Beamerのテーマを取得する自作ソース(パスベタ書き)

.vimrc

" my unite source: beamer theme  {{{
let s:beamer_themes_path="/usr/local/texlive/2016/texmf-dist/tex/latex/beamer/themes/theme"
let s:unite_source = {
      \ 'name': 'beamer_theme',
      \ 'description': 'built-in LaTeX beamer themes',
      \}
function! s:unite_source.gather_candidates(args, context)
  let s:files = filter(split(system('ls '.s:beamer_themes_path)),'v:val =~# "^beamertheme\.\*\\.sty$"')
  return map(s:files,'{
        \ "word": substitute(v:val[11:],"\.sty$","",""),
        \ "source": "beamer_theme",
        \ "kind": "word",
        \}')
endfunction
call unite#define_source(s:unite_source)
unlet s:unite_source
"}}}