OSX ssh-agent forwarding -> .bash_profile

.bash_profile

#####################
#  ssh-agent stuff  #
#####################
# get the ssh agent started
SSH_ENV="$HOME/.ssh/environment"

function start_agent {
	echo "Initialising new SSH agent..."
	/usr/bin/ssh-agent | sed 's/^echo/#echo/' > "${SSH_ENV}"
	echo succeeded
	chmod 600 "${SSH_ENV}"
	. "${SSH_ENV}" > /dev/null
	/usr/bin/ssh-add;
}

# Source SSH settings, if applicable
if [ -f "${SSH_ENV}" ]; then
	. "${SSH_ENV}" > /dev/null
	ps -ef | grep ${SSH_AGENT_PID} | grep ssh-agent$ > /dev/null || {
	start_agent;
	}
else
	start_agent;
fi 

add to .bash_profile