.vimrc

set nocompatible
set nobackup
set nowritebackup
set noswapfile

call plug#begin()
Plug 'morhetz/gruvbox'
Plug 'jlanzarotta/bufexplorer'
Plug 'tpope/vim-fugitive'
Plug 'tpope/vim-sensible'
Plug 'tpope/vim-commentary'
Plug 'mattn/vim-gist'
Plug 'mattn/webapi-vim'
Plug 'kien/ctrlp.vim'
Plug 'mileszs/ack.vim'
Plug 'junegunn/fzf', { 'dir': '~/.config/fzf', 'do': './install --all' }
Plug 'scrooloose/nerdtree', { 'on':  'NERDTreeToggle' }
Plug 'govim/govim'
Plug 'PotatoesMaster/i3-vim-syntax'
Plug 'majutsushi/tagbar'
call plug#end()

syntax on
filetype on
filetype plugin on

let mapleader=','

set nu
set relativenumber
set numberwidth=1
set title
set confirm

set encoding=utf-8
set t_Co=256

set background=dark
colorscheme gruvbox
let g:gruvbox_italic=1

set matchpairs+=<:>
set scrolloff=3 " Keep 3 context lines above and below the cursor
set backspace=2 " Allow backspacing over autoindent, EOL, and BOL
set showmatch " Briefly jump to a paren once it's balanced
set nowrap " don't wrap text
set linebreak " don't wrap textin the middle of a word
set autoindent " always set autoindenting on
set tabstop=4 " <tab> inserts 4 spaces
set shiftwidth=4 " but an indent level is 2 spaces wide.
set softtabstop=4 " <BS> over an autoindent deletes both spaces.
set expandtab " Use spaces, not tabs, for autoindent/tab key.
set shiftround " rounds indent to a multiple of shiftwidth
set laststatus=2

" searching
set ignorecase
set smartcase
set smarttab
set hlsearch
set incsearch
nnoremap <silent> <leader><space> :nohlsearch<cr>

" diff
set diffopt+=vertical

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

" show background lines for row/col
set cursorcolumn
set cursorline
nnoremap <silent> <Leader>c :set cursorline! cursorcolumn!<CR>

" ctrl-jklm navigates around split windows
map <c-j> <c-w>j
map <c-k> <c-w>k
map <c-l> <c-w>l
map <c-h> <c-w>h

" better selection movement.
" after using > to indent or deindent, we use gv to reselect
" the last selection allowing us to indent selected text more
" than once.
vnoremap > ><CR>gv
vnoremap < <<CR>gv

" NERDTree
let g:NERDTreeDirArrows=1
map <leader>nt :NERDTreeToggle<CR>

" ctrlp
let g:ctrlp_map = '<leader>f'
map <leader>b :CtrlPBuffer<CR>
let g:ctrlp_custom_ignore = {
	\ 'dir':  '\v[\/]\.(git|hg|svn|collected_static)$',
	\ 'file': '\v\.(exe|so|dll|pyc|swp|swo)$',
	\}

" tagbar
nmap <leader>tb :TagbarToggle<CR>
nmap <leader>tf :TagbarOpen j<CR>
let g:tagbar_type_go = {
        \ 'ctagstype' : 'go',
        \ 'kinds'     : [
            \ 'p:package',
            \ 'i:imports:1',
            \ 'c:constants',
            \ 'v:variables',
            \ 't:types',
            \ 'n:interfaces',
            \ 'w:fields',
            \ 'e:embedded',
            \ 'm:methods',
            \ 'r:constructor',
            \ 'f:functions'
    \ ],
    \ 'sro' : '.',
    \ 'kind2scope' : {'t' : 'ctype', 'n' : 'ntype'},
    \ 'scope2kind' : {'ctype' : 't','ntype' : 'n'},
    \ 'ctagsbin'  : 'gotags',
    \ 'ctagsargs' : '-sort -silent'
\ }

" completion
set completeopt=popup
set completepopup=align:menu,border:off,highlight:Pmenu

" grep
nnoremap <Leader>a :Ack!<Space>
if executable('rg')
    let g:ackprg = 'rg --vimgrep'
endif
autocmd FileType go nmap <buffer> <leader>a :Ack! -g '!vendor'<Space>

" language: go
call govim#config#Set("QuickfixAutoDiagnostics", 1)
augroup go
    autocmd!
    autocmd FileType go nmap <silent> <buffer> <leader>h :call GOVIMHover()<CR>
    autocmd FileType go nmap <silent> <buffer> gh :call GOVIMHover()<CR>
    autocmd FileType go nmap <silent> <buffer> gr :call GOVIMReferences()<CR>
    autocmd FileType go nmap <silent> <buffer> gs :call GOVIMStringFn()<CR>
augroup END

" markdown
au BufRead,BufNewFile *.md setlocal textwidth=80

" set most files to a common space-based indent of 2
autocmd FileType
            \ c,json,ruby,eruby,haml,yaml,coffee,js,javascript,html,css,sass,gitconfig
            \ setlocal expandtab shiftwidth=2 softtabstop=2 tabstop=2