My .zshrc (part), gitconfig and diff_merge.sh for opening git diffs with DiffMerge app

.zshrc

# Which plugins would you like to load? (plugins can be found in ~/.oh-my-zsh/plugins/*)
plugins=(git osx brew svn)

# Normal aliases
alias gco='git co'
alias gci='git ci'
alias grb='git rb'
alias d='git diff --word-diff $@'
alias c='git commit -v $@'
alias s='git status -sb'
alias b='git branch -avv'
alias r='git svn rebase'
alias lg='git lg'
alias ls="ls -G"
alias ll='ls -hl'
alias la='ls -hal'

diff_merge.sh

#!/bin/sh

EXCLUDES="swc fla swf"
URL=$1
EXT=${URL#*.}

for i in $EXCLUDES
do
        if [ "$EXT" = "$i" ]; then
                echo Skipped binary file $1
                exit;
        fi  
done

echo Diff $1 $4
"/Applications/DiffMerge.app/Contents/MacOS/DiffMerge" -ro2 -t1="$1" -t2="$4" "$2" "$5"

git config

[user]
        name = Your Name
        email = Your Mail
[color]
        status = auto
        branch = auto
        diff = auto
[alias]
        co = checkout
        ci = commit
        rb = rebase
        lg = log --pretty=format:'%Cred%h%Creset%C(yellow)%d%Creset %s %Cgreen(%cr %an)%Creset' --abbrev-commit --date=relative
[diff]
        external = diff_merge.sh
        tool = diff_merge.sh