My VIM setup

.vimrc

syntax on
" Add jbuilder syntax highlighting
au BufNewFile,BufRead *.json.jbuilder set ft=ruby

" Add spell check to md files
autocmd BufRead,BufNewFile *.md setlocal spell

" Set 'Ctrl+n' to NERDTree toggle
map <C-n> :NERDTreeToggle<CR>

" Toggle indent lines
map <Leader>ig :IndentLinesToggle<CR>

" test.vim shortcuts
nmap <silent> t<C-n> :TestNearest<CR>
nmap <silent> t<C-f> :TestFile<CR>
nmap <silent> t<C-s> :TestSuite<CR>
nmap <silent> t<C-l> :TestLast<CR>
nmap <silent> t<C-g> :TestVisit<CR>

" Add empty line below
nmap oo o<Esc>k

set cc=80
set tabstop=2
set shiftwidth=2
set softtabstop=2
set expandtab
set number
set statusline+=%F
set backspace=indent,eol,start

" Download vim-plug if not found.
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 --sync | source $MYVIMRC
endif

" Plugins will be downloaded under the specified directory.
call plug#begin('~/.vim/plugged')

" Declare the list of plugins.
Plug 'scrooloose/nerdtree'
Plug 'ctrlpvim/ctrlp.vim'
Plug 'vim-airline/vim-airline'
Plug 'jiangmiao/auto-pairs'
Plug 'scrooloose/nerdcommenter'
Plug 'airblade/vim-gitgutter'
Plug 'tpope/vim-fugitive'
Plug 'pangloss/vim-javascript'
Plug 'elzr/vim-json'
Plug 'mxw/vim-jsx'
Plug 'tpope/vim-rails'
Plug 'tpope/vim-endwise'
Plug 'scrooloose/syntastic'
Plug 'bronson/vim-trailing-whitespace'
Plug 'nathanaelkane/vim-indent-guides'
Plug 'rking/ag.vim'
Plug 'vim-syntastic/syntastic'
Plug 'yggdroot/indentline'
Plug 'kchmck/vim-coffee-script'
Plug 'elixir-lang/vim-elixir'
Plug 'godlygeek/tabular'
Plug 'valloric/youcompleteme'
Plug 'smerrill/vcl-vim-plugin'
Plug 'janko-m/vim-test'
Plug 'joker1007/vim-ruby-heredoc-syntax'

" List ends here. Plugins become visible to Vim after this call.
call plug#end()

filetype plugin on
let NERDTreeMinimalUI = 1
let NERDTreeDirArrows = 1
let g:ctrlp_max_files = 0
let g:ctrlp_max_depth = 40
let g:ctrlp_custom_ignore = 'node_modules\|DS_Store\|git'
let g:indentLine_enabled = 0
let g:indentLine_char = '│'
let g:indentLine_color_term = 103
set background=dark

" Add syntax rule
let g:ruby_heredoc_syntax_filetypes = {
        \ "javascript" : {
        \   "start" : "JAVASCRIPT",
        \},
        \ "html" : {
        \   "start" : "HTML",
        \},
  \}

" 'start' is heredoc start literal.

" Use Silver Searcher for CtrlP
if executable('ag')
  " Use ag over grep
  set grepprg=ag\ --nogroup\ --nocolor

  " Use ag in CtrlP for listing files. Lightning fast and respects .gitignore
  let g:ctrlp_user_command = 'ag %s -l --nocolor -g ""'

  " ag is fast enough that CtrlP doesn't need to cache
  let g:ctrlp_use_caching = 0
endif