1、依赖环境

安装nodejs，直接安装最新的LTS版本

https://nodejs.org/en

ps：linux下面需要手动安装（具体方法百度一下）

装好之后用node -v 和 npm -v检查是否安装成功

安装clangd
Release LLVM 16.0.0 · llvm/llvm-project · GitHub

windows下面直接用exe安装，ubuntu和debian可以用apt安装

安装python，用pip安装compliedb（这一步可选，这是用来从makefile直接生成编译库文件的python脚本而不需要依赖cmake，如果你使用的是cmake那可以跳过这步，用cmake直接生成编译库文件）

2、安装coc

在vimrc文件里添加插件然后执行安装，我用的vundle，其他插件管理器自行百度。

在call vundle#begin 与call vundle#end 之间插入 Plugin 'neoclide/coc.nvim', {'branch': 'release'}

然后在执行vim里执行:PluginInstall，等待安装完成。

这时候可能会提醒你需要编译coc（网上说能直接用，但我在ubuntu和win11上面都需要重新编译一边）。

前往vim文件所在的文件夹

· linux下面一般是~/.vim

·windows下面是~/vimfiles

找到bundle文件夹下面的coc.nvim，进入这个文件夹然后在命令行执行npm install，如果报错按照提示操作。

编译完之后回到vim执行CocInfo查看Coc服务是否正常启动：

## versions   
                                                                                                                                                                                                         
vim version: VIM - Vi IMproved 8.2 8024919                                                                                                                                                                             
node version: v18.17.0                                                                                                                                                                                                  
coc.nvim version: 0.0.82-fab97c7d 2023-08-08 14:59:18 +0800                                                                                                                                                           
coc.nvim directory: /home/robot/.vim/bundle/coc.nvim                                                                                                                                                                  
term: dumb                                                                                                                                                                                                            
platform: linux                                                                                                                                                                                                                                                                                                             
## Log of coc.nvim                                                                                                                                                                                                     
2023-08-14T13:47:50.729 INFO (pid:8147) [configurations] - Add folder configuration from cwd: /home/robot/.vim/bundle/coc.nvim/.vim/coc-settings.json                                                                                                                                                                         
2023-08-14T13:47:50.797 INFO (pid:8147) [extension:coc-git] - Looking for git in: git                                                                                                            
2023-08-14T13:47:50.831 INFO (pid:8147) [plugin] - coc.nvim initialized with node: v18.17.0 after 143                                                                                                         
2023-08-14T13:47:55.018 INFO (pid:8147) [attach] - receive notification: showInfo []                                                                                                             
2023-08-14T13:47:55.375 INFO (pid:8147) [attach] - receive notification: highlight []                                           
2023-08-14T13:48:00.240 INFO (pid:8147) [attach] - receive notification: highlight []                                                                                             
2023-08-14T13:48:02.152 INFO (pid:8147) [attach] - receive notification: showInfo [] 

3、装点插件

在vim里执行

CocInstall coc-syntax coc-highlight coc-clangd coc-tsserver

其他插件可以在官方github的wiki页面找到。

https://github.com/neoclide/coc.nvim/wiki/Using-coc-extensions#manage-coc-extensions

关于语言支持类的插件（我这就只装了coc-clangd）有两点：1、装了插件就不需要在CocConfig里面配置相关的语言支持了，会冲突。2、有些语言插件需要依赖外部语言服务器支持（比如这里安装的clangd），有些直接装上就能用LLVM好像内部默认支持。

CocConfig里面建议配置一句话（vim里直接执行CocConfig就能打开，默认是空的）：

{
    "suggest.noselect": true 
}

不加这个就会无法选中补全的第一个选项，可能是我没配置好？

最后在vimrc里面设置一下coc快捷键配置，官方有参考配置，直接copy之后按照你自己的习惯改改就行了：

" May need for Vim (not Neovim) since coc.nvim calculates byte offset by count
" utf-8 byte sequence
set encoding=utf-8
" Some servers have issues with backup files, see #649
set nobackup
set nowritebackup

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

" Always show the signcolumn, otherwise it would shift the text each time
" diagnostics appear/become resolved
set signcolumn=yes

" Use tab for trigger completion with characters ahead and navigate
" NOTE: There's always complete item selected by default, you may want to enable
" no select by `"suggest.noselect": true` in your configuration file
" 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>
      \ coc#pum#visible() ? coc#pum#next(1) :
      \ CheckBackspace() ? "\<Tab>" :
      \ coc#refresh()
inoremap <expr><S-TAB> coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"

" Make <CR> to accept selected completion item or notify coc.nvim to format
" <C-g>u breaks current undo, please make your own choice
inoremap <silent><expr> <CR> coc#pum#visible() ? coc#pum#confirm()
                              \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

function! CheckBackspace() 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

" 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 <Plug>(coc-references)

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

function! ShowDocumentation()
  if CocAction('hasProvider', 'hover')
    call CocActionAsync('doHover')
  else
    call feedkeys('K', 'in')
  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 code actions to the selected code block
" Example: `<leader>aap` for current paragraph
xmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap keys for applying code actions at the cursor position
nmap <leader>ac  <Plug>(coc-codeaction-cursor)
" Remap keys for apply code actions affect whole buffer
nmap <leader>as  <Plug>(coc-codeaction-source)
" Apply the most preferred quickfix action to fix diagnostic on the current line
nmap <leader>qf  <Plug>(coc-fix-current)

" Remap keys for applying refactor code actions
nmap <silent> <leader>re <Plug>(coc-codeaction-refactor)
xmap <silent> <leader>r  <Plug>(coc-codeaction-refactor-selected)
nmap <silent> <leader>r  <Plug>(coc-codeaction-refactor-selected)

" Run the Code Lens action on the current line
nmap <leader>cl  <Plug>(coc-codelens-action)

" 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> to 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 CocActionAsync('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     CocActionAsync('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>