Vim configuration file

.vimrc

" ---------------------
" General Configuration
" ---------------------
" Get arrow keys working
set nocompatible

" Enable 256 colors
set t_Co=256

" Turn syntax highlighting on
" http://vimdoc.sourceforge.net/htmldoc/syntax.html#syntax
" https://realpython.com/vim-and-python-a-match-made-in-heaven/#macos-os-x
let python_highlight_all=1
syntax on 

" Configure code folding
" http://vim.wikia.com/wiki/Folding
set foldmethod=indent " Form a code fold from groups of lines with the same indentation
set foldlevelstart=10 " TODO: Fold code blocks larger than this on opening a file

" Enable the mouse in all modes
" http://vimdoc.sourceforge.net/htmldoc/options.html#'mouse'
set mouse=r

" Use a comma as the leader key
" http://learnvimscriptthehardway.stevelosh.com/chapters/06.html
let mapleader=","

" Load the color scheme
colorscheme gruvbox " http://vimdoc.sourceforge.net/htmldoc/syntax.html#:colorscheme
set background=dark " http://vimdoc.sourceforge.net/htmldoc/options.html#'background'

" Enable auto-indentation
"set autoindent
set smartindent

" Enable line numbers
set number

" Highlight the current line
set cursorline

" Configure tabs as two spaces
set tabstop=2
set shiftwidth=2
set expandtab
set softtabstop=2

" Enable tab-completion for the command line
set wildmenu

" Do NOT update the display while executing macros
set lazyredraw

" Highlight matching [{()}]
set showmatch

" Search as characters are entered
set incsearch

" Highlight search matches
set hlsearch

" Hide buffers instead of closing them
set hidden

" Do NOT keep backup files and keep swap files out of the working directory
set nobackup
set nowritebackup
set directory=/tmp

" ------------
" Key Mappings
" ------------
" Map <F2> to enter/exit paste mode
set pastetoggle=<F2>

" Map <leader><space> to disable search highlighting
nnoremap <leader><space> :nohlsearch<CR>

" Map F5 to remove all trailing whitespace
nnoremap <F5> :let _s=@/<Bar>:%s/\s\+$//e<Bar>:let @/=_s<Bar><CR>

" Map <space> to open/close code folds
nnoremap <space> za

" Map ctrl+a to select-all
nnoremap <C-A> ggVG

" Map shift+K on a word to look up its man page
runtime! ftplugin/man.vim

" --------------------
" Plugin Configuration
" --------------------
" airline plugin options
let g:airline_theme='gruvbox'
let g:airline#extensions#tabline#enabled = 1

" NERDTree plugin options
" Close vim if the only window left open is NERDTree
autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif

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

" File explorer
Plug 'scrooloose/nerdtree'

" Fuzzy finder
Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }

" Fuzzy finder in vim
Plug 'junegunn/fzf.vim'

" Tab completion
Plug 'davidhalter/jedi-vim'

" Colorscheme (includes its own airline theme)
Plug 'morhetz/gruvbox'

" Syntax checking/highlighting
Plug 'scrooloose/syntastic'

" Status bar
Plug 'vim-airline/vim-airline'

" Initialize plugin system
call plug#end()