unite-grep: grep source for unite.vim

grep.vim

" grep source for unite.vim
" 
" setting example:
"
"   let g:unite_source_grep_default_dir = '~/.vim' 
"   let g:unite_source_grep_default_opts = '-iR' 
 
let s:grep_source = { 'name': 'grep', 'is_volatile': 1 } 
function! s:grep_source.gather_candidates(args, context) 
  let l:directory  = get(a:args, 0, g:unite_source_grep_default_dir) 
  let l:extra_opts = get(a:args, 1, g:unite_source_grep_default_opts) 
                                                                                                                                                                                                                                              
  if l:directory =~ '^-' 
    let l:extra_opts = l:directory 
    let l:directory  = g:unite_source_grep_default_dir 
  endif 
 
  let l:candidates = split( 
    \ unite#util#system(printf( 
    \   'grep %s %s %s', 
    \   a:context.input, 
    \   l:directory, 
    \   l:extra_opts)), 
    \  "\n") 
  return map(l:candidates, 
    \ '{  
    \   "word": v:val, 
    \   "source": "grep", 
    \   "kind": "file", 
    \   "action__path": substitute(v:val, "\:.*", "", ""), 
    \ }') 
endfunction 
call unite#define_source(s:grep_source)