The init.vim I use for NeoVim

init.vim

"" INIT STUFF----------------------------------------------------------------
filetype indent on
set termguicolors
set mouse=a
set encoding=utf-8
set nohidden
set termguicolors

""" PYTHON
let g:python3_host_prog="/Users/hedonhermdev/VirtualEnvironments/nvim3/bin/python3.8"
let g:python2_host_prog="/Users/hedonhermdev/VirtualEnvironments/nvim3/bin/python2.7"

""" GENERAL OPTIONS

set title " Show the title of the file you are editing. 

" Numbering
set number
set relativenumber

" Tab == 4 spaces
set tabstop=4
set softtabstop=4
set shiftwidth=4
set expandtab
set smarttab
set autoindent

" Searching
set incsearch
set hlsearch
set ignorecase
set smartcase

" Code folding
set foldlevelstart=10
set foldnestmax=10

" Splitting
set splitright
set splitbelow

" Turn of swap files
set noswapfile
set nobackup
set nowb

" Highlight trailing spaces
highlight RedundantSpaces ctermbg=red guibg=red
match RedundantSpaces /\s\+$/

"" PLUGINS --------------------------------------------------------------------
filetype plugin on

call plug#begin()


" Aesthetics
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
Plug 'ryanoasis/vim-devicons'
Plug 'junegunn/goyo.vim'
Plug 'junegunn/limelight.vim'
Plug 'dracula/vim', { 'as': 'dracula' }

" Functionality
Plug 'tpope/vim-surround'
Plug 'tpope/vim-commentary'
Plug 'tpope/vim-fugitive'
Plug 'airblade/vim-gitgutter'
Plug 'tpope/vim-repeat'
Plug 'christoomey/vim-system-copy'
Plug 'scrooloose/nerdtree'
Plug 'janko/vim-test'
Plug 'Xuyuanp/nerdtree-git-plugin'

" Searching
Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --no-bash' }
Plug 'junegunn/fzf.vim'
Plug 'mileszs/ack.vim'
let g:ackprg = 'ag --nogroup --nocolor --column'

" Completion
Plug 'neoclide/coc.nvim', {'branch': 'release'}

" Language specific
Plug 'fatih/vim-go', {'do': ':GoUpdateBinaries'}
Plug 'sheerun/vim-polyglot'
Plug 'psf/black'
Plug 'dart-lang/dart-vim-plugin'


call plug#end()

"" COLORSCHEME --------------------------------------------------------------
colorscheme dracula

"" KEYBINDINGS ---------------------------------------------------------------
nnoremap j gj
nnoremap k gk

nnoremap B ^
nnoremap E $
nnoremap $ <nop>
nnoremap ^ <nop>

nnoremap <space> za

inoremap jk <esc>

nnoremap <C-J> <C-W><C-J>
nnoremap <C-K> <C-W><C-K>
nnoremap <C-L> <C-W><C-L>
nnoremap <C-H> <C-W><C-H>


" Keybindings for executing file based on filetype
autocmd filetype python nnoremap <buffer> <F5> :w<CR>:!clear;python %<CR>
autocmd filetype javascript nnoremap <buffer> <F5> :w<CR>:!clear;node %<CR>


" NERDTree
map <C-n> :NERDTreeToggle<CR>


""" PLUGIN CONFIGS -----------------------------------------------------------

" NERDTree configuration
let NERDTreeShowHidden=1
let g:NERDTreeDirArrowExpandable = '↠'
let g:NERDTreeDirArrowCollapsible = '‚Ü°'
autocmd StdinReadPre * let s:std_in=1
autocmd VimEnter * if argc() == 0 && !exists("s:std_in") | NERDTree | endif
autocmd BufWinEnter * NERDTreeMirror
autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif



" Coc.nvim config 

"if hidden is not set, TextEdit might fail.
set hidden

" 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>"
" Or use `complete_info` if your vim support it, like:
" inoremap <expr> <cr> complete_info()["selected"] != "-1" ? "\<C-y>" : "\<C-g>u\<CR>"

" Use `[g` and `]g` to navigate diagnostics
nmap <silent> [g <Plug>(coc-diagnostic-prev)
nmap <silent> ]g <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)

" Create mappings for function text object, requires document symbols feature of languageserver.
xmap if <Plug>(coc-funcobj-i)
xmap af <Plug>(coc-funcobj-a)
omap if <Plug>(coc-funcobj-i)
omap af <Plug>(coc-funcobj-a)

" Use <C-d> for select selections ranges, needs server support, like: coc-tsserver, coc-python
nmap <silent> <C-d> <Plug>(coc-range-select)
xmap <silent> <C-d> <Plug>(coc-range-select)

" 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>

""" End coc.nvim config """