s:setup_vinegar() seems never to be triggered

[kiryph]

I was trying to solve #69 myself. However, a simple move of let g:netrw_hide_list = ... to s:setup_vinegar() does not work.

I have observed in general that a simple echo message in s:setup_vinegar() is never listed in :messages

function! s:setup_vinegar() abort
  echo "Updating g:netrw_list_hide within s:setup_vinegar()"
  let g:netrw_list_hide =
      \ join(map(split(&wildignore, ','), '"^".' . s:escape . '. "$"'), ',') . ',^\.\.\=/\=$' .
      \ (get(g:, 'netrw_list_hide', '')[-strlen(s:dotfiles)-1:-1] ==# s:dotfiles ? ','.s:dotfiles : '')

Addition

Following the discussion of
http://vi.stackexchange.com/questions/7890/how-to-display-line-number-in-netrw

au FileType netrw set nu does not work, but a special netrw variable (available in recent netrw versions) let g:netrw_bufsettings = 'noma nomod nu nobl nowrap ro'

So I am wondering whether vinegars autocmd does work

augroup vinegar
  autocmd!
  autocmd FileType netrw call s:setup_vinegar()
augroup END

A simple change to

augroup vinegar
  autocmd!
  autocmd FileType netrw echom "Greetings from augroup vinegar"
augroup END

,as far as I can confirm, does not change anything.

Following calls a custom function only when entering a file from netrw not when entering a netrw window.

fun! MyFuncRef()
    echom "Greetings from netrw_funcref"
endfun
let g:Netrw_funcref= function("MyFuncRef")

vim version: 7.4.1831
netrw version: v156

[kiryph]

Resolved this issue, netrw has an autocommand which silence messages.

function! s:setup_vinegar() abort
  unsilent echo "Updating g:netrw_list_hide within s:setup_vinegar()"