neosnippet.vim/autoload/unite/sources/neosnippet_file.vim

"=============================================================================
" FILE: neosnippet_file.vim
" AUTHOR:  Shougo Matsushita <Shougo.Matsu at gmail.com>
" License: MIT license
"=============================================================================

function! unite#sources#neosnippet_file#define() abort
  return [s:source_user, s:source_runtime]
endfunction

" common action table
let s:action_table = {}
let s:action_table.neosnippet_source = {
      \ 'description' : 'neosnippet_source file',
      \ 'is_selectable' : 1,
      \ 'is_quit' : 1,
      \ }
function! s:action_table.neosnippet_source.func(candidates) abort
  for candidate in a:candidates
    let snippet_name = candidate.action__path
    if snippet_name != ''
      call neosnippet#commands#_source(snippet_name)
    endif
  endfor
endfunction

" neosnippet source.
let s:source_user = {
      \ 'name': 'neosnippet/user',
      \ 'description' : 'neosnippet user file',
      \ 'action_table' : copy(s:action_table),
      \ }
function! s:source_user.gather_candidates(args, context) abort
  return s:get_snippet_candidates(
        \ neosnippet#get_user_snippets_directory())
endfunction

let s:source_user.action_table.unite__new_candidate = {
      \ 'description' : 'create new user snippet',
      \ 'is_invalidate_cache' : 1,
      \ 'is_quit' : 1,
      \ }
function! s:source_user.action_table.unite__new_candidate.func(candidate) abort
  let filename = input(
        \ 'New snippet file name: ', neosnippet#helpers#get_filetype())
  if filename != ''
    call neosnippet#commands#_edit(filename)
  endif
endfunction


" neosnippet source.
let s:source_runtime = {
      \ 'name': 'neosnippet/runtime',
      \ 'description' : 'neosnippet runtime file',
      \ 'action_table' : copy(s:action_table),
      \ }
function! s:source_runtime.gather_candidates(args, context) abort
  return s:get_snippet_candidates(
        \ neosnippet#get_runtime_snippets_directory())
endfunction

let s:source_runtime.action_table.unite__new_candidate = {
      \ 'description' : 'create new runtime snippet',
      \ 'is_invalidate_cache' : 1,
      \ 'is_quit' : 1,
      \ }
function! s:source_runtime.action_table.unite__new_candidate.func(candidate) abort
  let filename = input(
        \ 'New snippet file name: ', neosnippet#helpers#get_filetype())
  if filename != ''
    call neosnippet#commands#_edit('-runtime ' . filename)
  endif
endfunction


function! s:get_snippet_candidates(dirs) abort
  let _ = []
  for directory in a:dirs
    let _ += map(split(unite#util#substitute_path_separator(
          \ globpath(directory, '**/*.snip*')), '\n'), "{
          \    'word' : v:val[len(directory)+1 :],
          \    'action__path' : v:val,
          \    'kind' : 'file',
          \ }")
  endfor

  return _
endfunction