vimrc

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" .vimrc
" Author: Kyle Ames
" Date: March 11, 2015
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set nocompatible
set t_Co=256
set background=light

let mapleader=","
filetype plugin indent on

"*******************************************************************
" Vim-Plug Plugin Manager - github.com/junegunn/vim-plug
"*******************************************************************
call plug#begin('~/.vim/bundle')

" IDE Plugins
Plug 'majutsushi/tagbar'
Plug 'christoomey/vim-tmux-navigator'
Plug 'bling/vim-airline'
Plug 'scrooloose/syntastic'
Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
Plug 'chazy/cscope_maps'
Plug 'kien/rainbow_parentheses.vim'
Plug 'tpope/vim-commentary'
Plug 'ryanoasis/vim-devicons'

" Git
Plug 'tpope/vim-fugitive'
Plug 'gregsexton/gitv'
Plug 'airblade/vim-gitgutter'

" Extended Shortcuts
Plug 'jeetsukumaran/vim-buffergator'
Plug 'junegunn/vim-peekaboo'

" Syntax/Languge Plugins
Plug 'fatih/vim-go'
Plug 'rust-lang/rust.vim'

call plug#end()

"*******************************************************************
" General Vim Settings
"*******************************************************************

" Highlight extra whitespace in red
highlight ExtraWhitespace ctermbg=red guibg=red
match ExtraWhitespace /\s\+$/
autocmd BufWinEnter * match ExtraWhitespace /\s\+$/
autocmd InsertEnter * match ExtraWhitespace /\s\+\%#\@<!$/
autocmd InsertLeave * match ExtraWhitespace /\s\+$/
autocmd BufWinLeave * call clearmatches()

" Use Sauce Code Pro 12 in the GUI as well
if has('gui_running')
  set guifont=Sauce\ Code\ Powerline:h12
endif

" Enable fzf as our fuzzy finder - HIGHLY RECOMMEND THIS, IT IS LIFE CHANGING
set rtp+=~/.fzf

" Clear any existing autocommands
autocmd!

" Don't have files trying to override this .vimrc:
set nomodeline

" Keep the cursor on the same column
set nostartofline

" Show line numbers
set number

" Turn off spellcheck by default
if has ('spell')
  set nospell
endif

" Make global substitutions default
set gdefault

" WTF happened to backspace with vim 7.4. on RHEL?
set backspace=indent,eol,start

" Don't beep at me
set visualbell

" Save 50 lines of history
set history=50

" Smarter, better searches
set ignorecase
set smartcase
set incsearch

" Matching braces and visual line-wrapping
set showmatch
set nowrap

" Tab and Space stuff
set shiftwidth=4
set softtabstop=4
set shiftround
set expandtab
set autoindent

"Show the terminal title if possible"
set title

"Save the buffer when performing commands
set autowrite

"Save 5 lines above and below the cursor
set scrolloff=5

" Command line info
if has('cmdline_info')
  set showmode
  set showcmd
  set ruler
endif

" Split below and to the right when creating new splits
set splitbelow
set splitright

"*******************************************************************
" Programming Specific Settings - (Syntax, Plugins, Features, etc.)
"*******************************************************************

" ctags
set tags=./tags;/

" Git-Gutter
let g:gitgutter_enabled = 1
highlight clear SignColumn

" Folding - Enable folding if your snytax supports it. This does not start enabled by default when a file is opened.
if has('folding')
  set foldmethod=syntax
  set foldnestmax=10
  set foldenable
  set foldcolumn=0
  set foldlevel=255
endif

" Python - Show whitespace so that we don't get burned
au filetype Python set listchars=tab:>.,trail:.,extends:#,nbsp:.
au FileType python set shiftwidth=4
au FileType python set softtabstop=4

" Vim-Airline
set laststatus=2
let g:airline#extensions#tabline#enabled = 1
let g:airline_powerline_fonts = 1

" Syntax and search highlighting support
if has('syntax')
  syntax on
  if has('extra_search')
    set hlsearch
  endif
endif

" vim-go - Golang plugins for vim
let g:go_bin_path = $HOME."/.gobin/"
au FileType go nmap <Leader>gd <Plug>(go-doc)
au FileType go nmap <Leader>gv <Plug>(go-doc-vertical)
au FileType go nmap <Leader>gb <Plug>(go-doc-browser)
au FileType go nmap gd <Plug>(go-def)
au FileType go nmap <Leader>ds <Plug>(go-def-split)
au FileType go nmap <Leader>dv <Plug>(go-def-vertical)
au FileType go nmap <Leader>gdt <Plug>(go-def-tab)
au FileType go nmap <Leader>r <Plug>(go-run)
au FileType go nmap <Leader>b <Plug>(go-build)
au FileType go nmap <Leader>t <Plug>(go-test)
au FileType go nmap <Leader>s <Plug>(go-implements)
let g:go_highlight_functions = 1
let g:go_highlight_methods = 1
let g:go_highlight_structs = 1
let g:go_highlight_operators = 1
let g:go_highlight_interfaces = 1
let g:go_highlight_build_constraints = 1
let g:go_fmt_command = "goimports"
let g:go_version_warning = 0

" rust - use cargo check
let g:syntastic_rust_rustc_exe = 'cargo check'
let g:syntastic_rust_rustc_fname = ''
let g:syntastic_rust_rustc_args = '--'
let g:syntastic_rust_checkers = ['rustc']
let g:rustfmt_autosave = 1

" Rainbow Parentheses - turn them all on
au Syntax * RainbowParenthesesLoadRound
au Syntax * RainbowParenthesesLoadSquare
au Syntax * RainbowParenthesesLoadBraces

"*******************************************************************
" Function Key Shortcut Remappings
"       F1  - Help
"       F2  - Paste Mode
"       F3  - Highlight Search
"       F4  - Tagbar
"       F5  - Unmapped
"       F6  - FZF
"       F7  - FZF Grep
"       F8  - FZF Tag Search
"       F9  - GitGutter Toggle
"       F10 - Gitv
"       F11 - Fold/Unfold Block
"       F12 - Show/Hide Fold Column
"*******************************************************************
set pastetoggle=<F2>

nnoremap <silent> <F3> :set hlsearch!<CR>:set hlsearch?<CR>
inoremap <silent> <F3> <C-O>:set hlsearch!<CR><C-O>:set hlsearch?<CR>

nnoremap <F4> :TagbarToggle<CR>
inoremap <F5> <esc>:TagbarToggle<CR>

nnoremap <F5> :Gitv<CR>
inoremap <F5> <esc>:Gitv<CR>

nnoremap <F6> :FZF ~<CR>
inoremap <F6> <esc>:FZF ~<CR>

nnoremap <F7> :FZFLines<CR>
inoremap <F7> <esc>:FZFLines<CR>

nnoremap <silent> <F8> :FZFTags<CR>
inoremap <silent> <F8> <esc>:FZFTags<CR>

nnoremap <F9> :GitGutterToggle<CR>
inoremap <F9> <esc>:GitGutterToggle<CR>

nnoremap <F10> :RainbowParenthesesToggle<CR>
inoremap <F10> <esc>:RainbowParenthesesToggle<CR>

nnoremap <F11> :TaskList<CR>
inoremap <F11> <esc>:TaskList<CR>

"*******************************************************************
" Functions/Commands
"*******************************************************************

" Toggle the Snytastic error window with Ctrl+E
function! ToggleErrors()
    let old_last_winnr = winnr('$')
    lclose
    if old_last_winnr == winnr('$')
        " Nothing was closed, open syntastic error location panel
        Errors
    endif
endfunction

" FZF Buffer Search
function! s:line_handler(l)
  let keys = split(a:l, ':\t')
  exec 'buf ' . keys[0]
  exec keys[1]
  normal! ^zz
endfunction

" FZF Buffer Search
function! s:buffer_lines()
  let res = []
  for b in filter(range(1, bufnr('$')), 'buflisted(v:val)')
    call extend(res, map(getbufline(b,0,"$"), 'b . ":\t" . (v:key + 1) . ":\t" . v:val '))
  endfor
  return res
endfunction

command! FZFLines call fzf#run({
\   'source':  <sid>buffer_lines(),
\   'sink':    function('<sid>line_handler'),
\   'options': '--extended --nth=3..',
\   'down':    '60%'
\})


"*******************************************************************
" FZFTags
"
" Performs an fzf search of a project's tags file
"*******************************************************************
command! -bar FZFTags if !empty(tagfiles()) | call fzf#run({
\   'source': "sed '/^\\!/d;s/\t.*//' " . join(tagfiles()) . ' | uniq',
\   'sink':   'tag',
\ }) | else | echo 'Preparing tags' | call system('ctags -R') | FZFTag | endif


"*******************************************************************
" FZFTags
"
" Performs an fzf search of a project's tags file
"*******************************************************************
command! FZFTagFile if !empty(tagfiles()) | call fzf#run({
\   'source': "cat " . tagfiles()[0] . ' | grep "' . expand('%:@') . '"' . " | sed -e '/^\\!/d;s/\t.*//' ". ' |  uniq',
\   'sink':   'tag',
\   'options':  '+m',
\   'left':     60,
\ }) | else | echo 'No tags' | endif


"*******************************************************************
" Custom Mappings
"*******************************************************************

" The arrow keys are evil, don't let them be used
nnoremap <up> <nop>
nnoremap <down> <nop>
nnoremap <left> <nop>
nnoremap <right> <nop>
inoremap <up> <nop>
inoremap <down> <nop>
inoremap <left> <nop>
inoremap <right> <nop>

" Buffer Management
nnoremap gn :bn<CR>
nnoremap gN :bp<CR>

" Tab Management
nnoremap gnt :tabnext<CR>
nnoremap gNt :tabprev<CR>

" Breaking lines with ,[enter] to save the awkward into insert and out
noremap <leader><cr> i<cr><Esc>

" For when I'm dumb and open a RO file without sudo
cnoremap sudow w !sudo tee % >/dev/null

" Toggle syntax errors with Ctrl+E
nnoremap <silent> <C-e> :<C-u>call ToggleErrors()<CR>

" Search the file using the fuzzy finder
nnoremap <leader><Space> :FZFLines<CR>

" Avoid some security problems with directory-specific vimrc files
" This should be the last line of the file
set secure