuration files:
                System: C:/msys64/mingw32/etc/luarocks/config-5.1.lua (ok)
                User  : C:/msys64/home/stephen/.luarocks/config-5.1.lua (not found)

        Rocks trees in use:
                C:/msys64/home/stephen/.luarocks ("user")
                /mingw32 ("system")

but the command to compile/install a package still fails:

$ luarocks install luafilesystem

Error: /mingw32/lib/luarocks/rocks-5.1 does not exist and your user does not have write permissions in /
-- you may want to run as a privileged user or use your local tree with --local.

the "Rocks trees in use:" still does not match the one for the 64-Bit case, and this leads to the (now being found where it wasn't before) /mingw32/ect/luarocks/config-5.1.lua file and it's /mingw64/ect/luarocks/config-5.1.lua counterpart:

stephen@Ripley MINGW32 ~
$ more $(locate  config-5.1.lua)
::::::::::::::
/mingw32/etc/luarocks/config-5.1.lua
::::::::::::::
rocks_trees = {
   { name = [[user]], root = home..[[/.luarocks]] },
   { name = [[system]], root = [[/mingw32]] } -- This too is missing the 'C:/msys64' present in the 64Bit one
}
::::::::::::::
/mingw64/etc/luarocks/config-5.1.lua
::::::::::::::
rocks_trees = {
   { name = [[user]], root = home..[[/.luarocks]] },
   { name = [[system]], root = [[C:/msys64/mingw64]] }
}

Changing that Lua table to contain root = [[C:/msys64/mingw32]] seems to sort things out:

stephen@Ripley MINGW32 ~
$ more /mingw32/etc/luarocks/config-5.1.lua
rocks_trees = {
   { name = [[user]], root = home..[[/.luarocks]] },
   { name = [[system]], root = [[C:/msys64/mingw32]] }
}

stephen@Ripley MINGW32 ~
$ luarocks

LuaRocks 2.4.4, the Lua package manager

NAME
        C:/msys64/mingw32/bin/luarocks - LuaRocks main command-line interface

...
<snip>
...
CONFIGURATION
        Lua version: 5.1
        Configuration files:
                System: C:/msys64/mingw32/etc/luarocks/config-5.1.lua (ok)
                User  : C:/msys64/home/stephen/.luarocks/config-5.1.lua (not found)

        Rocks trees in use:
                C:/msys64/home/stephen/.luarocks ("user")
                C:/msys64/mingw32 ("system")

stephen@Ripley MINGW32 ~
$ luarocks install luafilesystem
Installing https://luarocks.org/luafilesystem-1.7.0-2.src.rock
gcc -O2 -fPIC -c -o src/lfs.o -IC:/msys64/mingw32/include/lua5.1 src/lfs.c
gcc -shared -o lfs.dll src/lfs.o C:/msys64/mingw32/lib/liblua5.1.dll.a -lm
luafilesystem 1.7.0-2 is now installed in C:/msys64/mingw32 (license: MIT/X11)

stephen@Ripley MINGW32 ~
$

Now this fixes the symptoms but does not identify the cause! I am not really expert enough to find where things are going wrong but I suspect that the internal execution flow through the Lua executable and interpreted scripts is not the same for the two systems - being that the 32-Bit one is probably inherited from the original MSYS/Mingw and the 64-Bit one has probably been bolted on afterwards!

I would note also that the two systems would seem to share a ~/.luarocks/config-5.1.lua file - if it were to exist - on the other hand, since the system one seems to hold a rocks_trees lua table saying where the rocks and the compiled .dll (packages) go for BOTH the system and the user {used when the --local optional argument is present} rocks case.

It is not immediately obvious to me as what purpose the "User" Configuration file serves...? 😕

[SlySven]

I have just had occasion to look at the current 32-bit install file

MINGW-packages/mingw-w64-lua-luarocks/luarocks-i686.install

Line 4 in 5338f83

sed -s "s|${PREFIX_WIN}|${MINGW_PREFIX}|g" \

and

MINGW-packages/mingw-w64-lua-luarocks/luarocks-i686.install

Line 7 in 5338f83

sed -s "s|${PREFIX_WIN}|${MINGW_PREFIX}|g" \

and I have spotted that the replacement operation is the opposite way around to the related lines

MINGW-packages/mingw-w64-lua-luarocks/luarocks-x86_64.install

Line 4 in 5338f83

sed -s "s|${MINGW_PREFIX}|${PREFIX_WIN}|g" \

and

MINGW-packages/mingw-w64-lua-luarocks/luarocks-x86_64.install

Line 7 in 5338f83

sed -s "s|${MINGW_PREFIX}|${PREFIX_WIN}|g" \

in the 64-bit case! 😮

This must at least be partly responsible for the errors I am seeing...