AlterCommand nse NeoSnippetEdit -split -vertical

let s:source = unite#sources#neosnippet#define()

" Override gather_candidates in order to match by .snip as well as .word
function! s:source.gather_candidates(args, context) "{{{
  return map(copy(a:context.source__snippets), "{
        \   'word' : v:val.word . ' ' . v:val.snip,
        \   'abbr' : printf('%-50s %s', v:val.word, v:val.menu_abbr),
        \   'kind' : 'neosnippet',
        \   'action__complete_word' : v:val.word,
        \   'action__complete_pos' : a:context.source__cur_keyword_pos,
        \   'action__path' : v:val.action__path,
        \   'action__pattern' : v:val.action__pattern,
        \   'source__menu' : v:val.menu_abbr,
        \   'source__snip' : v:val.snip,
        \   'source__snip_ref' : v:val,
        \ }")
endfunction "}}}

" Onetime Snippet
function! Genki_add_onetime_snippet(key, ...)
  let snip = join(a:000, ' ')
  let neosnippet = neosnippet#variables#current_neosnippet()
  let options = { 'head' : 0, 'indent' : 0, 'word' : 0 }
  let new_snip = { a:key : { 'word' : a:key, 'snip' : snip, 'options' : options } }
  let neosnippet.snippets = extend(neosnippet.snippets, new_snip)
endfunction
command! -nargs=* AddOnetimeSnippet call Genki_add_onetime_snippet(<f-args>)
AlterCommand snip AddOnetimeSnippet