Neovim configuration

.vimrc

set tabstop=2
set shiftwidth=2
set expandtab
set number
set so=5
set nocompatible      " We're running Vim, not Vi!
syntax on             " Enable syntax highlighting
filetype on           " Enable filetype detection
filetype indent on    " Enable filetype-specific indenting
filetype plugin on    " Enable filetype-specific plugins

call plug#begin()
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'sheerun/vim-polyglot'
Plug 'tpope/vim-fugitive'
Plug 'tpope/vim-commentary'
Plug 'tpope/vim-surround'
Plug 'vim-airline/vim-airline'
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
Plug 'junegunn/fzf.vim'
Plug 'vim-ruby/vim-ruby'
Plug 'tpope/vim-rails'
Plug 'scrooloose/nerdtree'
Plug 'fatih/vim-go'
" Plug 'herringtondarkholme/yats.vim'
Plug 'styled-components/vim-styled-components', { 'branch': 'main' }
Plug 'Xuyuanp/nerdtree-git-plugin'
Plug 'alvan/vim-closetag'
Plug 'sainnhe/everforest'
call plug#end()

colorscheme everforest

" common
" move lines using Alt
nnoremap <A-j> :m .+1<CR>==
nnoremap <A-k> :m .-2<CR>==
inoremap <A-j> <Esc>:m .+1<CR>==gi
inoremap <A-k> <Esc>:m .-2<CR>==gi
vnoremap <A-j> :m '>+1<CR>gv=gv
vnoremap <A-k> :m '<-2<CR>gv=gv

" fzf
nnoremap <expr> <C-p> isdirectory(".git") ? ":GFiles<CR>" : ":Files<CR>" 

" nerdtree
let NERDTreeShowHidden=1

inoremap <expr> <Tab> pumvisible() ? "\<C-n>" : "\<Tab>"
inoremap <expr> <S-Tab> pumvisible() ? "\<C-p>" : "\<S-Tab>"
inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"
let g:NERDTreeIgnore = ['^node_modules$', '^venv$']
" Exit Vim if NERDTree is the only window remaining in the only tab.
autocmd BufEnter * if tabpagenr('$') == 1 && winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() | quit | endif
nnoremap <leader>n :NERDTreeFocus<CR>
nnoremap <C-n> :NERDTree<CR>
nnoremap <C-b> :NERDTreeToggle<CR>
nnoremap <C-f> :NERDTreeFind<CR>

" coc
let g:go_gopls_options = ['-remote=auto']
let g:go_def_mapping_enabled = 0
let g:coc_global_extensions = ['coc-json', 'coc-git', 'coc-solargraph', 'coc-tsserver', 'coc-prettier', 'coc-pairs', 'coc-eslint', 'coc-pyright', 'coc-html', 'coc-css', 'coc-styled-components']
" Some servers have issues with backup files, see #649.
set nobackup
set nowritebackup

" Give more space for displaying messages.
set cmdheight=2

" Having longer updatetime (default is 4000 ms = 4 s) leads to noticeable
" delays and poor user experience.
set updatetime=300

" Don't pass messages to |ins-completion-menu|.
set shortmess+=c

" Always show the signcolumn, otherwise it would shift the text each time
" diagnostics appear/become resolved.
if has("nvim-0.5.0") || has("patch-8.1.1564")
  " Recently vim can merge signcolumn and number column into one
  set signcolumn=number
else
  set signcolumn=yes
endif

" Use tab for trigger completion with characters ahead and navigate.
" NOTE: Use command ':verbose imap <tab>' to make sure tab is not mapped by
" other plugin before putting this into your config.
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> to trigger completion.
if has('nvim')
  inoremap <silent><expr> <c-space> coc#refresh()
else
  inoremap <silent><expr> <c-@> coc#refresh()
endif

" Make <CR> auto-select the first completion item and notify coc.nvim to
" format on enter, <cr> could be remapped by other vim plugin
inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm()
                              \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

" Use `[g` and `]g` to navigate diagnostics
" Use `:CocDiagnostics` to get all diagnostics of current buffer in location list.
nmap <silent> [g <Plug>(coc-diagnostic-prev)
nmap <silent> ]g <Plug>(coc-diagnostic-next)

" GoTo code navigation.
nmap <silent> gd <Plug>(coc-definition)
nmap <silent> gy <Plug>(coc-type-definition)
nmap <silent> gi <Plug>(coc-implementation)
nmap <silent> gr <Plg>(coc-references)

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

function! s:show_documentation()
  if (index(['vim','help'], &filetype) >= 0)
    execute 'h '.expand('<cword>')
  elseif (coc#rpc#ready())
    call CocActionAsync('doHover')
  else
    execute '!' . &keywordprg . " " . expand('<cword>')
  endif
endfunction

" Highlight the symbol and its references when holding the cursor.
autocmd CursorHold * silent call CocActionAsync('highlight')

" Symbol renaming.
nmap <leader>rn <Plug>(coc-rename)

" Formatting selected code.
xmap <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

" Applying codeAction to the selected region.
" Example: `<leader>aap` for current paragraph
xmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap keys for applying codeAction to the current buffer.
nmap <leader>ac  <Plug>(coc-codeaction)
" Apply AutoFix to problem on the current line.
nmap <leader>qf  <Plug>(coc-fix-current)

" Map function and class text objects
" NOTE: Requires 'textDocument.documentSymbol' support from the language server.
xmap if <Plug>(coc-funcobj-i)
omap if <Plug>(coc-funcobj-i)
xmap af <Plug>(coc-funcobj-a)
omap af <Plug>(coc-funcobj-a)
xmap ic <Plug>(coc-classobj-i)
omap ic <Plug>(coc-classobj-i)
xmap ac <Plug>(coc-classobj-a)
omap ac <Plug>(coc-classobj-a)

" Remap <C-f> and <C-b> for scroll float windows/popups.
" if has('nvim-0.4.0') || has('patch-8.2.0750')
"   nnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
"   nnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
"   inoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(1)\<cr>" : "\<Right>"
"   inoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(0)\<cr>" : "\<Left>"
"   vnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
"   vnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
" endif

" Use CTRL-S for selections ranges.
" Requires 'textDocument/selectionRange' support of language server.
nmap <silent> <C-s> <Plug>(coc-range-select)
xmap <silent> <C-s> <Plug>(coc-range-select)

" Add `:Format` command to format current buffer.
command! -nargs=0 Format :call CocAction('format')

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

" Add `:OR` command for organize imports of the current buffer.
command! -nargs=0 OR   :call     CocAction('runCommand', 'editor.action.organizeImport')

" Add (Neo)Vim's native statusline support.
" NOTE: Please see `:h coc-status` for integrations with external plugins that
" provide custom statusline: lightline.vim, vim-airline.
set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}

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

" vim-airline
let g:airline#extensions#branch#enabled=1

" vim-closetag
let g:closetag_filetypes = 'html,jsx,tsx,erb'
let g:closetag_regions = {
    \ 'typescript.tsx': 'jsxRegion,tsxRegion',
    \ 'javascript.jsx': 'jsxRegion',
    \ 'typescriptreact': 'jsxRegion,tsxRegion',
    \ 'javascriptreact': 'jsxRegion',
    \ }
" Add > at current position without closing the current tag, default is ''
let g:closetag_close_shortcut = '<leader>>'

" " Copy to clipboard
vnoremap  <leader>y  "+y
nnoremap  <leader>Y  "+yg_
nnoremap  <leader>y  "+y
nnoremap  <leader>yy  "+yy

" " Paste from clipboard
nnoremap <leader>p "+p
nnoremap <leader>P "+P
vnoremap <leader>p "+p
vnoremap <leader>P "+P

" " Tabbing (actual tab, not whitespace)
nnoremap tt  :tabedit<Space>
nnoremap tm  :tabm<Space>
nnoremap td  :tabclose<CR>
nnoremap th :tabnext<CR>
nnoremap tl :tabprev<CR>
nnoremap tn :tabnew<CR>

" Disable CAPLOCK
" Execute 'lnoremap x X' and 'lnoremap X x' for each letter a-z.
for c in range(char2nr('A'), char2nr('Z'))
  execute 'lnoremap ' . nr2char(c+32) . ' ' . nr2char(c)
  execute 'lnoremap ' . nr2char(c) . ' ' . nr2char(c+32)
endfor
" Kill the capslock when leaving insert mode.
" autocmd InsertLeave * set iminsert=0u

function! OpenFloatTerm()
  let height = float2nr((&lines - 2) / 1.5)
  let row = float2nr((&lines - height) / 2)
  let width = float2nr(&columns / 1.5)
  let col = float2nr((&columns - width) / 2)
  " Border Window
  let border_opts = {
    \ 'relative': 'editor',
    \ 'row': row - 1,
    \ 'col': col - 2,
    \ 'width': width + 4,
    \ 'height': height + 2,
    \ 'style': 'minimal'
    \ }
  let border_buf = nvim_create_buf(v:false, v:true)
  let s:border_win = nvim_open_win(border_buf, v:true, border_opts)
  " Main Window
  let opts = {
    \ 'relative': 'editor',
    \ 'row': row,
    \ 'col': col,
    \ 'width': width,
    \ 'height': height,
    \ 'style': 'minimal'
    \ }
  let buf = nvim_create_buf(v:false, v:true)
  let win = nvim_open_win(buf, v:true, opts)
  terminal
  startinsert
  " Hook up TermClose event to close both terminal and border windows
  autocmd TermClose * ++once :q | call nvim_win_close(s:border_win, v:true)
endfunction

nnoremap te :call OpenFloatTerm()<CR>

coc-settings.json

{
  "eslint.autoFixOnSave": true,
  "suggest.noselect": false,
  "diagnostic.errorSign": "✘",
  "diagnostic.warningSign": "!",
  "diagnostic.infoSign": "?",
  "diagnostic.checkCurrentLine": true,
  "typescript.preferences.importModuleSpecifier": "relative",
  "coc.preferences.formatOnSaveFiletypes": [
    "javascript",
    "html",
    "json",
    "css",
    "scss",
    "go",
    "typescript",
    "python"
  ],
  "languageserver": {
    "golang": {
      "command": "gopls",
      "rootPatterns": ["go.mod"],
      "filetypes": ["go"],
      "args": ["-remote=auto"]
    }
  }
}