git-mergetool/difftool: make (g)vimdiff workable under Windows

diff --git a/contrib/difftool/git-difftool-helper b/contrib/difftool/git-difftool-helper
index 9c0a13452a60059b504f07cb94a3cc16e1a2e6e7..e481913c91c83a19c5e10db1f66949c60d24b4f1 100755 (executable)
--- a/contrib/difftool/git-difftool-helper
+++ b/contrib/difftool/git-difftool-helper
@@ -86,11 +86,11 @@ launch_merge_tool () {
                ;;
 
        vimdiff)
-               "$merge_tool_path" -c "wincmd l" "$LOCAL" "$REMOTE"
+               "$merge_tool_path" -d -c "wincmd l" "$LOCAL" "$REMOTE"
                ;;
 
        gvimdiff)
-               "$merge_tool_path" -c "wincmd l" -f "$LOCAL" "$REMOTE"
+               "$merge_tool_path" -d -c "wincmd l" -f "$LOCAL" "$REMOTE"
                ;;
 
        xxdiff)
@@ -160,6 +160,12 @@ init_merge_tool_path() {
        merge_tool_path=$(git config mergetool."$1".path)
        if test -z "$merge_tool_path"; then
                case "$1" in
+               vimdiff)
+                       merge_tool_path=vim
+                       ;;
+               gvimdiff)
+                       merge_tool_path=gvim
+                       ;;
                emerge)
                        merge_tool_path=emacs
                        ;;