.vimrc

" General settings
set autoindent                      " auto-indent new lines
set backspace=indent,eol,start      " backspace through everything in insert mode
set cursorline                      " highlight the current line
set expandtab                       " use spaces, not tabs
set list lcs=tab:▸\ ,trail:·,nbsp:_ " Show "invisible" characters
set nocompatible                    " choose no compatibility with legacy vi
set nowrap                          " don't wrap lines
set number                          " Line numbers - always on all the time
set tabstop=2 shiftwidth=2          " a tab is two spaces

" Vim plugins
" Brief help
" :PlugInstall    - installs plugins; append `!` to update or just :PlugUpdate
" :PlugUpdate     - update plugins
" :PlugClean      - confirms removal of unused plugins; append `!` to auto-approve removal
" :PlugUpgrade    - upgrade vim-plug itself
let data_dir = has('nvim') ? stdpath('data') . '/site' : '~/.vim'
if empty(glob(data_dir . '/autoload/plug.vim'))
  silent execute '!curl -fLo '.data_dir.'/autoload/plug.vim --create-dirs  https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim'
  autocmd VimEnter * PlugInstall --sync | source $MYVIMRC
endif

call plug#begin('~/.vim/plugged')
" Utilities
Plug 'jiangmiao/auto-pairs'     " Insert or delete brackets, parens, quotes in pair
Plug 'mileszs/ack.vim'          " :Ack in vim
Plug 'tomtom/tcomment_vim'      " comment lines with <Leader>__ (and other cool tricks)
Plug 'tpope/vim-endwise'        " end structures automatically
Plug 'https://github.com/tpope/vim-dispatch.git'  " run commands in vim asynch

" Color scheme for vim
Plug 'junegunn/seoul256.vim'

" Powerline, but it's Airline
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'

" Git utilities
Plug 'airblade/vim-gitgutter'   " show git status in the gutter
Plug 'tpope/vim-fugitive'       " vim Git wrapper

" Ruby
Plug 'tpope/vim-bundler'
Plug 'tpope/vim-rails'
Plug 'vim-ruby/vim-ruby'

Plug 'preservim/nerdtree' |
      \ Plug 'Xuyuanp/nerdtree-git-plugin' |
      \ Plug 'ryanoasis/vim-devicons' |
      \ Plug 'tiagofumo/vim-nerdtree-syntax-highlight' |
      \ Plug 'unkiwii/vim-nerdtree-sync' |
      \ Plug 'tyok/nerdtree-ack'
call plug#end()

" Show commits for every source line
nnoremap <Leader>gb :Git blame<CR>

" Color scheme settings
let g:seoul256_background = 234
colorscheme seoul256

" Vim Airline
set laststatus=2
let g:airline#extensions#tabline#enabled = 1
let g:airline_powerline_fonts = 1
let g:airline_theme='simple'
let g:airline#extensions#bufferline#enabled = 0

" NERDTree config
nnoremap <C-n> :NERDTree<CR>
nmap <leader>d :NERDTreeToggle<CR>
nmap <leader>f :NERDTreeFind<CR>

" close the last buffer (file)
nnoremap <leader>c :bp\|bd #<CR>

" Start NERDTree and put the cursor back in the other window.
autocmd VimEnter * NERDTree | wincmd p

" Exit Vim if NERDTree is the only window remaining in the only tab.
autocmd BufEnter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif

let g:NERDSpaceDelims = 1
let g:NERDTreeGitStatusUseNerdFonts = 1
let g:NERDTreeHighlightCursorline = 1
let g:NERDTreeShowHidden = 1
let g:airline_powerline_fonts = 1
let g:nerdtree_sync_cursorline = 1