rubocop formatter erases buffer

[BrianHicks]

Using 528b5e4, neovim v0.3.8

When I run :Neoformat using the rubocop formatter, my buffer gets erased. Here's what the output looks like with g:neoformat_verbose = 1:

Neoformat: executable: rufo is not an executable
Neoformat: executable: ruby-beautify is not an executable
Neoformat: ['class Simple', '  def hello', '    "World"', '  end', 'end']
Neoformat: rubocop --auto-correct --stdin "/Users/brianhicks/code/NoRedInk/NoRedInk/simple.rb" 2>/dev/null | sed "1,/^====================$/d"
Neoformat: using stdin
Neoformat: []
Neoformat: [0]
Neoformat: 0

When I run that command in the same shell as vim, it prints to stdout correctly. (rubocop --auto-correct --stdin "simple.rb" 2>/dev/null < simple.rb | sed "1,/^====================$/d")

What else can I give you to help with this? I'd offer to open a PR but I don't have any idea where to look!

[tjaartvdwalt]

Are you using a ruby manager, like rvm or chruby?

I use chruby, and got a similar problem when my ruby was not correctly set.

Below are the ex commands I run to illustrate what I mean:

:!which ruby
/usr/bin/ruby

:Neoformat
# buffer is deleted

:undo
:Chruby auto

:!which ruby
/home/tjaart/.rubies/ruby-2.6.5/bin/ruby 

:Neoformat
# buffer formatted successfully

[nietaki]

In my case the same version of ruby I normally would be (the asdf one):

:!which ruby                                                                                                                                                                                                                                                                                                                        
/home/nietaki/.asdf/shims/ruby

What seems to be causing the problem is invalid Ruby syntax - the formatter instead of giving up and coughing up an error message deletes the buffer contents. Here's the :messages output I got with :let g:neoformat_verbose = 1:

Neoformat: <...source code cut...>
Neoformat: rufo 2> /tmp/neoformat/stderr.log
Neoformat: using stdin
Neoformat: []
Neoformat: [0, 3]
Neoformat: 1
Neoformat: stderr output redirected to file/tmp/neoformat/stderr.log
Neoformat: ['STDIN is invalid code. Error on line:24 syntax error, unexpected tIDENTIFIER, expecting tCONSTANT']
Neoformat: 1
Neoformat: trying next formatter
Neoformat: executable: ruby-beautify is not an executable
Neoformat: <...source code cut...>
Neoformat: rubocop --auto-correct --stdin "<...path cut...>" 2>/dev/null | sed "1,/^====================$/d"
Neoformat: using stdin
Neoformat: []
Neoformat: [0]
Neoformat: 0
Neoformat: rubocop formatted buffer

Fixing the error fixed the formatter

[BrianHicks]

Are you using a ruby manager, like rvm or chruby?

I was using a Ruby installed via Nix. which ruby returned the right thing outside Vim. I'm not sure about inside.

I can't provide any more help with this, as I've switched to Kakoune some months ago and removed my vim configuration. If someone wanted to go to the effort to reproduce I can give you my dotfiles at the relevant version but they're fairly idiosyncratic—definitely better to reproduce using another person's setup if possible.

[foreverLoveWisdom]

I somehow get the same problem today. It deletes all of my code. Has anyone found a solution for this?

[iduuck]

Sorry for digging this issue out, but I just searched for the solution, and since this is an open issue which has not been closed since, I wanted to share the solution for the people suffering of this problem:

For me, the problem was, that I just set up a new Mac and hence didn't had rubocop installed globally. So, this was the first issue. I think that this is a fundamental issue with Neoformat? The second problem was a mis-configuration in the .rubocop.yml (which appearantly was a wrong target version.

So this said, I don't know, if this is an issue, which needs to be addressed by rubocop, or by the neoformat.