Pass parameter to external diff tool of gitk

Question

I tried to set external diff tool for gitk via Edit->Preference->External diff tool, but I cannot specify any extra parameter to the tool, like -d is needed for vimdiff. I tried quote the executable name and parameter separately like "vim.exe" "-d" but does't work. How to specify such extra diff tool parameters in gitk?

Answer 1

I created an exe wrapper to pass extra command line option to vim as vim.exe -d.