[MacPorts] #70420: neovim @0.10.0_1: error loading module 'nlua0' from file 'libnlua0.so'

[MacPorts]

#70420: neovim @0.10.0_1: error loading module 'nlua0' from file 'libnlua0.so'
---------------------+----------------------
  Reporter:  wryfi   |      Owner:  l2dy
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.9.3
Resolution:          |   Keywords:
      Port:  neovim  |
---------------------+----------------------

Comment (by wryfi):

 Something is definitely fishy with the way macports is managing lua and/or
 luarocks dependencies, but I don't know enough about either MacPorts or
 lua to pin it down precisely.

 I uninstalled everything related to lua from my system, ran `port
 reclaim`, ran `port clean --all` on all of the lua and neovim related
 ports, and then tried `port install neovim` all over again. I got exactly
 the same errors as before, no change whatsoever.

 Even though neovim uses exclusively lua-5.1, and I have no other lua
 dependent ports on my system, lua-5.3 packages always get installed — even
 though I have no use for them whatsoever!

 When building neovim, something gets compiled against lua-5.3, because
 (similar to #66077) `_luaL_prepbuffsize` does not exist in lua-5.1.

 So then I uninstalled `lua53-luarocks` and `lua53` ports, despite a
 warning:

 {{{
 Note: It is not recommended to uninstall/deactivate a port that has
 dependents as it breaks the dependents.
 The following ports will break: lua-luarocks @3.9.2_0
 }}}

 Et voila — `port install neovim` succeeds without a hitch!

 I don't know if this **actually** breaks anything with lua-luarocks, but
 it fixes my problem.

 This looks fishy to me:

 {{{
 The following ports are dependencies of neovim @0.10.1_0:
   ...
   luajit
   lua51-lpeg
     lua-luarocks
       lua
       lua53-luarocks
         lua53
     lua51
   lua51-mpack
   luv-luajit
   ...
 }}}

 Why do lua-5.1 packages depend on lua-5.3 packages? That can't be right,
 can it?!

-- 
Ticket URL: <https://trac.macports.org/ticket/70420#comment:7>
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