Hello,

I have just successfully upgraded 12 physical machines to the new Debian
release (Debian Buster) and can tell that the upgrade runs very smoothly.
Very nice job by all contributors, thank you very much!

I have noticed, that files previously existing under /usr/share/vim/vimfiles
have been (automatically?) moved to /etc/vim which in my case effectively
disabled them, because when I type `:set runtimepath` in VIM, I get the
following:

        
runtimepath=~/.vim,/var/lib/vim/addons,/usr/share/vim/vimfiles,/usr/share/vim/vim81,/usr/share/vim/vimfiles/after,/var/lib/vim/addons/after,~/.vim/after

To me, this indicates that `/usr/share/vim/vimfiles` is considered for
scripts, but `/etc/vim` is not.

My questions are as follows:

* Why has this happened?

  From a technical point of view, the rename seems to be triggered by
  vim-common's `postinst` script, which has a line:

        dpkg-maintscript-helper symlink_to_dir /usr/share/vim/vimfiles /etc/vim 
2:8.1.0639-2\~ vim-common -- "$@"

  While it is not exactly clear to me what it does, it looks as if
  for some reasons the rename from /usr/share/vim/vimfiles to /etc/vim is
  programmed by this. The command has a comment:

        # Automatically added by dh_installdeb/12.1.1

  which leaves me unclear to why this is actually there?

* Am I right to assume that /usr/share/vim/vimfiles should for some reason
  no longer be used (why else the rename)? If that is the case: What is an
  alternative outside the `/etc` region? I would like to provide a custom
  syntax file by means of a package and up to now, I am successfully writing
  it to `/usr/share/vim/vimfiles`. In fact, updating my package without
  doing any changes caused the files to be rewritten under
  `/usr/share/vim/vimfiles` which effectively re-enabled them...

If anyone knows details about this, some explanation would be very much
appreciated :)

In case it is needed/useful or part of the problem, I have attached my
`vimrc`.

Thanks in advance
Linux-Fan
" Customized Ma_Sys.ma VIMRC 1.0.0.24, Copyright (c) 2013--2015, 2017 Ma_Sys.ma.
" For further info send an e-mail to ma_sys...@web.de.

runtime! debian.vim
set nocompatible
set backspace=indent,eol,start  " more powerful backspacing
set history=400                 " keep 50 lines of command line history
set ruler                       " show the cursor position all the time

if filereadable("/usr/share/mdvl/d5man/d5manaddrc.vim")
        source /usr/share/mdvl/d5man/d5manaddrc.vim
endif

if has("syntax")
        syntax on
        syntax sync minlines=256
        autocmd BufNewFile,BufRead *.ma setfiletype masysma_note
endif

set background=dark

" Source a global configuration file if available
if filereadable("/etc/vim/vimrc.local")
        source /etc/vim/vimrc.local
endif

" Use \te to play tetris
if filereadable("/usr/share/mdvl/tetris.vim")
        source /usr/share/mdvl/tetris.vim
elseif filereadable("tetris.vim")
        source tetris.vim
endif

" HEX Editing using :Hexmode copied from
" http://vim.wikia.com/wiki/Improved_hex_editing
" ex command for toggling hex mode - define mapping if desired
command -bar Hexmode call ToggleHex()
" helper function to toggle hex mode
" If you really need a hex-editor, do not use this. Use dhex instead (unless
" you are under windows, then you are out of luck)!
function ToggleHex()
        " hex mode should be considered a read-only operation
        " save values for modified and read-only for restoration later,
        " and clear the read-only flag for now
        let l:modified=&mod
        let l:oldreadonly=&readonly
        let &readonly=0
        let l:oldmodifiable=&modifiable
        let &modifiable=1
        if !exists("b:editHex") || !b:editHex
                " save old options
                let b:oldft=&ft
                let b:oldbin=&bin
                " set new options
                setlocal binary " make sure it overrides any textwidth, etc.
                let &ft="xxd"
                " set status
                let b:editHex=1
                " switch to hex editor
                %!xxd
        else
                " restore old options
                let &ft=b:oldft
                if !b:oldbin
                setlocal nobinary
                endif
                " set status
                let b:editHex=0
                " return to normal editing
                %!xxd -r
        endif
        " restore values for modified and read only state
        let &mod=l:modified
        let &readonly=l:oldreadonly
        let &modifiable=l:oldmodifiable
endfunction

set printfont=courier:h9 " Smaller printing font size
set printoptions=formfeed:y,paper:a4
set hlsearch
highlight Search ctermbg=LightGreen
set title
set showcmd
" Copied from http://dougblack.io/words/a-good-vimrc.html
set wildmenu
set lazyredraw
" Copied from http://amix.dk/vim/vimrc.html
set noerrorbells
set tm=500
set ffs=unix,dos,mac
set laststatus=2
" disable bells
set vb t_vb=
" http://stackoverflow.com/questions/4775605/vim-syntax-highlight-improve-
"                                                               performance
set nocursorcolumn
set nocursorline

if exists("+colorcolumn")
        set colorcolumn=80
        hi ColorColumn ctermbg=DarkBlue
endif

set numberwidth=6
set nonumber
highlight LineNr cterm=NONE ctermbg=DarkGray ctermfg=White

" http://stackoverflow.com/questions/13093289/gvim-dynamically-change-font-
"                                                       based-on-window-size
function MaAutomaticLineNumbers()
        if winwidth(0) > 86
                set number
        else
                set nonumber
        endif
endfunction

if has("gui_running")
        " http://stackoverflow.com/questions/4229658/why-some-people-use-if-
        "                                       hasgui-running-in-a-gvimrc
        set number
        " http://eclim.org/eclimd.html#eclimd-headless
        set guioptions=cf
        set guioptions-=m " No menu
        set guioptions-=T " No toolbar
        set mouse=
        set t_Co=8
        " TODO Find better colorscheme
        " Ideally, it should look exactly like in the terminal in `gvim`
        color koehler
else
        autocmd VimResized * call MaAutomaticLineNumbers()
        " hack, WinResized would be better
        autocmd WinEnter * call MaAutomaticLineNumbers()
        call MaAutomaticLineNumbers()
endif

" Skip unwanted new Debian Stretch defaults (incsearch, autoindent), 2017/07/15
let skip_defaults_vim=1

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