Neovim

Neovim setup and general info

Updated: 25 September 2023

Installation

The following need to be installed to use Neovim with Plugins

I had an issue installing vim-plug that ended up putting the config into the wrong folder, just ensure that ~/.vim/autoload contents are copied to ~/.config/nvim/autoload if nvim can’t find the plug function - create the .config/nvim directory if it doesn’t exist

Setup

Vim Plug

Vim Plug GitHub

First, create a ~/.config/nvim/init.vim file if it doesn’t already exist, and add the following to setup vim-plug

init.vim

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call plug#begin(stdpath('data') . '/plugged')
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" Plugins will be defined in this block
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call plug#end()

After adding a plugin and saving (:w), you will need to reload the nvim config:

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:source path/to/nvim.init

And then install the plugins again with:

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:PlugInstall

CoC

CoC GitHub

CoC is a Vim plugin for code completion, it can be installed using Plug like so:

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call plug#begin(stdpath('data') . '/plugged')
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" Plugins will be defined in this block
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Plug 'neoclide/coc.nvim', {'branch': 'release'}
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call plug#end()

Next, run nvim and install the relevant language servers, for example we can install ts, eslint, prettier, and json support like so:

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:CocInstall coc-json coc-tsserver

Alternatively, you can add the CoC extensions into the init.vim file like so:

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let g:coc_global_extensions = [ 'coc-tsserver', 'coc-eslint', 'coc-prettier', 'coc-json' ]

The relevant CoC extensions will be automatically installed the next time you open an editor if they aren’t already

Key Bindings/Mappings

We can add keybindings for CoC by copying the base keybindings from their documentation, you can also see them below:

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" Set internal encoding of vim, not needed on neovim, since coc.nvim using some
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" unicode characters in the file autoload/float.vim
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set encoding=utf-8
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" TextEdit might fail if hidden is not set.
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set hidden
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" Some servers have issues with backup files, see #649.
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set nobackup
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set nowritebackup
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" Give more space for displaying messages.
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set cmdheight=2
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" Having longer updatetime (default is 4000 ms = 4 s) leads to noticeable
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" delays and poor user experience.
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set updatetime=300
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" Don't pass messages to |ins-completion-menu|.
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set shortmess+=c
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" Always show the signcolumn, otherwise it would shift the text each time
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" diagnostics appear/become resolved.
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if has("nvim-0.5.0") || has("patch-8.1.1564")
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  " Recently vim can merge signcolumn and number column into one
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  set signcolumn=number
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else
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  set signcolumn=yes
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endif
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" Use tab for trigger completion with characters ahead and navigate.
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" NOTE: Use command ':verbose imap <tab>' to make sure tab is not mapped by
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" other plugin before putting this into your config.
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inoremap <silent><expr> <TAB>
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      \ pumvisible() ? "\<C-n>" :
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      \ CheckBackspace() ? "\<TAB>" :
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      \ coc#refresh()
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inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"
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function! CheckBackspace() abort
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  let col = col('.') - 1
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  return !col || getline('.')[col - 1]  =~# '\s'
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endfunction
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" Use <c-space> to trigger completion.
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if has('nvim')
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  inoremap <silent><expr> <c-space> coc#refresh()
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else
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  inoremap <silent><expr> <c-@> coc#refresh()
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endif
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" Make <CR> auto-select the first completion item and notify coc.nvim to
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" format on enter, <cr> could be remapped by other vim plugin
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inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm()
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                              \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"
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" Use `[g` and `]g` to navigate diagnostics
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" Use `:CocDiagnostics` to get all diagnostics of current buffer in location list.
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nmap <silent> [g <Plug>(coc-diagnostic-prev)
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nmap <silent> ]g <Plug>(coc-diagnostic-next)
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" GoTo code navigation.
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nmap <silent> gd <Plug>(coc-definition)
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nmap <silent> gy <Plug>(coc-type-definition)
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nmap <silent> gi <Plug>(coc-implementation)
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nmap <silent> gr <Plug>(coc-references)
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" Use K to show documentation in preview window.
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nnoremap <silent> K :call ShowDocumentation()<CR>
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function! ShowDocumentation()
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  if CocAction('hasProvider', 'hover')
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    call CocActionAsync('doHover')
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  else
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    call feedkeys('K', 'in')
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  endif
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endfunction
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" Highlight the symbol and its references when holding the cursor.
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autocmd CursorHold * silent call CocActionAsync('highlight')
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" Symbol renaming.
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nmap <leader>rn <Plug>(coc-rename)
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" Formatting selected code.
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xmap <leader>f  <Plug>(coc-format-selected)
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nmap <leader>f  <Plug>(coc-format-selected)
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augroup mygroup
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  autocmd!
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  " Setup formatexpr specified filetype(s).
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  autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected')
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  " Update signature help on jump placeholder.
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  autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')
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augroup end
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" Applying codeAction to the selected region.
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" Example: `<leader>aap` for current paragraph
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xmap <leader>a  <Plug>(coc-codeaction-selected)
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nmap <leader>a  <Plug>(coc-codeaction-selected)
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" Remap keys for applying codeAction to the current buffer.
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nmap <leader>ac  <Plug>(coc-codeaction)
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" Apply AutoFix to problem on the current line.
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nmap <leader>qf  <Plug>(coc-fix-current)
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" Run the Code Lens action on the current line.
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nmap <leader>cl  <Plug>(coc-codelens-action)
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" Map function and class text objects
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" NOTE: Requires 'textDocument.documentSymbol' support from the language server.
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xmap if <Plug>(coc-funcobj-i)
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omap if <Plug>(coc-funcobj-i)
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xmap af <Plug>(coc-funcobj-a)
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omap af <Plug>(coc-funcobj-a)
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xmap ic <Plug>(coc-classobj-i)
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omap ic <Plug>(coc-classobj-i)
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xmap ac <Plug>(coc-classobj-a)
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omap ac <Plug>(coc-classobj-a)
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" Remap <C-f> and <C-b> for scroll float windows/popups.
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if has('nvim-0.4.0') || has('patch-8.2.0750')
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  nnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
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  nnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
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  inoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(1)\<cr>" : "\<Right>"
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  inoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(0)\<cr>" : "\<Left>"
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  vnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
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  vnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
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endif
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" Use CTRL-S for selections ranges.
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" Requires 'textDocument/selectionRange' support of language server.
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nmap <silent> <C-s> <Plug>(coc-range-select)
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xmap <silent> <C-s> <Plug>(coc-range-select)
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" Add `:Format` command to format current buffer.
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command! -nargs=0 Format :call CocActionAsync('format')
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" Add `:Fold` command to fold current buffer.
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command! -nargs=? Fold :call     CocAction('fold', <f-args>)
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" Add `:OR` command for organize imports of the current buffer.
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command! -nargs=0 OR   :call     CocActionAsync('runCommand', 'editor.action.organizeImport')
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" Add (Neo)Vim's native statusline support.
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" NOTE: Please see `:h coc-status` for integrations with external plugins that
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" provide custom statusline: lightline.vim, vim-airline.
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set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}
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" Mappings for CoCList
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" Show all diagnostics.
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nnoremap <silent><nowait> <space>a  :<C-u>CocList diagnostics<cr>
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" Manage extensions.
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nnoremap <silent><nowait> <space>e  :<C-u>CocList extensions<cr>
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" Show commands.
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nnoremap <silent><nowait> <space>c  :<C-u>CocList commands<cr>
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" Find symbol of current document.
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nnoremap <silent><nowait> <space>o  :<C-u>CocList outline<cr>
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" Search workspace symbols.
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nnoremap <silent><nowait> <space>s  :<C-u>CocList -I symbols<cr>
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" Do default action for next item.
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nnoremap <silent><nowait> <space>j  :<C-u>CocNext<CR>
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" Do default action for previous item.
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nnoremap <silent><nowait> <space>k  :<C-u>CocPrev<CR>
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" Resume latest coc list.
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nnoremap <silent><nowait> <space>p  :<C-u>CocListResume<CR>

Additionally, you can add the following for some spacing preferences and line numbers:

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" tab size
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set tabstop=2
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set shiftwidth=2
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" spaces instead of tab
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set expandtab
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" show line numbers
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set number

Themes

You can use Vim themes by downliading them and adding to the ~/.config/nvim/colors folder. For example, you can use the Molokai Theme

Then, use the :Colors command to select at theme - this should automatically load any themes in the colors directory as available

You can also set a default theme like so:

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" Molokai theme options
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colorscheme molokai

FZF

FZF.vim GitHub

FZF Is a Command Line Fuzzy Search and can be installed in the init.vim file like so:

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Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
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Plug 'junegunn/fzf.vim'

I’m using this along with the below settings:

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" FZF settings
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" Open at bottom 40% of screen
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let g:fzf_layout = { 'down': '~40%' }

After that, resource and install plugins, and then you can use the following commands:

Command	Description
`:Files`	Search all Files
`:GFiles`	Search all Git Tracked Files
`:Buffers`	View Open Buffers
`:Rg`	Search in Files (see below)

You can then search for files and press enter to open a file

Adding a ! to the end of the FZF Command will open the search window in full screen

Additionally, we can use ripgrep via the :Rg command to search for text content inside of files

It should also be noted that unless bat is installed, you will not have syntax highlighting in the FZF search results

NERDTree

:NERDTree provides a file explorer within NVIM

Command	Description
`:NERDTree`	Open the file explorer
`?`	View Help
`m`	Open the file manu

Note that NERDTree can also be used from the :Explore menu by using :Explore followed by x (special option) which will launch NERDTree in place of the explore but will be in the file context so you can do things like create files, etc. more easily

Useful Keybindings

Shortcut	Description
`[space] c`	View Commands w/ Search
`[space] a`	View Language Server Errors
`\f [enter]`	Format File
`\rn`	Rename Symbol
`gd`	Go to Definition
`gr`	Go to References
`\a`	Code Action
`[g`	Previous Error
`]g`	Next Error
`qf`	Code Fix
`[ctr] [space]`	View Suggestions
`[shift] k`	View Code Doc
`[space] o`	View Symbols
`[ctrl] t`	From GFiles View, open in new tab
`gt` `gT`	Go to next tab/previous tab

Using NuShell with Vim

You can configure Nushell with Vim using Lua config as:

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-- setting the shell to use "nu" - all of these are required for correct behaviour
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-- not setting all the below options will break the `:!command` mode in vim
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vim.opt.shell = 'nu'
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vim.opt.shellcmdflag = '-c'
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vim.opt.shellquote = ""
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vim.opt.shellxquote = ""