graphical diff for git on mac os x

I just configured git to use FileMerge for diffs. FileMerge is a pretty graphical diff tool. I couldn't find quite the right invocation via google, so here's what I did:

1. Create ~/bin/git-diff-driver.sh with these contents:
   

   #!/bin/sh
   /usr/bin/opendiff "$2" "$5"
   



2. Make it executable
   

   chmod ugo+x ~/bin/git-diff-driver.sh

   
   


3. Make git use this little script for diffs. Edit ~/.gitconfig to include these lines:
   

   [diff] 
           external = "/Users/ben/bin/git-diff-driver.sh"
   

Now the next time that you call git diff HEAD FileMerge will open. GUI sweetness.