Add formatter for lua 5.1

[ElPiloto]

luaformatterfiveone is a formatter for Lua 5.1. It is readily available
through standard via luarocks install formatterfiveone.

[google-cla]

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[ElPiloto]

@googlebot I fixed it

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[ElPiloto]

@googlebot I fixed it

[google-cla]

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[ElPiloto]

@googlebot I fixed it

[google-cla]

We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for all the commit author(s) or Co-authors. If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.
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[dbarnett]

Thanks, and sorry for the hassle of whatever was happening w/ the CLA bot there.

[dbarnett]

Thanks! Merging now.

[mxngls]

EDIT:

I solved the issue myself. There were two apparent problems:

1. luaformatterfiveone could not be found by vim-codefmt. Therefore we have to manually set the path of the formatter executable as described here:

:Glaive codefmt luaformatterfiveone_executable='PATH'

2. Trying to format like this leads to another error saying that a necessary package (checks) cannot be found. We need to manually install this package ourselves with luarocks via:

luarocks install check

After completing these two steps lua files can be formatted as any other file via vim-codefmt.

---

Error

I followed the installation steps but when trying to format Lua code I get the following error message:

Formatter "luaformatterfiveone" is not available. Setup instructions: Install luaformatterfiveone with luarocks. (https://luarocks.org/modules/ElPiloto/formatterfiveo
ne).

The package as itself is installed as described in the linked repo:

max in ~  -> luarocks list

Rocks installed for Lua 5.1
---------------------------

formatterfiveone
   0.1.2-1 (installed) - /Users/max/.luarocks/lib/luarocks/rocks-5.1

luafilesystem
   1.6.3-2 (installed) - /Users/max/.luarocks/lib/luarocks/rocks-5.1

metalua-compiler
   0.7.3-1 (installed) - /Users/max/.luarocks/lib/luarocks/rocks-5.1

metalua-parser
   0.7.3-2 (installed) - /Users/max/.luarocks/lib/luarocks/rocks-5.1

penlight
   0.9.8-1 (installed) - /Users/max/.luarocks/lib/luarocks/rocks-5.1

Help would be much appreciated.

Thanks in advance.

[dbarnett]

Yeah, so the availability check is just checking if flag path is executable. You don't actually have to change the flag to specify the full path, the default value should work fine for most people, but if you haven't installed it to your path so that you can run luaformatterfiveone in the same terminal you started vim from, it won't show as available.

[nakulj]

@mxngls thanks! For anyone else running into problems, two tips:

1. If you have a different version of lua installed, tell luarocks to use 5.1 like so:

luarocks install --lua-dir=/opt/homebrew/opt/[email protected]/  formatterfiveone

2. You want to

   luarocks install checks

   - there's a missing 's' in the original comment.