My .bash_profile setup on OS X. Modified from Mark Otto's bash style (http://markdotto.com/2013/01/13/improved-terminal-hotness/) by adding git color for status.

gistfile1.sh

alias ls='ls -Glah'
alias web='open -a Safari.app'
alias mail='open -a Mail.app'
alias todo='open -a Reminders.app'
git_branch () {
    if git rev-parse --git-dir >/dev/null 2>&1
        then echo -e "" [$(git branch 2>/dev/null| sed -n '/^\*/s/^\* //p')]
    else
        echo ""
    fi
}
function git_color {
    local STATUS=`git status 2>&1`
    if [[ "$STATUS" == *'Not a git repository'* ]]
        then echo ""
    else
    if [[ "$STATUS" != *'working directory clean'* ]]
        then
        # red if need to commit
        echo -e '\033[0;31m'
    else
    if [[ "$STATUS" == *'Your branch is ahead'* ]]
        then
        # yellow if need to push
        echo -e '\033[0;33m'
    else
        # else cyan
        echo -e '\033[0;32m'
    fi
    fi
    fi
}
export PS1='\[\033[0;35m\]⌘ \[\033[0;34m\]\w/\[$(git_color)\]$(git_branch)\[\033[m\] '