[info] diffview as git diff tool

[componhead]

Is it possible to use diffview as a git difftool? Because when I try, with a working dir clean, git ask me the usual question on diffing the file but the diff is void. I use the configuration:

[diff]
	tool = nvimdiff
[difftool "nvimdiff"]
	cmd = "nvim -f -c \"DiffviewOpen\""

with git difftool HEAD..origin/master the diff is void but, with files in working dir (i.e.: after git reset --mixed HEAD^) the diffing works as expected.