How to use VimR as git difftool (with DirDiff.vim)

When you use VimR as your git difftool, you usually want to have the window maximized and all tools hidden. However, you don't want to have these settings persisted for your next normal VimR window for editing. You can achieve this by using some of the included commands in VimR.

Place the following in ~/.config/nvim/ginit.vim

function! s:VimRTempMaxWin() abort
  VimRMakeSessionTemporary    " The tools, tool buttons and window settings are not persisted
  VimRHideTools
  VimRMaximizeWindow
endfunction
command! -nargs=0 VimRTempMaxWin call s:VimRTempMaxWin()

and set your difftool in ~/.gitconfig

[difftool "vimrdiff"]
  cmd = vimr --wait --nvim '+au GUIEnter * execute \"DirDiff\" argv(0) argv(1)' '+au GUIEnter * VimRTempMaxWin' $LOCAL $REMOTE
[diff]
  tool = vimrdiff

---

If you use DirDiff.vim, then you want to do the following in ~/.config/nvim/ginit.vim

function! s:VimRTempMaxWin() abort
  VimRMakeSessionTemporary    " The tools, tool buttons and window settings are not persisted
  VimRHideTools
  VimRMaximizeWindow
endfunction
command! -nargs=0 VimRTempMaxWin call s:VimRTempMaxWin()

function! s:VimRDifDiff() abort
  VimRTempMaxWin
  sleep 500m        " Yes, ugly, but I could not find a better solution.
  normal o          " Select the first file (again) to resize the panes.
endfunction
command! -nargs=0 VimRDirDiff call s:VimRDirDiff()

and in ~/.gitconfig

[difftool "vimrdiff"]
  cmd = vimr --wait --nvim '+au GUIEnter * execute \"DirDiff\" argv(0) argv(1)' '+au GUIEnter * VimRDirDiff' $LOCAL $REMOTE
[diff]
  tool = vimrdiff