1/ copy windiff.exe to C:/WinDiff.exe
2/ create wrapper file C:/windiff/windiff.sh :
#!/bin/sh
"C:/WinDiff.exe" "$1" "$2"
3/ add windiff directory to path via cmd (in admin mode) :
setx path "%path%;C:\windiff"
5/ add to .gitconfig (in C:/user/xxx/.gitconfig):
[diff]
tool = windiff
[difftool "windiff"]
cmd = windiff.sh \"$LOCAL\" \"$REMOTE\"
[difftool]
prompt = false
4/ use it with:
git difftool
OR
git difftool FILENAME