nvim: use coc

config/fish/conf.d/fisher.fish

@@ -1 +0,0 @@
-fisher copy-user-key-bindings

vimrc

@@ -107,8 +107,7 @@ Plug '~/dgapt', { 'rtp': 'vim' }
 " Plug '~/lean.vim'
 Plug 'leanprover/lean.vim'
 
-Plug 'autozimu/LanguageClient-neovim', { 'do': ':UpdateRemotePlugins' }
-Plug 'Shougo/echodoc.vim'
+Plug 'neoclide/coc.nvim', {'do': { -> coc#util#install()}}
 
 Plug 'rickhowe/diffchar.vim'
 
@@ -134,6 +133,8 @@ set vb                          " turn on the "visual bell" - which is much quie
 set nobackup
 se bs=2
 
+set backupcopy=yes
+
 se inccommand=nosplit
 
 set mouse=
@@ -201,3 +202,65 @@ augroup my_cm_setup
 	\ })
 augroup END
 
+" coc.nvim
+
+
+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>)