Luarocks not working on fresh install: "Error: failed making directory"

[osch]

Description / Steps to reproduce the issue

Steps to reproduce:

• Install fresh MSYS2 into C:\tmp\msys64 (the crucial point is, that there are no lua modules, especially luafilesystem in the fresh install)

• Launch "MSYS2 MinGW x64" (MSYSTEM=MINGW64)

• Install Lua pacman -S mingw-w64-x86_64-lua

• Install Luarocks pacman -S mingw-w64-x86_64-lua-luarocks

• Install a Lua module, e.g. lpeg using Luarocks: luarocks install lpeg

Last step results in error:

$ luarocks install lpeg
Installing https://luarocks.org/lpeg-1.0.2-1.src.rock

lpeg 1.0.2-1 depends on lua >= 5.1 (5.4-1 provided by VM)

Error: failed making directory C:/tmp/msys64/mingw64/lib/luarocks/rocks-5.4/lpeg/1.0.2-1/conf

Expected behavior

Expected behavior is that the command luarocks install lpeg does install the Lua module lpeg without errors.

Actual behavior

Actual bahaviour is that the command luarocks install lpeg does not install the module lpeg and gives error on a fresh install of msys. This is a general error and does not depend on the concrete module lpeg which is only an example for the general situation.

$ type lua
bash: type: lua: not found

$ pacman -S mingw-w64-x86_64-lua
....

$ type lua
lua is /mingw64/bin/lua

$ lua -e 'print(require"lfs")'
C:\tmp\msys64\mingw64\bin\lua.exe: (command line):1: module 'lfs' not found:

$ lua -e 'print(require"lpeg")'
C:\tmp\msys64\mingw64\bin\lua.exe: (command line):1: module 'lpeg' not found:

$ pacman -S mingw-w64-x86_64-lua-luarocks
...

$ pacman -Q mingw-w64-x86_64-lua
mingw-w64-x86_64-lua 5.4.4-1

$ pacman -Q mingw-w64-x86_64-lua-luarocks
mingw-w64-x86_64-lua-luarocks 3.9.0-1

$ lua -e 'print(require"lfs")'
C:\tmp\msys64\mingw64\bin\lua.exe: (command line):1: module 'lfs' not found:

$ lua -e 'print(require"lpeg")'
C:\tmp\msys64\mingw64\bin\lua.exe: (command line):1: module 'lpeg' not found:

$ luarocks install lpeg
Installing https://luarocks.org/lpeg-1.0.2-1.src.rock

lpeg 1.0.2-1 depends on lua >= 5.1 (5.4-1 provided by VM)

Error: failed making directory C:/tmp/msys64/mingw64/lib/luarocks/rocks-5.4/lpeg/1.0.2-1/conf

I wrote more details here: #12002

Verification

• I have verified that my MSYS2 is up-to-date before submitting the report (see https://www.msys2.org/docs/updating/)

Windows Version

MSYS_NT-10.0-19045

MINGW environments affected

• MINGW64
• MINGW32
• UCRT64
• CLANG64
• CLANG32
• CLANGARM64

Are you willing to submit a PR?

yes, I already did and wrote more details: see: #12002

[osch]

fixed in #20166