Output user, path and git branch at Mac prompt

This outputs the user, your path and the git branch:

function color_my_prompt {
local __user_and_host="\[\033[01;32m\]\u@\h"
local __cur_location="\[\033[01;34m\]\w"
local __git_branch_color="\[\033[31m\]"
#local __git_branch="\`ruby -e \"print (%x{git branch 2> /dev/null}.grep(/^\*/).first || '').gsub(/^\* (.+)$/, '(\1) ')\"\`"
local __git_branch='`git branch 2> /dev/null | grep -e ^* | sed -E s/^\\\\\*\ \(.+\)$/\(\\\\\1\)\ /`'
local __prompt_tail="\[\033[35m\]$"
local __last_color="\[\033[00m\]"
export PS1="$__user_and_host $__cur_location $__git_branch_color$__git_branch$__prompt_tail$__last_color "


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