Vim configuration with Scala Metals

.vimrc

" Personal settings
syntax on
set number
set relativenumber
set ruler
set cursorline
set modeline
set vb
set incsearch
set hlsearch
set sw=2 
set expandtab 
set smarttab
set encoding=utf-8
set termencoding=utf-8
set textwidth=0 
set wrapmargin=0
set nowrap
set nolist " Unset by default
set listchars=tab:→\ ,space:·,nbsp:␣,trail:•,eol:¶,precedes:«,extends:»

" Plugins...
" -----------------------------------------------------------------------------
if empty(glob('~/.vim/autoload/plug.vim'))
  silent !curl -fLo ~/.vim/autoload/plug.vim --create-dirs https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
  autocmd VimEnter * PlugInstall | source $MYVIMRC
endif

call plug#begin('~/.vim/plugged')

" Common
Plug 'tpope/vim-sensible'

" Scala 
Plug 'neoclide/coc.nvim', {'tag': '*', 'do': './install.sh'}
Plug 'derekwyatt/vim-scala'
Plug 'derekwyatt/vim-sbt'
Plug 'ktvoelker/sbt-vim'

" Haskell                                                                                                                                                                                                    
Plug 'neoclide/coc.nvim', {'do': { -> coc#util#install()}}                                                                                                                                                   
Plug 'neovimhaskell/haskell-vim'                                                                                                                                                                             
Plug 'alx741/vim-hindent' 
   
" Git
Plug 'tpope/vim-fugitive'

" Status line
let g:airline_powerline_fonts = 1
let g:airline_theme='tomorrow'
let g:airline#extensions#wordcount#enabled = 0 " Fix for column selection
let g:airline#extensions#tabline#enabled = 1
let g:airline_left_sep=''                                                                                                                                                                                  
let g:airline_right_sep=''   
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'

" Tree 
Plug 'scrooloose/nerdtree'
Plug 'xuyuanp/nerdtree-git-plugin'

" Theme 
Plug 'flazz/vim-colorschemes'

" Snippets
Plug 'MarcWeber/vim-addon-mw-utils'
Plug 'tomtom/tlib_vim'
Plug 'garbas/vim-snipmate'

" Tools
Plug 'vim-scripts/AnsiEsc.vim'
Plug 'ctrlpvim/ctrlp.vim'
Plug 'jremmen/vim-ripgrep'

call plug#end()
" -----------------------------------------------------------------------------

" Color settings
set term=xterm-256color
set t_Co=256
set t_ut= 
let g:solarized_termcolors = 256
colorscheme xoria256

" Shortcuts
nnoremap <F1>   <C-W>w
nmap <F2> :NERDTreeToggle<CR>
nmap <F3> :NERDTreeFocus<CR>
map <F12> :bn<CR>
map <F11> :bp<CR>

function ToggleWhitespace()
  if &list == '0'
    echom "Showing invisible characters" 
    execute 'set list'
  else
    echom "Hiding invisible characters"
    execute 'set nolist'
  endif
endfunction
nmap <F6> :call ToggleWhitespace()<CR>


" ctrlp Settings
let g:ctrlp_working_path_mode='ra'
let g:ctrlp_use_caching=0
let g:ctrlp_user_command = ['.git', 'cd %s && git ls-files']
let g:ctrlp_custom_ignore = {
  \ 'dir':  '\v[\/]\.(git)$',
  \ 'file': '\v\.(class)$'
  \ }
set wildignore+=*/tmp/*,*.so,*.swp,*.zip

" Markdown Setup
autocmd BufRead,BufNewFile *.md setlocal tw=78

" Scala Setup
let g:scala_sort_across_groups=1
autocmd BufRead,BufNewFile *.sbt set filetype=scala
autocmd FileType json syntax match Comment +\/\/.\+$+

" CoC Setup
set updatetime=300
set shortmess+=c
set signcolumn=yes
set nobackup
set nowritebackup
set cmdheight=2

inoremap <silent><expr> <c-space> coc#refresh()
inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"

nmap <silent> [c <Plug>(coc-diagnostic-prev)
nmap <silent> ]c <Plug>(coc-diagnostic-next)

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)

nmap <leader>ac <Plug>(coc-codeaction)

nnoremap <silent> F :call CocAction('format')<CR>
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

autocmd CursorHold * silent call CocActionAsync('highlight')

nmap <leader>rn <Plug>(coc-rename)

nnoremap <silent> <space>a  :<C-u>CocList diagnostics<cr>
nnoremap <silent> <space>o  :<C-u>CocList outline<cr>
nnoremap <silent> <space>s  :<C-u>CocList -I symbols<cr>
nnoremap <silent> <space>g  :<C-u>CocList -I grep<cr>
nnoremap <silent> <space>j  :<C-u>CocNext<CR>
nnoremap <silent> <space>k  :<C-u>CocPrev<CR>
nnoremap <silent> <space>p  :<C-u>CocListResume<CR>

Vim version 8.1
More info about Scala Metals setup: https://scalameta.org/metals/docs/editors/vim.html