.vimrc

let mapleader=","                   " remap leader from \ to ,
let maplocalleader=","

"" Vundle and bundles configuration
source ~/.vim/bundles.vim

syntax enable
set encoding=utf-8
set showcmd                         " display incomplete commands
set noshowmode                      " never display the current mode; powerline does this
filetype plugin indent on           " load file type plugins + indentations
set modelines=0                     " don't read modelines
set nomodeline                      " disable modelines for security
set mouse=a                         " enable the mouse
set autoread                        " auto reload file if changed outside vim but not inside vim
set noerrorbells                    " disable error bells
set novisualbell                    " disable visual bells
set visualbell t_vb=                " don't beep or flash at all
set lazyredraw                      " don't redraw screen during macro playback
"set t_Co=256                        " use 256 colors in terminal
set background=dark
colorscheme base16-default
set guifont=Inconsolata\ for\ Powerline:h13

" Persistent undo
set undofile
set undolevels=1000
set undoreload=1000

" Centralize backups, swapfiles and undo history
set backupdir=~/.vim/backups
set directory=~/.vim/swaps
if exists("&undodir")
    set undodir=~/.vim/undo
endif

"" Whitespace
set nowrap                          " don't wrap lines
set showbreak=↪                     " if breaking lines, show this char at beginning of line
set tabstop=4 shiftwidth=4          " use four space tabs
set softtabstop=4                   " backspace by four spaces
set shiftround                      " force indents to multiples of shiftwidth
set expandtab                       " use spaces not tabs
set backspace=indent,eol,start      " backspace works on everything
set autoindent
set copyindent                      " copy the previous indentation when autoindenting
set list                            " show invisible chars
set listchars=tab:▸\ ,extends:❯,precedes:❮,trail:·

"" Searching
set path+=**                        " when using :find, search in subdirs too
set hlsearch                        " highlight matches
set incsearch                       " incremental searching
set ignorecase                      " case insensitive searching
set smartcase                       " case sensitive if search contains capitals
set gdefault                        " by default, apply substitutions globally

" Use normal regexes when searching
nnoremap / /\v
vnoremap / /\v

"" Editor interface
set textwidth=0
set number                          " show line numbers
set ruler                           " show line and column number of cursor
set cursorline                      " highlight the current line
set laststatus=2                    " always show status line
set nrformats=hex                   " make <C-x> and <C-a> handle numbers with leadings 0s
set colorcolumn=81                  " draw a line at 81 columns

set scrolloff=3                     " cursor is always three lines from top/bottom edge of screen
set sidescroll=4                    " scroll horizontally by four chars, at minimum
set sidescrolloff=8                 " cursor is always eight lines from left/right edge of screen

set splitright                      " open vertical splits on the right
set splitbelow                      " open horizontal splits below

set wildmenu                        " show completions above command line
set wildmode=full                   " complete next full match

set wildignore+=*.o,*.d,*.class

set ttyfast                         " fast terminal connection

set pastetoggle=<F2>                " <F2> enables paste mode, which disables autoindent

set nojoinspaces                    " when joining line, use one space after '.'

"" Key remappings
nnoremap ; :
"nnoremap : ;

" up/down works on logical lines, not real file lines
nnoremap j gj
nnoremap k gk
nnoremap <Down> gj
nnoremap <Up> gk
nnoremap gj j
nnoremap gk k

vnoremap j gj
vnoremap k gk
vnoremap <Down> gj
vnoremap <Up> gk
vnoremap gj j
vnoremap gk k

inoremap <Down> <C-o>gj
inoremap <Up> <C-o>gk

" Yank to end of line; parallels C and D
nnoremap Y y$

" Make 'a jump to line and col and `a jump to col
" This reverses the default behaviour
nnoremap ' `
nnoremap ` '

" Use Q for formatting current paragraph or selection
vnoremap Q gq
nnoremap Q gqap

" Easier window navigation
map <C-h> <C-w>h
map <C-j> <C-w>j
map <C-k> <C-w>k
map <C-l> <C-w>l

" Shortcuts for saving
nnoremap ;; :w<CR>
nnoremap <C-s> :w<CR>
inoremap <C-s> <ESC>:w<CR>a

" Keep visual block selected when changing indent
vmap > >gv
vmap < <gv

" Emacs-like beginning and end of line
imap <C-e> <C-o>$
imap <C-a> <C-o>^
nmap L $
nmap H ^

"" Mapleader - custom mappings
nnoremap <leader>t :tabnew<CR>
nnoremap <leader>q :q<CR>

"" Quickly edit/reload vimrc
nnoremap <silent> <leader>ev :e $MYVIMRC<CR>
nnoremap <silent> <leader>sv :so $MYVIMRC<CR>

" Strip all trailing whitespace
nnoremap <leader>W :%s/\s\+$//<cr>:let @/=''<CR>

" Yank/paste to OS clipboard
nnoremap <leader>y "*y
nnoremap <leader>Y "*yy
nnoremap <leader>p "*p
nnoremap <leader>P "*P

" Clear highlighted searches
nnoremap <silent> <leader>/ :nohlsearch<CR>

nnoremap <leader>n :call NumberToggle()<CR>

nnoremap <leader>u :GundoToggle<CR>

" CtrlP mappings
let g:ctrlp_map='<leader>f'
nnoremap <leader>b :CtrlPBuffer<CR>
nnoremap <leader>m :CtrlPMRU<CR>
nnoremap <leader>x :CtrlPMixed<CR>

" Syntastic mappings
nnoremap <leader>e :Errors<CR>
nnoremap <leader>s :SyntasticCheck<CR>

" Custom functions

" Toggle relative/absolute numbers
" http://jeffkreeftmeijer.com/2012/relative-line-numbers-in-vim-for-super-fast-movement/
function! NumberToggle()
  if(&relativenumber == 1)
    set number
  else
    set relativenumber
  endif
endfunc

" In terminal vim, let ESC leave insert mode faster
" Side-effect of using Powerline
if ! has('gui_running')
    set ttimeoutlen=10
    augroup FastEscape
        autocmd!
        au InsertEnter * set timeoutlen=0
        au InsertLeave * set timeoutlen=1000
    augroup END
endif

"" Configure plugins

" vim-ruby
" Highlight Ruby operators
let ruby_operators=1

" Powerline
set runtimepath+=~/.vim/bundle/powerline/powerline/bindings/vim

" Fugitive
" Delete hidden Fugitive buffers
autocmd BufReadPost fugitive://* set bufhidden=delete
" Mapping for .. when browsing git objects
autocmd User fugitive
  \ if fugitive#buffer().type() =~# '^\%(tree\|blob\)$' |
  \   nnoremap <buffer> .. :edit %:h<CR> |
  \ endif

" Syntastic
" Run a syntax check when loading a file
let g:syntastic_check_on_open=1

" Adjust the colours for errors and warnings
highlight SyntasticErrorSign guifg=white guibg=red
highlight SyntasticWarningSign guifg=white guibg=blue

" Change the Syntastic error/warning symbols
let g:syntastic_error_symbol='✘'
let g:syntastic_style_error_symbol='●'
let g:syntastic_warning_symbol='✘'
let g:syntastic_style_warning_symbol='●'

" Don't show tooltip errors
let g:syntastic_enable_ballons=0

" CtrlP
" Ignore files
let g:ctrlp_custom_ignore='\v\.(o|d|class)$'

" ## added by OPAM user-setup for vim / base ## 93ee63e278bdfc07d1139a748ed3fff2 ## you can edit, but keep this line
let s:opam_share_dir = system("opam config var share")
let s:opam_share_dir = substitute(s:opam_share_dir, '[\r\n]*$', '', '')

let s:opam_configuration = {}

function! OpamConfOcpIndent()
  execute "set rtp^=" . s:opam_share_dir . "/ocp-indent/vim"
endfunction
let s:opam_configuration['ocp-indent'] = function('OpamConfOcpIndent')

function! OpamConfOcpIndex()
  execute "set rtp+=" . s:opam_share_dir . "/ocp-index/vim"
endfunction
let s:opam_configuration['ocp-index'] = function('OpamConfOcpIndex')

function! OpamConfMerlin()
  let l:dir = s:opam_share_dir . "/merlin/vim"
  execute "set rtp+=" . l:dir
endfunction
let s:opam_configuration['merlin'] = function('OpamConfMerlin')

let s:opam_packages = ["ocp-indent", "ocp-index", "merlin"]
let s:opam_check_cmdline = ["opam list --installed --short --safe --color=never"] + s:opam_packages
let s:opam_available_tools = split(system(join(s:opam_check_cmdline)))
for tool in s:opam_packages
  " Respect package order (merlin should be after ocp-index)
  if count(s:opam_available_tools, tool) > 0
    call s:opam_configuration[tool]()
  endif
endfor
" ## end of OPAM user-setup addition for vim / base ## keep this line