neovim configuration

coc-settings.json

{
  "coc.preferences.formatOnSaveFiletypes": ["go"],
  "coc.preferences.diagnostic.infoSign": "ℹ",
  "coc.preferences.diagnostic.hintSign": "ℹ",
  "languageserver": {
    "golang": {
      "command": "gopls",
      "rootPatterns": ["go.mod"],
      "filetypes": ["go"]
    }
  }
}

init.vim

call plug#begin()
    Plug 'HerringtonDarkholme/yats.vim'

	"Plug 'Shougo/deoplete.nvim', { 'do': ':UpdateRemotePlugins' }
	"let g:deoplete#enable_at_startup = 1

	"Plug 'zchee/deoplete-jedi'

    Plug 'Shougo/denite.nvim'

	"Plug 'w0rp/ale'

    Plug 'eagletmt/neco-ghc'

	function! BuildComposer(info)
	  if a:info.status != 'unchanged' || a:info.force
		if has('nvim')
		  !cargo build --release
		else
		  !cargo build --release --no-default-features --features json-rpc
		endif
	  endif
	endfunction

	"Plug 'euclio/vim-markdown-composer', { 'do': function('BuildComposer') }

    Plug 'junegunn/goyo.vim'

    Plug 'junegunn/limelight.vim'

    Plug 'junegunn/seoul256.vim'

    Plug 'neoclide/coc.nvim', {'tag': '*', 'do': {-> coc#util#install()}}
call plug#end()

let mapleader = ","

syntax enable
"set completeopt-=preview
set expandtab
set tabstop=4
set shiftwidth=4
set smartindent
set background=dark

let g:haskellmode_completion_ghc = 0
autocmd FileType haskell setlocal omnifunc=necoghc#omnifunc

autocmd BufNewFile,BufRead *.ts setlocal filetype=typescript

autocmd Filetype javascript setlocal expandtab tabstop=2 shiftwidth=2
autocmd Filetype haskell setlocal expandtab tabstop=2 shiftwidth=2
autocmd FileType yaml setlocal expandtab tabstop=2 shiftwidth=2

" GOYO
" ----------------------------------------------------------------------------------------
let g:goyo_width = 68

function! s:goyo_enter()   " On goyo enter:
  set noshowcmd            " Don't show last command
  set noshowmode           " Don't show current mode
  set scrolloff=999        " Centre current line
  Limelight                " Enable paragraph focus mode
  "colo seoul256-light
  let &l:statusline = '%M' " Show modified state on the bottom of the screen
                           " This automatically disables on Goyo leave
  hi StatusLine
        \ ctermfg=137
        \ guifg=#be9873
        \ cterm=NONE
        \ gui=NONE
endfunction

function! s:goyo_leave() " On goyo exit:
  set showcmd            " Show last command
  set showmode           " Show current mode
  set scrolloff=1        " Always show one line of context around the cursor
  Limelight!             " Disable paragraph focus mode
  colo default
endfunction

" Activate respective function on goyo enter and leave
autocmd! User GoyoEnter nested call <sid>goyo_enter()
autocmd! User GoyoLeave nested call <sid>goyo_leave()


" Limelight

let g:limelight_paragraph_span = 1  " Don't dim one par around the current one
let g:limelight_priority = -1 " Don't overrule hlsearch

let g:limelight_conceal_ctermfg = 'gray'
let g:limelight_conceal_ctermfg = 240

" Coc

" if hidden is not set, TextEdit might fail.
" set hidden

" Better display for messages
set cmdheight=2

" Smaller updatetime for CursorHold & CursorHoldI
set updatetime=300

" don't give |ins-completion-menu| messages.
set shortmess+=c

" always show signcolumns
set signcolumn=yes

" Use tab for trigger completion with characters ahead and navigate.
" Use command ':verbose imap <tab>' to make sure tab is not mapped by other plugin.
inoremap <silent><expr> <TAB>
      \ pumvisible() ? "\<C-n>" :
      \ <SID>check_back_space() ? "\<TAB>" :
      \ coc#refresh()
inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"

function! s:check_back_space() abort
  let col = col('.') - 1
  return !col || getline('.')[col - 1]  =~# '\s'
endfunction

" Use <c-space> for trigger completion.
inoremap <silent><expr> <c-space> coc#refresh()

" Use <cr> for confirm completion, `<C-g>u` means break undo chain at current position.
" Coc only does snippet and additional edit on confirm.
inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"

" Use `[c` and `]c` for navigate diagnostics
nmap <silent> [c <Plug>(coc-diagnostic-prev)
nmap <silent> ]c <Plug>(coc-diagnostic-next)

" Remap keys for gotos
nmap <silent> gd <Plug>(coc-definition)
nmap <silent> gy <Plug>(coc-type-definition)
nmap <silent> gi <Plug>(coc-implementation)
nmap <silent> gr <Plug>(coc-references)

" Use K for show documentation in preview window
nnoremap <silent> K :call <SID>show_documentation()<CR>

function! s:show_documentation()
  if &filetype == 'vim'
    execute 'h '.expand('<cword>')
  else
    call CocAction('doHover')
  endif
endfunction

" Highlight symbol under cursor on CursorHold
autocmd CursorHold * silent call CocActionAsync('highlight')

" Remap for rename current word
nmap <leader>rn <Plug>(coc-rename)

" Remap for format selected region
vmap <leader>f  <Plug>(coc-format-selected)
nmap <leader>f  <Plug>(coc-format-selected)

augroup mygroup
  autocmd!
  " Setup formatexpr specified filetype(s).
  autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected')
  " Update signature help on jump placeholder
  autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')
augroup end

" Remap for do codeAction of selected region, ex: `<leader>aap` for current paragraph
vmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap for do codeAction of current line
nmap <leader>ac  <Plug>(coc-codeaction)
" Fix autofix problem of current line
nmap <leader>qf  <Plug>(coc-fix-current)

" Use `:Format` for format current buffer
command! -nargs=0 Format :call CocAction('format')

" Use `:Fold` for fold current buffer
command! -nargs=? Fold :call     CocAction('fold', <f-args>)


" Add diagnostic info for https://github.com/itchyny/lightline.vim
let g:lightline = {
      \ 'colorscheme': 'wombat',
      \ 'active': {
      \   'left': [ [ 'mode', 'paste' ],
      \             [ 'cocstatus', 'readonly', 'filename', 'modified' ] ]
      \ },
      \ 'component_function': {
      \   'cocstatus': 'coc#status'
      \ },
      \ }



" Using CocList
" Show all diagnostics
nnoremap <silent> <space>a  :<C-u>CocList diagnostics<cr>
" Manage extensions
nnoremap <silent> <space>e  :<C-u>CocList extensions<cr>
" Show commands
nnoremap <silent> <space>c  :<C-u>CocList commands<cr>
" Find symbol of current document
nnoremap <silent> <space>o  :<C-u>CocList outline<cr>
" Search workspace symbols
nnoremap <silent> <space>s  :<C-u>CocList -I symbols<cr>
" Do default action for next item.
nnoremap <silent> <space>j  :<C-u>CocNext<CR>
" Do default action for previous item.
nnoremap <silent> <space>k  :<C-u>CocPrev<CR>
" Resume latest coc list
nnoremap <silent> <space>p  :<C-u>CocListResume<CR>