if executable('rg')
  set grepprg=rg\ --vimgrep\ --no-heading\ --smart-case
  set grepformat=%f:%l:%c:%m,%f:%l%m,%f\ \ %l%m
elseif executable('ag')
  set grepprg=ag\ --nogroup\ --nocolor\ --vimgrep
  set grepformat^=%f:%l:%c:%m
endif

" Taken from https://github.com/hauleth/dotfiles/blob/master/vim/.config/nvim/init.vim
command! -bang -nargs=* -complete=dir Grep call asyncdo#run(<bang>0,
      \ { 'job': &grepprg, 'errorformat': &grepformat }, <f-args>)
command! -bang -nargs=* -complete=dir LGrep call asyncdo#lrun(<bang>0,
      \ { 'job': &grepprg, 'errorformat': &grepformat }, <f-args>)

augroup GrepperQFOpen
  autocmd!
  autocmd QuickFixCmdPost [^l]* nested cwindow
  autocmd QuickFixCmdPost    l* nested lwindow
augroup END