[Feature request] Support gopls daemon mode

[luisdavim]

It would be a nice performance improvement if vim-go could support talking to a daemon gopls or maybe even managing the daemon instance so other plugins like coc.vim or YouCompleteMe can use it.

Some relevant links

• https://github.com/golang/tools/blob/master/gopls/doc/daemon.md
• x/tools/gopls: add support for multiple concurrent clients golang/go#34111
• Share gopls instance with ycm #2421

[luisdavim]

Looks like all we have to do is to add -remote=auto to the gopls args, maybe all we need is to document this, here's an example with coc.nvim

vim-go relevant config:

  let g:go_gopls_enabled = 1
  let g:go_gopls_options = ['-remote=auto']
  let g:go_def_mode='gopls'
  let g:go_info_mode='gopls'
  let g:go_referrers_mode = 'gopls'

and got coc.nvim:

  "languageserver": {
    "golang": {
      "command": "gopls",
      "args": ["-remote=auto"],
      "rootPatterns": ["go.mod", ".vim/", ".git/", ".hg/"],
      "filetypes": ["go"]
    }
  }

[bhcleek]

Thank you for the suggestion.

Yes, this is already suported by using g:go_gopls_options; -remote=auto was one of the motivations for adding g:go_gopls_options. I don't intend to document it explicitly, because I intend to make the default for g:go_gopls_options be -remote=auto by the next release. I've been running my machine like since gopls v0.3.3 came out.

[ghost]

@luisdavim Something I am doing is not working so I opened this issue.

[ericwq]

see this for the reason.