substitue old deoplete plugins with coc

init.vim

@@ -18,7 +18,7 @@ Plug 'tpope/vim-dispatch' " Needed for dadbod
 Plug 'scrooloose/nerdtree', { 'on': 'NERDTreeToggle' } " file tree
 Plug 'Xuyuanp/nerdtree-git-plugin', { 'on': 'NERDTreeToggle' }
 Plug 'scrooloose/nerdcommenter' " better commenting
-Plug 'Shougo/deoplete.nvim', { 'do': ':UpdateRemotePlugins' } " completion engine
+Plug 'neoclide/coc.nvim', {'branch': 'release'} " coc - completion
 Plug 'Shougo/neosnippet.vim' " snippet engine
 Plug 'Shougo/neosnippet-snippets' " snippets
 Plug 'easymotion/vim-easymotion' " better motion with leader
@@ -48,12 +48,10 @@ Plug 'moll/vim-node', { 'for': [ 'javascript', 'vue' ]} " node support
 Plug 'https://github.com/othree/jspc.vim', { 'for': [ 'javascript', 'vue' ]} " Function parameter completion
 Plug 'heavenshell/vim-jsdoc', { 'for': [ 'javascript', 'vue' ]} " Generate JSDoc comments
 Plug 'posva/vim-vue', { 'for': [ 'javascript', 'html', 'vue' ] } " vue.js integration
-Plug 'carlitux/deoplete-ternjs', { 'for': [ 'javascript', 'vue', 'html' ], 'do': 'npm install -g tern' } " deoplete completion via ternjs
 "}}}
 
 " Go {{{
 Plug 'fatih/vim-go', { 'for': [ 'go', 'html', 'gohtmltmpl' ], 'do': ':GoInstallBinaries' } " go support
-Plug 'zchee/deoplete-go', { 'for': 'go' }
 "}}}
 
 " LaTeX{{{
@@ -85,10 +83,6 @@ Plug 'rhysd/vim-clang-format', { 'for' : ['c', 'cpp', 'java'] }
 "}}}
 
 " PHP{{{
-"Plug 'shawncplus/phpcomplete.vim', { 'for': 'php', 'do': 'curl -Ss http://vim-php.com/phpctags/install/phpctags.phar > ~/bin/phpctags && chmod +x ~/bin/phpctags' }
-"Plug 'lvht/phpcd.vim', { 'for': 'php', 'do': 'composer install' }
-Plug 'phpactor/phpactor', {'for': 'php', 'do': 'composer install'}
-Plug 'kristijanhusak/deoplete-phpactor', { 'for': 'php' }
 Plug 'captbaritone/better-indent-support-for-php-with-html', { 'for': 'php' }
 Plug 'lumiliet/vim-twig', { 'for': [ 'php', 'html' ] } " Twig templates
 Plug 'Rican7/php-doc-modded', { 'for': 'php' } " Automatic phpdoc comments
@@ -108,10 +102,6 @@ Plug 'artur-shaik/vim-javacomplete2', { 'for': 'java' }
 Plug 'vim-scripts/mips.vim'
 "}}}
 
-" Rust {{{
-Plug 'sebastianmarkow/deoplete-rust', {'for': 'rust' }
-"}}}
-
 " All of your Plugins must be added before the following line
 call plug#end()            " required
 filetype plugin indent on    " required
@@ -257,28 +247,128 @@ autocmd FileType c,cpp,objc vnoremap <buffer><Leader>f :ClangFormat<CR>
 "}}}
 
 " Completion {{{
-" Use deoplete.
-let g:deoplete#enable_at_startup = 1
-
-" Use TAB to cycle between matches
-inoremap <silent><expr><tab> pumvisible() ? "\<c-n>" : "\<tab>"
-inoremap <silent><expr><s-tab> pumvisible() ? "\<c-p>" : "\<s-tab>"
-
-let g:deoplete#ignore_sources = get(g:, 'deoplete#ignore_sources', {})
-let g:deoplete#ignore_sources.php = ['omni']
-
-" Neosnippet Settings
-imap <C-k>     <Plug>(neosnippet_expand_or_jump)
-smap <C-k>     <Plug>(neosnippet_expand_or_jump)
-xmap <C-k>     <Plug>(neosnippet_expand_target)
-
-" SuperTab like snippets behavior.
-"imap <expr><TAB>
-" \ pumvisible() ? "\<C-n>" :
-" \ neosnippet#expandable_or_jumpable() ?
-" \    "\<Plug>(neosnippet_expand_or_jump)" : "\<TAB>"
-smap <expr><TAB> neosnippet#expandable_or_jumpable() ?
-            \ "\<Plug>(neosnippet_expand_or_jump)" : "\<TAB>"
+
+" if hidden is not set, TextEdit might fail.
+set hidden
+
+" Some servers have issues with backup files, see #649
+set nobackup
+set nowritebackup
+
+" Better display for messages
+set cmdheight=2
+
+" You will have bad experience for diagnostic messages when it's default 4000.
+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> to trigger completion.
+inoremap <silent><expr> <c-space> coc#refresh()
+
+" Use <cr> to 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` to 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 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>')
+  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
+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
+
+" Remap for do codeAction of selected region, ex: `<leader>aap` for current paragraph
+xmap <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 <tab> for select selections ranges, needs server support, like: coc-tsserver, coc-python
+nmap <silent> <TAB> <Plug>(coc-range-select)
+xmap <silent> <TAB> <Plug>(coc-range-select)
+xmap <silent> <S-TAB> <Plug>(coc-range-select-backword)
+
+" Use `:Format` to format current buffer
+command! -nargs=0 Format :call CocAction('format')
+
+" Use `:Fold` to fold current buffer
+command! -nargs=? Fold :call     CocAction('fold', <f-args>)
+
+" use `:OR` for organize import of current buffer
+command! -nargs=0 OR   :call     CocAction('runCommand', 'editor.action.organizeImport')
+
+" Add status line support, for integration with other plugin, checkout `:h coc-status`
+set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}
+
+" 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>:
 
 " For conceal markers.
 if has('conceal')