gitconfig and VimR command for git difftool with DirDiff.vim

.gitconfig

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

# When you now use git difftool, then the VimR window will be maximized and all tools hidden.
# And these settings will not be persisted

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()