find & grep from Vim commandline

gistfile1.vim

command! -nargs=1 Grep call s:Grep(<f-args>)

function! s:Grep(command)
  let orig_grepprg = &l:grepprg
  let &l:grepprg = substitute(a:command, '|', '\\|', 'g')
  grep
  let &l:grepprg = orig_grepprg
endfunction

Settings

Copy & paste the code to your ~/.vimrc.

Usage

You can specify a chain of unix commands as an argument which results "grep -n" style output. You can then manipulate the result using QuickFix commands, such as ":cn" and ":cp", just like the regular ":grep" command.

:Grep find src -name '*.java' | xargs grep -n 'BigDecimal\|BigInteger'

or

:Grep find src -name '*.java' -exec grep -n 'BigDecimal\|BigInteger' {} +