part of my .gitconfig file

gistfile1.txt

[merge]
    summary = true
    tool = "p4" 

[mergetool "p4"]
	cmd = /Applications/p4merge.app/Contents/Resources/launchp4merge \
            "$PWD/$BASE" \
                "$PWD/$LOCAL" \
                "$PWD/$REMOTE" \
                "$PWD/$MERGED" 
[diff.tool "p4"]
	cmd = /Applications/p4merge.app/Contents/Resources/launchp4merge \
            "$PWD/$BASE" \
                "$PWD/$LOCAL" \
                "$PWD/$REMOTE" \
                "$PWD/$MERGED" 
[diff]
	tool = p4mergetool
[difftool "p4mergetool"]
	cmd = /Applications/p4merge.app/Contents/Resources/launchp4merge $LOCAL $REMOTE