Neovim setup for Scala

.ctags

--langdef=scala
--langmap=scala:.scala
--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy)[ \t]*)*(private[^ ]*|protected)?[ \t]*class[ \t]+([a-zA-Z0-9_]+)/\4/c,classes/
--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy)[ \t]*)*(private[^ ]*|protected)?[ \t]*object[ \t]+([a-zA-Z0-9_]+)/\4/o,objects/
--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy)[ \t]*)*(private[^ ]*|protected)?[ \t]*((abstract|final|sealed|implicit|lazy)[ \t ]*)*case class[ \t ]+([a-zA-Z0-9_]+)/\6/C,case classes/
--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy)[ \t]*)*(private[^ ]*|protected)?[ \t]*case object[ \t]+([a-zA-Z0-9_]+)/\4/O,case objects/
--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy)[ \t]*)*(private[^ ]*|protected)?[ \t]*trait[ \t]+([a-zA-Z0-9_]+)/\4/t,traits/
--regex-scala=/^[ \t]*type[ \t]+([a-zA-Z0-9_]+)/\1/T,types/
--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy|override|private[^ ]*(\[[a-z]*\])*|protected)[ \t]*)*def[ \t]+([a-zA-Z0-9_]+)/\4/m,methods/
--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy|override|private[^ ]*|protected)[ \t]*)*val[ \t]+([a-zA-Z0-9_]+)/\3/V,values/
--regex-scala=/^[ \t]*((abstract|final|sealed|implicit|lazy|override|private[^ ]*|protected)[ \t]*)*var[ \t]+([a-zA-Z0-9_]+)/\3/v,variables/
--regex-scala=/^[ \t]*package[ \t]+([a-zA-Z0-9_.]+)/\1/p,packages/
--exclude=target
--exclude=.git
--exclude=.svn
--exclude=.hg
--exclude=node_modules
--exclude=bundle.js
--exclude=*.js.map
--exclude=*.min.*
--exclude=*.swp
--exclude=*.bak
--exclude=*.tar.*

config.vim

" deoplete plugin for autocomplete
Plug 'Shougo/deoplete.nvim', { 'do': ':UpdateRemotePlugins' }

" autotag plugin to automatically generate ctags file
Plug 'craigemery/vim-autotag'

" ctags stuff

set tags=.tags
let g:autotagTagsFile=".tags"

map <C-o> :CtrlPTag<CR>
map <C-i> :TagbarToggle<CR>

" Regenerate tags file
map <C-u> :!ctags -R -f ./.tags .<CR>

let g:tagbar_type_scala = {
    \ 'ctagstype' : 'scala',
    \ 'sro'        : '.',
    \ 'kinds'     : [
      \ 'p:packages',
      \ 'T:types:1',
      \ 't:traits',
      \ 'o:objects',
      \ 'O:case objects',
      \ 'c:classes',
      \ 'C:case classes',
      \ 'm:methods',
      \ 'V:values:1',
      \ 'v:variables:1'
    \ ]
\ }

" deoplete stuff

let g:deoplete#enable_at_startup = 1

" Remap <tab> to allow cycling through the deoplete list, but only when the
" deoplete list window is open. Leave <tab> alone the rest of the time.
inoremap <expr><tab> pumvisible() ? "\<c-n>" : "\<tab>"



" Here's the complete list of my neovim plugins, in case you're interested
" General
Plug 'scrooloose/nerdcommenter'
Plug 'bronson/vim-trailing-whitespace'
Plug 'tpope/vim-unimpaired'
Plug 'godlygeek/tabular'
Plug 'sbdchd/neoformat'
Plug 'neomake/neomake'
Plug 'luochen1990/rainbow'
Plug 'Shougo/deoplete.nvim', { 'do': ':UpdateRemotePlugins' }
Plug 'mattn/emmet-vim'
Plug 'justinmk/vim-sneak'
Plug 'embear/vim-localvimrc'

" Filesystem/search
Plug 'scrooloose/nerdtree'
Plug 'ctrlpvim/ctrlp.vim'

" Tags
Plug 'majutsushi/tagbar'
Plug 'craigemery/vim-autotag'

" Git
Plug 'airblade/vim-gitgutter'
Plug 'tpope/vim-fugitive'

" Haskell
Plug 'parsonsmatt/intero-neovim'
Plug 'neovimhaskell/haskell-vim', { 'for': 'haskell' }
Plug 'Twinside/vim-hoogle', { 'for': 'haskell' }